Add upgrade command

help.txt

@@ -1,11 +1,14 @@
 aho v%s
 
-Usage:
-  aho [options] <repo> [destination="."]
+Commands:
+  <repo> [destination]   Download a repository and generate to destination directory
+  upgrade                Upgrade aho itself to the latest version
 
 Options:
   -f, --force
   -p, --path <path>    Use a sub directory instead of the whole directory
+  -h, --help           Show this help
+  -v, --version        Show version
 
 Examples:
   aho egoist/ts-lib-starter out-folder

internal/args.go

@@ -47,7 +47,10 @@ func ParseArgs(args []string, help string, version string) (*AppArgs, error) {
 				return nil, fmt.Errorf("unknown flag: %s", arg)
 			}
 		} else {
-			if repo == "" {
+			if arg == "upgrade" {
+				Upgrade()
+				os.Exit(0)
+			} else if repo == "" {
 				repo = arg
 			} else if destination == "" {
 				destination = arg

internal/upgrade.go

@@ -0,0 +1,21 @@
+package internal
+
+import (
+	"os"
+	"os/exec"
+	"path"
+)
+
+func Upgrade() {
+	bin := os.Args[0]
+	dir := path.Dir(bin)
+
+	// Run command
+	cmd := exec.Command("bash", "-c", "curl -fsSL https://install.egoist.sh/aho.sh | bash -s -- -b "+dir)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	cmd.Run()
+
+}