neiam /mutant-operator

name: dependency-updates
# Security updates as a pull request: scripts/dependency-update finds the
# crates in Cargo.lock with a known vulnerability (osv-scanner, against
# OSV) that a newer version fixes, bumps them, and keeps one pull
# request — deps/security-cargo — refreshed in place, closing it once
# there's nothing left to fix. The pull request is opened by the forge's
# CI account (gg-security) with this job's own token; its CI (audit.yml
# among it) is what shows the fixes landed.
#
# Daily, before the nightly audit, and by hand from the Actions page
# (`gg ci dispatch dependency-updates`). Taken from gitgud's workflow of
# the same name. Beside docker-build-push.yml in .github/workflows, for
# the reason audit.yml gives.
on:
  schedule:
    - cron: "57 5 * * *"
  workflow_dispatch:

permissions:
  contents: write # push the deps/security-cargo branch
  pull-requests: write # open, refresh and close its pull request

jobs:
  update:
    runs-on: arc-runner-set
    steps:
      # A bare arc-runner-set container may have no git, and
      # actions/checkout without git downloads a tarball with no .git
      # for the script to commit with. Installed first, then.
      - name: Tools
        run: |
          if ! command -v git >/dev/null || ! command -v python3 >/dev/null || ! command -v curl >/dev/null; then
            sudo apt-get update
            sudo apt-get install -y git curl ca-certificates python3
          fi

      - uses: actions/checkout@v4
        with:
          # The deps/security-cargo branch too, to tell whether a refresh
          # changed anything before pushing it.
          fetch-depth: 0

      # The toolchain the Dockerfile builds the image with (rust:1.83): a
      # lockfile is only as good as the resolver that wrote it, and a bump
      # that needs a newer compiler than the image's should fail here,
      # not there. Installed directly, since this runner sets ImageOS to
      # "selfhosted" over anything a workflow says.
      - name: Rust
        run: |
          curl -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal --default-toolchain 1.83
          echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

      # Pinned and checked, as in audit.yml; bump both together.
      - name: Fetch osv-scanner
        env:
          OSV_VERSION: v2.6.0
          OSV_SHA256: ca69b3d3cd08f889a49dc0a383122f71cc528b83803671df5fd874d97485b108
        run: |
          curl -sSfL -o /tmp/osv-scanner \
            "https://github.com/google/osv-scanner/releases/download/${OSV_VERSION}/osv-scanner_linux_amd64"
          echo "${OSV_SHA256}  /tmp/osv-scanner" | sha256sum -c -
          chmod +x /tmp/osv-scanner

      # The script sets its own git identity (gg-security) before it
      # commits: a fresh container has none.
      - name: Update
        env:
          OSV_SCANNER: /tmp/osv-scanner
          GITHUB_TOKEN: ${{ github.token }}
        run: scripts/dependency-update --base "${{ github.ref_name }}"