name: CodeQL

# Static analysis via GitHub's CodeQL. Runs on every push to main, on
# every PR targeting main, and weekly to pick up new query updates from
# the GitHub Security Lab against unchanged code.
#
# Replaces the GitHub-managed "Default setup" — same analysis (Go +
# Actions, default query suite, remote threat model) but committed as
# a workflow so we get:
#   - concurrency cancellation (a fresh push cancels in-flight runs)
#   - SHA-pinned actions (Renovate-tracked, satisfies Scorecard's
#     Pinned-Dependencies and SAST checks)
#   - explicit path filtering (skip dev/ and test/ noise)

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  schedule:
    - cron: "23 5 * * 1"

permissions: {}

concurrency:
  group: codeql-${{ github.ref }}
  cancel-in-progress: true

jobs:
  analyze:
    name: Analyze (${{ matrix.language }})
    runs-on: ubuntu-latest
    timeout-minutes: 30
    permissions:
      security-events: write # upload SARIF
      packages: read # read deps from GHCR if any
      contents: read
    strategy:
      fail-fast: false
      matrix:
        language: [actions, go]
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6
        if: matrix.language == 'go'
        with:
          go-version-file: go.mod

      - uses: github/codeql-action/init@54f647b7e1bb85c95cddabcd46b0c578ec92bc1a # v4
        with:
          languages: ${{ matrix.language }}
          config-file: ./.github/codeql/codeql-config.yml

      - uses: github/codeql-action/analyze@54f647b7e1bb85c95cddabcd46b0c578ec92bc1a # v4
        with:
          category: "/language:${{ matrix.language }}"