106 lines
4.0 KiB
Markdown
106 lines
4.0 KiB
Markdown
**Purpose**: Docker container running Alpine Linux that automates and improves upon much of the script mentioned in the [Git Repo Updater](https://docs.bunny-lab.io/Scripts/Bash/Git%20Repo%20Updater) 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.
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### Deployment
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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](https://git.bunny-lab.io/container-registry/-/packages/container/git-repo-updater/latest)
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```jsx title="docker-compose.yml"
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version: '3.3'
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services:
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git-repo-updater:
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privileged: true
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container_name: git-repo-updater
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env_file:
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- stack.env
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image: git.bunny-lab.io/container-registry/git-repo-updater:latest
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volumes:
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- /srv/containers:/srv/containers
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- /srv/containers/git-repo-updater/Repo_Cache:/root/Repo_Cache
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restart: always
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```
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```jsx title=".env"
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# Gitea Credentials
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GIT_USERNAME=nicole.rappe
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GIT_PASSWORD=USE-AN-APP-PASSWORD
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# NTFY Push Notification Server URL
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NTFY_URL=https://ntfy.cyberstrawberry.net/git-repo-updater
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# Repository/Destination Pairs (Add as Many as Needed)
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REPO_01="https://${GIT_USERNAME}:${GIT_PASSWORD}@git.bunny-lab.io/bunny-lab/docs.git,/srv/containers/material-mkdocs/docs/docs"
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REPO_02="https://${GIT_USERNAME}:${GIT_PASSWORD}@git.bunny-lab.io/GitOps/servers.bunny-lab.io.git,/srv/containers/homepage-docker"
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```
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### Build / Development
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If you want to learn how the container was assembled, the related build files are located [here](https://git.cyberstrawberry.net/container-registry/git-repo-updater)
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```jsx title="Dockerfile"
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# Use Alpine as the base image of the container
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FROM alpine:latest
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# Install necessary packages
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RUN apk --no-cache add git curl rsync
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# Add script
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COPY repo_watcher.sh /repo_watcher.sh
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RUN chmod +x /repo_watcher.sh
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#Create Directory to store Repositories
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RUN mkdir -p /root/Repo_Cache
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# Start script (Alpine uses /bin/sh instead of /bin/bash)
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CMD ["/bin/sh", "-c", "/repo_watcher.sh"]
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```
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```jsx title="repo_watcher.sh"
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#!/bin/sh
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# Function to process each repo-destination pair
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process_repo() {
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FULL_REPO_URL=$1
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DESTINATION=$2
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# Extract the URL without credentials for logging and notifications
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CLEAN_REPO_URL=$(echo "$FULL_REPO_URL" | sed 's/https:\/\/[^@]*@/https:\/\//')
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# Directory to hold the repository locally
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REPO_DIR="/root/Repo_Cache/$(basename $CLEAN_REPO_URL .git)"
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# Clone the repo if it doesn't exist, or navigate to it if it does
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if [ ! -d "$REPO_DIR" ]; then
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curl -d "Cloning: $CLEAN_REPO_URL" $NTFY_URL
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git clone "$FULL_REPO_URL" "$REPO_DIR" > /dev/null 2>&1
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fi
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cd "$REPO_DIR" || exit
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# Fetch the latest changes
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git fetch origin main > /dev/null 2>&1
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# Check if the local repository is behind the remote
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LOCAL=$(git rev-parse @)
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REMOTE=$(git rev-parse @{u})
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if [ "$LOCAL" != "$REMOTE" ]; then
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curl -d "Updating: $CLEAN_REPO_URL" $NTFY_URL
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git pull origin main > /dev/null 2>&1
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rsync -av --delete --exclude '.git/' ./ "$DESTINATION" > /dev/null 2>&1
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fi
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}
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# Main loop
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while true; do
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# Iterate over each environment variable matching 'REPO_[0-9]+'
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env | grep '^REPO_[0-9]\+=' | while IFS='=' read -r name value; do
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# Split the value by comma and read into separate variables
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OLD_IFS="$IFS" # Save the original IFS
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IFS=',' # Set IFS to comma for splitting
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set -- $value # Set positional parameters ($1, $2, ...)
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REPO_URL="$1" # Assign first parameter to REPO_URL
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DESTINATION="$2" # Assign second parameter to DESTINATION
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IFS="$OLD_IFS" # Restore original IFS
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process_repo "$REPO_URL" "$DESTINATION"
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done
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# Wait for 5 seconds before the next iteration
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sleep 60
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done
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``` |