opencode/.github/workflows/upstream-sync.yml

name: upstream-sync

on:
  schedule:
    # Check weekly on Mondays at 9am UTC
    - cron: '0 9 * * 1'
  workflow_dispatch:
    inputs:
      create_pr:
        description: 'Create PR if behind upstream'
        type: boolean
        default: false

jobs:
  check-upstream:
    runs-on: ubuntu-latest
    outputs:
      behind: ${{ steps.check.outputs.behind }}
      ahead: ${{ steps.check.outputs.ahead }}
      merge_base: ${{ steps.check.outputs.merge_base }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Add upstream remote
        run: |
          git remote add upstream https://github.com/sst/opencode.git || true
          git fetch upstream --tags

      - name: Check divergence
        id: check
        run: |
          MERGE_BASE=$(git merge-base HEAD upstream/dev)
          read AHEAD BEHIND <<< "$(git rev-list --left-right --count HEAD...upstream/dev)"

          echo "merge_base=${MERGE_BASE:0:10}" >> $GITHUB_OUTPUT
          echo "ahead=$AHEAD" >> $GITHUB_OUTPUT
          echo "behind=$BEHIND" >> $GITHUB_OUTPUT

          echo "## Upstream Sync Status" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "| Metric | Value |" >> $GITHUB_STEP_SUMMARY
          echo "|--------|-------|" >> $GITHUB_STEP_SUMMARY
          echo "| Merge base | \`${MERGE_BASE:0:10}\` |" >> $GITHUB_STEP_SUMMARY
          echo "| Commits ahead | $AHEAD |" >> $GITHUB_STEP_SUMMARY
          echo "| Commits behind | $BEHIND |" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY

          if [ "$BEHIND" -gt 0 ]; then
            echo "### Upstream commits to merge" >> $GITHUB_STEP_SUMMARY
            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
            git log --oneline "$MERGE_BASE..upstream/dev" | head -20 >> $GITHUB_STEP_SUMMARY
            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
          fi

      - name: Check for conflicts
        if: steps.check.outputs.behind != '0'
        run: |
          echo "### Potential Conflicts" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY

          MERGE_BASE=$(git merge-base HEAD upstream/dev)
          UPSTREAM_CHANGED=$(git diff --name-only "$MERGE_BASE..upstream/dev")
          OUR_CHANGED=$(git diff --name-only "$MERGE_BASE..HEAD")

          CONFLICTS=""
          for file in $UPSTREAM_CHANGED; do
            if echo "$OUR_CHANGED" | grep -q "^$file$"; then
              CONFLICTS="$CONFLICTS\n- \`$file\`"
            fi
          done

          if [ -n "$CONFLICTS" ]; then
            echo "Files modified in both branches:" >> $GITHUB_STEP_SUMMARY
            echo -e "$CONFLICTS" >> $GITHUB_STEP_SUMMARY
          else
            echo "No obvious conflicts detected." >> $GITHUB_STEP_SUMMARY
          fi

  notify:
    needs: check-upstream
    runs-on: ubuntu-latest
    if: needs.check-upstream.outputs.behind != '0'
    steps:
      - name: Summary
        run: |
          echo "Agent-core is ${{ needs.check-upstream.outputs.behind }} commits behind upstream."
          echo "Run ./scripts/sync-upstream.sh --preview to see details."

  create-sync-pr:
    needs: check-upstream
    runs-on: ubuntu-latest
    if: github.event.inputs.create_pr == 'true' && needs.check-upstream.outputs.behind != '0'
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Git
        run: |
          git config user.email "bot@agent-core.dev"
          git config user.name "agent-core-bot"

      - name: Add upstream and create sync branch
        run: |
          git remote add upstream https://github.com/sst/opencode.git || true
          git fetch upstream

          BRANCH="sync/upstream-$(date +%Y%m%d)"
          git checkout -b "$BRANCH"

          # Attempt merge
          if git merge upstream/dev --no-edit -m "Sync upstream OpenCode $(git log -1 --format=%h upstream/dev)"; then
            git push origin "$BRANCH"
            echo "SYNC_BRANCH=$BRANCH" >> $GITHUB_ENV
            echo "MERGE_SUCCESS=true" >> $GITHUB_ENV
          else
            echo "MERGE_SUCCESS=false" >> $GITHUB_ENV
            git merge --abort
          fi

      - name: Create PR
        if: env.MERGE_SUCCESS == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh pr create \
            --title "Sync upstream OpenCode (${{ needs.check-upstream.outputs.behind }} commits)" \
            --body "## Upstream Sync

          Merging ${{ needs.check-upstream.outputs.behind }} commits from upstream OpenCode.

          **Merge base:** \`${{ needs.check-upstream.outputs.merge_base }}\`

          ### Checklist
          - [ ] Review changes for conflicts with our customizations
          - [ ] Run \`bun turbo typecheck\`
          - [ ] Run \`bun turbo test\`
          - [ ] Test with all personas (zee, stanley, johny)

          ---
          *Auto-generated by upstream-sync workflow*" \
            --base dev \
            --head "${{ env.SYNC_BRANCH }}"