Merge pull request #4032 from adamreese/dev-v3-errors

feat(*): print stacktrace on error with debug enabled

cmd/helm/completion.go

@@ -17,9 +17,9 @@ package main
 
 import (
 	"bytes"
-	"fmt"
 	"io"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
 
@@ -63,14 +63,14 @@ func newCompletionCmd(out io.Writer) *cobra.Command {
 
 func runCompletion(out io.Writer, cmd *cobra.Command, args []string) error {
 	if len(args) == 0 {
-		return fmt.Errorf("shell not specified")
+		return errors.New("shell not specified")
 	}
 	if len(args) > 1 {
-		return fmt.Errorf("too many arguments, expected only the shell type")
+		return errors.New("too many arguments, expected only the shell type")
 	}
 	run, found := completionShells[args[0]]
 	if !found {
-		return fmt.Errorf("unsupported shell type %q", args[0])
+		return errors.Errorf("unsupported shell type %q", args[0])
 	}
 
 	return run(out, cmd)

cmd/helm/create.go

@@ -17,11 +17,11 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"path/filepath"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/chartutil"

cmd/helm/delete.go

@@ -17,10 +17,10 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/helm"

cmd/helm/docs.go

@@ -16,10 +16,10 @@ limitations under the License.
 package main
 
 import (
-	"fmt"
 	"io"
 	"path/filepath"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/cobra/doc"
 )
@@ -74,6 +74,6 @@ func (o *docsOptions) run(out io.Writer) error {
 	case "bash":
 		return o.topCmd.GenBashCompletionFile(filepath.Join(o.dest, "completions.bash"))
 	default:
-		return fmt.Errorf("unknown doc type %q. Try 'markdown' or 'man'", o.docTypeString)
+		return errors.Errorf("unknown doc type %q. Try 'markdown' or 'man'", o.docTypeString)
 	}
 }

cmd/helm/fetch.go

@@ -23,6 +23,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/chartutil"
@@ -74,7 +75,7 @@ func newFetchCmd(out io.Writer) *cobra.Command {
 		Long:  fetchDesc,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if len(args) == 0 {
-				return fmt.Errorf("need at least one argument, url or repo/name of the chart")
+				return errors.Errorf("need at least one argument, url or repo/name of the chart")
 			}
 
 			if o.version == "" && o.devel {
@@ -135,7 +136,7 @@ func (o *fetchOptions) run(out io.Writer) error {
 		var err error
 		dest, err = ioutil.TempDir("", "helm-")
 		if err != nil {
-			return fmt.Errorf("Failed to untar: %s", err)
+			return errors.Wrap(err, "failed to untar")
 		}
 		defer os.RemoveAll(dest)
 	}
@@ -165,11 +166,11 @@ func (o *fetchOptions) run(out io.Writer) error {
 		}
 		if fi, err := os.Stat(ud); err != nil {
 			if err := os.MkdirAll(ud, 0755); err != nil {
-				return fmt.Errorf("Failed to untar (mkdir): %s", err)
+				return errors.Wrap(err, "failed to untar (mkdir)")
 			}
 
 		} else if !fi.IsDir() {
-			return fmt.Errorf("Failed to untar: %s is not a directory", ud)
+			return errors.Errorf("failed to untar: %s is not a directory", ud)
 		}
 
 		return chartutil.ExpandFile(ud, saved)

cmd/helm/get.go

@@ -17,9 +17,9 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"io"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/helm"

cmd/helm/helm.go

@@ -24,6 +24,7 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	// Import to initialize client auth plugins.
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
@@ -132,6 +133,7 @@ func logf(format string, v ...interface{}) {
 func main() {
 	cmd := newRootCmd(nil, os.Stdout, os.Args[1:])
 	if err := cmd.Execute(); err != nil {
+		logf("%+v", err)
 		os.Exit(1)
 	}
 }
@@ -143,7 +145,7 @@ func checkArgsLength(argsReceived int, requiredArgs ...string) error {
 		if expectedNum == 1 {
 			arg = "argument"
 		}
-		return fmt.Errorf("This command needs %v %s: %s", expectedNum, arg, strings.Join(requiredArgs, ", "))
+		return errors.Errorf("this command needs %v %s: %s", expectedNum, arg, strings.Join(requiredArgs, ", "))
 	}
 	return nil
 }

cmd/helm/helm_test.go

@@ -18,7 +18,6 @@ package main
 
 import (
 	"bytes"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -26,6 +25,7 @@ import (
 	"testing"
 
 	shellwords "github.com/mattn/go-shellwords"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/internal/test"
@@ -117,7 +117,7 @@ func ensureTestHome(t *testing.T, home helmpath.Home) error {
 		home.Starters(),
 	} {
 		if err := os.MkdirAll(p, 0755); err != nil {
-			return fmt.Errorf("Could not create %s: %s", p, err)
+			return errors.Wrapf(err, "could not create %s", p)
 		}
 	}
 

cmd/helm/history.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/ghodss/yaml"
 	"github.com/gosuri/uitable"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/hapi/chart"
@@ -114,7 +115,7 @@ func (o *historyOptions) run(out io.Writer) error {
 	case "table":
 		history = formatAsTable(releaseHistory, o.colWidth)
 	default:
-		return fmt.Errorf("unknown output format %q", o.outputFormat)
+		return errors.Errorf("unknown output format %q", o.outputFormat)
 	}
 
 	if formattingError != nil {

cmd/helm/init.go

@@ -17,11 +17,11 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"os"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/getter"
@@ -54,7 +54,7 @@ func newInitCmd(out io.Writer) *cobra.Command {
 		Long:  initDesc,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			if len(args) != 0 {
-				return errors.New("This command does not accept arguments")
+				return errors.New("this command does not accept arguments")
 			}
 			o.home = settings.Home
 			return o.run(out)
@@ -100,10 +100,10 @@ func ensureDirectories(home helmpath.Home, out io.Writer) error {
 		if fi, err := os.Stat(p); err != nil {
 			fmt.Fprintf(out, "Creating %s \n", p)
 			if err := os.MkdirAll(p, 0755); err != nil {
-				return fmt.Errorf("Could not create %s: %s", p, err)
+				return errors.Wrapf(err, "could not create %s", p)
 			}
 		} else if !fi.IsDir() {
-			return fmt.Errorf("%s must be a directory", p)
+			return errors.Errorf("%s must be a directory", p)
 		}
 	}
 
@@ -124,7 +124,7 @@ func ensureDefaultRepos(home helmpath.Home, out io.Writer, skipRefresh bool, url
 			return err
 		}
 	} else if fi.IsDir() {
-		return fmt.Errorf("%s must be a file, not a directory", repoFile)
+		return errors.Errorf("%s must be a file, not a directory", repoFile)
 	}
 	return nil
 }
@@ -148,7 +148,7 @@ func initRepo(url, cacheFile string, out io.Writer, skipRefresh bool, home helmp
 	// In this case, the cacheFile is always absolute. So passing empty string
 	// is safe.
 	if err := r.DownloadIndexFile(""); err != nil {
-		return nil, fmt.Errorf("Looks like %q is not a valid chart repository or cannot be reached: %s", url, err.Error())
+		return nil, errors.Wrapf(err, "looks like %q is not a valid chart repository or cannot be reached: %s", url)
 	}
 
 	return &c, nil

cmd/helm/install.go

@@ -18,7 +18,6 @@ package main
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -30,6 +29,7 @@ import (
 
 	"github.com/Masterminds/sprig"
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/chartutil"
@@ -250,7 +250,7 @@ func (o *installOptions) run(out io.Writer) error {
 
 		}
 	} else if err != chartutil.ErrRequirementsNotFound {
-		return fmt.Errorf("cannot load requirements: %v", err)
+		return errors.Wrap(err, "cannot load requirements")
 	}
 
 	rel, err := o.client.InstallReleaseFromChart(
@@ -315,7 +315,7 @@ func mergeValues(dest, src map[string]interface{}) map[string]interface{} {
 
 // vals merges values from files specified via -f/--values and
 // directly via --set or --set-string, marshaling them to YAML
-func vals(valueFiles valueFiles, values []string, stringValues []string) ([]byte, error) {
+func vals(valueFiles valueFiles, values, stringValues []string) ([]byte, error) {
 	base := map[string]interface{}{}
 
 	// User specified a values files via -f/--values
@@ -335,7 +335,7 @@ func vals(valueFiles valueFiles, values []string, stringValues []string) ([]byte
 		}
 
 		if err := yaml.Unmarshal(bytes, &currentMap); err != nil {
-			return []byte{}, fmt.Errorf("failed to parse %s: %s", filePath, err)
+			return []byte{}, errors.Wrapf(err, "failed to parse %s", filePath)
 		}
 		// Merge with the previous map
 		base = mergeValues(base, currentMap)
@@ -344,14 +344,14 @@ func vals(valueFiles valueFiles, values []string, stringValues []string) ([]byte
 	// User specified a value via --set
 	for _, value := range values {
 		if err := strvals.ParseInto(value, base); err != nil {
-			return []byte{}, fmt.Errorf("failed parsing --set data: %s", err)
+			return []byte{}, errors.Wrap(err, "failed parsing --set data")
 		}
 	}
 
 	// User specified a value via --set-string
 	for _, value := range stringValues {
 		if err := strvals.ParseIntoString(value, base); err != nil {
-			return []byte{}, fmt.Errorf("failed parsing --set-string data: %s", err)
+			return []byte{}, errors.Wrap(err, "failed parsing --set-string data")
 		}
 	}
 
@@ -401,7 +401,7 @@ func locateChartPath(repoURL, username, password, name, version string, verify b
 		return abs, nil
 	}
 	if filepath.IsAbs(name) || strings.HasPrefix(name, ".") {
-		return name, fmt.Errorf("path %q not found", name)
+		return name, errors.Errorf("path %q not found", name)
 	}
 
 	crepo := filepath.Join(settings.Home.Repository(), name)
@@ -445,7 +445,7 @@ func locateChartPath(repoURL, username, password, name, version string, verify b
 		return filename, err
 	}
 
-	return filename, fmt.Errorf("failed to download %q (hint: running `helm repo update` may help)", name)
+	return filename, errors.Errorf("failed to download %q (hint: running `helm repo update` may help)", name)
 }
 
 func generateName(nameTemplate string) (string, error) {
@@ -479,7 +479,7 @@ func checkDependencies(ch *chart.Chart, reqs *chartutil.Requirements) error {
 	}
 
 	if len(missing) > 0 {
-		return fmt.Errorf("found in requirements.yaml, but missing in charts/ directory: %s", strings.Join(missing, ", "))
+		return errors.Errorf("found in requirements.yaml, but missing in charts/ directory: %s", strings.Join(missing, ", "))
 	}
 	return nil
 }

cmd/helm/lint.go

@@ -17,7 +17,6 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -26,6 +25,7 @@ import (
 	"strings"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/chartutil"
@@ -74,7 +74,7 @@ func newLintCmd(out io.Writer) *cobra.Command {
 	return cmd
 }
 
-var errLintNoChart = errors.New("No chart found for linting (missing Chart.yaml)")
+var errLintNoChart = errors.New("no chart found for linting (missing Chart.yaml)")
 
 func (o *lintOptions) run(out io.Writer) error {
 	var lowestTolerance int
@@ -120,7 +120,7 @@ func (o *lintOptions) run(out io.Writer) error {
 
 	msg := fmt.Sprintf("%d chart(s) linted", total)
 	if failures > 0 {
-		return fmt.Errorf("%s, %d chart(s) failed", msg, failures)
+		return errors.Errorf("%s, %d chart(s) failed", msg, failures)
 	}
 
 	fmt.Fprintf(out, "%s, no failures\n", msg)
@@ -151,7 +151,7 @@ func lintChart(path string, vals []byte, namespace string, strict bool) (support
 
 		lastHyphenIndex := strings.LastIndex(filepath.Base(path), "-")
 		if lastHyphenIndex <= 0 {
-			return linter, fmt.Errorf("unable to parse chart archive %q, missing '-'", filepath.Base(path))
+			return linter, errors.Errorf("unable to parse chart archive %q, missing '-'", filepath.Base(path))
 		}
 		base := filepath.Base(path)[:lastHyphenIndex]
 		chartPath = filepath.Join(tempDir, base)
@@ -179,7 +179,7 @@ func (o *lintOptions) vals() ([]byte, error) {
 		}
 
 		if err := yaml.Unmarshal(bytes, &currentMap); err != nil {
-			return []byte{}, fmt.Errorf("failed to parse %s: %s", filePath, err)
+			return []byte{}, errors.Wrapf(err, "failed to parse %s", filePath)
 		}
 		// Merge with the previous map
 		base = mergeValues(base, currentMap)
@@ -188,14 +188,14 @@ func (o *lintOptions) vals() ([]byte, error) {
 	// User specified a value via --set
 	for _, value := range o.values {
 		if err := strvals.ParseInto(value, base); err != nil {
-			return []byte{}, fmt.Errorf("failed parsing --set data: %s", err)
+			return []byte{}, errors.Wrap(err, "failed parsing --set data")
 		}
 	}
 
 	// User specified a value via --set-string
 	for _, value := range o.sValues {
 		if err := strvals.ParseIntoString(value, base); err != nil {
-			return []byte{}, fmt.Errorf("failed parsing --set-string data: %s", err)
+			return []byte{}, errors.Wrap(err, "failed parsing --set-string data")
 		}
 	}
 

cmd/helm/lint_test.go

@@ -33,22 +33,18 @@ var (
 
 func TestLintChart(t *testing.T) {
 	if _, err := lintChart(chartDirPath, values, namespace, strict); err != nil {
-		t.Errorf("%s", err)
+		t.Error(err)
 	}
-
 	if _, err := lintChart(archivedChartPath, values, namespace, strict); err != nil {
-		t.Errorf("%s", err)
+		t.Error(err)
 	}
-
 	if _, err := lintChart(archivedChartPathWithHyphens, values, namespace, strict); err != nil {
-		t.Errorf("%s", err)
+		t.Error(err)
 	}
-
 	if _, err := lintChart(invalidArchivedChartPath, values, namespace, strict); err == nil {
-		t.Errorf("Expected a chart parsing error")
+		t.Error("Expected a chart parsing error")
 	}
-
 	if _, err := lintChart(chartMissingManifest, values, namespace, strict); err == nil {
-		t.Errorf("Expected a chart parsing error")
+		t.Error("Expected a chart parsing error")
 	}
 }

cmd/helm/load_plugins.go

@@ -23,6 +23,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/plugin"
@@ -87,7 +88,7 @@ func loadPlugins(baseCmd *cobra.Command, out io.Writer) {
 				if err := prog.Run(); err != nil {
 					if eerr, ok := err.(*exec.ExitError); ok {
 						os.Stderr.Write(eerr.Stderr)
-						return fmt.Errorf("plugin %q exited with error", md.Name)
+						return errors.Errorf("plugin %q exited with error", md.Name)
 					}
 					return err
 				}

cmd/helm/package.go

@@ -17,7 +17,6 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -27,6 +26,7 @@ import (
 
 	"github.com/Masterminds/semver"
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"golang.org/x/crypto/ssh/terminal"
 
@@ -77,7 +77,7 @@ func newPackageCmd(out io.Writer) *cobra.Command {
 		RunE: func(cmd *cobra.Command, args []string) error {
 			o.home = settings.Home
 			if len(args) == 0 {
-				return fmt.Errorf("need at least one argument, the path to the chart")
+				return errors.Errorf("need at least one argument, the path to the chart")
 			}
 			if o.sign {
 				if o.key == "" {
@@ -166,7 +166,7 @@ func (o *packageOptions) run(out io.Writer) error {
 	}
 
 	if filepath.Base(path) != ch.Metadata.Name {
-		return fmt.Errorf("directory name (%s) and Chart.yaml name (%s) must match", filepath.Base(path), ch.Metadata.Name)
+		return errors.Errorf("directory name (%s) and Chart.yaml name (%s) must match", filepath.Base(path), ch.Metadata.Name)
 	}
 
 	if reqs, err := chartutil.LoadRequirements(ch); err == nil {
@@ -195,7 +195,7 @@ func (o *packageOptions) run(out io.Writer) error {
 	if err == nil {
 		fmt.Fprintf(out, "Successfully packaged chart and saved it to: %s\n", name)
 	} else {
-		return fmt.Errorf("Failed to save: %s", err)
+		return errors.Wrap(err, "failed to save")
 	}
 
 	if o.sign {

cmd/helm/plugin.go

@@ -16,13 +16,13 @@ limitations under the License.
 package main
 
 import (
-	"fmt"
 	"io"
 	"os"
 	"os/exec"
 
