Add method to create repository

Also disables automatic creation on open

cmd/khepri/cmd_init.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/fd0/khepri"
+)
+
+func commandInit(path string) error {
+	repo, err := khepri.CreateRepository(path)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "creating repository at %s failed: %v\n", path, err)
+		os.Exit(1)
+	}
+
+	fmt.Printf("created khepri repository at %s\n", repo.Path())
+
+	return nil
+}

cmd/khepri/main.go

@@ -4,15 +4,13 @@ import (
 	"fmt"
 	"log"
 	"os"
-	"sort"
-	"strings"
 
 	"github.com/fd0/khepri"
 	"github.com/jessevdk/go-flags"
 )
 
 var Opts struct {
-	Repo string `short:"r" long:"repo"    description:"Repository directory to backup to/restor from"`
+	Repo string `short:"r" long:"repo"    description:"Repository directory to backup to/restore from"`
 }
 
 func errx(code int, format string, data ...interface{}) {
@@ -50,18 +48,17 @@ func main() {
 		os.Exit(0)
 	}
 
-	if len(args) == 0 {
-		cmds := []string{}
-		for k := range commands {
-			cmds = append(cmds, k)
-		}
-		sort.Strings(cmds)
-		fmt.Printf("nothing to do, available commands: [%v]\n", strings.Join(cmds, "|"))
-		os.Exit(0)
-	}
-
 	cmd := args[0]
 
+	if cmd == "init" {
+		err = commandInit(Opts.Repo)
+		if err != nil {
+			errx(1, "error executing command %q: %v", cmd, err)
+		}
+
+		return
+	}
+
 	f, ok := commands[cmd]
 	if !ok {
 		errx(1, "unknown command: %q\n", cmd)
@@ -70,7 +67,7 @@ func main() {
 	repo, err := khepri.NewRepository(Opts.Repo)
 
 	if err != nil {
-		errx(1, "unable to create/open repo: %v", err)
+		errx(1, "unable to open repo: %v", err)
 	}
 
 	err = f(repo, args[1:])