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git-watch

systemd service watching for commits in a (file-accessible) git repository and trigger an action.

Can be used to implement a primitive build server.

Install

git clone https://github.com/RandomReaper/git-watch.git
cd git-watch
sudo ./install.sh

Configuration

Configuration is done in the /etc/git-watch directory. Each git repository to be watched should have it's own configuration file.

#
# GITSRC : path of a local (== not remote, but could be a bare) repository.
# 
GITSRC="/tmp/test"

#
# GITCMD Command to be executed into the repository
# 
# If the command is inside the directory, it can be called using ./
GITCMD="md5sum *"

The systemd service is a template, so if the configuration filename is test, the service name is git-watch@test.

Example use

  • Create a git repository
cd /tmp/
git init test
cd test
echo "just a test" > test.txt
git add test.txt
git commit -a -m "Initial commit."
  • Create a config file : /etc/watch-git/test
GITSRC="/tmp/test"
GITCMD="md5sum *"
  • Start the service
sudo systemctl start git-watch@test
  • Sample output on syslog:
MMM DD HH:15:11 rr-linux systemd[1]: Starting git-watch test...
MMM DD HH:15:11 rr-linux systemd[1]: Started git-watch test.
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: Cloning into '/var/cache/git-watch/test/git'...
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: done.
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: commit a294d55d74d1d155e0faf49dcb4c265c27195cf4
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: Author: XXX <XXX@XXX.XXX>
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: Date:   ddd MMM DD HH:14:30 YYYY +0100
MMM DD HH:15:11 rr-linux git-watch(test)[PID]:     Initial commit.
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: success
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: STDOUT:
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: efbba249bd50cd2e9983a73f1af2bab7  test.txt
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: ---
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: STDERR:
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: ---
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: Setting up watches.
MMM DD HH:15:11 rr-linux git-watch(test)[PID]: Watches established.
  • Do some changes to the repository
cd /tmp/test
echo "A new line" >> test.txt
git add test.txt
git commit -a -m "testing git-watch"
  • Sample output on syslog:
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: /tmp/test/.git/refs/heads/master OPEN
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: Fetching origin
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: From /tmp/test
MMM DD HH:17:42 rr-linux git-watch(test)[PID]:    a294d55..043d415  master     -> origin/master
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: HEAD is now at 043d415 testing git-watch
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: commit 043d41528516deaa2743d3a041be7ecbf3816624
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: Author: XXX <XXX@XXX.XXX>
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: Date:   ddd MMM DD HH:17:42 YYYY +0100
MMM DD HH:17:42 rr-linux git-watch(test)[PID]:     testing git-watch
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: success
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: STDOUT:
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: ec9dba4f1af159b4e76e4f04567f4fe2  test.txt
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: ---
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: STDERR:
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: ---
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: Setting up watches.
MMM DD HH:17:42 rr-linux git-watch(test)[PID]: Watches established.