license-check.yml

# Copyright (c) 2026 Santander Group
# SPDX-License-Identifier: Apache-2.0
#
# License compliance. genetic-algorithm has no third-party runtime dependencies
# (stdlib-only), so there is no dependency-license allowlist to enforce; this
# workflow verifies that every Python source file declares an
# SPDX-License-Identifier and that no runtime dependency creeps in.
# Replace action references with SHA digests before publishing.

name: License check

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

permissions:
  contents: read

jobs:
  no-runtime-deps:
    name: Assert no runtime dependencies
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
      - name: Fail if a dependency manifest is introduced
        run: |
          set -euo pipefail
          if [ -f requirements.txt ] || grep -qE '^\s*dependencies\s*=' pyproject.toml 2>/dev/null; then
            echo "FAIL: a runtime dependency manifest was introduced."
            echo "genetic-algorithm must remain stdlib-only. If this is intentional,"
            echo "add a dependency-license allowlist job to this workflow."
            exit 1
          fi
          echo "OK: no runtime dependency manifest present."

  spdx-headers:
    name: SPDX headers
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7.0.0
      - name: Verify every Python file declares SPDX-License-Identifier
        run: |
          missing=0
          while IFS= read -r f; do
            if ! head -n 5 "$f" | grep -q "SPDX-License-Identifier:"; then
              echo "MISSING SPDX header: $f"
              missing=$((missing + 1))
            fi
          done < <(find genetic_algorithm tests examples -type f -name "*.py")
          if [ "$missing" -gt 0 ]; then
            echo "Found $missing files without SPDX header."
            exit 1
          fi
          echo "OK: all Python files have SPDX headers."