docs/Containers/Docker/Docker Compose/Custom Containers/Git Repo Updater.md

Purpose: Docker container running Alpine Linux that automates and improves upon much of the script mentioned in the Git Repo Updater document. It offers the additional benefits of checking for updates every 5 seconds instead of every 60 seconds. It also accepts environment variables to provide credentials and notification settings, and can have an infinite number of monitored repositories.

Deployment

You can find the current up-to-date Gitea repository that includes the docker-compose.yml and .env files that you need to deploy everything here

version: '3.3'
services:
    git-repo-updater:
        privileged: true
        container_name: git-repo-updater
        environment:
            - REPO_URL=${REPO_URL}
            - COPY_DIR=${COPY_DIR}
            - NTFY_URL=${NTFY_URL}
            - GIT_USERNAME=${GIT_USERNAME}
            - GIT_PASSWORD=${GIT_PASSWORD}
            - TZ=America/Denver
        image: git.bunny-lab.io/container-registry/git-repo-updater:latest
        volumes:
        #This folder is where the repository will be downloaded and updated - it needs a unique folder name.
           - ${TEMP_DIR}:/root/Repo_Watcher/repo 
        #This is where you want the git repository data to be copied to (e.g. a server's data folder)
           - ${COPY_DIR}:/DATA
        restart: always

REPO_URL=https://git.bunny-lab.io/bunny-lab/placeholder.git
NTFY_URL=https://ntfy.bunny-lab.io/git-repo-updater
TEMP_DIR=/srv/containers/git-repo-updater/REPO-NAME
COPY_DIR=/srv/containers/server-name/data
GIT_USERNAME=nicole.rappe
GIT_PASSWORD=USE-AN-APP-PASSWORD

Build / Development

If you want to learn how the container was assembled, the related build files are located here

FROM ubuntu:latest

# Install necessary packages
RUN apt-get update && \
    apt-get install -y git curl rsync

# Add script
COPY repo_watcher.sh /root/Repo_Watcher/repo_watcher.sh

# Make script executable
RUN chmod +x /root/Repo_Watcher/repo_watcher.sh

# Start script
CMD ["/bin/bash", "-c", "/root/Repo_Watcher/repo_watcher.sh"]

#!/bin/bash

while true; do
  # Set Git credentials
  git config --global credential.helper 'store --file /tmp/git-credentials'
  echo "url=$REPO_URL" > /tmp/git-credentials
  echo "username=$GIT_USERNAME" >> /tmp/git-credentials
  echo "password=$GIT_PASSWORD" >> /tmp/git-credentials

  # Navigate to the watcher directory
  cd /root/Repo_Watcher

  # Clone the repo if it doesn't exist
  if [ -z "$(find /root/Repo_Watcher/repo -maxdepth 1 -mindepth 1 -type f -o -type d 2>/dev/null)" ]; then
    curl -d "Repository $REPO_URL doesn't exist locally - Downloading..." $NTFY_URL
    echo "Repository $REPO_URL doesn't exist locally - Downloading..."
    git clone $REPO_URL repo
    cd repo
    rsync -av --delete --exclude '.git/' ./ /DATA
  fi

  cd repo

  # Fetch the latest changes
  git fetch origin main

  # Check if the local repository is behind the remote
  LOCAL=$(git rev-parse @)
  REMOTE=$(git rev-parse @{u})
  BASE=$(git merge-base @ @{u})

  if [ $LOCAL = $REMOTE ]; then
      echo "Repository Up-to-Date"
  else
      curl -d "$REPO_URL Automatically Pulling Updates..." $NTFY_URL
      echo "Pulling Updates from Repository..."
      git pull origin main
      rsync -av --delete --exclude '.git/' ./ /DATA
  fi

  # Wait for 5 seconds before the next iteration
  sleep 5

done