feat(hooks): add jujutsu (jj) version control support

Add detection and hook support for jujutsu repositories: - IsJujutsuRepo(): detects .jj directory - IsColocatedJJGit(): detects colocated jj+git repos - GetJujutsuRoot(): finds jj repo root For colocated repos (jj git init --colocate): - Install simplified hooks without staging (jj auto-commits working copy) - Worktree handling preserved for git worktrees in colocated repos For pure jj repos (no git): - Print alias instructions since jj doesn't have native hooks yet Closes: hq-ew1mbr.12 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-20 19:12:51 -08:00
parent e00f013bda
commit 2fe15e2328
4 changed files with 462 additions and 17 deletions
--- a/internal/git/jujutsu_test.go
+++ b/internal/git/jujutsu_test.go
@@ -0,0 +1,187 @@
+package git
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestIsJujutsuRepo(t *testing.T) {
+	// Save original directory
+	origDir, err := os.Getwd()
+	if err != nil {
+		t.Fatalf("Failed to get current directory: %v", err)
+	}
+	defer func() {
+		_ = os.Chdir(origDir)
+		ResetCaches()
+	}()
+
+	t.Run("not a jj repo", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		if err := os.Chdir(tmpDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		if IsJujutsuRepo() {
+			t.Error("Expected IsJujutsuRepo() to return false for non-jj directory")
+		}
+	})
+
+	t.Run("jj repo root", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		jjDir := filepath.Join(tmpDir, ".jj")
+		if err := os.Mkdir(jjDir, 0750); err != nil {
+			t.Fatalf("Failed to create .jj directory: %v", err)
+		}
+
+		if err := os.Chdir(tmpDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		if !IsJujutsuRepo() {
+			t.Error("Expected IsJujutsuRepo() to return true for jj repo root")
+		}
+	})
+
+	t.Run("jj repo subdirectory", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		jjDir := filepath.Join(tmpDir, ".jj")
+		if err := os.Mkdir(jjDir, 0750); err != nil {
+			t.Fatalf("Failed to create .jj directory: %v", err)
+		}
+		subDir := filepath.Join(tmpDir, "src", "lib")
+		if err := os.MkdirAll(subDir, 0750); err != nil {
+			t.Fatalf("Failed to create subdirectory: %v", err)
+		}
+
+		if err := os.Chdir(subDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		if !IsJujutsuRepo() {
+			t.Error("Expected IsJujutsuRepo() to return true for jj repo subdirectory")
+		}
+	})
+}
+
+func TestIsColocatedJJGit(t *testing.T) {
+	// Save original directory
+	origDir, err := os.Getwd()
+	if err != nil {
+		t.Fatalf("Failed to get current directory: %v", err)
+	}
+	defer func() {
+		_ = os.Chdir(origDir)
+		ResetCaches()
+	}()
+
+	t.Run("jj only (not colocated)", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		jjDir := filepath.Join(tmpDir, ".jj")
+		if err := os.Mkdir(jjDir, 0750); err != nil {
+			t.Fatalf("Failed to create .jj directory: %v", err)
+		}
+
+		if err := os.Chdir(tmpDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		if IsColocatedJJGit() {
+			t.Error("Expected IsColocatedJJGit() to return false for jj-only repo")
+		}
+	})
+
+	t.Run("not a repo", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		if err := os.Chdir(tmpDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		if IsColocatedJJGit() {
+			t.Error("Expected IsColocatedJJGit() to return false for non-repo")
+		}
+	})
+}
+
+func TestGetJujutsuRoot(t *testing.T) {
+	// Save original directory
+	origDir, err := os.Getwd()
+	if err != nil {
+		t.Fatalf("Failed to get current directory: %v", err)
+	}
+	defer func() {
+		_ = os.Chdir(origDir)
+		ResetCaches()
+	}()
+
+	t.Run("not a jj repo", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		if err := os.Chdir(tmpDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		_, err := GetJujutsuRoot()
+		if err == nil {
+			t.Error("Expected GetJujutsuRoot() to return error for non-jj directory")
+		}
+	})
+
+	t.Run("jj repo root", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		// Resolve symlinks for comparison (macOS /var -> /private/var)
+		tmpDir, _ = filepath.EvalSymlinks(tmpDir)
+
+		jjDir := filepath.Join(tmpDir, ".jj")
+		if err := os.Mkdir(jjDir, 0750); err != nil {
+			t.Fatalf("Failed to create .jj directory: %v", err)
+		}
+
+		if err := os.Chdir(tmpDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		root, err := GetJujutsuRoot()
+		if err != nil {
+			t.Fatalf("GetJujutsuRoot() returned error: %v", err)
+		}
+		if root != tmpDir {
+			t.Errorf("Expected root %q, got %q", tmpDir, root)
+		}
+	})
+
+	t.Run("jj repo subdirectory", func(t *testing.T) {
+		tmpDir := t.TempDir()
+		// Resolve symlinks for comparison (macOS /var -> /private/var)
+		tmpDir, _ = filepath.EvalSymlinks(tmpDir)
+
+		jjDir := filepath.Join(tmpDir, ".jj")
+		if err := os.Mkdir(jjDir, 0750); err != nil {
+			t.Fatalf("Failed to create .jj directory: %v", err)
+		}
+		subDir := filepath.Join(tmpDir, "src", "lib")
+		if err := os.MkdirAll(subDir, 0750); err != nil {
+			t.Fatalf("Failed to create subdirectory: %v", err)
+		}
+
+		if err := os.Chdir(subDir); err != nil {
+			t.Fatalf("Failed to chdir: %v", err)
+		}
+		ResetCaches()
+
+		root, err := GetJujutsuRoot()
+		if err != nil {
+			t.Fatalf("GetJujutsuRoot() returned error: %v", err)
+		}
+		if root != tmpDir {
+			t.Errorf("Expected root %q, got %q", tmpDir, root)
+		}
+	})
+}