name: Update webpki-roots

# Weekly refresh of the compiled-in TLS root certificates (the webpki-roots
# crate, a snapshot of the Mozilla root store). Roots are otherwise frozen at
# whatever Cargo.lock pins, so old builds miss newly added CAs and keep
# removed (distrusted) ones. Changes go through a PR on purpose: added or
# removed roots should be reviewed, not silently baked into releases.
#
# Note: PRs created with the default GITHUB_TOKEN do not trigger other
# workflows (GitHub limitation). Close and reopen the PR, or push to its
# branch, to run CI on it.

on:
  schedule:
    - cron: "0 3 * * 1"
  workflow_dispatch:

# A manual dispatch overlapping the weekly run would race it force-pushing
# the same branch; queue instead of overlapping, and never cancel a run
# that may have already pushed.
concurrency:
  group: update-webpki-roots
  cancel-in-progress: false

jobs:
  update:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    env:
      BRANCH: auto-update-webpki-roots
    steps:
      - name: Checkout source code
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
        with:
          # The root workspace lists libs/hbb_common as a member; without the
          # submodule its manifest is missing and cargo cannot load the workspace.
          submodules: recursive

      - name: Update webpki-roots in all lockfiles
        id: update
        run: |
          set -e
          git ls-files -z '*Cargo.lock' | while IFS= read -r -d '' lock; do
            dir=$(dirname "$lock")
            for v in $(sed -n '/name = "webpki-roots"/{n;s/.*version = "\(.*\)"/\1/p;}' "$lock" | sort -u); do
              echo "updating webpki-roots@$v in $dir"
              (cd "$dir" && cargo update -p "webpki-roots@$v")
            done
          done
          if git diff --quiet -- '*Cargo.lock'; then
            echo "changed=0" >> "$GITHUB_OUTPUT"
          else
            echo "changed=1" >> "$GITHUB_OUTPUT"
            git --no-pager diff -- '*Cargo.lock'
          fi

      - name: Create pull request
        if: steps.update.outputs.changed == '1'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -e
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git checkout -B "$BRANCH"
          git add -- '*Cargo.lock'
          git commit -m "chore: update webpki-roots to latest Mozilla root store"
          git push -f origin "$BRANCH"
          if [ -z "$(gh pr list --head "$BRANCH" --state open --json number --jq '.[].number')" ]; then
            gh pr create \
              --title "chore: update webpki-roots to latest Mozilla root store" \
              --body "Automated weekly refresh of the compiled-in TLS root certificates (webpki-roots). Please review the added/removed roots. CI does not run automatically on PRs created by GITHUB_TOKEN; close and reopen this PR to trigger it."
          fi