use constants from chartutil

This way, there's less overall code duplication.

cmd/helm/lint.go

@@ -17,7 +17,6 @@ limitations under the License.
 package main
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -69,7 +68,7 @@ func newLintCmd(out io.Writer) *cobra.Command {
 	return cmd
 }
 
-var errLintNoChart = errors.New("No chart found for linting (missing Chart.yaml)")
+var errLintNoChart = fmt.Errorf("No chart found for linting (missing %s)", chartutil.ChartfileName)
 
 func (l *lintCmd) run() error {
 	var lowestTolerance int
@@ -142,7 +141,7 @@ func lintChart(path string) (support.Linter, error) {
 	}
 
 	// Guard: Error out of this is not a chart.
-	if _, err := os.Stat(filepath.Join(chartPath, "Chart.yaml")); err != nil {
+	if _, err := os.Stat(filepath.Join(chartPath, chartutil.ChartfileName)); err != nil {
 		return linter, errLintNoChart
 	}
 

cmd/helm/package.go

@@ -140,7 +140,7 @@ func (p *packageCmd) run() 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 fmt.Errorf("directory name (%s) and %s name (%s) must match", filepath.Base(path), chartutil.ChartfileName, ch.Metadata.Name)
 	}
 
 	if reqs, err := chartutil.LoadRequirements(ch); err == nil {

pkg/chartutil/chartfile.go

@@ -17,7 +17,6 @@ limitations under the License.
 package chartutil
 
 import (
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -73,14 +72,14 @@ func IsChartDir(dirName string) (bool, error) {
 		return false, fmt.Errorf("%q is not a directory", dirName)
 	}
 
-	chartYaml := filepath.Join(dirName, "Chart.yaml")
+	chartYaml := filepath.Join(dirName, ChartfileName)
 	if _, err := os.Stat(chartYaml); os.IsNotExist(err) {
-		return false, fmt.Errorf("no Chart.yaml exists in directory %q", dirName)
+		return false, fmt.Errorf("no %s exists in directory %q", ChartfileName, dirName)
 	}
 
 	chartYamlContent, err := ioutil.ReadFile(chartYaml)
 	if err != nil {
-		return false, fmt.Errorf("cannot read Chart.Yaml in directory %q", dirName)
+		return false, fmt.Errorf("cannot read %s in directory %q", ChartfileName, dirName)
 	}
 
 	chartContent, err := UnmarshalChartfile(chartYamlContent)
@@ -88,10 +87,10 @@ func IsChartDir(dirName string) (bool, error) {
 		return false, err
 	}
 	if chartContent == nil {
-		return false, errors.New("chart metadata (Chart.yaml) missing")
+		return false, ErrChartMetadataMissing
 	}
 	if chartContent.Name == "" {
-		return false, errors.New("invalid chart (Chart.yaml): name must not be empty")
+		return false, ErrChartNameEmpty
 	}
 
 	return true, nil

pkg/chartutil/errors.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package chartutil
+
+import (
+	"fmt"
+)
+
+var (
+	// ErrChartMetadataMissing is raised when a Chart.yaml is missing from a chart.
+	ErrChartMetadataMissing = fmt.Errorf("chart metadata (%s) missing", ChartfileName)
+	// ErrChartNameEmpty is raised when a name is not specified in a Chart.yaml.
+	ErrChartNameEmpty = fmt.Errorf("invalid chart (%s): name must not be empty", ChartfileName)
+	// ErrChartVersionEmpty is raised when a version is not specified in a Chart.yaml.
+	ErrChartVersionEmpty = fmt.Errorf("invalid chart (%s): version must not be empty", ChartfileName)
+)

pkg/chartutil/load.go

@@ -99,7 +99,7 @@ func LoadArchive(in io.Reader) (*chart.Chart, error) {
 		// Normalize the path to the / delimiter
 		n = strings.Replace(n, delimiter, "/", -1)
 
