name: Security scan

# Why this exists: the one accurate external report we ever received was
# Postgres credentials committed to public repo history. The finding itself
# was cheap to fix; what was missing was a gate that would have caught it
# before the push. This is that gate.

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

permissions:
  contents: read

jobs:
  secrets:
    name: Secret scan (gitleaks)
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          # Full history so a secret introduced in an earlier commit on the
          # branch is caught, not just the tip diff.
          fetch-depth: 0

      - name: gitleaks
        uses: gitleaks/gitleaks-action@v2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}