fix(helm): fix two panics in 'helm search'

cmd/helm/helm.go

@@ -109,6 +109,15 @@ func checkArgsLength(expectedNum, actualNum int, requiredArgs ...string) error {
 	return nil
 }
 
+// requireInit is a PreRunE implementation for validating that $HELM_HOME is configured.
+func requireInit(cmd *cobra.Command, args []string) error {
+	err := requireHome()
+	if err != nil {
+		return fmt.Errorf("%s (try running 'helm init')", err)
+	}
+	return nil
+}
+
 // prettyError unwraps or rewrites certain errors to make them more user-friendly.
 func prettyError(err error) error {
 	// This is ridiculous. Why is 'grpc.rpcError' not exported? The least they

cmd/helm/init.go

@@ -76,6 +76,19 @@ func installTiller() error {
 	return nil
 }
 
+// requireHome checks to see if $HELM_HOME exists, and returns an error if it does not.
+func requireHome() error {
+	dirs := []string{homePath(), repositoryDirectory(), cacheDirectory(), localRepoDirectory()}
+	for _, d := range dirs {
+		if fi, err := os.Stat(d); err != nil {
+			return fmt.Errorf("directory %q is not configured", d)
+		} else if !fi.IsDir() {
+			return fmt.Errorf("expected %q to be a directory", d)
+		}
+	}
+	return nil
+}
+
 // ensureHome checks to see if $HELM_HOME exists
 //
 // If $HELM_HOME does not exist, this function will create it.

cmd/helm/search.go

@@ -17,10 +17,11 @@ func init() {
 }
 
 var searchCmd = &cobra.Command{
-	Use:   "search [keyword]",
-	Short: "Search for a keyword in charts",
-	Long:  "Searches the known repositories cache files for the specified search string, looks at name and keywords",
-	RunE:  search,
+	Use:     "search [keyword]",
+	Short:   "Search for a keyword in charts",
+	Long:    "Searches the known repositories cache files for the specified search string, looks at name and keywords",
+	RunE:    search,
+	PreRunE: requireInit,
 }
 
 func search(cmd *cobra.Command, args []string) error {
@@ -47,6 +48,9 @@ func searchChartRefsForPattern(search string, chartRefs map[string]*repo.ChartRe
 			matches = append(matches, k)
 			continue
 		}
+		if c.Chartfile == nil {
+			continue
+		}
 		for _, keyword := range c.Chartfile.Keywords {
 			if strings.Contains(keyword, search) {
 				matches = append(matches, k)