-		if parts[0] == "Chart.yaml" {
+		if parts[0] == ChartfileName {
 			return nil, errors.New("chart yaml not in base directory")
 		}
 
@@ -124,7 +124,7 @@ func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
 	subcharts := map[string][]*BufferedFile{}
 
 	for _, f := range files {
-		if f.Name == "Chart.yaml" {
+		if f.Name == ChartfileName {
 			m, err := UnmarshalChartfile(f.Data)
 			if err != nil {
 				return c, err
@@ -132,16 +132,16 @@ func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
 			c.Metadata = m
 		} else if f.Name == "values.toml" {
 			return c, errors.New("values.toml is illegal as of 2.0.0-alpha.2")
-		} else if f.Name == "values.yaml" {
+		} else if f.Name == ValuesfileName {
 			c.Values = &chart.Config{Raw: string(f.Data)}
-		} else if strings.HasPrefix(f.Name, "templates/") {
+		} else if strings.HasPrefix(f.Name, TemplatesDir+"/") {
 			c.Templates = append(c.Templates, &chart.Template{Name: f.Name, Data: f.Data})
-		} else if strings.HasPrefix(f.Name, "charts/") {
+		} else if strings.HasPrefix(f.Name, ChartsDir+"/") {
 			if filepath.Ext(f.Name) == ".prov" {
 				c.Files = append(c.Files, &any.Any{TypeUrl: f.Name, Value: f.Data})
 				continue
 			}
-			cname := strings.TrimPrefix(f.Name, "charts/")
+			cname := strings.TrimPrefix(f.Name, ChartsDir+"/")
 			if strings.IndexAny(cname, "._") == 0 {
 				// Ignore charts/ that start with . or _.
 				continue
@@ -156,10 +156,10 @@ func LoadFiles(files []*BufferedFile) (*chart.Chart, error) {
 
 	// Ensure that we got a Chart.yaml file
 	if c.Metadata == nil {
-		return c, errors.New("chart metadata (Chart.yaml) missing")
+		return c, ErrChartMetadataMissing
 	}
 	if c.Metadata.Name == "" {
-		return c, errors.New("invalid chart (Chart.yaml): name must not be empty")
+		return c, ErrChartNameEmpty
 	}
 
 	for n, files := range subcharts {

pkg/chartutil/load_test.go

@@ -101,7 +101,7 @@ icon: https://example.com/64x64.png
 	if err == nil {
 		t.Fatal("Expected err to be non-nil")
 	}
-	if err.Error() != "chart metadata (Chart.yaml) missing" {
+	if err != ErrChartMetadataMissing {
 		t.Errorf("Expected chart metadata missing error, got '%s'", err.Error())
 	}
 

pkg/chartutil/save.go

@@ -19,7 +19,6 @@ package chartutil
 import (
 	"archive/tar"
 	"compress/gzip"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -103,14 +102,14 @@ func Save(c *chart.Chart, outDir string) (string, error) {
 	}
 
 	if c.Metadata == nil {
-		return "", errors.New("no Chart.yaml data")
+		return "", ErrChartMetadataMissing
 	}
 
 	cfile := c.Metadata
 	if cfile.Name == "" {
-		return "", errors.New("no chart name specified (Chart.yaml)")
+		return "", ErrChartNameEmpty
 	} else if cfile.Version == "" {
-		return "", errors.New("no chart version specified (Chart.yaml)")
+		return "", ErrChartVersionEmpty
 	}
 
 	filename := fmt.Sprintf("%s-%s.tgz", cfile.Name, cfile.Version)
@@ -159,13 +158,13 @@ func writeTarContents(out *tar.Writer, c *chart.Chart, prefix string) error {
 	if err != nil {
 		return err
 	}
-	if err := writeToTar(out, base+"/Chart.yaml", cdata); err != nil {
+	if err := writeToTar(out, base+"/"+ChartfileName, cdata); err != nil {
 		return err
 	}
 
