jsvn: add 'watch-lock' subcommand for notification when file is unlocked

jsvn

@@ -30,6 +30,7 @@
 import sys
 import os
 import re
+import time
 from subprocess import *
 
 PATH = os.environ['PATH'].split(os.pathsep)
@@ -180,6 +181,47 @@ def merge(argv, svn):
         root + '/branches/' + argv[1] + path, '.']).wait()
     return 0
 
+def watch_lock(argv, svn):
+    if len(argv) < 2:
+        return -1
+    path = argv[1]
+    if os.path.exists(path):
+        # Get the repository URL of the file being watched
+        p = Popen([svn, 'info', path], stdout=PIPE)
+        lines = p.communicate()[0].split('\n')
+        for line in lines:
+            m = re.match(r'URL: (.*)', line)
+            if m is not None:
+                path = m.group(1)
+                break
+
+    last_lock_owner = ''
+    while 1:
+        lock_owner = ''
+        p = Popen([svn, 'info', path], stdout=PIPE)
+        lines = p.communicate()[0].split('\n')
+        for line in lines:
+            m = re.match(r'Lock\sOwner:\s*(.*)', line)
+            if m is not None:
+                lock_owner = m.group(1)
+                break
+        if lock_owner == '':
+            break
+        if lock_owner != last_lock_owner:
+            sys.stdout.write('Locked by: %s\n' % lock_owner)
+            last_lock_owner = lock_owner
+        time.sleep(60)
+
+    sys.stdout.write('''
+ _   _       _            _            _ _
+| | | |_ __ | | ___   ___| | _____  __| | |
+| | | | '_ \| |/ _ \ / __| |/ / _ \/ _` | |
+| |_| | | | | | (_) | (__|   <  __/ (_| |_|
+ \___/|_| |_|_|\___/ \___|_|\_\___|\__,_(_)
+
+''')
+    return 0
+
 def main(argv):
     realsvn = findInPath('svn')
     colorsvn = findInPath('colorsvn')
@@ -218,6 +260,9 @@ def main(argv):
             sys.stdout.write(getSVNRoot(realsvn) + '\n')
             return 0
 
+        if argv[0] == "watch-lock":
+            return watch_lock(argv, realsvn)
+
         if argv[0] in ('st', 'status', 'log', 'up', 'update') \
             and colorsvn != '':
             realsvn = colorsvn