feat(cli): add --version and -v support

.goreleaser.yml

@@ -18,7 +18,7 @@ builds:
     flags:
       - -trimpath
     ldflags:
-      - -s -w
+      - -s -w -X github.com/satococoa/git-worktreeinclude/internal/cli.Version={{ .Version }}
 
 archives:
   - id: default

README.md

@@ -57,6 +57,15 @@ Example:
 
 ## Commands
 
+### `git-worktreeinclude --version`
+
+Print the installed version.
+
+```sh
+git-worktreeinclude --version
+git-worktreeinclude -v
+```
+
 ### `git-worktreeinclude apply`
 
 Uses the current worktree as target and copies from source worktree.

internal/cli/cli.go

@@ -23,6 +23,9 @@ type App struct {
 	engine *engine.Engine
 }
 
+// Version is injected at build time via ldflags. Default is for local builds.
+var Version = "dev"
+
 func New(stdout, stderr io.Writer) *App {
 	return &App{
 		stdout: stdout,
@@ -51,6 +54,7 @@ func (a *App) newRootCommand() *ucli.Command {
 	return &ucli.Command{
 		Name:           "git-worktreeinclude",
 		Usage:          "apply ignored files listed in .worktreeinclude between Git worktrees",
+		Version:        Version,
 		Writer:         a.stdout,
 		ErrWriter:      a.stderr,
 		OnUsageError:   a.onUsageError,

internal/cli/cli_integration_test.go

@@ -403,6 +403,29 @@ func TestRootCommandHelpAndNoImplicitApply(t *testing.T) {
 	}
 }
 
+func TestRootVersionFlags(t *testing.T) {
+	fx := setupFixture(t)
+	prefix := "git-worktreeinclude version "
+
+	for _, args := range [][]string{{"--version"}, {"-v"}} {
+		stdout, stderr, code := runCmd(t, fx.wt, nil, testBinary, args...)
+		if code != 0 {
+			t.Fatalf("version command failed for %v: code=%d stderr=%s", args, code, stderr)
+		}
+		if strings.TrimSpace(stderr) != "" {
+			t.Fatalf("expected empty stderr for %v, got %q", args, stderr)
+		}
+
+		line := strings.TrimSpace(stdout)
+		if !strings.HasPrefix(line, prefix) {
+			t.Fatalf("unexpected version output for %v: %q", args, line)
+		}
+		if strings.TrimSpace(strings.TrimPrefix(line, prefix)) == "" {
+			t.Fatalf("version value is empty for %v: %q", args, line)
+		}
+	}
+}
+
 func TestUnknownSubcommandAtRoot(t *testing.T) {
 	fx := setupFixture(t)
 

internal/cli/cli_unit_test.go

@@ -44,6 +44,29 @@ func TestRunRootHelp(t *testing.T) {
 	}
 }
 
+func TestRunRootVersion(t *testing.T) {
+	oldVersion := Version
+	Version = "test-version"
+	defer func() {
+		Version = oldVersion
+	}()
+
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	app := New(&stdout, &stderr)
+
+	code := app.Run([]string{"--version"})
+	if code != exitcode.OK {
+		t.Fatalf("Run returned %d, want %d", code, exitcode.OK)
+	}
+	if strings.TrimSpace(stderr.String()) != "" {
+		t.Fatalf("stderr should be empty: %q", stderr.String())
+	}
+	if got := strings.TrimSpace(stdout.String()); got != "git-worktreeinclude version test-version" {
+		t.Fatalf("stdout = %q, want %q", got, "git-worktreeinclude version test-version")
+	}
+}
+
 func TestRunApplyRejectsQuietVerbose(t *testing.T) {
 	var stdout bytes.Buffer
 	var stderr bytes.Buffer