# Evaluates the Nix flake (no build, about a minute): `nix build` / `nix develop` stop at evaluation
# when Cargo.lock gains something nix/package.nix can't vendor, and nothing else would notice.
name: Nix

on:
  push:
    branches: [main]
    paths: ["flake.nix", "flake.lock", "nix/**", "Cargo.lock", ".github/workflows/nix.yml"]
  pull_request:
    paths: ["flake.nix", "flake.lock", "nix/**", "Cargo.lock", ".github/workflows/nix.yml"]
  workflow_dispatch:

permissions:
  contents: read

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

jobs:
  git-sources:
    name: Git dependencies come from storytold
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - name: Git dependencies come from storytold
        run: |
          set -euo pipefail
          test -f Cargo.lock || { echo "Cargo.lock is missing"; exit 1; }
          # Source replacement, patches and path overrides in cargo config never show up
          # in Cargo.lock. Parsed rather than grepped: TOML has many spellings of one key.
          # Cargo still reads the legacy .cargo/config.
          python3 - <<'PY'
          import os, sys, tomllib
          for path in (".cargo/config", ".cargo/config.toml"):
              if not os.path.exists(path):
                  continue
              config = tomllib.load(open(path, "rb"))
              replaced = [name for name, source in config.get("source", {}).items()
                          if isinstance(source, dict) and "replace-with" in source]
              if replaced or "patch" in config or "paths" in config:
                  print(f"{path} replaces, patches or overrides a source")
                  sys.exit(1)
          PY
          # Fails when Cargo.lock is out of date with the manifests.
          cargo metadata --locked --format-version 1 > /dev/null
          python3 - <<'PY'
          import sys, tomllib
          lock = tomllib.load(open("Cargo.lock", "rb"))
          bad = sorted({p["source"] for p in lock.get("package", [])
                        if p.get("source", "").startswith("git+")
                        and not p["source"].startswith("git+https://github.com/storytold/")})
          if bad:
              print("Git dependencies outside github.com/storytold:", *bad, sep="\n")
              sys.exit(1)
          PY

  nix:
    # Intentionally tracked at @main (not SHA-pinned) so org-wide CI improvements, security fixes, and build optimizations propagate without PR churn across all craftapp repos.
    uses: storytold/craft-common-actions/.github/workflows/nix.yml@main