 	"k8s.io/helm/pkg/plugin"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
 
@@ -64,7 +64,7 @@ func runHook(p *plugin.Plugin, event string) error {
 	if err := prog.Run(); err != nil {
 		if eerr, ok := err.(*exec.ExitError); ok {
 			os.Stderr.Write(eerr.Stderr)
-			return fmt.Errorf("plugin %s hook for %q exited with error", event, p.Metadata.Name)
+			return errors.Errorf("plugin %s hook for %q exited with error", event, p.Metadata.Name)
 		}
 		return err
 	}

cmd/helm/plugin_remove.go

@@ -16,16 +16,16 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"os"
 	"strings"
 
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+
 	"k8s.io/helm/pkg/helm/helmpath"
 	"k8s.io/helm/pkg/plugin"
-
-	"github.com/spf13/cobra"
 )
 
 type pluginRemoveOptions struct {
@@ -76,7 +76,7 @@ func (o *pluginRemoveOptions) run(out io.Writer) error {
 		}
 	}
 	if len(errorPlugins) > 0 {
-		return fmt.Errorf(strings.Join(errorPlugins, "\n"))
+		return errors.Errorf(strings.Join(errorPlugins, "\n"))
 	}
 	return nil
 }

cmd/helm/plugin_update.go

@@ -16,17 +16,17 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"path/filepath"
 	"strings"
 
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+
 	"k8s.io/helm/pkg/helm/helmpath"
 	"k8s.io/helm/pkg/plugin"
 	"k8s.io/helm/pkg/plugin/installer"
-
-	"github.com/spf13/cobra"
 )
 
 type pluginUpdateOptions struct {
@@ -79,7 +79,7 @@ func (o *pluginUpdateOptions) run(out io.Writer) error {
 		}
 	}
 	if len(errorPlugins) > 0 {
-		return fmt.Errorf(strings.Join(errorPlugins, "\n"))
+		return errors.Errorf(strings.Join(errorPlugins, "\n"))
 	}
 	return nil
 }

cmd/helm/release_testing.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"io"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/hapi/release"
@@ -98,5 +99,5 @@ type testErr struct {
 }
 
 func (err *testErr) Error() error {
-	return fmt.Errorf("%v test(s) failed", err.failed)
+	return errors.Errorf("%v test(s) failed", err.failed)
 }

cmd/helm/repo_add.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"io"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/getter"
@@ -85,7 +86,7 @@ func addRepository(name, url, username, password string, home helmpath.Home, cer
 	}
 
 	if noUpdate && f.Has(name) {
-		return fmt.Errorf("repository name (%s) already exists, please specify a different name", name)
+		return errors.Errorf("repository name (%s) already exists, please specify a different name", name)
 	}
 
 	cif := home.CacheIndex(name)
@@ -106,7 +107,7 @@ func addRepository(name, url, username, password string, home helmpath.Home, cer
 	}
 
 	if err := r.DownloadIndexFile(home.Cache()); err != nil {
-		return fmt.Errorf("Looks like %q is not a valid chart repository or cannot be reached: %s", url, err.Error())
+		return errors.Wrapf(err, "looks like %q is not a valid chart repository or cannot be reached", url)
 	}
 
 	f.Update(&c)

cmd/helm/repo_index.go

@@ -17,11 +17,11 @@ limitations under the License.
 package main
 
 import (
-	"fmt"
 	"io"
 	"os"
 	"path/filepath"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/repo"
@@ -94,7 +94,7 @@ func index(dir, url, mergeTo string) error {
 		} else {
 			i2, err = repo.LoadIndexFile(mergeTo)
 			if err != nil {
-				return fmt.Errorf("Merge failed: %s", err)
+				return errors.Wrap(err, "merge failed")
 			}
 		}
 		i.Merge(i2)

cmd/helm/repo_list.go

@@ -17,11 +17,11 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 
 	"github.com/gosuri/uitable"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/helm/helmpath"

cmd/helm/repo_remove.go

@@ -21,6 +21,7 @@ import (
 	"io"
 	"os"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/helm/helmpath"
@@ -65,7 +66,7 @@ func removeRepoLine(out io.Writer, name string, home helmpath.Home) error {
 	}
 
 	if !r.Remove(name) {
-		return fmt.Errorf("no repo named %q found", name)
+		return errors.Errorf("no repo named %q found", name)
 	}
 	if err := r.WriteFile(repoFile, 0644); err != nil {
 		return err

cmd/helm/repo_update.go

@@ -17,11 +17,11 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"sync"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/getter"

cmd/helm/rollback.go

@@ -21,6 +21,7 @@ import (
 	"io"
 	"strconv"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/helm"
@@ -62,7 +63,7 @@ func newRollbackCmd(c helm.Interface, out io.Writer) *cobra.Command {
 
 			v64, err := strconv.ParseInt(args[1], 10, 32)
 			if err != nil {
-				return fmt.Errorf("invalid revision number '%q': %s", args[1], err)
+				return errors.Wrapf(err, "invalid revision number '%q'", args[1])
 			}
 
 			o.revision = int(v64)

cmd/helm/search.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/Masterminds/semver"
 	"github.com/gosuri/uitable"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/cmd/helm/search"
@@ -104,7 +105,7 @@ func (o *searchOptions) applyConstraint(res []*search.Result) ([]*search.Result,
 
 	constraint, err := semver.NewConstraint(o.version)
 	if err != nil {
-		return res, fmt.Errorf("an invalid version/constraint format: %s", err)
+		return res, errors.Wrap(err, "an invalid version/constraint format")
 	}
 
 	data := res[:0]

cmd/helm/search/search.go

@@ -23,13 +23,14 @@ to find matches.
 package search
 
 import (
-	"errors"
 	"path"
 	"regexp"
 	"sort"
 	"strings"
 
 	"github.com/Masterminds/semver"
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/repo"
 )
 

cmd/helm/status.go

@@ -26,6 +26,7 @@ import (
 	"github.com/ghodss/yaml"
 	"github.com/gosuri/uitable"
 	"github.com/gosuri/uitable/util/strutil"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/hapi"
@@ -87,20 +88,20 @@ func (o *statusOptions) run(out io.Writer) error {
 	case "json":
 		data, err := json.Marshal(res)
 		if err != nil {
-			return fmt.Errorf("Failed to Marshal JSON output: %s", err)
+			return errors.Wrap(err, "failed to Marshal JSON output")
 		}
 		out.Write(data)
 		return nil
 	case "yaml":
 		data, err := yaml.Marshal(res)
 		if err != nil {
-			return fmt.Errorf("Failed to Marshal YAML output: %s", err)
+			return errors.Wrap(err, "failed to Marshal YAML output")
 		}
 		out.Write(data)
 		return nil
 	}
 
-	return fmt.Errorf("Unknown output format %q", o.outfmt)
+	return errors.Errorf("unknown output format %q", o.outfmt)
 }
 
 // PrintStatus prints out the status of a release. Shared because also used by

cmd/helm/template.go

@@ -17,7 +17,6 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -28,6 +27,7 @@ import (
 	"time"
 
 	"github.com/Masterminds/semver"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/chartutil"
@@ -120,7 +120,7 @@ func (o *templateOptions) run(out io.Writer) error {
 			if !filepath.IsAbs(f) {
 				af, err = filepath.Abs(filepath.Join(o.chartPath, f))
 				if err != nil {
-					return fmt.Errorf("could not resolve template path: %s", err)
+					return errors.Wrap(err, "could not resolve template path")
 				}
 			} else {
 				af = f
@@ -128,7 +128,7 @@ func (o *templateOptions) run(out io.Writer) error {
 			rf = append(rf, af)
 
 			if _, err := os.Stat(af); err != nil {
-				return fmt.Errorf("could not resolve template path: %s", err)
+				return errors.Wrap(err, "could not resolve template path")
 			}
 		}
 	}
@@ -137,7 +137,7 @@ func (o *templateOptions) run(out io.Writer) error {
 	if o.outputDir != "" {
 		_, err = os.Stat(o.outputDir)
 		if os.IsNotExist(err) {
-			return fmt.Errorf("output-dir '%s' does not exist", o.outputDir)
+			return errors.Errorf("output-dir '%s' does not exist", o.outputDir)
 		}
 	}
 
@@ -166,7 +166,7 @@ func (o *templateOptions) run(out io.Writer) error {
 			return err
 		}
 	} else if err != chartutil.ErrRequirementsNotFound {
-		return fmt.Errorf("cannot load requirements: %v", err)
+		return errors.Wrap(err, "cannot load requirements")
 	}
 	options := chartutil.ReleaseOptions{
 		Name:      o.releaseName,
@@ -195,7 +195,7 @@ func (o *templateOptions) run(out io.Writer) error {
 	// kubernetes version
 	kv, err := semver.NewVersion(o.kubeVersion)
 	if err != nil {
-		return fmt.Errorf("could not parse a kubernetes version: %v", err)
+		return errors.Wrap(err, "could not parse a kubernetes version")
 	}
 	caps.KubeVersion.Major = fmt.Sprint(kv.Major())
 	caps.KubeVersion.Minor = fmt.Sprint(kv.Minor())
@@ -277,7 +277,7 @@ func (o *templateOptions) run(out io.Writer) error {
 }
 
 // write the <data> to <output-dir>/<name>
-func writeToFile(outputDir string, name string, data string) error {
+func writeToFile(outputDir, name, data string) error {
 	outfileName := strings.Join([]string{outputDir, name}, string(filepath.Separator))
 
 	err := ensureDirectoryForFile(outfileName)

cmd/helm/testdata/output/install-no-args.txt

@@ -1 +1 @@
-Error: This command needs 1 argument: chart name
+Error: this command needs 1 argument: chart name

cmd/helm/testdata/output/rollback-no-args.txt

@@ -1 +1 @@
-Error: This command needs 2 arguments: release name, revision number
+Error: this command needs 2 arguments: release name, revision number

cmd/helm/testdata/output/upgrade-with-missing-dependencies.txt

@@ -1 +1 @@
-Error: This command needs 2 arguments: release name, chart path
+Error: this command needs 2 arguments: release name, chart path

cmd/helm/upgrade.go

@@ -21,6 +21,7 @@ import (
 	"io"
 	"strings"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/chartutil"
@@ -132,8 +133,6 @@ func newUpgradeCmd(client helm.Interface, out io.Writer) *cobra.Command {
 	f.StringVar(&o.caFile, "ca-file", "", "verify certificates of HTTPS-enabled servers using this CA bundle")
 	f.BoolVar(&o.devel, "devel", false, "use development versions, too. Equivalent to version '>0.0.0-0'. If --version is set, this is ignored.")
 
-	f.MarkDeprecated("disable-hooks", "use --no-hooks instead")
-
 	return cmd
 }
 
@@ -180,7 +179,7 @@ func (o *upgradeOptions) run(out io.Writer) error {
 				return err
 			}
 		} else if err != chartutil.ErrRequirementsNotFound {
-			return fmt.Errorf("cannot load requirements: %v", err)
+			return errors.Wrap(err, "cannot load requirements")
 		}
 	} else {
 		return err
@@ -199,7 +198,7 @@ func (o *upgradeOptions) run(out io.Writer) error {
 		helm.ReuseValues(o.reuseValues),
 		helm.UpgradeWait(o.wait))
 	if err != nil {
-		return fmt.Errorf("UPGRADE FAILED: %v", err)
+		return errors.Wrap(err, "UPGRADE FAILED")
 	}
 
 	if settings.Debug {

cmd/helm/verify.go

@@ -16,9 +16,9 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"io"
 
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/pkg/downloader"

pkg/chartutil/chartfile.go

@@ -17,13 +17,12 @@ limitations under the License.
 package chartutil
 
 import (
-	"errors"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/hapi/chart"
 )
@@ -68,17 +67,17 @@ func IsChartDir(dirName string) (bool, error) {
 	if fi, err := os.Stat(dirName); err != nil {
 		return false, err
 	} else if !fi.IsDir() {
-		return false, fmt.Errorf("%q is not a directory", dirName)
+		return false, errors.Errorf("%q is not a directory", dirName)
 	}
 
 	chartYaml := filepath.Join(dirName, "Chart.yaml")
 	if _, err := os.Stat(chartYaml); os.IsNotExist(err) {
-		return false, fmt.Errorf("no Chart.yaml exists in directory %q", dirName)
+		return false, errors.Errorf("no Chart.yaml exists in directory %q", dirName)
 	}
 
 	chartYamlContent, err := ioutil.ReadFile(chartYaml)
 	if err != nil {
-		return false, fmt.Errorf("cannot read Chart.Yaml in directory %q", dirName)
+		return false, errors.Errorf("cannot read Chart.Yaml in directory %q", dirName)
 	}
 
 	chartContent, err := UnmarshalChartfile(chartYamlContent)

pkg/chartutil/create.go

@@ -22,6 +22,8 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi/chart"
 )
 
@@ -291,10 +293,10 @@ Create chart name and version as used by the chart label.
 `
 
 // CreateFrom creates a new chart, but scaffolds it from the src chart.
-func CreateFrom(chartfile *chart.Metadata, dest string, src string) error {
+func CreateFrom(chartfile *chart.Metadata, dest, src string) error {
 	schart, err := Load(src)
 	if err != nil {
-		return fmt.Errorf("could not load %s: %s", src, err)
+		return errors.Wrapf(err, "could not load %s", src)
 	}
 
 	schart.Metadata = chartfile
@@ -334,13 +336,13 @@ func Create(chartfile *chart.Metadata, dir string) (string, error) {
 	if fi, err := os.Stat(path); err != nil {
 		return path, err
 	} else if !fi.IsDir() {
-		return path, fmt.Errorf("no such directory %s", path)
+		return path, errors.Errorf("no such directory %s", path)
 	}
 
 	n := chartfile.Name
 	cdir := filepath.Join(path, n)
 	if fi, err := os.Stat(cdir); err == nil && !fi.IsDir() {
-		return cdir, fmt.Errorf("file %s already exists and is not a directory", cdir)
+		return cdir, errors.Errorf("file %s already exists and is not a directory", cdir)
 	}
 	if err := os.MkdirAll(cdir, 0755); err != nil {
 		return cdir, err

pkg/chartutil/load.go

@@ -20,14 +20,14 @@ import (
 	"archive/tar"
 	"bytes"
 	"compress/gzip"
-	"errors"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi/chart"
 	"k8s.io/helm/pkg/ignore"
 	"k8s.io/helm/pkg/sympath"
@@ -169,7 +169,7 @@ func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
 		} else if filepath.Ext(n) == ".tgz" {
 			file := files[0]
 			if file.Name != n {
-				return c, fmt.Errorf("error unpacking tar in %s: expected %s, got %s", c.Metadata.Name, n, file.Name)
+				return c, errors.Errorf("error unpacking tar in %s: expected %s, got %s", c.Metadata.Name, n, file.Name)
 			}
 			// Untar the chart and add to c.Dependencies
 			b := bytes.NewBuffer(file.Data)
@@ -190,7 +190,7 @@ func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
 		}
 
 		if err != nil {
-			return c, fmt.Errorf("error unpacking %s in %s: %s", n, c.Metadata.Name, err)
+			return c, errors.Wrapf(err, "error unpacking %s in %s", n, c.Metadata.Name)
 		}
 
 		c.Dependencies = append(c.Dependencies, sc)
@@ -272,7 +272,7 @@ func LoadDir(dir string) (*chart.Chart, error) {
 
 		data, err := ioutil.ReadFile(name)
 		if err != nil {
-			return fmt.Errorf("error reading %s: %s", n, err)
+			return errors.Wrapf(err, "error reading %s", n)
 		}
 
 		files = append(files, &BufferedFile{Name: n, Data: data})

pkg/chartutil/requirements.go

@@ -16,12 +16,12 @@ limitations under the License.
 package chartutil
 
 import (
-	"errors"
 	"log"
 	"strings"
 	"time"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/hapi/chart"
 	"k8s.io/helm/pkg/version"

pkg/chartutil/save.go

@@ -19,13 +19,13 @@ package chartutil
 import (
 	"archive/tar"
 	"compress/gzip"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/hapi/chart"
 )
@@ -105,7 +105,7 @@ func Save(c *chart.Chart, outDir string) (string, error) {
 	if fi, err := os.Stat(outDir); err != nil {
 		return "", err
 	} else if !fi.IsDir() {
-		return "", fmt.Errorf("location %s is not a directory", outDir)
+		return "", errors.Errorf("location %s is not a directory", outDir)
 	}
 
 	if c.Metadata == nil {
@@ -126,7 +126,7 @@ func Save(c *chart.Chart, outDir string) (string, error) {
 			return "", err
 		}
 	} else if !stat.IsDir() {
-		return "", fmt.Errorf("is not a directory: %s", filepath.Dir(filename))
+		return "", errors.Errorf("is not a directory: %s", filepath.Dir(filename))
 	}
 
 	f, err := os.Create(filename)

pkg/chartutil/transform.go

@@ -20,6 +20,6 @@ import "strings"
 
