feat(helm): add serve command to start local repo

cmd/helm/serve.go

+package main
+
+import (
+	"os"
+
+	"github.com/deis/tiller/pkg/repo"
+	"github.com/spf13/cobra"
+)
+
+var serveDesc = `This command starts a local chart repository server that serves the charts saved in your $HELM_HOME/local/ directory.`
+
+//TODO: add repoPath flag to be passed in in case you want
+//  to serve charts from a different local dir
+
+func init() {
+	RootCommand.AddCommand(serveCmd)
+}
+
+var serveCmd = &cobra.Command{
+	Use:   "serve",
+	Short: "Start a local http web server",
+	Long:  serveDesc,
+	Run:   ServeLocal,
+}
+
+func ServeLocal(cmd *cobra.Command, args []string) {
+	localRepoPath := os.ExpandEnv(helmHome) + "/local/"
+	repo.StartLocalRepo(localRepoPath)
+}

pkg/repo/localRepo.go

+package repo
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+var localRepoPath string
+
+func StartLocalRepo(path string) {
+	fmt.Println("Now serving you on localhost:8879...")
+	localRepoPath = path
+	http.HandleFunc("/", homeHandler)
+	http.HandleFunc("/charts/", indexHandler)
+	http.ListenAndServe(":8879", nil)
+}
+func homeHandler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Welcome to the Kubernetes Package manager!\nBrowse charts on localhost:8879/charts!")
+}
+func indexHandler(w http.ResponseWriter, r *http.Request) {
+	file := r.URL.Path[len("/charts/"):]
+	if len(strings.Split(file, ".")) > 1 {
+		serveFile(w, r, file)
+	} else if file == "" {
+		fmt.Fprintf(w, "list of charts should be here at some point")
+	} else if file == "cache" {
+		fmt.Fprintf(w, "cache file data should be here at some point")
+	} else {
+		fmt.Fprintf(w, "Ummm... Nothing to see here folks")
+	}
+}
+
+func serveFile(w http.ResponseWriter, r *http.Request, file string) {
+	http.ServeFile(w, r, localRepoPath+file)
+}