About

A simple bash script to watch a git repository and pull upstream changes if available (including submodules). If there are changes, the image will be built and push into the docker registry.

Based on repo https://github.com/kolbasa/git-repo-watcher

Requirements

• Bash with Version > 3
• Tested on Ubuntu, Debian

Basically, it will work anywhere you can install Bash.

Usage

You only need the path to your git repository to start.
Make sure your local repository is tracking a remote branch, otherwise the script will fail.

This will start a script:

./lbpl -d "/path/to/your/repository"

You can also turn on submodules changes check by passing -s.

./lbpl -d "/path/to/your/repository" -s

You can buld & push image even if there are no changes in repo by passing -b.

./lbpl -d "/path/to/your/repository" -b

Folder tmpl-repo contains files build.sh and VERSION. Copy them to your repository folder and edit them. The logic for building and pushing image is written in build.sh. If VERSION file exists, then tag for image will be read from it.

Customizations

You can add your own logic to the file: lbpl-hooks

For example, you can start your specific process in case of changes:

# $1 - Git repository name
# $2 - Branch name
# $3 - Commit details
change_pulled() {
    echo "Starting process for commit: $@"
    ./your-specific-script.sh
}

If you have more than one repository you can pass a copy of the lbpl-hooks file like so:

./lbpl -d "/path/to/your/repository" -h "/path/to/your/hooks-file"

Private repositories

The script works with private repositories.

First configure a password cache with git config --global credential.helper "cache --timeout=60".
Make sure the timeout is greater than the time interval given to the script. Both are given as seconds.
The program will execute git fetch and ask for your login data. The script itself does not store passwords!

If you want it to run in the background as a daemon process, you have to execute git fetch beforehand.

Example code:

cd "/path/to/your/repository"
git config --global credential.helper "cache --timeout=60"
git fetch

# Checking exit code
if [[ $? -eq 1 ]]; then
    echo "Wrong password!" >&2
    exit 1
fi

# Disown process
./git-repo-watcher -d "/path/to/your/repository" > "/path/to/your/logfile.log" & disown