sync-labels.yml

name: "Sync: Labels"
run-name: "Sync labels after push to main"

# Runs after any push to main to ensure labels match repository state
# This fixes label propagation issues when PRs are merged manually
on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  sync-spec-labels:
    runs-on: ubuntu-latest
    permissions:
      issues: write
      contents: read

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 2  # Need to see what changed

      - name: Install yq for YAML parsing
        run: |
          sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
          sudo chmod +x /usr/local/bin/yq

      - name: Detect new specifications merged to main
        id: detect
        env:
          BEFORE: ${{ github.event.before }}
          AFTER: ${{ github.event.after }}
        run: |
          # Get list of specifications added/modified in this push
          # Use GitHub event context for reliability (handles first push, force push, etc.)
          if [ "$BEFORE" = "0000000000000000000000000000000000000000" ]; then
            # First push or new branch: diff-tree on the after commit only
            CHANGED_SPECS=$(git diff-tree --no-commit-id --name-only -r "$AFTER" | \
              grep -oP 'plots/\K[^/]+(?=/specification\.(md|yaml))' | \
              sort -u || true)
          else
            # Normal push: diff between before and after SHAs
            CHANGED_SPECS=$(git diff --name-only "$BEFORE" "$AFTER" | \
              grep -oP 'plots/\K[^/]+(?=/specification\.(md|yaml))' | \
              sort -u || true)
          fi

          if [ -z "$CHANGED_SPECS" ]; then
            echo "::notice::No specification changes detected"
            echo "specs=" >> $GITHUB_OUTPUT
            exit 0
          fi

          echo "specs<<EOF" >> $GITHUB_OUTPUT
          echo "$CHANGED_SPECS" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Sync labels for merged specifications
        if: steps.detect.outputs.specs != ''
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "${{ steps.detect.outputs.specs }}" | while read SPEC_ID; do
            [ -z "$SPEC_ID" ] && continue

            # Extract issue number from specification.yaml
            SPEC_YAML="plots/${SPEC_ID}/specification.yaml"
            if [ ! -f "$SPEC_YAML" ]; then
              echo "::warning::No specification.yaml for ${SPEC_ID}"
              continue
            fi

            ISSUE=$(yq '.issue' "$SPEC_YAML" 2>/dev/null || echo "")
            if [ -z "$ISSUE" ] || [ "$ISSUE" == "null" ]; then
              echo "::warning::No issue number in ${SPEC_YAML}"
              continue
            fi

            echo "::notice::Syncing labels for spec ${SPEC_ID} (issue #${ISSUE})"

            # Get current labels
            CURRENT_LABELS=$(gh issue view "$ISSUE" --json labels -q '.labels[].name' 2>/dev/null || echo "")

            # If specification is in main, ensure correct labels
            if echo "$CURRENT_LABELS" | grep -q "spec-request"; then
              echo "::notice::Removing spec-request label from #${ISSUE}"
              gh issue edit "$ISSUE" --remove-label "spec-request" 2>/dev/null || true
            fi

            if ! echo "$CURRENT_LABELS" | grep -q "spec-ready"; then
              echo "::notice::Adding spec-ready label to #${ISSUE}"
              gh issue edit "$ISSUE" --add-label "spec-ready" 2>/dev/null || true
            fi
          done

  sync-impl-labels:
    runs-on: ubuntu-latest
    permissions:
      issues: write
      contents: read

    steps:
      - name: Checkout repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 2

      - name: Install yq for YAML parsing
        run: |
          sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
          sudo chmod +x /usr/local/bin/yq

      - name: Detect new implementations merged to main
        id: detect
        env:
          BEFORE: ${{ github.event.before }}
          AFTER: ${{ github.event.after }}
        run: |
          # Get list of implementations added/modified in this push
          # Use GitHub event context for reliability (handles first push, force push, etc.)
          if [ "$BEFORE" = "0000000000000000000000000000000000000000" ]; then
            # First push or new branch: diff-tree on the after commit only
            CHANGED_IMPLS=$(git diff-tree --no-commit-id --name-only -r "$AFTER" | \
              grep -P 'plots/[^/]+/implementations/[^/]+\.py$' || true)
          else
            # Normal push: diff between before and after SHAs
            CHANGED_IMPLS=$(git diff --name-only "$BEFORE" "$AFTER" | \
              grep -P 'plots/[^/]+/implementations/[^/]+\.py$' || true)
          fi

          if [ -z "$CHANGED_IMPLS" ]; then
            echo "::notice::No implementation changes detected"
            echo "impls=" >> $GITHUB_OUTPUT
            exit 0
          fi

          echo "impls<<EOF" >> $GITHUB_OUTPUT
          echo "$CHANGED_IMPLS" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Sync labels for merged implementations
        if: steps.detect.outputs.impls != ''
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "${{ steps.detect.outputs.impls }}" | while read IMPL_PATH; do
            [ -z "$IMPL_PATH" ] && continue

            # Extract spec-id and library from path: plots/{spec-id}/implementations/{library}.py
            SPEC_ID=$(echo "$IMPL_PATH" | cut -d'/' -f2)
            LIBRARY=$(echo "$IMPL_PATH" | cut -d'/' -f4 | sed 's/\.py$//')

            # Get issue number
            SPEC_YAML="plots/${SPEC_ID}/specification.yaml"
            ISSUE=$(yq '.issue' "$SPEC_YAML" 2>/dev/null || echo "")

            if [ -z "$ISSUE" ] || [ "$ISSUE" == "null" ]; then
              echo "::warning::No issue for ${SPEC_ID}/${LIBRARY}"
              continue
            fi

            echo "::notice::Syncing labels for ${SPEC_ID}/${LIBRARY} (issue #${ISSUE})"

            # Remove trigger and pending labels
            gh issue edit "$ISSUE" --remove-label "generate:${LIBRARY}" 2>/dev/null || true
            gh issue edit "$ISSUE" --remove-label "impl:${LIBRARY}:pending" 2>/dev/null || true

            # Create and add done label
            gh label create "impl:${LIBRARY}:done" --color "0e8a16" \
              --description "${LIBRARY} implementation merged" 2>/dev/null || true
            gh issue edit "$ISSUE" --add-label "impl:${LIBRARY}:done" 2>/dev/null || true

            echo "::notice::✓ Labels synced for ${SPEC_ID}/${LIBRARY}"
          done