 // Transform performs a string replacement of the specified source for
 // a given key with the replacement string
-func Transform(src string, key string, replacement string) []byte {
+func Transform(src, key, replacement string) []byte {
 	return []byte(strings.Replace(src, key, replacement, -1))
 }

pkg/chartutil/values.go

@@ -17,8 +17,6 @@ limitations under the License.
 package chartutil
 
 import (
-	"errors"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"log"
@@ -26,6 +24,7 @@ import (
 	"time"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/hapi/chart"
 )
@@ -98,7 +97,7 @@ func (v Values) Encode(w io.Writer) error {
 func tableLookup(v Values, simple string) (Values, error) {
 	v2, ok := v[simple]
 	if !ok {
-		return v, ErrNoTable(fmt.Errorf("no table named %q (%v)", simple, v))
+		return v, ErrNoTable(errors.Errorf("no table named %q (%v)", simple, v))
 	}
 	if vv, ok := v2.(map[string]interface{}); ok {
 		return vv, nil
@@ -111,7 +110,7 @@ func tableLookup(v Values, simple string) (Values, error) {
 		return vv, nil
 	}
 
-	var e ErrNoTable = fmt.Errorf("no table named %q", simple)
+	var e ErrNoTable = errors.Errorf("no table named %q", simple)
 	return map[string]interface{}{}, e
 }
 
@@ -182,7 +181,7 @@ func coalesceDeps(chrt *chart.Chart, dest map[string]interface{}) (map[string]in
 			// If dest doesn't already have the key, create it.
 			dest[subchart.Metadata.Name] = map[string]interface{}{}
 		} else if !istable(c) {
-			return dest, fmt.Errorf("type mismatch on %s: %t", subchart.Metadata.Name, c)
+			return dest, errors.Errorf("type mismatch on %s: %t", subchart.Metadata.Name, c)
 		}
 		if dv, ok := dest[subchart.Metadata.Name]; ok {
 			dvmap := dv.(map[string]interface{})
@@ -276,7 +275,7 @@ func coalesceValues(c *chart.Chart, v map[string]interface{}) (map[string]interf
 		// On error, we return just the overridden values.
 		// FIXME: We should log this error. It indicates that the YAML data
 		// did not parse.
-		return v, fmt.Errorf("error reading default values (%s): %s", c.Values, err)
+		return v, errors.Wrapf(err, "error reading default values (%s)", c.Values)
 	}
 
 	for key, val := range nv {
@@ -410,7 +409,7 @@ func (v Values) PathValue(ypath string) (interface{}, error) {
 			return vals[yps[0]], nil
 		}
 		// key not found
-		return nil, ErrNoValue(fmt.Errorf("%v is not a value", k))
+		return nil, ErrNoValue(errors.Errorf("%v is not a value", k))
 	}
 	// join all elements of YAML path except last to get string table path
 	ypsLen := len(yps)
@@ -422,7 +421,7 @@ func (v Values) PathValue(ypath string) (interface{}, error) {
 	t, err := v.Table(st)
 	if err != nil {
 		//no table
-		return nil, ErrNoValue(fmt.Errorf("%v is not a value", sk))
+		return nil, ErrNoValue(errors.Errorf("%v is not a value", sk))
 	}
 	// check table for key and ensure value is not a table
 	if k, ok := t[sk]; ok && !istable(k) {
@@ -431,5 +430,5 @@ func (v Values) PathValue(ypath string) (interface{}, error) {
 	}
 
 	// key not found
-	return nil, ErrNoValue(fmt.Errorf("key not found: %s", sk))
+	return nil, ErrNoValue(errors.Errorf("key not found: %s", sk))
 }

pkg/downloader/chart_downloader.go

@@ -16,7 +16,6 @@ limitations under the License.
 package downloader
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -25,6 +24,8 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/getter"
 	"k8s.io/helm/pkg/helm/helmpath"
 	"k8s.io/helm/pkg/provenance"
@@ -107,7 +108,7 @@ func (c *ChartDownloader) DownloadTo(ref, version, dest string) (string, *proven
 		body, err := r.Client.Get(u.String() + ".prov")
 		if err != nil {
 			if c.Verify == VerifyAlways {
-				return destfile, ver, fmt.Errorf("Failed to fetch provenance %q", u.String()+".prov")
+				return destfile, ver, errors.Errorf("failed to fetch provenance %q", u.String()+".prov")
 			}
 			fmt.Fprintf(c.Out, "WARNING: Verification not found for %s: %s\n", ref, err)
 			return destfile, ver, nil
@@ -155,7 +156,7 @@ func (c *ChartDownloader) ResolveChartVersion(ref, version string) (*url.URL, ge
 func (c *ChartDownloader) ResolveChartVersionAndGetRepo(ref, version string) (*url.URL, *repo.ChartRepository, *getter.HttpGetter, error) {
 	u, err := url.Parse(ref)
 	if err != nil {
-		return nil, nil, nil, fmt.Errorf("invalid chart URL format: %s", ref)
+		return nil, nil, nil, errors.Errorf("invalid chart URL format: %s", ref)
 	}
 
 	rf, err := repo.LoadRepositoriesFile(c.HelmHome.RepositoryFile())
@@ -196,7 +197,7 @@ func (c *ChartDownloader) ResolveChartVersionAndGetRepo(ref, version string) (*u
 	// See if it's of the form: repo/path_to_chart
 	p := strings.SplitN(u.Path, "/", 2)
 	if len(p) < 2 {
-		return u, nil, nil, fmt.Errorf("Non-absolute URLs should be in form of repo_name/path_to_chart, got: %s", u)
+		return u, nil, nil, errors.Errorf("non-absolute URLs should be in form of repo_name/path_to_chart, got: %s", u)
 	}
 
 	repoName := p[0]
@@ -216,22 +217,22 @@ func (c *ChartDownloader) ResolveChartVersionAndGetRepo(ref, version string) (*u
 	// Next, we need to load the index, and actually look up the chart.
 	i, err := repo.LoadIndexFile(c.HelmHome.CacheIndex(r.Config.Name))
 	if err != nil {
-		return u, r, g, fmt.Errorf("no cached repo found. (try 'helm repo update'). %s", err)
+		return u, r, g, errors.Wrap(err, "no cached repo found. (try 'helm repo update')")
 	}
 
 	cv, err := i.Get(chartName, version)
 	if err != nil {
-		return u, r, g, fmt.Errorf("chart %q matching %s not found in %s index. (try 'helm repo update'). %s", chartName, version, r.Config.Name, err)
+		return u, r, g, errors.Wrapf(err, "chart %q matching %s not found in %s index. (try 'helm repo update')", chartName, version, r.Config.Name)
 	}
 
 	if len(cv.URLs) == 0 {
-		return u, r, g, fmt.Errorf("chart %q has no downloadable URLs", ref)
+		return u, r, g, errors.Errorf("chart %q has no downloadable URLs", ref)
 	}
 
 	// TODO: Seems that picking first URL is not fully correct
 	u, err = url.Parse(cv.URLs[0])
 	if err != nil {
-		return u, r, g, fmt.Errorf("invalid chart URL format: %s", ref)
+		return u, r, g, errors.Errorf("invalid chart URL format: %s", ref)
 	}
 
 	// If the URL is relative (no scheme), prepend the chart repo's base URL
@@ -277,7 +278,7 @@ func (c *ChartDownloader) getRepoCredentials(r *repo.ChartRepository) (username,
 //
 // It assumes that a chart archive file is accompanied by a provenance file whose
 // name is the archive file name plus the ".prov" extension.
-func VerifyChart(path string, keyring string) (*provenance.Verification, error) {
+func VerifyChart(path, keyring string) (*provenance.Verification, error) {
 	// For now, error out if it's not a tar file.
 	if fi, err := os.Stat(path); err != nil {
 		return nil, err
@@ -289,12 +290,12 @@ func VerifyChart(path string, keyring string) (*provenance.Verification, error)
 
 	provfile := path + ".prov"
 	if _, err := os.Stat(provfile); err != nil {
-		return nil, fmt.Errorf("could not load provenance file %s: %s", provfile, err)
+		return nil, errors.Wrapf(err, "could not load provenance file %s", provfile)
 	}
 
 	sig, err := provenance.NewFromKeyring(keyring, "")
 	if err != nil {
-		return nil, fmt.Errorf("failed to load keyring: %s", err)
+		return nil, errors.Wrap(err, "failed to load keyring")
 	}
 	return sig.Verify(path, provfile)
 }
@@ -311,12 +312,12 @@ func pickChartRepositoryConfigByName(name string, cfgs []*repo.Entry) (*repo.Ent
 	for _, rc := range cfgs {
 		if rc.Name == name {
 			if rc.URL == "" {
-				return nil, fmt.Errorf("no URL found for repository %s", name)
+				return nil, errors.Errorf("no URL found for repository %s", name)
 			}
 			return rc, nil
 		}
 	}
-	return nil, fmt.Errorf("repo %s not found", name)
+	return nil, errors.Errorf("repo %s not found", name)
 }
 
 // scanReposForURL scans all repos to find which repo contains the given URL.
@@ -348,7 +349,7 @@ func (c *ChartDownloader) scanReposForURL(u string, rf *repo.RepoFile) (*repo.En
 
 		i, err := repo.LoadIndexFile(c.HelmHome.CacheIndex(r.Config.Name))
 		if err != nil {
-			return nil, fmt.Errorf("no cached repo found. (try 'helm repo update'). %s", err)
+			return nil, errors.Wrap(err, "no cached repo found. (try 'helm repo update')")
 		}
 
 		for _, entry := range i.Entries {

pkg/downloader/manager.go

@@ -16,7 +16,6 @@ limitations under the License.
 package downloader
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -29,6 +28,7 @@ import (
 
 	"github.com/Masterminds/semver"
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/getter"
@@ -80,10 +80,10 @@ func (m *Manager) Build() error {
 	// A lock must accompany a requirements.yaml file.
 	req, err := chartutil.LoadRequirements(c)
 	if err != nil {
-		return fmt.Errorf("requirements.yaml cannot be opened: %s", err)
+		return errors.Wrap(err, "requirements.yaml cannot be opened")
 	}
 	if sum, err := resolver.HashReq(req); err != nil || sum != lock.Digest {
-		return fmt.Errorf("requirements.lock is out of sync with requirements.yaml")
+		return errors.New("requirements.lock is out of sync with requirements.yaml")
 	}
 
 	// Check that all of the repos we're dependent on actually exist.
@@ -172,7 +172,7 @@ func (m *Manager) Update() error {
 
 func (m *Manager) loadChartDir() (*chart.Chart, error) {
 	if fi, err := os.Stat(m.ChartPath); err != nil {
-		return nil, fmt.Errorf("could not find %s: %s", m.ChartPath, err)
+		return nil, errors.Wrapf(err, "could not find %s", m.ChartPath)
 	} else if !fi.IsDir() {
 		return nil, errors.New("only unpacked charts can be updated")
 	}
@@ -206,11 +206,11 @@ func (m *Manager) downloadAll(deps []*chartutil.Dependency) error {
 			return err
 		}
 	} else if !fi.IsDir() {
-		return fmt.Errorf("%q is not a directory", destPath)
+		return errors.Errorf("%q is not a directory", destPath)
 	}
 
 	if err := os.Rename(destPath, tmpPath); err != nil {
-		return fmt.Errorf("Unable to move current charts to tmp dir: %v", err)
+		return errors.Wrap(err, "unable to move current charts to tmp dir")
 	}
 
 	if err := os.MkdirAll(destPath, 0755); err != nil {
@@ -239,7 +239,7 @@ func (m *Manager) downloadAll(deps []*chartutil.Dependency) error {
 		// https://github.com/kubernetes/helm/issues/1439
 		churl, username, password, err := findChartURL(dep.Name, dep.Version, dep.Repository, repos)
 		if err != nil {
-			saveError = fmt.Errorf("could not find %s: %s", churl, err)
+			saveError = errors.Wrapf(err, "could not find %s", churl)
 			break
 		}
 
@@ -254,7 +254,7 @@ func (m *Manager) downloadAll(deps []*chartutil.Dependency) error {
 		}
 
 		if _, _, err := dl.DownloadTo(churl, "", destPath); err != nil {
-			saveError = fmt.Errorf("could not download %s: %s", churl, err)
+			saveError = errors.Wrapf(err, "could not download %s", churl)
 			break
 		}
 	}
@@ -270,7 +270,7 @@ func (m *Manager) downloadAll(deps []*chartutil.Dependency) error {
 			return err
 		}
 		if err := os.RemoveAll(tmpPath); err != nil {
-			return fmt.Errorf("Failed to remove %v: %v", tmpPath, err)
+			return errors.Wrapf(err, "failed to remove %v", tmpPath)
 		}
 	} else {
 		fmt.Fprintln(m.Out, "Save error occurred: ", saveError)
@@ -281,10 +281,10 @@ func (m *Manager) downloadAll(deps []*chartutil.Dependency) error {
 			}
 		}
 		if err := os.RemoveAll(destPath); err != nil {
-			return fmt.Errorf("Failed to remove %v: %v", destPath, err)
+			return errors.Wrapf(err, "failed to remove %v", destPath)
 		}
 		if err := os.Rename(tmpPath, destPath); err != nil {
-			return fmt.Errorf("Unable to move current charts to tmp dir: %v", err)
+			return errors.Wrap(err, "unable to move current charts to tmp dir")
 		}
 		return saveError
 	}
@@ -356,7 +356,7 @@ func (m *Manager) hasAllRepos(deps []*chartutil.Dependency) error {
 		}
 	}
 	if len(missing) > 0 {
-		return fmt.Errorf("no repository definition for %s. Please add the missing repos via 'helm repo add'", strings.Join(missing, ", "))
+		return errors.Errorf("no repository definition for %s. Please add the missing repos via 'helm repo add'", strings.Join(missing, ", "))
 	}
 	return nil
 }
@@ -500,7 +500,7 @@ func findChartURL(name, version, repoURL string, repos map[string]*repo.ChartRep
 			return
 		}
 	}
-	err = fmt.Errorf("chart %s not found in %s", name, repoURL)
+	err = errors.Errorf("chart %s not found in %s", name, repoURL)
 	return
 }
 
@@ -556,7 +556,7 @@ func normalizeURL(baseURL, urlOrPath string) (string, error) {
 	}
 	u2, err := url.Parse(baseURL)
 	if err != nil {
-		return urlOrPath, fmt.Errorf("Base URL failed to parse: %s", err)
+		return urlOrPath, errors.Wrap(err, "base URL failed to parse")
 	}
 
 	u2.Path = path.Join(u2.Path, urlOrPath)
@@ -574,7 +574,7 @@ func (m *Manager) loadChartRepositories() (map[string]*repo.ChartRepository, err
 	// Load repositories.yaml file
 	rf, err := repo.LoadRepositoriesFile(repoyaml)
 	if err != nil {
-		return indices, fmt.Errorf("failed to load %s: %s", repoyaml, err)
+		return indices, errors.Wrapf(err, "failed to load %s", repoyaml)
 	}
 
 	for _, re := range rf.Repositories {
@@ -606,11 +606,11 @@ func writeLock(chartpath string, lock *chartutil.RequirementsLock) error {
 }
 
 // archive a dep chart from local directory and save it into charts/
-func tarFromLocalDir(chartpath string, name string, repo string, version string) (string, error) {
+func tarFromLocalDir(chartpath, name, repo, version string) (string, error) {
 	destPath := filepath.Join(chartpath, "charts")
 
 	if !strings.HasPrefix(repo, "file://") {
-		return "", fmt.Errorf("wrong format: chart %s repository %s", name, repo)
+		return "", errors.Errorf("wrong format: chart %s repository %s", name, repo)
 	}
 
 	origPath, err := resolver.GetLocalPath(repo, chartpath)
@@ -625,7 +625,7 @@ func tarFromLocalDir(chartpath string, name string, repo string, version string)
 
 	constraint, err := semver.NewConstraint(version)
 	if err != nil {
-		return "", fmt.Errorf("dependency %s has an invalid version/constraint format: %s", name, err)
+		return "", errors.Wrapf(err, "dependency %s has an invalid version/constraint format", name)
 	}
 
 	v, err := semver.NewVersion(ch.Metadata.Version)
@@ -638,7 +638,7 @@ func tarFromLocalDir(chartpath string, name string, repo string, version string)
 		return ch.Metadata.Version, err
 	}
 
-	return "", fmt.Errorf("can't get a valid version for dependency %s", name)
+	return "", errors.Errorf("can't get a valid version for dependency %s", name)
 }
 
 // move files from tmppath to destpath
@@ -649,7 +649,7 @@ func move(tmpPath, destPath string) error {
 		tmpfile := filepath.Join(tmpPath, filename)
 		destfile := filepath.Join(destPath, filename)
 		if err := os.Rename(tmpfile, destfile); err != nil {
-			return fmt.Errorf("Unable to move local charts to charts dir: %v", err)
+			return errors.Wrap(err, "unable to move local charts to charts dir")
 		}
 	}
 	return nil

pkg/engine/engine.go

@@ -18,13 +18,13 @@ package engine
 
 import (
 	"bytes"
-	"fmt"
 	"path"
 	"sort"
 	"strings"
 	"text/template"
 
