# CodeQL: static analysis for the two languages this repo actually ships.
#
# The reason to have it is not the Scorecard point. The gateway parses untrusted input from a browser
# (a scope query, a merge patch) and hands back objects it has projected; the client merges a stream
# into a document a user is editing. That is where taint tracking earns its runtime.
name: codeql

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  schedule:
    # The schedule matters: it re-runs the current queries against unchanged code, which is how a
    # newly-published query finds an old bug that no push would have re-examined.
    - cron: "40 4 * * 2"

permissions: read-all

jobs:
  analyze:
    name: analyze (${{ matrix.language }})
    runs-on: ubuntu-latest
    timeout-minutes: 20
    permissions:
      security-events: write # the whole point: write the findings to code scanning
      packages: read
      contents: read

    strategy:
      fail-fast: false
      matrix:
        include:
          - language: go
            build-mode: autobuild
          - language: javascript-typescript
            build-mode: none # interpreted; CodeQL reads the source directly

    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      # go.work ties gateway/ and gateway/kube/ together and autobuild honours it, so both modules are
      # analysed. kube being a separate module must not make it the one nobody scans.
      - uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
        if: matrix.language == 'go'
        with:
          go-version-file: gateway/go.mod
          cache: false

      - name: initialize codeql
        uses: github/codeql-action/init@2892aa5e19bbd11bc0cff5427e3b750a04d9e3c2 # v4.38.2
        with:
          languages: ${{ matrix.language }}
          build-mode: ${{ matrix.build-mode }}
          # security-extended, not the default suite: here a false positive costs a few minutes and a
          # missed leak costs a Secret.
          queries: security-extended

      - name: analyze
        uses: github/codeql-action/analyze@2892aa5e19bbd11bc0cff5427e3b750a04d9e3c2 # v4.38.2
        with:
          category: /language:${{ matrix.language }}