feat: add gogit-http-server command

This starts a simple http server that serves repositories from the
given directory.

Author: aymanbagabas

cmd/gogit-http-server/main.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"net/http"
+	"path/filepath"
+
+	"github.com/go-git/go-billy/v5/osfs"
+	githttp "github.com/go-git/go-git/v6/plumbing/http"
+	"github.com/go-git/go-git/v6/plumbing/transport"
+	"github.com/spf13/cobra"
+)
+
+var port int
+
+func init() {
+	rootCmd.Flags().IntVarP(&port, "port", "p", 8080, "Port to run the HTTP server on")
+}
+
+var rootCmd = &cobra.Command{
+	Use:   "gogit-http-server [options] <directory>",
+	Short: "Run a Go Git HTTP server",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		directory := args[0]
+		addr := fmt.Sprintf(":%d", port)
+		abs, err := filepath.Abs(directory)
+		if err != nil {
+			return fmt.Errorf("failed to get absolute path: %w", err)
+		}
+
+		log.Printf("Using absolute path: %q", abs)
+		loader := transport.NewFilesystemLoader(osfs.New(abs, osfs.WithBoundOS()), false)
+		handler := &githttp.Handler{
+			Loader:   loader,
+			ErrorLog: log.Default(),
+		}
+		log.Printf("Starting server on %q for directory %q", addr, directory)
+		if err := http.ListenAndServe(addr, handler); !errors.Is(err, http.ErrServerClosed) {
+			return err
+		}
+		return nil
+	},
+}
+
+func main() {
+	if err := rootCmd.Execute(); err != nil {
+		log.Fatal(err)
+	}
+}