pr-metadata.yml

name: pr-metadata

# Keep PR triage fields useful without requiring manual cleanup on every branch.
# This workflow only updates PR metadata; it never checks out or executes PR code.
on:
  pull_request_target:
    types: [opened, reopened, synchronize, ready_for_review]

permissions:
  contents: read
  issues: write
  pull-requests: write

jobs:
  triage:
    runs-on: ubuntu-latest
    env:
      PROJECT_TOKEN: ${{ secrets.PROJECT_TOKEN || secrets.ENGINE_TOKEN }}
      TRIAGE_PROJECT_URLS: ${{ vars.TRIAGE_PROJECT_URLS }}
    steps:
      - name: Assign author and label by changed paths
        uses: actions/github-script@v7
        with:
          script: |
            const pr = context.payload.pull_request;
            const owner = context.repo.owner;
            const repo = context.repo.repo;
            const issue_number = pr.number;

            const assignees = ['TechEngineBot'];
            if (!pr.user?.type?.endsWith('Bot')) {
              assignees.push(pr.user.login);
            }

            const FILE_SCAN_LIMIT = 500;
            const files = [];
            const fileIterator = github.paginate.iterator(github.rest.pulls.listFiles, {
              owner,
              repo,
              pull_number: issue_number,
              per_page: 100,
            });
            for await (const { data } of fileIterator) {
              files.push(...data);
              if (files.length >= FILE_SCAN_LIMIT) break;
            }
            const filesWereCapped = (pr.changed_files || files.length) > files.length;

            const labels = new Set();
            const title = pr.title.toLowerCase();
            for (const file of files) {
              const path = file.filename;
              const isDataDump = path.startsWith('site/public/v1/') || path === 'site/public/openapi.json';
              if (path.startsWith('site/') && !isDataDump) {
                labels.add('site');
              }
              if (path.startsWith('data/') || isDataDump) {
                labels.add('data');
              }
              if (path.startsWith('app/')) labels.add('app');
              if (path.startsWith('.github/workflows/')) labels.add('ci');
              if (path.startsWith('docs/') || path === 'README.md' || path.endsWith('.md')) labels.add('documentation');
            }
            if (title.startsWith('feat') || labels.has('site') || labels.has('data') || labels.has('app')) {
              labels.add('enhancement');
            }
            if (title.startsWith('fix')) {
              labels.add('bug');
            }

            await github.rest.issues.addAssignees({
              owner,
              repo,
              issue_number,
              assignees: [...new Set(assignees)],
            });

            if (labels.size) {
              await github.rest.issues.addLabels({
                owner,
                repo,
                issue_number,
                labels: [...labels],
              });
            }

            const milestoneByLabel = new Map([
              ['site', 'Homepage and site improvements'],
              ['data', 'Massive dataset rebuild (1989-2026)'],
            ]);
            for (const [label, title] of milestoneByLabel) {
              if (!labels.has(label)) continue;
              const milestones = await github.paginate(github.rest.issues.listMilestones, {
                owner,
                repo,
                state: 'open',
                per_page: 100,
              });
              const milestone = milestones.find((item) => item.title === title);
              if (milestone) {
                await github.rest.issues.update({
                  owner,
                  repo,
                  issue_number,
                  milestone: milestone.number,
                });
              }
              break;
            }

            const changedLines = (pr.additions || 0) + (pr.deletions || 0);
            let priority = 'Medium';
            if (labels.has('data') && (files.length >= 25 || changedLines >= 1000)) {
              priority = 'High';
            } else if (labels.has('data') || labels.has('app') || title.startsWith('fix')) {
              priority = 'High';
            } else if (labels.size === 1 && labels.has('documentation')) {
              priority = 'Low';
            } else if (changedLines <= 25 && !labels.has('ci')) {
              priority = 'Low';
            }
            core.exportVariable('TRIAGE_PRIORITY', priority);

