jsvn: add "update" subcommand handler for colorized output

jsvn

@@ -472,6 +472,46 @@ def log(argv, svn, out):
             out.write(line)
     return RET_OK
 
+def update(argv, svn, out):
+    external = ''
+    external_printed = True
+    pout = Popen([svn] + argv, stdout=PIPE).stdout
+    for line in iter(pout.readline, ''):
+        m = re.match(r"Fetching external item into '(.*)':", line)
+        if m is not None:
+            external = m.group(1)
+            external_printed = False
+            continue
+        if re.match(r'\s*$', line):
+            continue
+        if re.search(r'^External at revision ', line):
+            if external_printed:
+                out.write(line)
+            continue
+        if re.search(r'^(Updated.to|At) revision', line):
+            out.write(line)
+            continue
+
+        # anything not matched yet will cause an external to be shown
+        if not external_printed:
+            out.write("\nExternal '%s':\n" % external)
+            external_printed = True
+        if re.match(r'[ADUCGER ]{2}[B ][C ] ', line):
+            action = line[0]
+            if action == 'A':
+                ansi_color(out, 'green')
+            elif action == 'D':
+                ansi_color(out, 'red')
+            elif action == 'C':
+                ansi_color(out, 'yellow')
+            elif action == 'G':
+                ansi_color(out, 'cyan')
+            out.write(line)
+            ansi_reset(out)
+            continue
+        out.write(line)
+    return RET_OK
+
 def root(argv, svn, out):
     sys.stdout.write(getSVNRoot(svn) + '\n')
     return RET_OK
@@ -513,6 +553,8 @@ def main(argv):
             'diff': diff,
             'log': log,
             'root': root,
+            'up': update,
+            'update': update,
             'watch-lock': watch_lock,
             'users': users,
             'binaries': binaries,
@@ -526,7 +568,7 @@ def main(argv):
             if r == RET_OK or r == RET_ERR:
                 do_normal_exec = False
 
-        if (argv[0] in ('st', 'status', 'up', 'update')
+        if (argv[0] in ('st', 'status')
             and colorsvn != ''):
             realsvn = colorsvn