Add trac update hook.

Called from the post-receive hook

1 files changed, 82 insertions, 0 deletions

diff --git a/misc/trac-update.py b/misc/trac-update.py
new file mode 100755
index 0000000..352abce
--- /dev/null
+++ b/misc/trac-update.py
@@ -0,0 +1,82 @@
+#! /usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2011 Grzegorz Sobański
+#
+# Version: 2.0
+#
+# Git post receive script developed for mlabs
+# - adds the commits to trac
+# based on post-receive-email from git-contrib
+#
+
+import re
+import os
+import sys
+from subprocess import Popen, PIPE, call
+
+# config
+TRAC_ENV = '/home/www/alias'
+GIT_PATH = '/usr/bin/git'
+TRAC_ADMIN = '/usr/bin/trac-admin'
+REPO_NAME = '(default)'
+
+# communication with git
+
+def call_git(command, args, input=None):
+    return Popen([GIT_PATH, command] + args, stdin=PIPE, stdout=PIPE).communicate(input)[0]
+
+
+def get_new_commits(ref_updates):
+    """ Gets a list uf updates from git running post-receive,
+    we want the list of new commits to the repo, that are part
+    of the push. Even if the are in more then one ref in the push.
+
+    Basically, we are running:
+    git rev-list new1 ^old1 new2 ^old2 ^everything_else
+
+    It returns a list of commits"""
+
+    all_refs = set(call_git('for-each-ref', ['--format=%(refname)']).splitlines())
+    commands = []
+    for old, new, ref in ref_updates:
+        # branch delete, skip it
+        if re.match('0*$', new):
+            continue
+
+        commands += [new]
+        all_refs.discard(ref)
+
+        if not re.match('0*$', old):
+            # update
+            commands += ["^%s" % old]
+        # else: new - do nothing more
+
+    for ref in all_refs:
+        commands += ["^%s" % ref]
+
+    new_commits = call_git('rev-list', ['--stdin', '--reverse'], '\n'.join(commands)).splitlines()
+    return new_commits
+
+
+def handle_trac(commits):
+    if not (os.path.exists(TRAC_ENV) and os.path.isdir(TRAC_ENV)):
+        print "Trac path (%s) is not a directory." % TRAC_ENV
+
+    if len(commits) == 0:
+        return
+
+    args = [TRAC_ADMIN, TRAC_ENV, 'changeset', 'added', REPO_NAME] + commits 
+    call(args)
+
+
+# main
+if __name__ == '__main__':
+    # gather all commits, to call trac-admin only once
+    lines = sys.stdin.readlines()
+    updates = [line.split() for line in lines]
+    commits = get_new_commits(updates)
+
+    # call trac-admin
+    handle_trac(commits)
+