feat: initial commit

Dockerfile

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+FROM alpine
+
+LABEL "com.github.actions.name"="Github Sync"
+LABEL "com.github.actions.description"="⤵️ Sync current repository with remote"
+LABEL "com.github.actions.icon"="git-branch"
+LABEL "com.github.actions.color"="black"
+
+LABEL "repository"="http://github.com/wei/github-sync"
+LABEL "homepage"="http://github.com/wei/github-sync"
+LABEL "maintainer"="Wei He <[email protected]>"
+
+RUN apk add --no-cache git openssh-client && \
+  echo "StrictHostKeyChecking no" >> /etc/ssh/ssh_config
+
+ADD *.sh /
+
+ENTRYPOINT ["/entrypoint.sh"]

README.md

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+# Github Sync
+
+A GitHub Action for syncing the current repository using **force push**. 
+
+
+## Features
+ * Sync branches between two Github repositories
+ * Sync branches from a remote repository
+ * Github action can be triggered on a timer or on push
+ * To push to a remote repository, please checkout [wei/git-sync](https://github.com/wei/git-sync)
+
+
+## Usage
+
+### Github Actions
+```
+action "repo-sync" {
+  uses = "wei/github-sync@master"
+  args = "$SOURCE_REPO $SOURCE_BRANCH:$DESTINATION_BRANCH"
+  secrets = ["GITHUB_TOKEN"]
+  env = {
+    SOURCE_REPO = ""
+    SOURCE_BRANCH = ""
+    DESTINATION_BRANCH = ""
+  }
+}
+```
+`GITHUB_TOKEN` must be checked under secrets. 
+
+If `SOURCE_REPO` is private or with another provider, either (1) use an authenticated HTTPS repo clone url like `https://username:[email protected]/username/repository.git` or (2) set a `SSH_PRIVATE_KEY` secret and use the SSH clone url
+
+
+## Known Issue
+The job may fail if upstream has a `.workflow` file present. Consider using [git-sync](https://github.com/wei/git-sync) instead.
+
+
+## Advanced Usage: Sync all branches
+1. Make a backup
+2. Create a new branch in your repo (destination repo), it should not share the name with any branch in source repo
+3. Make the new branch the default branch under repo settings
+4. Use `*:*` in place of `$SOURCE_BRANCH:$DESTINATION_BRANCH`
+
+This will force sync ALL branches to match source repo. Branches that are created only in the destination repo will not be affected but all the other branches will be *hard reset* to match source repo. ⚠️ This does mean if upstream ever creates a branch that shares the name, your changes will be gone.
+
+
+## Author
+[Wei He](https://github.com/wei) _[email protected]_
+
+
+## License
+[MIT](https://wei.mit-license.org)

entrypoint.sh

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+#!/bin/sh
+
+set -e
+
+if [[ -n "$SSH_PRIVATE_KEY" ]]
+then
+  mkdir -p /root/.ssh
+  echo "$SSH_PRIVATE_KEY" > /root/.ssh/id_rsa
+  chmod 600 /root/.ssh/id_rsa
+fi
+
+mkdir -p ~/.ssh
+cp /root/.ssh/* ~/.ssh/ 2> /dev/null || true 
+
+sh -c "/github-sync.sh $*"

github-sync.sh

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+#!/bin/sh
+
+set -e
+
+UPSTREAM_REPO=$1
+BRANCH_MAPPING=$2
+
+if ! echo $UPSTREAM_REPO | grep '.git'
+then
+  UPSTREAM_REPO="https://github.com/${UPSTREAM_REPO}.git"
+fi
+
+echo "UPSTREAM_REPO=$UPSTREAM_REPO"
+echo "BRANCHES=$BRANCH_MAPPING"
+
+git remote add upstream "$UPSTREAM_REPO"
+git fetch upstream
+git remote -v
+git push origin "refs/remotes/upstream/${BRANCH_MAPPING%%:*}:refs/heads/${BRANCH_MAPPING#*:}" -f