 	"github.com/Masterminds/sprig"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi/chart"
@@ -155,10 +155,10 @@ func (e *Engine) alterFuncMap(t *template.Template) template.FuncMap {
 	// Add the 'required' function here
 	funcMap["required"] = func(warn string, val interface{}) (interface{}, error) {
 		if val == nil {
-			return val, fmt.Errorf(warn)
+			return val, errors.Errorf(warn)
 		} else if _, ok := val.(string); ok {
 			if val == "" {
-				return val, fmt.Errorf(warn)
+				return val, errors.Errorf(warn)
 			}
 		}
 		return val, nil
@@ -168,7 +168,7 @@ func (e *Engine) alterFuncMap(t *template.Template) template.FuncMap {
 	funcMap["tpl"] = func(tpl string, vals chartutil.Values) (string, error) {
 		basePath, err := vals.PathValue("Template.BasePath")
 		if err != nil {
-			return "", fmt.Errorf("Cannot retrieve Template.Basepath from values inside tpl function: %s (%s)", tpl, err.Error())
+			return "", errors.Wrapf(err, "cannot retrieve Template.Basepath from values inside tpl function: %s", tpl)
 		}
 
 		r := renderable{
@@ -180,14 +180,14 @@ func (e *Engine) alterFuncMap(t *template.Template) template.FuncMap {
 		templates := map[string]renderable{}
 		templateName, err := vals.PathValue("Template.Name")
 		if err != nil {
-			return "", fmt.Errorf("Cannot retrieve Template.Name from values inside tpl function: %s (%s)", tpl, err.Error())
+			return "", errors.Wrapf(err, "cannot retrieve Template.Name from values inside tpl function: %s", tpl)
 		}
 
 		templates[templateName.(string)] = r
 
 		result, err := e.render(templates)
 		if err != nil {
-			return "", fmt.Errorf("Error during tpl function execution for %q: %s", tpl, err.Error())
+			return "", errors.Wrapf(err, "error during tpl function execution for %q", tpl)
 		}
 		return result[templateName.(string)], nil
 	}
@@ -206,7 +206,7 @@ func (e *Engine) render(tpls map[string]renderable) (rendered map[string]string,
 	// template engine.
 	defer func() {
 		if r := recover(); r != nil {
-			err = fmt.Errorf("rendering template failed: %v", r)
+			err = errors.Errorf("rendering template failed: %v", r)
 		}
 	}()
 	t := template.New("gotpl")
@@ -230,7 +230,7 @@ func (e *Engine) render(tpls map[string]renderable) (rendered map[string]string,
 		r := tpls[fname]
 		t = t.New(fname).Funcs(funcMap)
 		if _, err := t.Parse(r.tpl); err != nil {
-			return map[string]string{}, fmt.Errorf("parse error in %q: %s", fname, err)
+			return map[string]string{}, errors.Wrapf(err, "parse error in %q", fname)
 		}
 		files = append(files, fname)
 	}
@@ -241,7 +241,7 @@ func (e *Engine) render(tpls map[string]renderable) (rendered map[string]string,
 		if t.Lookup(fname) == nil {
 			t = t.New(fname).Funcs(funcMap)
 			if _, err := t.Parse(r.tpl); err != nil {
-				return map[string]string{}, fmt.Errorf("parse error in %q: %s", fname, err)
+				return map[string]string{}, errors.Wrapf(err, "parse error in %q", fname)
 			}
 		}
 	}
@@ -258,7 +258,7 @@ func (e *Engine) render(tpls map[string]renderable) (rendered map[string]string,
 		vals := tpls[file].vals
 		vals["Template"] = map[string]interface{}{"Name": file, "BasePath": tpls[file].basePath}
 		if err := t.ExecuteTemplate(&buf, file, vals); err != nil {
-			return map[string]string{}, fmt.Errorf("render error in %q: %s", file, err)
+			return map[string]string{}, errors.Wrapf(err, "render error in %q", file)
 		}
 
 		// Work around the issue where Go will emit "<no value>" even if Options(missing=zero)

pkg/getter/getter.go

@@ -18,7 +18,8 @@ package getter
 
 import (
 	"bytes"
-	"fmt"
+
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/helm/environment"
 )
@@ -64,7 +65,7 @@ func (p Providers) ByScheme(scheme string) (Constructor, error) {
 			return pp.New, nil
 		}
 	}
-	return nil, fmt.Errorf("scheme %q not supported", scheme)
+	return nil, errors.Errorf("scheme %q not supported", scheme)
 }
 
 // All finds all of the registered getters as a list of Provider instances.
@@ -94,5 +95,5 @@ func ByScheme(scheme string, settings environment.EnvSettings) (Provider, error)
 			return p, nil
 		}
 	}
-	return Provider{}, fmt.Errorf("scheme %q not supported", scheme)
+	return Provider{}, errors.Errorf("scheme %q not supported", scheme)
 }

pkg/getter/httpgetter.go

@@ -17,11 +17,12 @@ package getter
 
 import (
 	"bytes"
-	"fmt"
 	"io"
 	"net/http"
 	"strings"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/tlsutil"
 	"k8s.io/helm/pkg/urlutil"
 	"k8s.io/helm/pkg/version"
@@ -66,7 +67,7 @@ func (g *HttpGetter) get(href string) (*bytes.Buffer, error) {
 		return buf, err
 	}
 	if resp.StatusCode != 200 {
-		return buf, fmt.Errorf("Failed to fetch %s : %s", href, resp.Status)
+		return buf, errors.Errorf("failed to fetch %s : %s", href, resp.Status)
 	}
 
 	_, err = io.Copy(buf, resp.Body)
@@ -85,7 +86,7 @@ func NewHTTPGetter(URL, CertFile, KeyFile, CAFile string) (*HttpGetter, error) {
 	if CertFile != "" && KeyFile != "" {
 		tlsConf, err := tlsutil.NewClientTLS(CertFile, KeyFile, CAFile)
 		if err != nil {
-			return &client, fmt.Errorf("can't create TLS config for client: %s", err.Error())
+			return &client, errors.Wrap(err, "can't create TLS config for client")
 		}
 		tlsConf.BuildNameToCertificate()
 

pkg/getter/plugingetter.go

@@ -17,11 +17,12 @@ package getter
 
 import (
 	"bytes"
-	"fmt"
 	"os"
 	"os/exec"
 	"path/filepath"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/helm/environment"
 	"k8s.io/helm/pkg/plugin"
 )
@@ -72,7 +73,7 @@ func (p *pluginGetter) Get(href string) (*bytes.Buffer, error) {
 	if err := prog.Run(); err != nil {
 		if eerr, ok := err.(*exec.ExitError); ok {
 			os.Stderr.Write(eerr.Stderr)
-			return nil, fmt.Errorf("plugin %q exited with error", p.command)
+			return nil, errors.Errorf("plugin %q exited with error", p.command)
 		}
 		return nil, err
 	}

pkg/helm/client.go

@@ -134,7 +134,7 @@ func (c *Client) DeleteRelease(rlsName string, opts ...DeleteOption) (*hapi.Unin
 }
 
 // UpdateRelease loads a chart from chstr and updates a release to a new/different chart.
-func (c *Client) UpdateRelease(rlsName string, chstr string, opts ...UpdateOption) (*release.Release, error) {
+func (c *Client) UpdateRelease(rlsName, chstr string, opts ...UpdateOption) (*release.Release, error) {
 	// load the chart to update
 	chart, err := chartutil.Load(chstr)
 	if err != nil {

pkg/helm/fake.go

@@ -17,12 +17,12 @@ limitations under the License.
 package helm // import "k8s.io/helm/pkg/helm"
 
 import (
-	"errors"
-	"fmt"
 	"math/rand"
 	"sync"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/chart"
 	"k8s.io/helm/pkg/hapi/release"
@@ -88,11 +88,11 @@ func (c *FakeClient) DeleteRelease(rlsName string, opts ...DeleteOption) (*hapi.
 		}
 	}
 
-	return nil, fmt.Errorf("No such release: %s", rlsName)
+	return nil, errors.Errorf("no such release: %s", rlsName)
 }
 
 // UpdateRelease returns the updated release, if it exists
-func (c *FakeClient) UpdateRelease(rlsName string, chStr string, opts ...UpdateOption) (*release.Release, error) {
+func (c *FakeClient) UpdateRelease(rlsName, chStr string, opts ...UpdateOption) (*release.Release, error) {
 	return c.UpdateReleaseFromChart(rlsName, &chart.Chart{}, opts...)
 }
 
@@ -118,7 +118,7 @@ func (c *FakeClient) ReleaseStatus(rlsName string, version int) (*hapi.GetReleas
 			}, nil
 		}
 	}
-	return nil, fmt.Errorf("No such release: %s", rlsName)
+	return nil, errors.Errorf("no such release: %s", rlsName)
 }
 
 // ReleaseContent returns the configuration for the matching release name in the fake release client.
@@ -128,7 +128,7 @@ func (c *FakeClient) ReleaseContent(rlsName string, version int) (*release.Relea
 			return rel, nil
 		}
 	}
-	return nil, fmt.Errorf("No such release: %s", rlsName)
+	return nil, errors.Errorf("no such release: %s", rlsName)
 }
 
 // ReleaseHistory returns a release's revision history.

pkg/helm/helm_test.go

@@ -17,11 +17,12 @@ limitations under the License.
 package helm // import "k8s.io/helm/pkg/helm"
 
 import (
-	"errors"
 	"path/filepath"
 	"reflect"
 	"testing"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi"
 	cpb "k8s.io/helm/pkg/hapi/chart"

pkg/ignore/rules.go

@@ -18,12 +18,13 @@ package ignore
 
 import (
 	"bufio"
-	"errors"
 	"io"
 	"log"
 	"os"
 	"path/filepath"
 	"strings"
+
+	"github.com/pkg/errors"
 )
 
 // HelmIgnore default name of an ignorefile.

pkg/kube/client.go

@@ -19,7 +19,6 @@ package kube // import "k8s.io/helm/pkg/kube"
 import (
 	"bytes"
 	"encoding/json"
-	goerrors "errors"
 	"fmt"
 	"io"
 	"log"
@@ -27,6 +26,7 @@ import (
 	"time"
 
 	jsonpatch "github.com/evanphx/json-patch"
+	goerrors "github.com/pkg/errors"
 	appsv1 "k8s.io/api/apps/v1"
 	appsv1beta1 "k8s.io/api/apps/v1beta1"
 	appsv1beta2 "k8s.io/api/apps/v1beta2"
@@ -213,8 +213,7 @@ func (c *Client) Get(namespace string, reader io.Reader) (string, error) {
 		}
 		for _, o := range ot {
 			if err := p.PrintObj(o, buf); err != nil {
-				c.Log("failed to print object type %s, object: %q :\n %v", t, o, err)
-				return "", err
+				return "", goerrors.Wrapf(err, "failed to print object type %s, object: %q", t, o)
 			}
 		}
 		if _, err := buf.WriteString("\n"); err != nil {
@@ -236,16 +235,16 @@ func (c *Client) Get(namespace string, reader io.Reader) (string, error) {
 // not present in the target configuration.
 //
 // Namespace will set the namespaces.
-func (c *Client) Update(namespace string, originalReader, targetReader io.Reader, force bool, recreate bool, timeout int64, shouldWait bool) error {
+func (c *Client) Update(namespace string, originalReader, targetReader io.Reader, force, recreate bool, timeout int64, shouldWait bool) error {
 	original, err := c.BuildUnstructured(namespace, originalReader)
 	if err != nil {
-		return fmt.Errorf("failed decoding reader into objects: %s", err)
+		return goerrors.Wrap(err, "failed decoding reader into objects")
 	}
 
 	c.Log("building resources from updated manifest")
 	target, err := c.BuildUnstructured(namespace, targetReader)
 	if err != nil {
-		return fmt.Errorf("failed decoding reader into objects: %s", err)
+		return goerrors.Wrap(err, "failed decoding reader into objects")
 	}
 
 	updateErrors := []string{}
@@ -259,12 +258,12 @@ func (c *Client) Update(namespace string, originalReader, targetReader io.Reader
 		helper := resource.NewHelper(info.Client, info.Mapping)
 		if _, err := helper.Get(info.Namespace, info.Name, info.Export); err != nil {
 			if !errors.IsNotFound(err) {
-				return fmt.Errorf("Could not get information about the resource: %s", err)
+				return goerrors.Wrap(err, "could not get information about the resource")
 			}
 
 			// Since the resource does not exist, create it.
 			if err := createResource(info); err != nil {
-				return fmt.Errorf("failed to create resource: %s", err)
+				return goerrors.Wrap(err, "failed to create resource")
 			}
 
 			kind := info.Mapping.GroupVersionKind.Kind
@@ -275,7 +274,7 @@ func (c *Client) Update(namespace string, originalReader, targetReader io.Reader
 		originalInfo := original.Get(info)
 		if originalInfo == nil {
 			kind := info.Mapping.GroupVersionKind.Kind
-			return fmt.Errorf("no %s with the name %q found", kind, info.Name)
+			return goerrors.Errorf("no %s with the name %q found", kind, info.Name)
 		}
 
 		if err := updateResource(c, info, originalInfo.Object, force, recreate); err != nil {
@@ -290,7 +289,7 @@ func (c *Client) Update(namespace string, originalReader, targetReader io.Reader
 	case err != nil:
 		return err
 	case len(updateErrors) != 0:
-		return fmt.Errorf(strings.Join(updateErrors, " && "))
+		return goerrors.Errorf(strings.Join(updateErrors, " && "))
 	}
 
 	for _, info := range original.Difference(target) {
@@ -393,11 +392,11 @@ func deleteResource(c *Client, info *resource.Info) error {
 func createPatch(target *resource.Info, current runtime.Object) ([]byte, types.PatchType, error) {
 	oldData, err := json.Marshal(current)
 	if err != nil {
-		return nil, types.StrategicMergePatchType, fmt.Errorf("serializing current configuration: %s", err)
+		return nil, types.StrategicMergePatchType, goerrors.Wrap(err, "serializing current configuration")
 	}
 	newData, err := json.Marshal(target.Object)
 	if err != nil {
-		return nil, types.StrategicMergePatchType, fmt.Errorf("serializing target configuration: %s", err)
+		return nil, types.StrategicMergePatchType, goerrors.Wrap(err, "serializing target configuration")
 	}
 
 	// While different objects need different merge types, the parent function
@@ -423,24 +422,24 @@ func createPatch(target *resource.Info, current runtime.Object) ([]byte, types.P
 		patch, err := jsonpatch.CreateMergePatch(oldData, newData)
 		return patch, types.MergePatchType, err
 	case err != nil:
-		return nil, types.StrategicMergePatchType, fmt.Errorf("failed to get versionedObject: %s", err)
+		return nil, types.StrategicMergePatchType, goerrors.Wrap(err, "failed to get versionedObject")
 	default:
 		patch, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, versionedObject)
 		return patch, types.StrategicMergePatchType, err
 	}
 }
 
-func updateResource(c *Client, target *resource.Info, currentObj runtime.Object, force bool, recreate bool) error {
+func updateResource(c *Client, target *resource.Info, currentObj runtime.Object, force, recreate bool) error {
 	patch, patchType, err := createPatch(target, currentObj)
 	if err != nil {
-		return fmt.Errorf("failed to create patch: %s", err)
+		return goerrors.Wrap(err, "failed to create patch")
 	}
 	if patch == nil {
 		c.Log("Looks like there are no changes for %s %q", target.Mapping.GroupVersionKind.Kind, target.Name)
 		// This needs to happen to make sure that tiller has the latest info from the API
 		// Otherwise there will be no labels and other functions that use labels will panic
 		if err := target.Get(); err != nil {
-			return fmt.Errorf("error trying to refresh resource information: %v", err)
+			return goerrors.Wrap(err, "error trying to refresh resource information")
 		}
 	} else {
 		// send patch to server
@@ -460,7 +459,7 @@ func updateResource(c *Client, target *resource.Info, currentObj runtime.Object,
 
 				// ... and recreate
 				if err := createResource(target); err != nil {
-					return fmt.Errorf("Failed to recreate resource: %s", err)
+					return goerrors.Wrap(err, "failed to recreate resource")
 				}
 				log.Printf("Created a new %s called %q\n", kind, target.Name)
 
@@ -557,7 +556,7 @@ func getSelectorFromObject(obj runtime.Object) (map[string]string, error) {
 		return typed.Spec.Selector.MatchLabels, nil
 
 	default:
-		return nil, fmt.Errorf("Unsupported kind when getting selector: %v", obj)
+		return nil, goerrors.Errorf("unsupported kind when getting selector: %v", obj)
 	}
 }
 
