name: Refresh Lockfile

on:
  push:
    branches:
      - master
  schedule:
    # Retry refreshes held by the release-age gate once their versions are old enough.
    - cron: "23 6 * * *"
  workflow_dispatch:

concurrency:
  group: refresh-lockfile-master
  cancel-in-progress: false

jobs:
  refresh:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    # Holds the lockfile bot key. Restrict this environment to master so no
    # other branch or workflow can mint a token that bypasses master rules.
    environment: lockfile-refresh
    permissions:
      actions: read
      contents: write
      pull-requests: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v7

      - name: Setup pnpm
        uses: pnpm/action-setup@v6
        with:
          version: 9.15.4
          run_install: false

      - name: Setup Node.js
        uses: actions/setup-node@v7
        with:
          node-version: 24
          # Resolution-only installs do not populate the package store. Do not
          # claim the shared cache key with an empty archive before full installs.
          package-manager-cache: false

      # Start from the lockfile the previous run held, so resolution keeps those
      # versions while their manifests are unchanged and they can age past the
      # gate. Read it from that run's artifact, not the PR branch: anyone with
      # write access can push to chore/refresh-lockfile.
      - name: Reuse versions from a held refresh
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          run_id="$(
            gh run list --workflow refresh-lockfile.yml --branch master --status success --limit 20 \
              --json databaseId,event \
              --jq '[.[] | select(.event == "push" or .event == "schedule" or .event == "workflow_dispatch")][0].databaseId // empty'
          )"
          held="$RUNNER_TEMP/held-lock"
          if [ -z "$run_id" ] || ! gh run download "$run_id" --name held-pnpm-lock --dir "$held" 2>/dev/null; then
            echo "The previous refresh held nothing. Resolving from master."
            exit 0
          fi
          # Reuse the held lock only while master still has the lock it was
          # resolved from. A lock change on master, such as a maintainer's
          # correction, supersedes it.
          if [ "$(sha256sum < pnpm-lock.yaml)" != "$(cat "$held/source-lock.sha256")" ]; then
            echo "The lockfile on master changed after run $run_id held its refresh. Resolving from master."
            exit 0
          fi
          cp "$held/pnpm-lock.yaml" pnpm-lock.yaml
          echo "Resolving from the lockfile held by run $run_id."

      - name: Refresh pnpm lockfile
        run: pnpm install --resolution-only --ignore-scripts --no-frozen-lockfile

      - name: Refresh reviewed eval report dependency proof
        run: node tests/runner-e2e/prepare-report-lock.mjs --refresh

      - name: Fail on unexpected file changes
        run: |
          changed="$(git status --porcelain)"
          if [ -z "$changed" ]; then
            echo "Lockfile is already up to date."
            exit 0
          fi
          unexpected="$(printf '%s\n' "$changed" | awk '$2 != "pnpm-lock.yaml" && $2 != "tests/runner-e2e/report-lock.json" && $2 != "tests/runner-e2e/report-lock.patch" { print }')"
          if [ -n "$unexpected" ]; then
            echo "Unexpected files changed during lockfile refresh:"
            echo "$changed"
            exit 1
          fi

      - name: Create or update pull request
        id: upsert-pr
        env:
          GH_TOKEN: ${{ github.token }}
          REPO_OWNER: ${{ github.repository_owner }}
        run: |
          if git diff --quiet -- pnpm-lock.yaml; then
            echo "Lockfile unchanged, nothing to do."
            echo "pr_url=" >> "$GITHUB_OUTPUT"
            echo "head_sha=" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          BRANCH="chore/refresh-lockfile"
          git config user.name "lockfile-bot"
          git config user.email "lockfile-bot@users.noreply.github.com"

          git checkout -B "$BRANCH"
          git add pnpm-lock.yaml tests/runner-e2e/report-lock.json tests/runner-e2e/report-lock.patch
          git commit -m "chore(lockfile): refresh pnpm-lock.yaml"
          git push --force origin "$BRANCH"

          # Only reuse an open PR from this repository owner, not a fork with the same branch name.
          pr_url="$(
            gh pr list --state open --head "$BRANCH" --json url,headRepositoryOwner \
              --jq ".[] | select(.headRepositoryOwner.login == \"$REPO_OWNER\") | .url" |
            head -n 1
          )"
          if [ -z "$pr_url" ]; then
            pr_body_file="$RUNNER_TEMP/lockfile-pr-body.md"
            cat > "$pr_body_file" <<'PR_BODY'
          ## Thinking Path

          > - Paperclip uses a dependency lock for reproducible builds.
          > - Dependency changes on master need matching lock entries.
          > - Paid eval reports also pin a reviewed offline correction.
          > - Reports must install before paid model work starts.
          > - This automated PR keeps the lock and report proof together.

          ## Linked Issues or Issue Description

          **What happened?**

          Dependency manifests on master changed after the last committed lock refresh.

          **Expected behavior**

          Frozen installs must match those manifests. Eval reports must retain matching offline lock proof.

          **Steps to reproduce**

          Run a frozen install before and after this lock refresh.

          ## What Changed

          - Refresh the dependency lock from the manifests on master.
          - Include the matching offline report correction and hashes.