 	// Save values.yaml
 	if c.Values != nil && len(c.Values.Raw) > 0 {
-		if err := writeToTar(out, base+"/values.yaml", []byte(c.Values.Raw)); err != nil {
+		if err := writeToTar(out, base+"/"+ValuesfileName, []byte(c.Values.Raw)); err != nil {
 			return err
 		}
 	}
@@ -188,7 +187,7 @@ func writeTarContents(out *tar.Writer, c *chart.Chart, prefix string) error {
 
 	// Save dependencies
 	for _, dep := range c.Dependencies {
-		if err := writeTarContents(out, dep, base+"/charts"); err != nil {
+		if err := writeTarContents(out, dep, base+"/"+ChartsDir); err != nil {
 			return err
 		}
 	}

pkg/lint/rules/chartfile.go

@@ -33,29 +33,28 @@ import (
 
 // Chartfile runs a set of linter rules related to Chart.yaml file
 func Chartfile(linter *support.Linter) {
-	chartFileName := "Chart.yaml"
+	chartPath := filepath.Join(linter.ChartDir, chartutil.ChartfileName)
-	chartPath := filepath.Join(linter.ChartDir, chartFileName)
 
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartYamlNotDirectory(chartPath))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartYamlNotDirectory(chartPath))
 
 	chartFile, err := chartutil.LoadChartfile(chartPath)
-	validChartFile := linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartYamlFormat(err))
+	validChartFile := linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartYamlFormat(err))
 
 	// Guard clause. Following linter rules require a parseable ChartFile
 	if !validChartFile {
 		return
 	}
 
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartName(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartName(chartFile))
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartNameDirMatch(linter.ChartDir, chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartNameDirMatch(linter.ChartDir, chartFile))
 
 	// Chart metadata
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartVersion(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartVersion(chartFile))
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartEngine(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartEngine(chartFile))
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartMaintainer(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartMaintainer(chartFile))
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartSources(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartSources(chartFile))
-	linter.RunLinterRule(support.InfoSev, chartFileName, validateChartIconPresence(chartFile))
+	linter.RunLinterRule(support.InfoSev, chartutil.ChartfileName, validateChartIconPresence(chartFile))
-	linter.RunLinterRule(support.ErrorSev, chartFileName, validateChartIconURL(chartFile))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ChartfileName, validateChartIconURL(chartFile))
 }
 
 func validateChartYamlNotDirectory(chartPath string) error {

pkg/lint/rules/template.go

@@ -32,7 +32,7 @@ import (
 
 // Templates lints the templates in the Linter.
 func Templates(linter *support.Linter) {
-	path := "templates/"
+	path := chartutil.TemplatesDir + "/"
 	templatesPath := filepath.Join(linter.ChartDir, path)
 
 	templatesDirExist := linter.RunLinterRule(support.WarningSev, path, validateTemplatesDir(templatesPath))

pkg/lint/rules/values.go

@@ -27,15 +27,14 @@ import (
 
 // Values lints a chart's values.yaml file.
 func Values(linter *support.Linter) {
-	file := "values.yaml"
+	vf := filepath.Join(linter.ChartDir, chartutil.ValuesfileName)
-	vf := filepath.Join(linter.ChartDir, file)
+	fileExists := linter.RunLinterRule(support.InfoSev, chartutil.ValuesfileName, validateValuesFileExistence(linter, vf))
-	fileExists := linter.RunLinterRule(support.InfoSev, file, validateValuesFileExistence(linter, vf))
 
 	if !fileExists {
 		return
 	}
 
-	linter.RunLinterRule(support.ErrorSev, file, validateValuesFile(linter, vf))
+	linter.RunLinterRule(support.ErrorSev, chartutil.ValuesfileName, validateValuesFile(linter, vf))
 }
 
 func validateValuesFileExistence(linter *support.Linter, valuesPath string) error {