update env var expansion logic

cmd/mg/cmd/common.go

@@ -3,7 +3,6 @@ package cmd
 import (
 	"log"
 	"os"
-	"strings"
 
 	"github.com/taigrr/mg/parse"
 )
@@ -28,11 +27,6 @@ func GetConfig() parse.MGConfig {
 			}
 		}
 	}
-	homeDir, _ := os.UserHomeDir()
-	for i, repo := range conf.Repos {
-		if strings.HasPrefix(repo.Path, "$HOME") {
-			conf.Repos[i].Path = strings.Replace(repo.Path, "$HOME", homeDir, 1)
-		}
-	}
+	conf.ExpandPaths()
 	return conf
 }

cmd/mg/cmd/register.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"log"
 	"os"
-	"strings"
 
 	git "github.com/go-git/go-git/v5"
 	"github.com/spf13/cobra"
@@ -54,15 +53,6 @@ var registerCmd = &cobra.Command{
 		}
 		path = newPath.Filesystem.Root()
 
-		homeDir, err := os.UserHomeDir()
-		if err != nil {
-			log.Println("Unable to get home directory")
-			os.Exit(1)
-		}
-		if strings.HasPrefix(path, homeDir) {
-			path = "$HOME" + path[len(homeDir):]
-		}
-
 		for _, v := range conf.Repos {
 			if v.Path == path {
 				fmt.Printf("repo %s already registered\n", path)

cmd/mg/cmd/root.go

@@ -2,14 +2,44 @@ package cmd
 
 import (
 	"os"
+	"runtime/debug"
 
 	"github.com/spf13/cobra"
 )
 
+func getVersion() string {
+	info, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "dev"
+	}
+	if info.Main.Version != "" && info.Main.Version != "(devel)" {
+		return info.Main.Version
+	}
+	var revision, dirty string
+	for _, s := range info.Settings {
+		switch s.Key {
+		case "vcs.revision":
+			revision = s.Value
+		case "vcs.modified":
+			if s.Value == "true" {
+				dirty = "-dirty"
+			}
+		}
+	}
+	if revision != "" {
+		if len(revision) > 7 {
+			revision = revision[:7]
+		}
+		return revision + dirty
+	}
+	return "dev"
+}
+
 // rootCmd represents the base command when called without any subcommands
 var rootCmd = &cobra.Command{
-	Use:   "mg",
-	Short: "go replacement for myrepos which only supports git repos",
+	Use:     "mg",
+	Short:   "go replacement for myrepos which only supports git repos",
+	Version: getVersion(),
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.