@@ -594,7 +593,7 @@ func (c *Client) watchUntilReady(timeout time.Duration, info *resource.Info) err
 		case watch.Error:
 			// Handle error and return with an error.
 			c.Log("Error event for %s", info.Name)
-			return true, fmt.Errorf("Failed to deploy %s", info.Name)
+			return true, goerrors.Errorf("failed to deploy %s", info.Name)
 		default:
 			return false, nil
 		}
@@ -608,14 +607,14 @@ func (c *Client) watchUntilReady(timeout time.Duration, info *resource.Info) err
 func (c *Client) waitForJob(e watch.Event, name string) (bool, error) {
 	o, ok := e.Object.(*batchinternal.Job)
 	if !ok {
-		return true, fmt.Errorf("Expected %s to be a *batch.Job, got %T", name, e.Object)
+		return true, goerrors.Errorf("expected %s to be a *batch.Job, got %T", name, e.Object)
 	}
 
 	for _, c := range o.Status.Conditions {
 		if c.Type == batchinternal.JobComplete && c.Status == core.ConditionTrue {
 			return true, nil
 		} else if c.Type == batchinternal.JobFailed && c.Status == core.ConditionTrue {
-			return true, fmt.Errorf("Job failed: %s", c.Reason)
+			return true, goerrors.Errorf("job failed: %s", c.Reason)
 		}
 	}
 
@@ -647,7 +646,7 @@ func (c *Client) WaitAndGetCompletedPodPhase(namespace string, reader io.Reader,
 
 	kind := info.Mapping.GroupVersionKind.Kind
 	if kind != "Pod" {
-		return core.PodUnknown, fmt.Errorf("%s is not a Pod", info.Name)
+		return core.PodUnknown, goerrors.Errorf("%s is not a Pod", info.Name)
 	}
 
 	if err := c.watchPodUntilComplete(timeout, info); err != nil {

pkg/lint/rules/chartfile.go

@@ -17,14 +17,12 @@ limitations under the License.
 package rules // import "k8s.io/helm/pkg/lint/rules"
 
 import (
-	"errors"
-	"fmt"
 	"os"
 	"path/filepath"
 
 	"github.com/Masterminds/semver"
-
 	"github.com/asaskevich/govalidator"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi/chart"
@@ -68,7 +66,7 @@ func validateChartYamlNotDirectory(chartPath string) error {
 
 func validateChartYamlFormat(chartFileError error) error {
 	if chartFileError != nil {
-		return fmt.Errorf("unable to parse YAML\n\t%s", chartFileError.Error())
+		return errors.Errorf("unable to parse YAML\n\t%s", chartFileError.Error())
 	}
 	return nil
 }
@@ -82,7 +80,7 @@ func validateChartName(cf *chart.Metadata) error {
 
 func validateChartNameDirMatch(chartDir string, cf *chart.Metadata) error {
 	if cf.Name != filepath.Base(chartDir) {
-		return fmt.Errorf("directory name (%s) and chart name (%s) must be the same", filepath.Base(chartDir), cf.Name)
+		return errors.Errorf("directory name (%s) and chart name (%s) must be the same", filepath.Base(chartDir), cf.Name)
 	}
 	return nil
 }
@@ -95,7 +93,7 @@ func validateChartVersion(cf *chart.Metadata) error {
 	version, err := semver.NewVersion(cf.Version)
 
 	if err != nil {
-		return fmt.Errorf("version '%s' is not a valid SemVer", cf.Version)
+		return errors.Errorf("version '%s' is not a valid SemVer", cf.Version)
 	}
 
 	c, err := semver.NewConstraint("> 0")
@@ -105,7 +103,7 @@ func validateChartVersion(cf *chart.Metadata) error {
 	valid, msg := c.Validate(version)
 
 	if !valid && len(msg) > 0 {
-		return fmt.Errorf("version %v", msg[0])
+		return errors.Errorf("version %v", msg[0])
 	}
 
 	return nil
@@ -116,9 +114,9 @@ func validateChartMaintainer(cf *chart.Metadata) error {
 		if maintainer.Name == "" {
 			return errors.New("each maintainer requires a name")
 		} else if maintainer.Email != "" && !govalidator.IsEmail(maintainer.Email) {
-			return fmt.Errorf("invalid email '%s' for maintainer '%s'", maintainer.Email, maintainer.Name)
+			return errors.Errorf("invalid email '%s' for maintainer '%s'", maintainer.Email, maintainer.Name)
 		} else if maintainer.URL != "" && !govalidator.IsURL(maintainer.URL) {
-			return fmt.Errorf("invalid url '%s' for maintainer '%s'", maintainer.URL, maintainer.Name)
+			return errors.Errorf("invalid url '%s' for maintainer '%s'", maintainer.URL, maintainer.Name)
 		}
 	}
 	return nil
@@ -127,7 +125,7 @@ func validateChartMaintainer(cf *chart.Metadata) error {
 func validateChartSources(cf *chart.Metadata) error {
 	for _, source := range cf.Sources {
 		if source == "" || !govalidator.IsRequestURL(source) {
-			return fmt.Errorf("invalid source URL '%s'", source)
+			return errors.Errorf("invalid source URL '%s'", source)
 		}
 	}
 	return nil
@@ -142,7 +140,7 @@ func validateChartIconPresence(cf *chart.Metadata) error {
 
 func validateChartIconURL(cf *chart.Metadata) error {
 	if cf.Icon != "" && !govalidator.IsRequestURL(cf.Icon) {
-		return fmt.Errorf("invalid icon URL '%s'", cf.Icon)
+		return errors.Errorf("invalid icon URL '%s'", cf.Icon)
 	}
 	return nil
 }

pkg/lint/rules/chartfile_test.go

@@ -17,12 +17,13 @@ limitations under the License.
 package rules
 
 import (
-	"errors"
 	"os"
 	"path/filepath"
 	"strings"
 	"testing"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi/chart"
 	"k8s.io/helm/pkg/lint/support"

pkg/lint/rules/template.go

@@ -17,13 +17,12 @@ limitations under the License.
 package rules
 
 import (
-	"errors"
-	"fmt"
 	"os"
 	"path/filepath"
 	"time"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/engine"
@@ -145,14 +144,11 @@ func validateAllowedExtension(fileName string) error {
 		}
 	}
 
-	return fmt.Errorf("file extension '%s' not valid. Valid extensions are .yaml, .yml, .tpl, or .txt", ext)
+	return errors.Errorf("file extension '%s' not valid. Valid extensions are .yaml, .yml, .tpl, or .txt", ext)
 }
 
 func validateYamlContent(err error) error {
-	if err != nil {
-		return fmt.Errorf("unable to parse YAML\n\t%s", err)
-	}
-	return nil
+	return errors.Wrap(err, "unable to parse YAML")
 }
 
 // K8sYamlStruct stubs a Kubernetes YAML file.

pkg/lint/rules/values.go

@@ -17,10 +17,11 @@ limitations under the License.
 package rules
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/lint/support"
 )
@@ -41,15 +42,12 @@ func Values(linter *support.Linter) {
 func validateValuesFileExistence(valuesPath string) error {
 	_, err := os.Stat(valuesPath)
 	if err != nil {
-		return fmt.Errorf("file does not exist")
+		return errors.Errorf("file does not exist")
 	}
 	return nil
 }
 
 func validateValuesFile(valuesPath string) error {
 	_, err := chartutil.ReadValuesFile(valuesPath)
-	if err != nil {
-		return fmt.Errorf("unable to parse YAML\n\t%s", err)
-	}
-	return nil
+	return errors.Wrap(err, "unable to parse YAML")
 }

pkg/lint/support/message_test.go

@@ -17,8 +17,9 @@ limitations under the License.
 package support
 
 import (
-	"errors"
 	"testing"
+
+	"github.com/pkg/errors"
 )
 
 var linter = Linter{}

pkg/plugin/installer/http_installer.go

@@ -19,13 +19,14 @@ import (
 	"archive/tar"
 	"bytes"
 	"compress/gzip"
-	"fmt"
 	"io"
 	"os"
 	"path/filepath"
 	"regexp"
 	"strings"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/getter"
 	"k8s.io/helm/pkg/helm/environment"
 	"k8s.io/helm/pkg/helm/helmpath"
@@ -62,7 +63,7 @@ func NewExtractor(source string) (Extractor, error) {
 			return extractor, nil
 		}
 	}
-	return nil, fmt.Errorf("no extractor implemented yet for %s", source)
+	return nil, errors.Errorf("no extractor implemented yet for %s", source)
 }
 
 // NewHTTPInstaller creates a new HttpInstaller.
@@ -141,7 +142,7 @@ func (i *HTTPInstaller) Install() error {
 // Update updates a local repository
 // Not implemented for now since tarball most likely will be packaged by version
 func (i *HTTPInstaller) Update() error {
-	return fmt.Errorf("method Update() not implemented for HttpInstaller")
+	return errors.Errorf("method Update() not implemented for HttpInstaller")
 }
 
 // Override link because we want to use HttpInstaller.Path() not base.Path()
@@ -200,7 +201,7 @@ func (g *TarGzExtractor) Extract(buffer *bytes.Buffer, targetDir string) error {
 			}
 			outFile.Close()
 		default:
-			return fmt.Errorf("unknown type: %b in %s", header.Typeflag, header.Name)
+			return errors.Errorf("unknown type: %b in %s", header.Typeflag, header.Name)
 		}
 	}
 

pkg/plugin/installer/http_installer_test.go

@@ -18,11 +18,12 @@ package installer // import "k8s.io/helm/pkg/plugin/installer"
 import (
 	"bytes"
 	"encoding/base64"
-	"fmt"
 	"io/ioutil"
 	"os"
 	"testing"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/helm/helmpath"
 )
 
@@ -131,7 +132,7 @@ func TestHTTPInstallerNonExistentVersion(t *testing.T) {
 
 	// inject fake http client responding with error
 	httpInstaller.getter = &TestHTTPGetter{
-		MockError: fmt.Errorf("failed to download plugin for some reason"),
+		MockError: errors.Errorf("failed to download plugin for some reason"),
 	}
 
 	// attempt to install the plugin

pkg/plugin/installer/installer.go

@@ -16,13 +16,14 @@ limitations under the License.
 package installer
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"path"
 	"path/filepath"
 	"strings"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/helm/helmpath"
 )
 

pkg/plugin/installer/local_installer.go

@@ -16,9 +16,10 @@ limitations under the License.
 package installer // import "k8s.io/helm/pkg/plugin/installer"
 
 import (
-	"fmt"
 	"path/filepath"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/helm/helmpath"
 )
 
@@ -31,7 +32,7 @@ type LocalInstaller struct {
 func NewLocalInstaller(source string, home helmpath.Home) (*LocalInstaller, error) {
 	src, err := filepath.Abs(source)
 	if err != nil {
-		return nil, fmt.Errorf("unable to get absolute path to plugin: %v", err)
+		return nil, errors.Wrap(err, "unable to get absolute path to plugin")
 	}
 	i := &LocalInstaller{
 		base: newBase(src, home),

pkg/plugin/installer/vcs_installer.go

@@ -16,13 +16,12 @@ limitations under the License.
 package installer // import "k8s.io/helm/pkg/plugin/installer"
 
 import (
-	"errors"
-	"fmt"
 	"os"
 	"sort"
 
 	"github.com/Masterminds/semver"
 	"github.com/Masterminds/vcs"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/helm/helmpath"
 	"k8s.io/helm/pkg/plugin/cache"
@@ -143,7 +142,7 @@ func (i *VCSInstaller) solveVersion(repo vcs.Repo) (string, error) {
 		}
 	}
 
-	return "", fmt.Errorf("requested version %q does not exist for plugin %q", i.Version, i.Repo.Remote())
+	return "", errors.Errorf("requested version %q does not exist for plugin %q", i.Version, i.Repo.Remote())
 }
 
 // setVersion attempts to checkout the version

pkg/provenance/sign.go

@@ -19,8 +19,6 @@ import (
 	"bytes"
 	"crypto"
 	"encoding/hex"
-	"errors"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
@@ -28,7 +26,7 @@ import (
 	"strings"
 
 	"github.com/ghodss/yaml"
-
+	"github.com/pkg/errors"
 	"golang.org/x/crypto/openpgp"
 	"golang.org/x/crypto/openpgp/clearsign"
 	"golang.org/x/crypto/openpgp/packet"
@@ -142,7 +140,7 @@ func NewFromKeyring(keyringfile, id string) (*Signatory, error) {
 		}
 	}
 	if vague {
-		return s, fmt.Errorf("more than one key contain the id %q", id)
+		return s, errors.Errorf("more than one key contain the id %q", id)
 	}
 
 	s.Entity = candidate
@@ -238,14 +236,14 @@ func (s *Signatory) Verify(chartpath, sigpath string) (*Verification, error) {
 		if fi, err := os.Stat(fname); err != nil {
 			return ver, err
 		} else if fi.IsDir() {
-			return ver, fmt.Errorf("%s cannot be a directory", fname)
+			return ver, errors.Errorf("%s cannot be a directory", fname)
 		}
 	}
 
 	// First verify the signature
 	sig, err := s.decodeSignature(sigpath)
 	if err != nil {
-		return ver, fmt.Errorf("failed to decode signature: %s", err)
+		return ver, errors.Wrap(err, "failed to decode signature")
 	}
 
 	by, err := s.verifySignature(sig)
@@ -267,9 +265,9 @@ func (s *Signatory) Verify(chartpath, sigpath string) (*Verification, error) {
 	sum = "sha256:" + sum
 	basename := filepath.Base(chartpath)
 	if sha, ok := sums.Files[basename]; !ok {
-		return ver, fmt.Errorf("provenance does not contain a SHA for a file named %q", basename)
+		return ver, errors.Errorf("provenance does not contain a SHA for a file named %q", basename)
 	} else if sha != sum {
-		return ver, fmt.Errorf("sha256 sum does not match for %s: %q != %q", basename, sha, sum)
+		return ver, errors.Errorf("sha256 sum does not match for %s: %q != %q", basename, sha, sum)
 	}
 	ver.FileHash = sum
 	ver.FileName = basename

pkg/releasetesting/environment_test.go

@@ -17,9 +17,10 @@ limitations under the License.
 package releasetesting
 
 import (
-	"errors"
 	"testing"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi/release"
 )
 

pkg/releasetesting/test_suite.go

@@ -17,11 +17,11 @@ limitations under the License.
 package releasetesting
 
 import (
-	"fmt"
 	"strings"
 	"time"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 	"k8s.io/kubernetes/pkg/apis/core"
 
 	"k8s.io/helm/pkg/hapi/release"
@@ -141,7 +141,7 @@ func expectedSuccess(hookTypes []string) (bool, error) {
 			return false, nil
 		}
 	}
-	return false, fmt.Errorf("No %s or %s hook found", hooks.ReleaseTestSuccess, hooks.ReleaseTestFailure)
+	return false, errors.Errorf("no %s or %s hook found", hooks.ReleaseTestSuccess, hooks.ReleaseTestFailure)
 }
 
 func extractTestManifestsFromHooks(h []*release.Hook) []string {
@@ -165,7 +165,7 @@ func newTest(testManifest string) (*test, error) {
 	}
 
 	if sh.Kind != "Pod" {
-		return nil, fmt.Errorf("%s is not a pod", sh.Metadata.Name)
+		return nil, errors.Errorf("%s is not a pod", sh.Metadata.Name)
 	}
 
 	hookTypes := sh.Metadata.Annotations[hooks.HookAnno]

pkg/repo/chartrepo.go

@@ -25,6 +25,7 @@ import (
 	"strings"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/getter"
@@ -55,16 +56,16 @@ type ChartRepository struct {
 func NewChartRepository(cfg *Entry, getters getter.Providers) (*ChartRepository, error) {
 	u, err := url.Parse(cfg.URL)
 	if err != nil {
-		return nil, fmt.Errorf("invalid chart URL format: %s", cfg.URL)
+		return nil, errors.Errorf("invalid chart URL format: %s", cfg.URL)
 	}
 
 	getterConstructor, err := getters.ByScheme(u.Scheme)
 	if err != nil {
-		return nil, fmt.Errorf("Could not find protocol handler for: %s", u.Scheme)
+		return nil, errors.Errorf("could not find protocol handler for: %s", u.Scheme)
 	}
 	client, err := getterConstructor(cfg.URL, cfg.CertFile, cfg.KeyFile, cfg.CAFile)
 	if err != nil {
-		return nil, fmt.Errorf("Could not construct protocol handler for: %s error: %v", u.Scheme, err)
+		return nil, errors.Wrapf(err, "could not construct protocol handler for: %s", u.Scheme)
 	}
 
 	return &ChartRepository{
@@ -83,7 +84,7 @@ func (r *ChartRepository) Load() error {
 		return err
 	}
 	if !dirInfo.IsDir() {
-		return fmt.Errorf("%q is not a directory", r.Config.Name)
+		return errors.Errorf("%q is not a directory", r.Config.Name)
 	}
 
