initial commit

.github/workflows/docker.yml

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+name: docker
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@master
+    - name: docker publish
+      uses: elgohr/Publish-Docker-Github-Action@master
+      with:
+        name: buckaroobanzay/git_autoupdate
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+        tag_names: true
+        cache: true

Dockerfile

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+FROM alpine:3.12.1
+
+# prepare minute job dir for crond
+RUN mkdir /etc/periodic/minute
+RUN echo "* * * * * run-parts /etc/periodic/minute" >> /etc/crontabs/root
+
+# add deps
+RUN apk add git
+
+# add local files
+COPY ./entrypoint.sh /entrypoint.sh
+COPY ./jobs/update.sh /etc/periodic/minute/update
+
+CMD ["/entrypoint.sh"]

entrypoint.sh

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+#!/bin/sh
+
+
+crond -f &
+crond_pid=$!
+
+while `true`
+do
+  sleep 3600
+done
+
+# kill $crond_pid

jobs/update.sh

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+#!/bin/sh
+test -d "$GIT_DIR" || exit
+cd $GIT_DIR
+
+test -z "$GIT_BRANCH" && GIT_BRANCH=master
+
+git remote update
+git diff --exit-code HEAD origin/$GIT_BRANCH && exit
+
+echo "updating repository"
+
+# pull branch
+git pull origin $GIT_BRANCH
+
+echo "Update complete!"

readme.md

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+
+git repository auto updater
+------------
+
+# Overview
+
+Auto-updates a git repository
+
+# Environment variables
+
+* **GIT_DIR** path to the git repo
+* **GIT_BRANCH** branch to use (optional)
+
+# Usage
+
+```bash
+docker run \
+ -v /my/git/repo:/git \
+ -e GIT_DIR=/git \
+ -e GIT_BRANCH=master \
+ buckaroobanzay/git_autoupdate
+```
+
+# License
+
+MIT