            const trackingIssuesByLabel = new Map([
              ['data', 1],
              ['site', 19],
            ]);
            const trackingIssues = [];
            for (const [label, issueNumber] of trackingIssuesByLabel) {
              if (labels.has(label)) trackingIssues.push(issueNumber);
            }
            if (trackingIssues.length) {
              let body = pr.body || '';
              let updatedBody = body;
              for (const issueNumber of trackingIssues) {
                const closingLine = `Closes #${issueNumber}`;
                const closingPattern = new RegExp(`\\b(?:close[sd]?|fix(?:e[sd])?|resolve[sd]?)\\s+#${issueNumber}\\b`, 'i');
                const refsPattern = new RegExp(`\\bRefs\\s+#${issueNumber}\\b`, 'i');
                if (closingPattern.test(updatedBody)) continue;
                if (refsPattern.test(updatedBody)) {
                  updatedBody = updatedBody.replace(refsPattern, closingLine);
                } else {
                  updatedBody = `${updatedBody.trimEnd()}\n\n${closingLine}`;
                }
              }
              if (updatedBody !== body) {
                await github.rest.pulls.update({
                  owner,
                  repo,
                  pull_number: issue_number,
                  body: updatedBody,
                });
              }

              const changedByTopLevel = new Map();
              const changedData = new Map([
                ['brand', { added: 0, modified: 0, deleted: 0 }],
                ['soc', { added: 0, modified: 0, deleted: 0 }],
                ['smartphone', { added: 0, modified: 0, deleted: 0 }],
                ['tablet', { added: 0, modified: 0, deleted: 0 }],
                ['watch', { added: 0, modified: 0, deleted: 0 }],
                ['pda', { added: 0, modified: 0, deleted: 0 }],
                ['gpu', { added: 0, modified: 0, deleted: 0 }],
                ['cpu', { added: 0, modified: 0, deleted: 0 }],
              ]);
              for (const file of files) {
                const top = file.filename.split('/')[0] || '(root)';
                changedByTopLevel.set(top, (changedByTopLevel.get(top) || 0) + 1);
                const parts = file.filename.split('/');
                if (parts[0] === 'data' && changedData.has(parts[1])) {
                  const bucket = changedData.get(parts[1]);
                  const status = file.status === 'removed'
                    ? 'deleted'
                    : file.status === 'added'
                      ? 'added'
                      : 'modified';
                  bucket[status] += 1;
                }
              }

              const dataRows = [...changedData.entries()]
                .filter(([, counts]) => counts.added || counts.modified || counts.deleted)
                .map(([category, counts]) => `| ${category} | ${counts.added} | ${counts.modified} | ${counts.deleted} |`)
                .join('\n') || '| none | 0 | 0 | 0 |';
              const topRows = [...changedByTopLevel.entries()]
                .sort((a, b) => b[1] - a[1])
                .slice(0, 8)
                .map(([area, count]) => `| ${area} | ${count} |`)
                .join('\n');
              const labelText = [...labels].sort().map((label) => `\`${label}\``).join(', ') || 'none';
              const trackerComment = [
                `<!-- techapi-tracking-issue-pr-${issue_number} -->`,
                `## Linked PR update: ${pr.title} #${issue_number}`,
                '',
                `- PR: ${pr.html_url}`,
                `- Branch: \`${pr.head.ref}\``,
                `- Author: @${pr.user.login}`,
                `- Labels: ${labelText}`,
                `- Priority: ${priority}`,
                `- Files changed: ${pr.changed_files || files.length}${filesWereCapped ? ` (sampled ${files.length} for metadata)` : ''}`,
                `- Lines changed: +${pr.additions || files.reduce((sum, file) => sum + file.additions, 0)} / -${pr.deletions || files.reduce((sum, file) => sum + file.deletions, 0)}`,
                '',
                '### Changed Data',
                '',
                '| Category | Added | Modified | Deleted |',
                '| --- | ---: | ---: | ---: |',
                dataRows,
                '',
                '### Changed Areas',
                '',
                '| Area | Files |',
                '| --- | ---: |',
                topRows || '| none | 0 |',
                '',
                '### Notes',
                '',
                '- This is an automatic tracking comment for the long-running issue.',
                ...(filesWereCapped ? ['- Large PR detected: changed-area tables are based on the first sampled files, while total file/line counts come from GitHub PR metadata.'] : []),
                '- PR validation details are posted on the PR by TechEngineBot.',
                '- The tracker issue remains open even when the PR uses `Closes #...` for GitHub Development linking.',
              ].join('\n');

              for (const issueNumber of trackingIssues) {
                const comments = await github.paginate(github.rest.issues.listComments, {
                  owner,
                  repo,
                  issue_number: issueNumber,
                  per_page: 100,
                });
                const marker = `<!-- techapi-tracking-issue-pr-${issue_number} -->`;
                const existing = comments.find((comment) => comment.body?.includes(marker));
                if (existing) {
                  await github.rest.issues.updateComment({
                    owner,
                    repo,
                    comment_id: existing.id,
                    body: trackerComment,
                  });
                } else {
                  await github.rest.issues.createComment({
                    owner,
                    repo,
                    issue_number: issueNumber,
                    body: trackerComment,
                  });
                }
              }
            }