 	// FIXME: Why are we recursively walking directories?
@@ -204,7 +205,7 @@ func FindChartInAuthRepoURL(repoURL, username, password, chartName, chartVersion
 	// Download and write the index file to a temporary location
 	tempIndexFile, err := ioutil.TempFile("", "tmp-repo-file")
 	if err != nil {
-		return "", fmt.Errorf("cannot write index file for repository requested")
+		return "", errors.Errorf("cannot write index file for repository requested")
 	}
 	defer os.Remove(tempIndexFile.Name())
 
@@ -221,7 +222,7 @@ func FindChartInAuthRepoURL(repoURL, username, password, chartName, chartVersion
 		return "", err
 	}
 	if err := r.DownloadIndexFile(tempIndexFile.Name()); err != nil {
-		return "", fmt.Errorf("Looks like %q is not a valid chart repository or cannot be reached: %s", repoURL, err)
+		return "", errors.Wrapf(err, "looks like %q is not a valid chart repository or cannot be reached", repoURL)
 	}
 
 	// Read the index file for the repository to get chart information and return chart URL
@@ -236,18 +237,18 @@ func FindChartInAuthRepoURL(repoURL, username, password, chartName, chartVersion
 	}
 	cv, err := repoIndex.Get(chartName, chartVersion)
 	if err != nil {
-		return "", fmt.Errorf("%s not found in %s repository", errMsg, repoURL)
+		return "", errors.Errorf("%s not found in %s repository", errMsg, repoURL)
 	}
 
 	if len(cv.URLs) == 0 {
-		return "", fmt.Errorf("%s has no downloadable URLs", errMsg)
+		return "", errors.Errorf("%s has no downloadable URLs", errMsg)
 	}
 
 	chartURL := cv.URLs[0]
 
 	absoluteChartURL, err := ResolveReferenceURL(repoURL, chartURL)
 	if err != nil {
-		return "", fmt.Errorf("failed to make chart URL absolute: %v", err)
+		return "", errors.Wrap(err, "failed to make chart URL absolute")
 	}
 
 	return absoluteChartURL, nil
@@ -258,12 +259,12 @@ func FindChartInAuthRepoURL(repoURL, username, password, chartName, chartVersion
 func ResolveReferenceURL(baseURL, refURL string) (string, error) {
 	parsedBaseURL, err := url.Parse(baseURL)
 	if err != nil {
-		return "", fmt.Errorf("failed to parse %s as URL: %v", baseURL, err)
+		return "", errors.Wrapf(err, "failed to parse %s as URL", baseURL)
 	}
 
 	parsedRefURL, err := url.Parse(refURL)
 	if err != nil {
-		return "", fmt.Errorf("failed to parse %s as URL: %v", refURL, err)
+		return "", errors.Wrapf(err, "failed to parse %s as URL", refURL)
 	}
 
 	return parsedBaseURL.ResolveReference(parsedRefURL).String(), nil

pkg/repo/chartrepo_test.go

@@ -243,7 +243,7 @@ func TestErrorFindChartInRepoURL(t *testing.T) {
 	if err == nil {
 		t.Errorf("Expected error for bad chart URL, but did not get any errors")
 	}
-	if err != nil && !strings.Contains(err.Error(), `Looks like "http://someserver/something" is not a valid chart repository or cannot be reached: Get http://someserver/something/index.yaml`) {
+	if err != nil && !strings.Contains(err.Error(), `looks like "http://someserver/something" is not a valid chart repository or cannot be reached: Get http://someserver/something/index.yaml`) {
 		t.Errorf("Expected error for bad chart URL, but got a different error (%v)", err)
 	}
 

pkg/repo/index.go

@@ -18,7 +18,6 @@ package repo
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -29,6 +28,7 @@ import (
 
 	"github.com/Masterminds/semver"
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi/chart"
@@ -177,7 +177,7 @@ func (i IndexFile) Get(name, version string) (*ChartVersion, error) {
 			return ver, nil
 		}
 	}
-	return nil, fmt.Errorf("No chart version found for %s-%s", name, version)
+	return nil, errors.Errorf("no chart version found for %s-%s", name, version)
 }
 
 // WriteFile writes an index file to the given destination path.

pkg/repo/repo.go

@@ -17,13 +17,13 @@ limitations under the License.
 package repo // import "k8s.io/helm/pkg/repo"
 
 import (
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
 	"time"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 )
 
 // ErrRepoOutOfDate indicates that the repository file is out of date, but
@@ -57,8 +57,8 @@ func LoadRepositoriesFile(path string) (*RepoFile, error) {
 	b, err := ioutil.ReadFile(path)
 	if err != nil {
 		if os.IsNotExist(err) {
-			return nil, fmt.Errorf(
-				"Couldn't load repositories file (%s).\n"+
+			return nil, errors.Errorf(
+				"couldn't load repositories file (%s).\n"+
 					"You might need to run `helm init` (or "+
 					"`helm init --client-only` if tiller is "+
 					"already installed)", path)

pkg/resolver/resolver.go

@@ -18,13 +18,13 @@ package resolver
 import (
 	"bytes"
 	"encoding/json"
-	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
 	"time"
 
 	"github.com/Masterminds/semver"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/helm/helmpath"
@@ -68,17 +68,17 @@ func (r *Resolver) Resolve(reqs *chartutil.Requirements, repoNames map[string]st
 		}
 		constraint, err := semver.NewConstraint(d.Version)
 		if err != nil {
-			return nil, fmt.Errorf("dependency %q has an invalid version/constraint format: %s", d.Name, err)
+			return nil, errors.Wrapf(err, "dependency %q has an invalid version/constraint format", d.Name)
 		}
 
 		repoIndex, err := repo.LoadIndexFile(r.helmhome.CacheIndex(repoNames[d.Name]))
 		if err != nil {
-			return nil, fmt.Errorf("no cached repo found. (try 'helm repo update'). %s", err)
+			return nil, errors.Wrap(err, "no cached repo found. (try 'helm repo update')")
 		}
 
 		vs, ok := repoIndex.Entries[d.Name]
 		if !ok {
-			return nil, fmt.Errorf("%s chart not found in repo %s", d.Name, d.Repository)
+			return nil, errors.Errorf("%s chart not found in repo %s", d.Name, d.Repository)
 		}
 
 		locked[i] = &chartutil.Dependency{
@@ -105,7 +105,7 @@ func (r *Resolver) Resolve(reqs *chartutil.Requirements, repoNames map[string]st
 		}
 	}
 	if len(missing) > 0 {
-		return nil, fmt.Errorf("Can't get a valid version for repositories %s. Try changing the version constraint in requirements.yaml", strings.Join(missing, ", "))
+		return nil, errors.Errorf("can't get a valid version for repositories %s. Try changing the version constraint in requirements.yaml", strings.Join(missing, ", "))
 	}
 	return &chartutil.RequirementsLock{
 		Generated:    time.Now(),
@@ -129,7 +129,7 @@ func HashReq(req *chartutil.Requirements) (string, error) {
 
 // GetLocalPath generates absolute local path when use
 // "file://" in repository of requirements
-func GetLocalPath(repo string, chartpath string) (string, error) {
+func GetLocalPath(repo, chartpath string) (string, error) {
 	var depPath string
 	var err error
 	p := strings.TrimPrefix(repo, "file://")
@@ -144,7 +144,7 @@ func GetLocalPath(repo string, chartpath string) (string, error) {
 	}
 
 	if _, err = os.Stat(depPath); os.IsNotExist(err) {
-		return "", fmt.Errorf("directory %s not found", depPath)
+		return "", errors.Errorf("directory %s not found", depPath)
 	} else if err != nil {
 		return "", err
 	}

pkg/storage/driver/cfgmaps.go

@@ -17,11 +17,12 @@ limitations under the License.
 package driver // import "k8s.io/helm/pkg/storage/driver"
 
 import (
-	"fmt"
 	"strconv"
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -117,7 +118,7 @@ func (cfgmaps *ConfigMaps) Query(labels map[string]string) ([]*rspb.Release, err
 	ls := kblabels.Set{}
 	for k, v := range labels {
 		if errs := validation.IsValidLabelValue(v); len(errs) != 0 {
-			return nil, fmt.Errorf("invalid label value: %q: %s", v, strings.Join(errs, "; "))
+			return nil, errors.Errorf("invalid label value: %q: %s", v, strings.Join(errs, "; "))
 		}
 		ls[k] = v
 	}

pkg/storage/driver/driver.go

@@ -17,18 +17,18 @@ limitations under the License.
 package driver // import "k8s.io/helm/pkg/storage/driver"
 
 import (
-	"fmt"
+	"github.com/pkg/errors"
 
 	rspb "k8s.io/helm/pkg/hapi/release"
 )
 
 var (
 	// ErrReleaseNotFound indicates that a release is not found.
-	ErrReleaseNotFound = func(release string) error { return fmt.Errorf("release: %q not found", release) }
+	ErrReleaseNotFound = func(release string) error { return errors.Errorf("release: %q not found", release) }
 	// ErrReleaseExists indicates that a release already exists.
-	ErrReleaseExists = func(release string) error { return fmt.Errorf("release: %q already exists", release) }
+	ErrReleaseExists = func(release string) error { return errors.Errorf("release: %q already exists", release) }
 	// ErrInvalidKey indicates that a release key could not be parsed.
-	ErrInvalidKey = func(release string) error { return fmt.Errorf("release: %q invalid key", release) }
+	ErrInvalidKey = func(release string) error { return errors.Errorf("release: %q invalid key", release) }
 )
 
 // Creator is the interface that wraps the Create method.

pkg/storage/driver/secrets.go

@@ -17,11 +17,12 @@ limitations under the License.
 package driver // import "k8s.io/helm/pkg/storage/driver"
 
 import (
-	"fmt"
 	"strconv"
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -67,18 +68,11 @@ func (secrets *Secrets) Get(key string) (*rspb.Release, error) {
 		if apierrors.IsNotFound(err) {
 			return nil, ErrReleaseNotFound(key)
 		}
-
-		secrets.Log("get: failed to get %q: %s", key, err)
-		return nil, err
+		return nil, errors.Wrapf(err, "get: failed to get %q", key)
 	}
 	// found the secret, decode the base64 data string
 	r, err := decodeRelease(string(obj.Data["release"]))
-	if err != nil {
-		secrets.Log("get: failed to decode data %q: %s", key, err)
-		return nil, err
-	}
-	// return the release object
-	return r, nil
+	return r, errors.Wrapf(err, "get: failed to decode data %q", key)
 }
 
 // List fetches all releases and returns the list releases such
@@ -90,8 +84,7 @@ func (secrets *Secrets) List(filter func(*rspb.Release) bool) ([]*rspb.Release,
 
 	list, err := secrets.impl.List(opts)
 	if err != nil {
-		secrets.Log("list: failed to list: %s", err)
-		return nil, err
+		return nil, errors.Wrap(err, "list: failed to list")
 	}
 
 	var results []*rspb.Release
@@ -117,7 +110,7 @@ func (secrets *Secrets) Query(labels map[string]string) ([]*rspb.Release, error)
 	ls := kblabels.Set{}
 	for k, v := range labels {
 		if errs := validation.IsValidLabelValue(v); len(errs) != 0 {
-			return nil, fmt.Errorf("invalid label value: %q: %s", v, strings.Join(errs, "; "))
+			return nil, errors.Errorf("invalid label value: %q: %s", v, strings.Join(errs, "; "))
 		}
 		ls[k] = v
 	}
@@ -126,8 +119,7 @@ func (secrets *Secrets) Query(labels map[string]string) ([]*rspb.Release, error)
 
 	list, err := secrets.impl.List(opts)
 	if err != nil {
-		secrets.Log("query: failed to query with labels: %s", err)
-		return nil, err
+		return nil, errors.Wrap(err, "query: failed to query with labels")
 	}
 
 	if len(list.Items) == 0 {
@@ -158,8 +150,7 @@ func (secrets *Secrets) Create(key string, rls *rspb.Release) error {
 	// create a new secret to hold the release
 	obj, err := newSecretsObject(key, rls, lbs)
 	if err != nil {
-		secrets.Log("create: failed to encode release %q: %s", rls.Name, err)
-		return err
+		return errors.Wrapf(err, "create: failed to encode release %q", rls.Name)
 	}
 	// push the secret object out into the kubiverse
 	if _, err := secrets.impl.Create(obj); err != nil {
@@ -167,8 +158,7 @@ func (secrets *Secrets) Create(key string, rls *rspb.Release) error {
 			return ErrReleaseExists(rls.Name)
 		}
 
-		secrets.Log("create: failed to create: %s", err)
-		return err
+		return errors.Wrap(err, "create: failed to create")
 	}
 	return nil
 }
@@ -185,16 +175,11 @@ func (secrets *Secrets) Update(key string, rls *rspb.Release) error {
 	// create a new secret object to hold the release
 	obj, err := newSecretsObject(key, rls, lbs)
 	if err != nil {
-		secrets.Log("update: failed to encode release %q: %s", rls.Name, err)
-		return err
+		return errors.Wrapf(err, "update: failed to encode release %q", rls.Name)
 	}
 	// push the secret object out into the kubiverse
 	_, err = secrets.impl.Update(obj)
-	if err != nil {
-		secrets.Log("update: failed to update: %s", err)
-		return err
-	}
-	return nil
+	return errors.Wrap(err, "update: failed to update")
 }
 
 // Delete deletes the Secret holding the release named by key.
@@ -205,14 +190,11 @@ func (secrets *Secrets) Delete(key string) (rls *rspb.Release, err error) {
 			return nil, ErrReleaseExists(rls.Name)
 		}
 
-		secrets.Log("delete: failed to get release %q: %s", key, err)
-		return nil, err
+		return nil, errors.Wrapf(err, "delete: failed to get release %q", key)
 	}
 	// delete the release
-	if err = secrets.impl.Delete(key, &metav1.DeleteOptions{}); err != nil {
-		return rls, err
-	}
-	return rls, nil
+	err = secrets.impl.Delete(key, &metav1.DeleteOptions{})
+	return rls, err
 }
 
 // newSecretsObject constructs a kubernetes Secret object

pkg/storage/storage.go

@@ -20,6 +20,8 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/pkg/errors"
+
 	rspb "k8s.io/helm/pkg/hapi/release"
 	relutil "k8s.io/helm/pkg/releaseutil"
 	"k8s.io/helm/pkg/storage/driver"
@@ -124,13 +126,13 @@ func (s *Storage) Deployed(name string) (*rspb.Release, error) {
 	ls, err := s.DeployedAll(name)
 	if err != nil {
 		if strings.Contains(err.Error(), "not found") {
-			return nil, fmt.Errorf("%q has no deployed releases", name)
+			return nil, errors.Errorf("%q has no deployed releases", name)
 		}
 		return nil, err
 	}
 
 	if len(ls) == 0 {
-		return nil, fmt.Errorf("%q has no deployed releases", name)
+		return nil, errors.Errorf("%q has no deployed releases", name)
 	}
 
 	return ls[0], err
@@ -150,7 +152,7 @@ func (s *Storage) DeployedAll(name string) ([]*rspb.Release, error) {
 		return ls, nil
 	}
 	if strings.Contains(err.Error(), "not found") {
-		return nil, fmt.Errorf("%q has no deployed releases", name)
+		return nil, errors.Errorf("%q has no deployed releases", name)
 	}
 	return nil, err
 }
@@ -187,24 +189,24 @@ func (s *Storage) removeLeastRecent(name string, max int) error {
 	// Delete as many as possible. In the case of API throughput limitations,
 	// multiple invocations of this function will eventually delete them all.
 	toDelete := h[0:overage]
-	errors := []error{}
+	errs := []error{}
 	for _, rel := range toDelete {
 		key := makeKey(name, rel.Version)
 		_, innerErr := s.Delete(name, rel.Version)
 		if innerErr != nil {
 			s.Log("error pruning %s from release history: %s", key, innerErr)
-			errors = append(errors, innerErr)
+			errs = append(errs, innerErr)
 		}
 	}
 
-	s.Log("Pruned %d record(s) from %s with %d error(s)", len(toDelete), name, len(errors))
-	switch c := len(errors); c {
+	s.Log("Pruned %d record(s) from %s with %d error(s)", len(toDelete), name, len(errs))
+	switch c := len(errs); c {
 	case 0:
 		return nil
 	case 1:
-		return errors[0]
+		return errs[0]
 	default:
-		return fmt.Errorf("encountered %d deletion errors. First is: %s", c, errors[0])
+		return errors.Errorf("encountered %d deletion errors. First is: %s", c, errs[0])
 	}
 }
 
