redesign to use force pushes only if necessary, to avoid race conditions, and to...

[git-mirror.git] / githook.py

diff --git a/githook.py b/githook.py
new file mode 100755 (executable)
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--- /dev/null
+++ b/githook.py
@@ -0,0 +1,51 @@
+#!/usr/bin/python3
+# Copyright (c) 2014, Ralf Jung <post@ralfj.de>
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 
+# 1. Redistributions of source code must retain the above copyright notice, this
+#    list of conditions and the following disclaimer. 
+# 2. Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#==============================================================================
+
+# This is the hook called by git post-commit. It updats all mirrors to the status of the local repository.
+import traceback
+from git_mirror import *
+
+if __name__ == "__main__":
+    repo = None # we will try to use this during exception handling
+    try:
+        repos = load_repos()
+        
+        # find the repository we are dealing with
+        reponame = find_repo_by_directory(repos, os.getcwd())
+        if reponame is None or reponame not in repos:
+            raise Exception("Unknown repository.")
+        
+        # now sync this repository
+        repo = repos[reponame]
+        # parse the information we get from stdin. we trust this information.
+        for line in sys.stdin:
+            (oldsha, newsha, ref) = line.split()
+            repo.update_mirrors(ref, oldsha, newsha)
+    except Exception as e:
+        if repo is not None:
+            repo.mail_owner("There was a problem running the git-mirror git hook:\n\n{0}".format(traceback.format_exc()))
+        # do not print all the details
+        sys.stderr.write("We have a problem:\n{0}".format('\n'.join(traceback.format_exception_only(type(e), e))))
+