ref(helm): fix helm update

cmd/helm/repo.go

@@ -47,7 +47,7 @@ func runRepoAdd(cmd *cobra.Command, args []string) error {
 	}
 	name, url := args[0], args[1]
 
-	if err := downloadIndexFile(name, url); err != nil {
+	if err := repo.DownloadIndexFile(name, url, cacheDirectory(name, "-index.yaml")); err != nil {
 		return errors.New("Oops! Looks like " + url + " is not a valid chart repository or cannot be reached\n")
 	}
 

cmd/helm/update.go

@@ -3,15 +3,9 @@ package main
 import (
 	"errors"
 	"fmt"
-	"io"
-	"io/ioutil"
-	"net/http"
-	"os"
-	"strings"
 	"sync"
 
 	"github.com/spf13/cobra"
-	"gopkg.in/yaml.v2"
 
 	"github.com/kubernetes/helm/pkg/repo"
 )
@@ -52,7 +46,8 @@ func updateCharts(repos map[string]string, verbose bool) {
 		wg.Add(1)
 		go func(n, u string) {
 			defer wg.Done()
-			err := downloadIndexFile(n, u)
+			indexFileName := cacheDirectory(n + "-index.yaml")
+			err := repo.DownloadIndexFile(n, u, indexFileName)
 			if err != nil {
 				updateErr := "...Unable to get an update from the " + n + " chart repository"
 				if verbose {
@@ -67,37 +62,3 @@ func updateCharts(repos map[string]string, verbose bool) {
 	wg.Wait()
 	fmt.Println("Update Complete. Happy Helming!")
 }
-
-func downloadIndexFile(name, url string) error {
-	var indexURL string
-
-	indexURL = strings.TrimSuffix(url, "/") + "/index.yaml"
-	resp, err := http.Get(indexURL)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	var indexFile *os.File
-	var r repo.RepoFile
-
-	b, err := ioutil.ReadAll(resp.Body)
-	if err != nil {
-		return err
-	}
-
-	if err := yaml.Unmarshal(b, &r); err != nil {
-		return err
-	}
-
-	indexFile, err = os.Create(cacheDirectory(name + "-index.yaml"))
-	if err != nil {
-		return err
-	}
-
-	if _, err := io.Copy(indexFile, resp.Body); err != nil {
-		return err
-	}
-
-	return nil
-}

pkg/repo/index.go

@@ -0,0 +1,51 @@
+package repo
+
+import (
+	"io/ioutil"
+	"net/http"
+	"strings"
+
+	"gopkg.in/yaml.v2"
+)
+
+// IndexFile represents the index file in a chart repository
+type IndexFile struct {
+	Entries map[string]*ChartRef
+}
+
+// ChartRef represents a chart entry in the IndexFile
+type ChartRef struct {
+	Name     string   `yaml:"name"`
+	URL      string   `yaml:"url"`
+	Keywords []string `yaml:"keywords"`
+	Removed  bool     `yaml:"removed,omitempty"`
+}
+
+// DownloadIndexFile uses
+func DownloadIndexFile(repoName, url, indexFileName string) error {
+	var indexURL string
+
+	indexURL = strings.TrimSuffix(url, "/") + "/index.yaml"
+	resp, err := http.Get(indexURL)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	var r IndexFile
+
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+
+	if err := yaml.Unmarshal(b, &r); err != nil {
+		return err
+	}
+
+	if err := ioutil.WriteFile(indexFileName, b, 0644); err != nil {
+		return err
+	}
+
+	return nil
+}

pkg/repo/index_test.go

@@ -0,0 +1,56 @@
+package repo
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"gopkg.in/yaml.v2"
+)
+
+var (
+	testRepo = "test-repo"
+)
+
+func TestDownloadIndexFile(t *testing.T) {
+	fileBytes, err := ioutil.ReadFile("testdata/local-index.yaml")
+	if err != nil {
+		t.Errorf("%#v", err)
+	}
+
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "binary/octet-stream")
+		fmt.Fprintln(w, string(fileBytes))
+	}))
+
+	dirName, err := ioutil.TempDir("testdata", "tmp")
+	path := filepath.Join(dirName, testRepo+"-index.yaml")
+	if err := DownloadIndexFile(testRepo, ts.URL, path); err != nil {
+		t.Errorf("%#v", err)
+	}
+
+	if _, err := os.Stat(path); err != nil {
+		t.Errorf("error finding created index file: %#v", err)
+	}
+
+	b, err := ioutil.ReadFile(path)
+	if err != nil {
+		t.Errorf("error reading index file: %#v", err)
+	}
+
+	var i IndexFile
+	if err = yaml.Unmarshal(b, &i); err != nil {
+		t.Errorf("error unmarshaling index file: %#v", err)
+	}
+
+	numEntries := len(i.Entries)
+	if numEntries != 2 {
+		t.Errorf("Expected 2 entries in index file but got %v", numEntries)
+	}
+	os.Remove(path)
+
+}

pkg/repo/local.go

@@ -13,19 +13,6 @@ import (
 
 var localRepoPath string
 
-// IndexFile represents the index file in a chart repository
-type IndexFile struct {
-	Entries map[string]*ChartRef
-}
-
-// ChartRef represents a chart entry in the IndexFile
-type ChartRef struct {
-	Name     string   `yaml:"name"`
-	URL      string   `yaml:"url"`
-	Keywords []string `yaml:"keywords"`
-	Removed  bool     `yaml:"removed,omitempty"`
-}
-
 // StartLocalRepo starts a web server and serves files from the given path
 func StartLocalRepo(path string) {
 	fmt.Println("Now serving you on localhost:8879...")