@@ -216,7 +218,7 @@ func (s *Storage) Last(name string) (*rspb.Release, error) {
 		return nil, err
 	}
 	if len(h) == 0 {
-		return nil, fmt.Errorf("no revision for release %q", name)
+		return nil, errors.Errorf("no revision for release %q", name)
 	}
 
 	relutil.Reverse(h, relutil.SortByRevision)

pkg/strvals/parser.go

@@ -17,13 +17,12 @@ package strvals
 
 import (
 	"bytes"
-	"errors"
-	"fmt"
 	"io"
 	"strconv"
 	"strings"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 )
 
 // ErrNotList indicates that a non-list was treated as a list.
@@ -121,14 +120,14 @@ func (t *parser) key(data map[string]interface{}) error {
 			if len(k) == 0 {
 				return err
 			}
-			return fmt.Errorf("key %q has no value", string(k))
+			return errors.Errorf("key %q has no value", string(k))
 			//set(data, string(k), "")
 			//return err
 		case last == '[':
 			// We are in a list index context, so we need to set an index.
 			i, err := t.keyIndex()
 			if err != nil {
-				return fmt.Errorf("error parsing index: %s", err)
+				return errors.Wrap(err, "error parsing index")
 			}
 			kk := string(k)
 			// Find or create target list
@@ -163,7 +162,7 @@ func (t *parser) key(data map[string]interface{}) error {
 		case last == ',':
 			// No value given. Set the value to empty string. Return error.
 			set(data, string(k), "")
-			return fmt.Errorf("key %q has no value (cannot end with ,)", string(k))
+			return errors.Errorf("key %q has no value (cannot end with ,)", string(k))
 		case last == '.':
 			// First, create or find the target map.
 			inner := map[string]interface{}{}
@@ -174,7 +173,7 @@ func (t *parser) key(data map[string]interface{}) error {
 			// Recurse
 			e := t.key(inner)
 			if len(inner) == 0 {
-				return fmt.Errorf("key map %q has no value", string(k))
+				return errors.Errorf("key map %q has no value", string(k))
 			}
 			set(data, string(k), inner)
 			return e
@@ -215,7 +214,7 @@ func (t *parser) listItem(list []interface{}, i int) ([]interface{}, error) {
 	stop := runeSet([]rune{'[', '.', '='})
 	switch k, last, err := runesUntil(t.sc, stop); {
 	case len(k) > 0:
-		return list, fmt.Errorf("unexpected data at end of array index: %q", k)
+		return list, errors.Errorf("unexpected data at end of array index: %q", k)
 	case err != nil:
 		return list, err
 	case last == '=':
@@ -235,7 +234,7 @@ func (t *parser) listItem(list []interface{}, i int) ([]interface{}, error) {
 		// now we have a nested list. Read the index and handle.
 		i, err := t.keyIndex()
 		if err != nil {
-			return list, fmt.Errorf("error parsing index: %s", err)
+			return list, errors.Wrap(err, "error parsing index")
 		}
 		// Now we need to get the value after the ].
 		list2, err := t.listItem(list, i)
@@ -251,7 +250,7 @@ func (t *parser) listItem(list []interface{}, i int) ([]interface{}, error) {
 		e := t.key(inner)
 		return setIndex(list, i, inner), e
 	default:
-		return nil, fmt.Errorf("parse error: unexpected token %v", last)
+		return nil, errors.Errorf("parse error: unexpected token %v", last)
 	}
 }
 

pkg/sympath/walk.go

@@ -21,10 +21,11 @@ limitations under the License.
 package sympath
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 	"sort"
+
+	"github.com/pkg/errors"
 )
 
 // Walk walks the file tree rooted at root, calling walkFn for each file or directory
@@ -67,7 +68,7 @@ func symwalk(path string, info os.FileInfo, walkFn filepath.WalkFunc) error {
 	if IsSymlink(info) {
 		resolved, err := filepath.EvalSymlinks(path)
 		if err != nil {
-			return fmt.Errorf("error evaluating symlink %s: %s", path, err)
+			return errors.Wrapf(err, "error evaluating symlink %s", path)
 		}
 		if info, err = os.Lstat(resolved); err != nil {
 			return err

pkg/tiller/environment/environment.go

@@ -173,7 +173,7 @@ func (p *PrintingKubeClient) WatchUntilReady(ns string, r io.Reader, timeout int
 }
 
 // Update implements KubeClient Update.
-func (p *PrintingKubeClient) Update(ns string, currentReader, modifiedReader io.Reader, force bool, recreate bool, timeout int64, shouldWait bool) error {
+func (p *PrintingKubeClient) Update(ns string, currentReader, modifiedReader io.Reader, force, recreate bool, timeout int64, shouldWait bool) error {
 	_, err := io.Copy(p.Out, modifiedReader)
 	return err
 }

pkg/tiller/environment/environment_test.go

@@ -49,7 +49,7 @@ func (k *mockKubeClient) Get(ns string, r io.Reader) (string, error) {
 func (k *mockKubeClient) Delete(ns string, r io.Reader) error {
 	return nil
 }
-func (k *mockKubeClient) Update(ns string, currentReader, modifiedReader io.Reader, force bool, recreate bool, timeout int64, shouldWait bool) error {
+func (k *mockKubeClient) Update(ns string, currentReader, modifiedReader io.Reader, force, recreate bool, timeout int64, shouldWait bool) error {
 	return nil
 }
 func (k *mockKubeClient) WatchUntilReady(ns string, r io.Reader, timeout int64, shouldWait bool) error {

pkg/tiller/hooks.go

@@ -17,13 +17,13 @@ limitations under the License.
 package tiller
 
 import (
-	"fmt"
 	"log"
 	"path"
 	"strconv"
 	"strings"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi/release"
@@ -130,15 +130,12 @@ func sortManifests(files map[string]string, apis chartutil.VersionSet, sort Sort
 func (file *manifestFile) sort(result *result) error {
 	for _, m := range file.entries {
 		var entry util.SimpleHead
-		err := yaml.Unmarshal([]byte(m), &entry)
-
-		if err != nil {
-			e := fmt.Errorf("YAML parse error on %s: %s", file.path, err)
-			return e
+		if err := yaml.Unmarshal([]byte(m), &entry); err != nil {
+			return errors.Wrapf(err, "YAML parse error on %s", file.path)
 		}
 
 		if entry.Version != "" && !file.apis.Has(entry.Version) {
-			return fmt.Errorf("apiVersion %q in %s is not available", entry.Version, file.path)
+			return errors.Errorf("apiVersion %q in %s is not available", entry.Version, file.path)
 		}
 
 		if !hasAnyAnnotation(entry) {

pkg/tiller/release_content.go

@@ -17,6 +17,8 @@ limitations under the License.
 package tiller
 
 import (
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
 )
@@ -24,8 +26,7 @@ import (
 // GetReleaseContent gets all of the stored information for the given release.
 func (s *ReleaseServer) GetReleaseContent(req *hapi.GetReleaseContentRequest) (*release.Release, error) {
 	if err := validateReleaseName(req.Name); err != nil {
-		s.Log("releaseContent: Release name is invalid: %s", req.Name)
-		return nil, err
+		return nil, errors.Errorf("releaseContent: Release name is invalid: %s", req.Name)
 	}
 
 	if req.Version <= 0 {

pkg/tiller/release_history.go

@@ -17,6 +17,8 @@ limitations under the License.
 package tiller
 
 import (
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
 	relutil "k8s.io/helm/pkg/releaseutil"
@@ -25,8 +27,7 @@ import (
 // GetHistory gets the history for a given release.
 func (s *ReleaseServer) GetHistory(req *hapi.GetHistoryRequest) ([]*release.Release, error) {
 	if err := validateReleaseName(req.Name); err != nil {
-		s.Log("getHistory: Release name is invalid: %s", req.Name)
-		return nil, err
+		return nil, errors.Errorf("getHistory: Release name is invalid: %s", req.Name)
 	}
 
 	s.Log("getting history for release %s", req.Name)

pkg/tiller/release_install.go

@@ -22,6 +22,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
@@ -34,22 +36,17 @@ func (s *ReleaseServer) InstallRelease(req *hapi.InstallReleaseRequest) (*releas
 	s.Log("preparing install for %s", req.Name)
 	rel, err := s.prepareRelease(req)
 	if err != nil {
-		s.Log("failed install prepare step: %s", err)
-
 		// On dry run, append the manifest contents to a failed release. This is
 		// a stop-gap until we can revisit an error backchannel post-2.0.
 		if req.DryRun && strings.HasPrefix(err.Error(), "YAML parse error") {
-			err = fmt.Errorf("%s\n%s", err, rel.Manifest)
+			err = errors.Wrap(err, rel.Manifest)
 		}
-		return rel, err
+		return rel, errors.Wrap(err, "failed install prepare step")
 	}
 
 	s.Log("performing install for %s", req.Name)
 	res, err := s.performRelease(rel, req)
-	if err != nil {
-		s.Log("failed install perform step: %s", err)
-	}
-	return res, err
+	return res, errors.Wrap(err, "failed install perform step")
 }
 
 // prepareRelease builds a release for an install operation.
@@ -192,7 +189,7 @@ func (s *ReleaseServer) performRelease(r *release.Release, req *hapi.InstallRele
 			r.Info.Status = release.StatusFailed
 			r.Info.Description = msg
 			s.recordRelease(r, true)
-			return r, fmt.Errorf("release %s failed: %s", r.Name, err)
+			return r, errors.Wrapf(err, "release %s failed", r.Name)
 		}
 	}
 

pkg/tiller/release_install_test.go

@@ -364,7 +364,7 @@ func TestInstallRelease_WrongKubeVersion(t *testing.T) {
 		t.Fatalf("Expected to fail because of wrong version")
 	}
 
-	expect := "Chart requires kubernetesVersion"
+	expect := "chart requires kubernetesVersion"
 	if !strings.Contains(err.Error(), expect) {
 		t.Errorf("Expected %q to contain %q", err.Error(), expect)
 	}

pkg/tiller/release_rollback.go

@@ -21,6 +21,8 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
 	"k8s.io/helm/pkg/hooks"
@@ -60,8 +62,7 @@ func (s *ReleaseServer) RollbackRelease(req *hapi.RollbackReleaseRequest) (*rele
 // the previous release's configuration
 func (s *ReleaseServer) prepareRollback(req *hapi.RollbackReleaseRequest) (*release.Release, *release.Release, error) {
 	if err := validateReleaseName(req.Name); err != nil {
-		s.Log("prepareRollback: Release name is invalid: %s", req.Name)
-		return nil, nil, err
+		return nil, nil, errors.Errorf("prepareRollback: Release name is invalid: %s", req.Name)
 	}
 
 	if req.Version < 0 {

pkg/tiller/release_server.go

@@ -18,13 +18,12 @@ package tiller
 
 import (
 	"bytes"
-	"errors"
-	"fmt"
 	"path"
 	"regexp"
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
 	"github.com/technosophos/moniker"
 	"gopkg.in/yaml.v2"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -123,9 +122,7 @@ func (s *ReleaseServer) reuseValues(req *hapi.UpdateReleaseRequest, current *rel
 		// We have to regenerate the old coalesced values:
 		oldVals, err := chartutil.CoalesceValues(current.Chart, current.Config)
 		if err != nil {
-			err := fmt.Errorf("failed to rebuild old values: %s", err)
-			s.Log("%s", err)
-			return err
+			return errors.Wrap(err, "failed to rebuild old values")
 		}
 		nv, err := yaml.Marshal(oldVals)
 		if err != nil {
@@ -170,7 +167,7 @@ func (s *ReleaseServer) uniqName(start string, reuse bool) (string, error) {
 	if start != "" {
 
 		if len(start) > releaseNameMaxLen {
-			return "", fmt.Errorf("release name %q exceeds max length of %d", start, releaseNameMaxLen)
+			return "", errors.Errorf("release name %q exceeds max length of %d", start, releaseNameMaxLen)
 		}
 
 		h, err := s.Releases.History(start)
@@ -188,7 +185,7 @@ func (s *ReleaseServer) uniqName(start string, reuse bool) (string, error) {
 			return "", errors.New("cannot re-use a name that is still in use")
 		}
 
-		return "", fmt.Errorf("a release named %s already exists.\nRun: helm ls --all %s; to check the status of the release\nOr run: helm del --purge %s; to delete it", start, start, start)
+		return "", errors.Errorf("a release named %s already exists.\nRun: helm ls --all %s; to check the status of the release\nOr run: helm del --purge %s; to delete it", start, start, start)
 	}
 
 	maxTries := 5
@@ -227,7 +224,7 @@ func capabilities(disc discovery.DiscoveryInterface) (*chartutil.Capabilities, e
 	}
 	vs, err := GetVersionSet(disc)
 	if err != nil {
-		return nil, fmt.Errorf("Could not get apiVersions from Kubernetes: %s", err)
+		return nil, errors.Wrap(err, "could not get apiVersions from Kubernetes")
 	}
 	return &chartutil.Capabilities{
 		APIVersions: vs,
@@ -260,7 +257,7 @@ func (s *ReleaseServer) renderResources(ch *chart.Chart, values chartutil.Values
 	sver := version.GetVersion()
 	if ch.Metadata.HelmVersion != "" &&
 		!version.IsCompatibleRange(ch.Metadata.HelmVersion, sver) {
-		return nil, nil, "", fmt.Errorf("Chart incompatible with Tiller %s", sver)
+		return nil, nil, "", errors.Errorf("chart incompatible with Tiller %s", sver)
 	}
 
 	if ch.Metadata.KubeVersion != "" {
@@ -268,7 +265,7 @@ func (s *ReleaseServer) renderResources(ch *chart.Chart, values chartutil.Values
 		gitVersion := cap.KubeVersion.String()
 		k8sVersion := strings.Split(gitVersion, "+")[0]
 		if !version.IsCompatibleRange(ch.Metadata.KubeVersion, k8sVersion) {
-			return nil, nil, "", fmt.Errorf("Chart requires kubernetesVersion: %s which is incompatible with Kubernetes %s", ch.Metadata.KubeVersion, k8sVersion)
+			return nil, nil, "", errors.Errorf("chart requires kubernetesVersion: %s which is incompatible with Kubernetes %s", ch.Metadata.KubeVersion, k8sVersion)
 		}
 	}
 
@@ -341,7 +338,7 @@ func (s *ReleaseServer) recordRelease(r *release.Release, reuse bool) {
 func (s *ReleaseServer) execHook(hs []*release.Hook, name, namespace, hook string, timeout int64) error {
 	code, ok := events[hook]
 	if !ok {
-		return fmt.Errorf("unknown hook %s", hook)
+		return errors.Errorf("unknown hook %s", hook)
 	}
 
 	s.Log("executing %d %s hooks for %s", len(hs), hook, name)
@@ -363,8 +360,7 @@ func (s *ReleaseServer) execHook(hs []*release.Hook, name, namespace, hook strin
 
 		b := bytes.NewBufferString(h.Manifest)
 		if err := s.KubeClient.Create(namespace, b, timeout, false); err != nil {
-			s.Log("warning: Release %s %s %s failed: %s", name, hook, h.Path, err)
-			return err
+			return errors.Wrapf(err, "warning: Release %s %s %s failed", name, hook, h.Path)
 		}
 		// No way to rewind a bytes.Buffer()?
 		b.Reset()
@@ -412,7 +408,7 @@ func validateReleaseName(releaseName string) error {
 	return nil
 }
 
-func (s *ReleaseServer) deleteHookIfShouldBeDeletedByDeletePolicy(h *release.Hook, policy string, name, namespace, hook string, kubeCli environment.KubeClient) error {
+func (s *ReleaseServer) deleteHookIfShouldBeDeletedByDeletePolicy(h *release.Hook, policy, name, namespace, hook string, kubeCli environment.KubeClient) error {
 	b := bytes.NewBufferString(h.Manifest)
 	if hookHasDeletePolicy(h, policy) {
 		s.Log("deleting %s hook %s for release %s due to %q policy", hook, h.Name, name, policy)

pkg/tiller/release_server_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package tiller
 
 import (
-	"errors"
 	"flag"
 	"fmt"
 	"io"
@@ -28,6 +27,7 @@ import (
 	"time"
 
 	"github.com/ghodss/yaml"
+	"github.com/pkg/errors"
 	"k8s.io/client-go/kubernetes/fake"
 	"k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
@@ -396,7 +396,7 @@ type updateFailingKubeClient struct {
 	environment.PrintingKubeClient
 }
 
-func (u *updateFailingKubeClient) Update(namespace string, originalReader, modifiedReader io.Reader, force bool, recreate bool, timeout int64, shouldWait bool) error {
+func (u *updateFailingKubeClient) Update(namespace string, originalReader, modifiedReader io.Reader, force, recreate bool, timeout int64, shouldWait bool) error {
 	return errors.New("Failed update in kube client")
 }
 
