feat: Add --remote (#1387)

Co-authored-by: anqiansong <anqiansong@bytedance.com>

tools/goctl/util/file.go

@@ -17,6 +17,7 @@ import (
 const (
 	NL       = "\n"
 	goctlDir = ".goctl"
+	gitDir   = ".git"
 )
 
 var goctlHome string
@@ -82,6 +83,16 @@ func GetGoctlHome() (string, error) {
 	return filepath.Join(home, goctlDir), nil
 }
 
+// GetGitHome returns the git home of goctl.
+func GetGitHome() (string, error) {
+	goctlH, err := GetGoctlHome()
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(goctlH, gitDir), nil
+}
+
 // GetTemplateDir returns the category path value in GoctlHome where could get it by GetGoctlHome
 func GetTemplateDir(category string) (string, error) {
 	goctlHome, err := GetGoctlHome()

tools/goctl/util/file_test.go

@@ -0,0 +1,23 @@
+package util
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetGitHome(t *testing.T) {
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return
+	}
+	actual, err := GetGitHome()
+	if err != nil {
+		return
+	}
+
+	expected := filepath.Join(homeDir, goctlDir, gitDir)
+	assert.Equal(t, expected, actual)
+}

tools/goctl/util/git.go

@@ -0,0 +1,36 @@
+package util
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/tal-tech/go-zero/tools/goctl/util/env"
+)
+
+func CloneIntoGitHome(url string) (dir string, err error) {
+	gitHome, err := GetGitHome()
+	if err != nil {
+		return "", err
+	}
+	os.RemoveAll(gitHome)
+	ext := filepath.Ext(url)
+	repo := strings.TrimSuffix(filepath.Base(url), ext)
+	dir = filepath.Join(gitHome, repo)
+	path, err := env.LookPath("git")
+	if err != nil {
+		return "", err
+	}
+	if !env.CanExec() {
+		return "", fmt.Errorf("os %q can not call 'exec' command", runtime.GOOS)
+	}
+	cmd := exec.Command(path, "clone", url, dir)
+	cmd.Env = os.Environ()
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err = cmd.Run()
+	return
+}