ci: base-commit #4
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| name: mergebase | |
| on: | |
| push: | |
| jobs: | |
| get_merge_base: | |
| runs-on: ubuntu-latest | |
| env: | |
| UPSTREAM_REMOTE: torvalds | |
| UPSTREAM_URL: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git | |
| UPSTREAM_BRANCH: master | |
| FETCH_STEP: 100 | |
| FETCH_MAX: 2000 | |
| steps: | |
| - name: Checkout | |
| uses: actions/checkout@v4 | |
| with: | |
| fetch-depth: 200 | |
| - name: Add upstream remote (torvalds) | |
| run: | | |
| git remote add $UPSTREAM_REMOTE $UPSTREAM_URL 2>/dev/null || true | |
| - name: Find upstream merge-base (torvalds/master) | |
| run: | | |
| set -e | |
| DEPTH=$FETCH_STEP | |
| # get Upstream initial flat | |
| git fetch $UPSTREAM_REMOTE $UPSTREAM_BRANCH --depth=$DEPTH | |
| while true; do | |
| BASE=$(git merge-base HEAD FETCH_HEAD || true) | |
| if [ -n "$BASE" ]; then | |
| echo "Found merge-base: $BASE" | |
| echo "BASE=$BASE" >> $GITHUB_ENV | |
| break | |
| fi | |
| if [ $DEPTH -ge $FETCH_MAX ]; then | |
| echo "Fallback to full fetch..." | |
| git fetch $UPSTREAM_REMOTE $UPSTREAM_BRANCH --unshallow | |
| BASE=$(git merge-base HEAD FETCH_HEAD) | |
| echo "BASE=$BASE" >> $GITHUB_ENV | |
| break | |
| fi | |
| echo "No base yet till $DEPTH, deepening by $FETCH_STEP..." | |
| git fetch $UPSTREAM_REMOTE $UPSTREAM_BRANCH --deepen=$FETCH_STEP | |
| DEPTH=$((DEPTH + FETCH_STEP)) | |
| done |