@@ -474,16 +474,16 @@ func (kc *mockHooksKubeClient) WatchUntilReady(ns string, r io.Reader, timeout i
 
 	manifest, hasManifest := kc.Resources[paramManifest.Metadata.Name]
 	if !hasManifest {
-		return fmt.Errorf("mockHooksKubeClient.WatchUntilReady: no such resource %s found", paramManifest.Metadata.Name)
+		return errors.Errorf("mockHooksKubeClient.WatchUntilReady: no such resource %s found", paramManifest.Metadata.Name)
 	}
 
 	if manifest.Metadata.Annotations["mockHooksKubeClient/Emulate"] == "hook-failed" {
-		return fmt.Errorf("mockHooksKubeClient.WatchUntilReady: hook-failed")
+		return errors.Errorf("mockHooksKubeClient.WatchUntilReady: hook-failed")
 	}
 
 	return nil
 }
-func (kc *mockHooksKubeClient) Update(ns string, currentReader, modifiedReader io.Reader, force bool, recreate bool, timeout int64, shouldWait bool) error {
+func (kc *mockHooksKubeClient) Update(ns string, currentReader, modifiedReader io.Reader, force, recreate bool, timeout int64, shouldWait bool) error {
 	return nil
 }
 func (kc *mockHooksKubeClient) Build(ns string, reader io.Reader) (kube.Result, error) {
@@ -533,23 +533,22 @@ name: value`, hookName, extraAnnotationsStr),
 	}
 }
 
-func execHookShouldSucceed(rs *ReleaseServer, hook *release.Hook, releaseName string, namespace string, hookType string) error {
-	if err := rs.execHook([]*release.Hook{hook}, releaseName, namespace, hookType, 600); err != nil {
-		return fmt.Errorf("expected hook %s to be successful: %s", hook.Name, err)
-	}
-	return nil
+func execHookShouldSucceed(rs *ReleaseServer, hook *release.Hook, releaseName, namespace, hookType string) error {
+	err := rs.execHook([]*release.Hook{hook}, releaseName, namespace, hookType, 600)
+	return errors.Wrapf(err, "expected hook %s to be successful", hook.Name)
 }
 
-func execHookShouldFail(rs *ReleaseServer, hook *release.Hook, releaseName string, namespace string, hookType string) error {
+func execHookShouldFail(rs *ReleaseServer, hook *release.Hook, releaseName, namespace, hookType string) error {
 	if err := rs.execHook([]*release.Hook{hook}, releaseName, namespace, hookType, 600); err == nil {
-		return fmt.Errorf("expected hook %s to be failed", hook.Name)
+		return errors.Errorf("expected hook %s to be failed", hook.Name)
 	}
 	return nil
 }
 
-func execHookShouldFailWithError(rs *ReleaseServer, hook *release.Hook, releaseName string, namespace string, hookType string, expectedError error) error {
-	if err := rs.execHook([]*release.Hook{hook}, releaseName, namespace, hookType, 600); err != expectedError {
-		return fmt.Errorf("expected hook %s to fail with error %v, got %v", hook.Name, expectedError, err)
+func execHookShouldFailWithError(rs *ReleaseServer, hook *release.Hook, releaseName, namespace, hookType string, expectedError error) error {
+	err := rs.execHook([]*release.Hook{hook}, releaseName, namespace, hookType, 600)
+	if cause := errors.Cause(err); cause != expectedError {
+		return errors.Errorf("expected hook %s to fail with error \n%v \ngot \n%v", hook.Name, expectedError, cause)
 	}
 	return nil
 }

pkg/tiller/release_status.go

@@ -18,8 +18,8 @@ package tiller
 
 import (
 	"bytes"
-	"errors"
-	"fmt"
+
+	"github.com/pkg/errors"
 
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
@@ -28,8 +28,7 @@ import (
 // GetReleaseStatus gets the status information for a named release.
 func (s *ReleaseServer) GetReleaseStatus(req *hapi.GetReleaseStatusRequest) (*hapi.GetReleaseStatusResponse, error) {
 	if err := validateReleaseName(req.Name); err != nil {
-		s.Log("getStatus: Release name is invalid: %s", req.Name)
-		return nil, err
+		return nil, errors.Errorf("getStatus: Release name is invalid: %s", req.Name)
 	}
 
 	var rel *release.Release
@@ -38,12 +37,12 @@ func (s *ReleaseServer) GetReleaseStatus(req *hapi.GetReleaseStatusRequest) (*ha
 		var err error
 		rel, err = s.Releases.Last(req.Name)
 		if err != nil {
-			return nil, fmt.Errorf("getting deployed release %q: %s", req.Name, err)
+			return nil, errors.Wrapf(err, "getting deployed release %q", req.Name)
 		}
 	} else {
 		var err error
 		if rel, err = s.Releases.Get(req.Name, req.Version); err != nil {
-			return nil, fmt.Errorf("getting release '%s' (v%d): %s", req.Name, req.Version, err)
+			return nil, errors.Wrapf(err, "getting release '%s' (v%d)", req.Name, req.Version)
 		}
 	}
 
@@ -68,8 +67,7 @@ func (s *ReleaseServer) GetReleaseStatus(req *hapi.GetReleaseStatusRequest) (*ha
 		// Skip errors if this is already deleted or failed.
 		return statusResp, nil
 	} else if err != nil {
-		s.Log("warning: Get for %s failed: %v", rel.Name, err)
-		return nil, err
+		return nil, errors.Wrapf(err, "warning: Get for %s failed", rel.Name)
 	}
 	rel.Info.Resources = resp
 	return statusResp, nil

pkg/tiller/release_testing.go

@@ -17,6 +17,8 @@ limitations under the License.
 package tiller
 
 import (
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
 	reltesting "k8s.io/helm/pkg/releasetesting"
@@ -26,8 +28,7 @@ import (
 func (s *ReleaseServer) RunReleaseTest(req *hapi.TestReleaseRequest) (<-chan *hapi.TestReleaseResponse, <-chan error) {
 	errc := make(chan error, 1)
 	if err := validateReleaseName(req.Name); err != nil {
-		s.Log("releaseTest: Release name is invalid: %s", req.Name)
-		errc <- err
+		errc <- errors.Errorf("releaseTest: Release name is invalid: %s", req.Name)
 		return nil, errc
 	}
 
@@ -53,8 +54,7 @@ func (s *ReleaseServer) RunReleaseTest(req *hapi.TestReleaseRequest) (<-chan *ha
 		defer close(ch)
 
 		if err := tSuite.Run(testEnv); err != nil {
-			s.Log("error running test suite for %s: %s", rel.Name, err)
-			errc <- err
+			errc <- errors.Wrapf(err, "error running test suite for %s", rel.Name)
 			return
 		}
 

pkg/tiller/release_uninstall.go

@@ -18,11 +18,11 @@ package tiller
 
 import (
 	"bytes"
-	"errors"
-	"fmt"
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
 	"k8s.io/helm/pkg/hooks"
@@ -33,14 +33,12 @@ import (
 // UninstallRelease deletes all of the resources associated with this release, and marks the release DELETED.
 func (s *ReleaseServer) UninstallRelease(req *hapi.UninstallReleaseRequest) (*hapi.UninstallReleaseResponse, error) {
 	if err := validateReleaseName(req.Name); err != nil {
-		s.Log("uninstallRelease: Release name is invalid: %s", req.Name)
-		return nil, err
+		return nil, errors.Errorf("uninstall: Release name is invalid: %s", req.Name)
 	}
 
 	rels, err := s.Releases.History(req.Name)
 	if err != nil {
-		s.Log("uninstall: Release not loaded: %s", req.Name)
-		return nil, err
+		return nil, errors.Wrapf(err, "uninstall: Release not loaded: %s", req.Name)
 	}
 	if len(rels) < 1 {
 		return nil, errMissingRelease
@@ -54,12 +52,11 @@ func (s *ReleaseServer) UninstallRelease(req *hapi.UninstallReleaseRequest) (*ha
 	if rel.Info.Status == release.StatusDeleted {
 		if req.Purge {
 			if err := s.purgeReleases(rels...); err != nil {
-				s.Log("uninstall: Failed to purge the release: %s", err)
-				return nil, err
+				return nil, errors.Wrap(err, "uninstall: Failed to purge the release")
 			}
 			return &hapi.UninstallReleaseResponse{Release: rel}, nil
 		}
-		return nil, fmt.Errorf("the release named %q is already deleted", req.Name)
+		return nil, errors.Errorf("the release named %q is already deleted", req.Name)
 	}
 
 	s.Log("uninstall: Deleting %s", req.Name)
@@ -97,10 +94,7 @@ func (s *ReleaseServer) UninstallRelease(req *hapi.UninstallReleaseRequest) (*ha
 	if req.Purge {
 		s.Log("purge requested for %s", req.Name)
 		err := s.purgeReleases(rels...)
-		if err != nil {
-			s.Log("uninstall: Failed to purge the release: %s", err)
-		}
-		return res, err
+		return res, errors.Wrap(err, "uninstall: Failed to purge the release")
 	}
 
 	if err := s.Releases.Update(rel); err != nil {
@@ -108,7 +102,7 @@ func (s *ReleaseServer) UninstallRelease(req *hapi.UninstallReleaseRequest) (*ha
 	}
 
 	if len(errs) > 0 {
-		return res, fmt.Errorf("deletion completed with %d error(s): %s", len(errs), joinErrors(errs))
+		return res, errors.Errorf("deletion completed with %d error(s): %s", len(errs), joinErrors(errs))
 	}
 	return res, nil
 }
@@ -134,7 +128,7 @@ func (s *ReleaseServer) purgeReleases(rels ...*release.Release) error {
 func (s *ReleaseServer) deleteRelease(rel *release.Release) (kept string, errs []error) {
 	vs, err := GetVersionSet(s.discovery)
 	if err != nil {
-		return rel.Manifest, []error{fmt.Errorf("Could not get apiVersions from Kubernetes: %v", err)}
+		return rel.Manifest, []error{errors.Wrap(err, "could not get apiVersions from Kubernetes")}
 	}
 
 	manifests := relutil.SplitManifests(rel.Manifest)
@@ -144,7 +138,7 @@ func (s *ReleaseServer) deleteRelease(rel *release.Release) (kept string, errs [
 		// FIXME: One way to delete at this point would be to try a label-based
 		// deletion. The problem with this is that we could get a false positive
 		// and delete something that was not legitimately part of this release.
-		return rel.Manifest, []error{fmt.Errorf("corrupted release record. You must manually delete the resources: %s", err)}
+		return rel.Manifest, []error{errors.Wrap(err, "corrupted release record. You must manually delete the resources")}
 	}
 
 	filesToKeep, filesToDelete := filterManifestsToKeep(files)

pkg/tiller/release_update.go

@@ -22,6 +22,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/hapi"
 	"k8s.io/helm/pkg/hapi/release"
@@ -31,8 +33,7 @@ import (
 // UpdateRelease takes an existing release and new information, and upgrades the release.
 func (s *ReleaseServer) UpdateRelease(req *hapi.UpdateReleaseRequest) (*release.Release, error) {
 	if err := validateReleaseName(req.Name); err != nil {
-		s.Log("updateRelease: Release name is invalid: %s", req.Name)
-		return nil, err
+		return nil, errors.Errorf("updateRelease: Release name is invalid: %s", req.Name)
 	}
 	s.Log("preparing update for %s", req.Name)
 	currentRelease, updatedRelease, err := s.prepareUpdate(req)
@@ -161,13 +162,12 @@ func (s *ReleaseServer) performUpdateForce(req *hapi.UpdateReleaseRequest) (*rel
 		Wait:         req.Wait,
 	})
 	if err != nil {
-		s.Log("failed update prepare step: %s", err)
 		// On dry run, append the manifest contents to a failed release. This is
 		// a stop-gap until we can revisit an error backchannel post-2.0.
 		if req.DryRun && strings.HasPrefix(err.Error(), "YAML parse error") {
-			err = fmt.Errorf("%s\n%s", err, newRelease.Manifest)
+			err = errors.Wrap(err, newRelease.Manifest)
 		}
-		return newRelease, err
+		return newRelease, errors.Wrap(err, "failed update prepare step")
 	}
 
 	// From here on out, the release is considered to be in StatusDeleting or StatusDeleted
@@ -194,7 +194,7 @@ func (s *ReleaseServer) performUpdateForce(req *hapi.UpdateReleaseRequest) (*rel
 	s.recordRelease(oldRelease, true)
 
 	if len(errs) > 0 {
-		return newRelease, fmt.Errorf("Upgrade --force successfully deleted the previous release, but encountered %d error(s) and cannot continue: %s", len(errs), joinErrors(errs))
+		return newRelease, errors.Errorf("upgrade --force successfully deleted the previous release, but encountered %d error(s) and cannot continue: %s", len(errs), joinErrors(errs))
 	}
 
 	// post-delete hooks

pkg/tlsutil/cfg.go

@@ -19,8 +19,9 @@ package tlsutil
 import (
 	"crypto/tls"
 	"crypto/x509"
-	"fmt"
 	"os"
+
+	"github.com/pkg/errors"
 )
 
 // Options represents configurable options used to create client and server TLS configurations.
@@ -45,9 +46,9 @@ func ClientConfig(opts Options) (cfg *tls.Config, err error) {
 	if opts.CertFile != "" || opts.KeyFile != "" {
 		if cert, err = CertFromFilePair(opts.CertFile, opts.KeyFile); err != nil {
 			if os.IsNotExist(err) {
-				return nil, fmt.Errorf("could not load x509 key pair (cert: %q, key: %q): %v", opts.CertFile, opts.KeyFile, err)
+				return nil, errors.Wrapf(err, "could not load x509 key pair (cert: %q, key: %q)", opts.CertFile, opts.KeyFile)
 			}
-			return nil, fmt.Errorf("could not read x509 key pair (cert: %q, key: %q): %v", opts.CertFile, opts.KeyFile, err)
+			return nil, errors.Wrapf(err, "could not read x509 key pair (cert: %q, key: %q)", opts.CertFile, opts.KeyFile)
 		}
 	}
 	if !opts.InsecureSkipVerify && opts.CaCertFile != "" {
@@ -67,9 +68,9 @@ func ServerConfig(opts Options) (cfg *tls.Config, err error) {
 
 	if cert, err = CertFromFilePair(opts.CertFile, opts.KeyFile); err != nil {
 		if os.IsNotExist(err) {
-			return nil, fmt.Errorf("could not load x509 key pair (cert: %q, key: %q): %v", opts.CertFile, opts.KeyFile, err)
+			return nil, errors.Wrapf(err, "could not load x509 key pair (cert: %q, key: %q)", opts.CertFile, opts.KeyFile)
 		}
-		return nil, fmt.Errorf("could not read x509 key pair (cert: %q, key: %q): %v", opts.CertFile, opts.KeyFile, err)
+		return nil, errors.Wrapf(err, "could not read x509 key pair (cert: %q, key: %q)", opts.CertFile, opts.KeyFile)
 	}
 	if opts.ClientAuth >= tls.VerifyClientCertIfGiven && opts.CaCertFile != "" {
 		if pool, err = CertPoolFromFile(opts.CaCertFile); err != nil {

pkg/tlsutil/tls.go

@@ -19,8 +19,9 @@ package tlsutil
 import (
 	"crypto/tls"
 	"crypto/x509"
-	"fmt"
 	"io/ioutil"
+
+	"github.com/pkg/errors"
 )
 
 // NewClientTLS returns tls.Config appropriate for client auth.
@@ -49,11 +50,11 @@ func NewClientTLS(certFile, keyFile, caFile string) (*tls.Config, error) {
 func CertPoolFromFile(filename string) (*x509.CertPool, error) {
 	b, err := ioutil.ReadFile(filename)
 	if err != nil {
-		return nil, fmt.Errorf("can't read CA file: %v", filename)
+		return nil, errors.Errorf("can't read CA file: %v", filename)
 	}
 	cp := x509.NewCertPool()
 	if !cp.AppendCertsFromPEM(b) {
-		return nil, fmt.Errorf("failed to append certificates from file: %s", filename)
+		return nil, errors.Errorf("failed to append certificates from file: %s", filename)
 	}
 	return cp, nil
 }
@@ -65,7 +66,7 @@ func CertPoolFromFile(filename string) (*x509.CertPool, error) {
 func CertFromFilePair(certFile, keyFile string) (*tls.Certificate, error) {
 	cert, err := tls.LoadX509KeyPair(certFile, keyFile)
 	if err != nil {
-		return nil, fmt.Errorf("can't load key pair from cert %s and key %s: %s", certFile, keyFile, err)
+		return nil, errors.Wrapf(err, "can't load key pair from cert %s and key %s", certFile, keyFile)
 	}
 	return &cert, err
 }