      - name: Add PR to configured projects
        if: env.TRIAGE_PROJECT_URLS != '' && env.PROJECT_TOKEN != ''
        continue-on-error: true
        env:
          GH_TOKEN: ${{ env.PROJECT_TOKEN }}
          PR_URL: ${{ github.event.pull_request.html_url }}
        shell: bash
        run: |
          set -uo pipefail
          IFS=',' read -ra urls <<< "${TRIAGE_PROJECT_URLS}"
          today="$(date -u +%F)"
          for url in "${urls[@]}"; do
            url="$(echo "$url" | xargs)"
            [ -z "$url" ] && continue
            if [[ "$url" =~ github.com/orgs/([^/]+)/projects/([0-9]+) ]]; then
              owner="${BASH_REMATCH[1]}"
              project_number="${BASH_REMATCH[2]}"
            elif [[ "$url" =~ github.com/users/([^/]+)/projects/([0-9]+) ]]; then
              owner="${BASH_REMATCH[1]}"
              project_number="${BASH_REMATCH[2]}"
            else
              echo "::warning::Unsupported project URL: $url"
              continue
            fi

            project_json="$(gh project view "$project_number" --owner "$owner" --format json)" || {
              echo "::warning::Could not read project $owner/$project_number. Skipping project metadata."
              continue
            }
            project_id="$(jq -r '.id' <<< "$project_json")"
            item_id="$(gh project item-add "$project_number" --owner "$owner" --url "$PR_URL" --format json --jq '.id')" || {
              echo "::warning::Could not add PR to project $owner/$project_number. Skipping project metadata."
              continue
            }
            status_field_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq '.fields[] | select(.name == "Status") | .id' || true)"
            status_option_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq '.fields[] | select(.name == "Status") | .options[] | select(.name == "In Progress") | .id' || true)"
            if [ -z "$status_option_id" ]; then
              status_option_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq '.fields[] | select(.name == "Status") | .options[] | select(.name == "Todo") | .id' || true)"
            fi
            start_field_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq '.fields[] | select(.name == "Start date") | .id' || true)"
            target_field_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq '.fields[] | select(.name == "Target date") | .id' || true)"
            priority_field_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq '.fields[] | select(.name == "Priority") | .id' || true)"
            priority_option_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq ".fields[] | select(.name == \"Priority\") | .options[] | select(.name == \"${TRIAGE_PRIORITY:-Medium}\") | .id" || true)"
            if [ -z "$priority_option_id" ]; then
              priority_option_id="$(gh project field-list "$project_number" --owner "$owner" --format json --jq '.fields[] | select(.name == "Priority") | .options[] | select(.name == "Medium") | .id' || true)"
            fi

            if [ -n "$item_id" ] && [ -n "$status_field_id" ] && [ -n "$status_option_id" ]; then
              gh project item-edit --id "$item_id" --project-id "$project_id" --field-id "$status_field_id" --single-select-option-id "$status_option_id" || echo "::warning::Could not set project status."
            fi
            if [ -n "$item_id" ] && [ -n "$start_field_id" ]; then
              gh project item-edit --id "$item_id" --project-id "$project_id" --field-id "$start_field_id" --date "$today" || echo "::warning::Could not set project start date."
            fi
            if [ -n "$item_id" ] && [ -n "$target_field_id" ]; then
              gh project item-edit --id "$item_id" --project-id "$project_id" --field-id "$target_field_id" --date "$today" || echo "::warning::Could not set project target date."
            fi
            if [ -n "$item_id" ] && [ -n "$priority_field_id" ] && [ -n "$priority_option_id" ]; then
              gh project item-edit --id "$item_id" --project-id "$project_id" --field-id "$priority_field_id" --single-select-option-id "$priority_option_id" || echo "::warning::Could not set project priority."
            fi
          done