          ## Verification

          - Pinned pnpm resolution completed with lifecycle scripts disabled.
          - The report proof refresh accepted the reviewed committed baseline.
          - The workflow rejected changes outside the lock and report proof files.

          ## Risks

          The lockfile bot merges this PR without CI or review when every added package version is at least 3 days old on npm. Otherwise the PR waits for a maintainer, and the daily refresh tries again. The bot merges only the exact commit this workflow generated from manifests already reviewed on master. Unknown report lock baselines remain blocked. This update changes no permissions or paid enable gates.

          ## Model Used

          None — generated by pnpm and the deterministic report-lock updater.

          ## Checklist

          - [x] Thinking path and problem description included
          - [x] Generated lock and matching report proof included
          - [x] Release-age gate decides between bot merge and maintainer review
          PR_BODY
            pr_url="$(gh pr create \
              --head "$BRANCH" \
              --title "chore(lockfile): refresh pnpm-lock.yaml" \
              --body-file "$pr_body_file")"
            echo "Created new PR: $pr_url"
          else
            echo "PR already exists: $pr_url"
          fi
          echo "pr_url=$pr_url" >> "$GITHUB_OUTPUT"
          echo "head_sha=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"

      # Resolution picks the newest matching version for any added or widened
      # dependency. Merge without review only when every added version has been
      # on npm long enough for a hijacked release to be caught and pulled.
      - name: Check release age of added package versions
        id: release-age
        if: steps.upsert-pr.outputs.pr_url != ''
        run: |
          git show "$GITHUB_SHA:pnpm-lock.yaml" > "$RUNNER_TEMP/base-pnpm-lock.yaml"
          node .github/scripts/check-lockfile-release-age.mjs \
            --base "$RUNNER_TEMP/base-pnpm-lock.yaml" \
            --head pnpm-lock.yaml \
            --min-age-days 3 \
            --report "$RUNNER_TEMP/release-age-report.md"
          cat "$RUNNER_TEMP/release-age-report.md" >> "$GITHUB_STEP_SUMMARY"

      - name: Hold lockfile PR for review
        if: steps.release-age.outputs.eligible == 'false'
        env:
          GH_TOKEN: ${{ github.token }}
          PR_URL: ${{ steps.upsert-pr.outputs.pr_url }}
        run: |
          # Keep one report comment per PR instead of adding one on every run.
          pr_number="${PR_URL##*/}"
          comment_id="$(
            gh api --paginate "repos/$GITHUB_REPOSITORY/issues/$pr_number/comments" \
              --jq '.[] | select(.user.login == "github-actions[bot]" and (.body | startswith("<!-- lockfile-release-age -->"))) | .id' |
            head -n 1
          )"
          if [ -n "$comment_id" ]; then
            gh api --method PATCH "repos/$GITHUB_REPOSITORY/issues/comments/$comment_id" \
              -F "body=@$RUNNER_TEMP/release-age-report.md" > /dev/null
          else
            gh pr comment "$PR_URL" --body-file "$RUNNER_TEMP/release-age-report.md"
          fi
          echo "::notice title=Lockfile PR held::Added package versions are too new to merge without review. See $PR_URL"

      - name: Stage held lockfile
        if: steps.release-age.outputs.eligible == 'false'
        run: |
          mkdir -p "$RUNNER_TEMP/held-upload"
          cp pnpm-lock.yaml "$RUNNER_TEMP/held-upload/pnpm-lock.yaml"
          sha256sum < "$RUNNER_TEMP/base-pnpm-lock.yaml" > "$RUNNER_TEMP/held-upload/source-lock.sha256"

      - name: Save held lockfile for the next refresh
        if: steps.release-age.outputs.eligible == 'false'
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7
        with:
          name: held-pnpm-lock
          path: ${{ runner.temp }}/held-upload/
          if-no-files-found: error
          retention-days: 7

      # Mint the bypass token only after resolution has finished, so no earlier
      # step can read it. The lockfile bot is a master ruleset bypass actor in
      # pull_request mode: it can merge PRs past checks and review, but cannot
      # push to master directly. See doc/RELEASE-AUTOMATION-SETUP.md.
      - name: Create lockfile bot token
        id: bot-token
        if: steps.release-age.outputs.eligible == 'true'
        uses: actions/create-github-app-token@64ab729a6294000f5aa4a4bc0b73d1f32bc45510 # v3.3.0
        with:
          client-id: ${{ vars.LOCKFILE_BOT_CLIENT_ID }}
          private-key: ${{ secrets.LOCKFILE_BOT_PRIVATE_KEY }}
          permission-contents: write
          permission-pull-requests: write

      - name: Merge lockfile PR
        if: steps.release-age.outputs.eligible == 'true'
        env:
          GH_TOKEN: ${{ steps.bot-token.outputs.token }}
          PR_URL: ${{ steps.upsert-pr.outputs.pr_url }}
          HEAD_SHA: ${{ steps.upsert-pr.outputs.head_sha }}
        run: |
          # Merge only the commit this job pushed. Anything else pushed to the
          # branch since then makes GitHub refuse the merge.
          gh pr merge "$PR_URL" --squash --admin --delete-branch --match-head-commit "$HEAD_SHA"