Harden git watcher test setup (#18)

Author: Patel230

git/watcher_test.go

@@ -17,24 +17,29 @@ func setupTestRepo(t *testing.T) (string, storage.Storage, graph.Graph) {
 	t.Helper()
 	dir := t.TempDir()
 
-	// Initialize a git repo
+	runGit := func(args ...string) {
+		t.Helper()
+		cmd := exec.Command("git", args...)
+		out, err := cmd.CombinedOutput()
+		if err != nil {
+			t.Fatalf("git %v: %s: %v", args, out, err)
+		}
+	}
+
 	cmd := exec.Command("git", "init", dir)
 	if out, err := cmd.CombinedOutput(); err != nil {
 		t.Fatalf("git init: %s: %v", out, err)
 	}
 
-	// Configure git user for commits
-	cmd = exec.Command("git", "-C", dir, "config", "user.email", "test@test.com")
-	cmd.Run()
-	cmd = exec.Command("git", "-C", dir, "config", "user.name", "Test")
-	cmd.Run()
+	runGit("-C", dir, "config", "user.email", "test@test.com")
+	runGit("-C", dir, "config", "user.name", "Test")
+	runGit("-C", dir, "config", "commit.gpgsign", "false")
 
-	// Create a file and initial commit
 	if err := os.WriteFile(filepath.Join(dir, "main.go"), []byte("package main\n"), 0o644); err != nil {
 		t.Fatal(err)
 	}
-	exec.Command("git", "-C", dir, "add", ".").Run()
-	exec.Command("git", "-C", dir, "commit", "-m", "init").Run()
+	runGit("-C", dir, "add", ".")
+	runGit("-C", dir, "commit", "-m", "init")
 
 	dbDir := t.TempDir()
 	store, err := storage.NewStore(filepath.Join(dbDir, "test.db"))