fix: lock-mgr get key from arg instead of env

lock-mgr/main.go

@@ -121,7 +121,7 @@ func releaseMgrLock(mgrPath string) error {
 	return writeLockFile(mgrPath, lf)
 }
 
-func cmdAcquire(mgrPath, filePath string) error {
+func cmdAcquire(mgrPath, filePath, key string) error {
 	// Steps 3-8: acquire meta-lock
 	if _, err := acquireMgrLock(mgrPath); err != nil {
 		return err
@@ -145,10 +145,8 @@ func cmdAcquire(mgrPath, filePath string) error {
 			xKey = entry.Key
 		}
 
-		envKey := os.Getenv("LOCK_MGR_KEY")
-
 		// Step 11: if locked by someone else, wait and retry
-		if xLocked && xKey != envKey {
+		if xLocked && xKey != key {
 			if time.Since(startTime) > 30*time.Second {
 				_ = releaseMgrLock(mgrPath)
 				return fmt.Errorf("timeout waiting to acquire lock on %s", filePath)
@@ -165,23 +163,12 @@ func cmdAcquire(mgrPath, filePath string) error {
 			continue
 		}
 
-		// Step 12: not locked (or already owned by us) — acquire
+		// Step 12: not locked (or already owned by caller's key) — acquire
-		var newKey string
-		if envKey != "" {
-			newKey = envKey
-		} else {
-			newKey, err = generateUUID()
-			if err != nil {
-				_ = releaseMgrLock(mgrPath)
-				return err
-			}
-		}
-
 		if lf[filePath] == nil {
 			lf[filePath] = &LockEntry{}
 		}
 		lf[filePath].Locked = true
-		lf[filePath].Key = newKey
+		lf[filePath].Key = key
 		lf[filePath].Time = time.Now().UTC().Format(time.RFC3339)
 
 		// Step 13: delete meta-lock entry and write atomically
@@ -190,12 +177,11 @@ func cmdAcquire(mgrPath, filePath string) error {
 			return err
 		}
 
-		fmt.Println(newKey)
 		return nil
 	}
 }
 
-func cmdRelease(mgrPath, filePath string) error {
+func cmdRelease(mgrPath, filePath, key string) error {
 	// Steps 3-8: acquire meta-lock
 	if _, err := acquireMgrLock(mgrPath); err != nil {
 		return err
@@ -214,20 +200,14 @@ func cmdRelease(mgrPath, filePath string) error {
 		xKey = entry.Key
 	}
 
-	envKey := os.Getenv("LOCK_MGR_KEY")
-
 	// Step 14: validate preconditions
-	if envKey == "" {
-		_ = releaseMgrLock(mgrPath)
-		return fmt.Errorf("LOCK_MGR_KEY environment variable not set")
-	}
 	if !xLocked {
 		_ = releaseMgrLock(mgrPath)
 		return fmt.Errorf("file %s is not locked", filePath)
 	}
-	if xKey != envKey {
+	if xKey != key {
 		_ = releaseMgrLock(mgrPath)
-		return fmt.Errorf("LOCK_MGR_KEY does not match the lock key for %s", filePath)
+		return fmt.Errorf("key does not match the lock key for %s", filePath)
 	}
 
 	// Step 15: delete file lock and meta-lock, write
@@ -255,13 +235,32 @@ func cmdForceUnlock(mgrPath, filePath string) error {
 }
 
 func main() {
-	if len(os.Args) < 3 {
+	action := ""
-		fmt.Fprintln(os.Stderr, "Usage: lock-mgr <acquire|release|force-unlock> <file>")
+	if len(os.Args) >= 2 {
+		action = os.Args[1]
+	}
+
+	// force-unlock only needs 2 args
+	if action == "force-unlock" && len(os.Args) < 3 {
+		fmt.Fprintln(os.Stderr, "Usage: lock-mgr force-unlock <file>")
+		os.Exit(1)
+	}
+	// acquire and release need 3 args
+	if (action == "acquire" || action == "release") && len(os.Args) < 4 {
+		fmt.Fprintf(os.Stderr, "Usage: lock-mgr %s <file> <key>\n", action)
+		os.Exit(1)
+	}
+	if action == "" || (action != "acquire" && action != "release" && action != "force-unlock") {
+		fmt.Fprintln(os.Stderr, "Usage: lock-mgr <acquire|release> <file> <key>")
+		fmt.Fprintln(os.Stderr, "       lock-mgr force-unlock <file>")
 		os.Exit(1)
 	}
 
-	action := os.Args[1]
 	fileArg := os.Args[2]
+	key := ""
+	if action != "force-unlock" {
+		key = os.Args[3]
+	}
 
 	// Step 1: resolve tool directory and locate (or create) the lock file
 	execPath, err := os.Executable()
@@ -296,15 +295,11 @@ func main() {
 
 	switch action {
 	case "acquire":
-		err = cmdAcquire(mgrPath, filePath)
+		err = cmdAcquire(mgrPath, filePath, key)
 	case "release":
-		err = cmdRelease(mgrPath, filePath)
+		err = cmdRelease(mgrPath, filePath, key)
 	case "force-unlock":
 		err = cmdForceUnlock(mgrPath, filePath)
-	default:
-		fmt.Fprintf(os.Stderr, "error: unknown action %q\n", action)
-		fmt.Fprintln(os.Stderr, "Usage: lock-mgr <acquire|release|force-unlock> <file>")
-		os.Exit(1)
 	}
 
 	if err != nil {