Add GHA workflow to sync fork with upstream changes

.github/workflows/sync-fork.yml

@@ -0,0 +1,48 @@
+name: Sync fork
+
+on:
+ schedule:
+ - cron: "41 19 * * *"
+ workflow_dispatch:
+
+jobs:
+ sync:
+ runs-on: ubuntu-latest
+
+ permissions:
+ contents: write
+
+ timeout-minutes: 5
+
+ steps:
+ - name: Checkout current fork HEAD
+ uses: actions/[email protected]
+ with:
+ fetch-depth: 0
+ show-progress: false
+
+ - name: Set up upstream git remote
+ run: |
+ upstream="$(gh repo view "${{ github.repository }}" --json parent --jq '.parent.owner.login + "/" + .parent.name')"
+ echo "upstream=$upstream"
+ git remote add upstream "https://github.com/$upstream.git"
+ git fetch upstream "${{ github.event.repository.default_branch }}"
+ env:
+ GH_TOKEN: ${{ github.token }}
+
+ - name: Determine number of missing commits from usptream
+ id: check-missing-commits
+ run: |
+ upstream_commit_count="$(git rev-list --count "$GITHUB_REF_NAME..upstream/${{ github.event.repository.default_branch }}")"
+ echo "commit-count=$upstream_commit_count" | tee -a "$GITHUB_OUTPUT"
+
+ - name: Rebase and push
+ run: |
+ git config user.name "github-actions[bot]"
+ git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+ git rebase --committer-date-is-author-date "upstream/${{ github.event.repository.default_branch }}"
+
+ git push --force
+ if: >-
+ fromJSON(steps.check-missing-commits.outputs.commit-count) > 0