auto-close-stale-issues.yaml

name: Auto-close stale issues by status label

on:
  schedule:
    # 毎日 UTC 0:00(JST 9:00)に実行
    - cron: "0 0 * * *"
  workflow_dispatch:  # 手動実行も可能に

permissions:
  issues: write

jobs:
  close-stale:
    runs-on: ubuntu-latest
    steps:
      - name: Close stale issues based on status labels
        uses: actions/github-script@v7
        with:
          script: |
            // ============================================================
            // 設定:ラベルごとのクローズ条件
            // ============================================================
            const rules = [
              {
                labels: ["Status: duplicate"],
                days: 14,
                comment: null,  // コメントなしでクローズ
              },
              {
                labels: ["Status: needs info from reporter", "Status: help wanted"],
                days: 60,
                comment: "This issue has been closed due to no progress for 60 days. If the issue persists, please post again and we will reopen it.",
              },
              {
                labels: ["Status: fixed", "Status: resolved"],
                days: 60,
                comment: "This issue has been resolved by the maintainers, so we will close it.",
              },
            ];

            const { owner, repo } = context.repo;
            const now = Date.now();

            // 全ての対象ラベルを集める
            const allTargetLabels = [...new Set(rules.flatMap(r => r.labels))];

            for (const targetLabel of allTargetLabels) {
              // 該当ラベルが付いた open issue を取得(PR は除外)
              const issues = await github.paginate(
                github.rest.issues.listForRepo,
                {
                  owner,
                  repo,
                  state: "open",
                  labels: targetLabel,
                  per_page: 100,
                }
              );

              for (const issue of issues) {
                // Pull Request は除外
                if (issue.pull_request) continue;

                // このラベルに対応するルールを取得
                const rule = rules.find(r => r.labels.includes(targetLabel));
                if (!rule) continue;

                // ラベルが「最後に」付与された時刻を取得
                // (途中で外して再付与された場合に備え、最新の labeled イベントを使う)
                const events = await github.paginate(
                  github.rest.issues.listEventsForTimeline,
                  {
                    owner,
                    repo,
                    issue_number: issue.number,
                    per_page: 100,
                  }
                );

                const lastLabeledAt = events
                  .filter(e => e.event === "labeled" && e.label?.name === targetLabel)
                  .map(e => new Date(e.created_at).getTime())
                  .sort((a, b) => b - a)[0];

                if (!lastLabeledAt) continue;

                // ラベル付与後の最終活動時刻を取得
                // (issue 自体の updated_at にはラベル変更も含まれるため、
                //  ここでは「コメント追加」をユーザー活動と見なす)
                const comments = await github.paginate(
                  github.rest.issues.listComments,
                  {
                    owner,
                    repo,
                    issue_number: issue.number,
                    since: new Date(lastLabeledAt).toISOString(),
                    per_page: 100,
                  }
                );

                const lastCommentAt = comments.length
                  ? Math.max(...comments.map(c => new Date(c.created_at).getTime()))
                  : 0;

                // ラベル付与 or それ以降のコメントの、より新しい方を基準にする
                const referenceTime = Math.max(lastLabeledAt, lastCommentAt);
                const daysInactive = (now - referenceTime) / (1000 * 60 * 60 * 24);

                if (daysInactive >= rule.days) {
                  console.log(
                    `Closing #${issue.number} ` +
                    `(label="${targetLabel}", inactive=${daysInactive.toFixed(1)}d)`
                  );

                  // コメント投稿(設定されている場合)
                  if (rule.comment) {
                    await github.rest.issues.createComment({
                      owner,
                      repo,
                      issue_number: issue.number,
                      body: rule.comment,
                    });
                  }

                  // クローズ実行
                  await github.rest.issues.update({
                    owner,
                    repo,
                    issue_number: issue.number,
                    state: "closed",
                    state_reason: "not_planned",  // または "completed"
                  });
                } else {
                  console.log(
                    `Skipping #${issue.number} ` +
                    `(label="${targetLabel}", inactive=${daysInactive.toFixed(1)}d / ${rule.days}d)`
                  );
                }
              }
            }