check-dependencies.yml

name: "Check Dependencies"
on:
  workflow_dispatch:
  schedule:
    - cron: '30 5 * * 1' # At 05:30 AM, only on Monday
  pull_request:
    paths:
      - '.github/workflows/check-dependencies.yml'
      - '.github/scripts/**'
      - 'flake.*'
jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@main
      - name: lookup nix versions
        id: nixpkgs
        run: |
          NIXPKGS_REV="$(jq -r '.nodes.nixpkgs_2.locked.rev' < flake.lock)"
          VERSIONS="$(nix eval -I "nixpkgs=https://github.com/NixOS/nixpkgs/archive/$NIXPKGS_REV.tar.gz" --impure --json \
                      --expr 'let pkgs = (import <nixpkgs> {}); in { "secp256k1" = pkgs.secp256k1.version; "ff" = pkgs.libff.version; }')"
          LIBFF_REV="$(jq .ff -r <<<"$VERSIONS")"
          LIBSECP256K1_REV="$(jq .secp256k1 -r <<<"$VERSIONS")"
          { echo "nixpkgs=$NIXPKGS_REV"; echo "libff=$LIBFF_REV"; echo "libsecp256k1=$LIBSECP256K1_REV"; } >> "$GITHUB_OUTPUT"
      - name: lookup local versions
        id: local
        run: |
          LIBFF_REV="$(grep '^INSTALL_VERSION=' .github/scripts/install-libff.sh | cut -f2 -d=)"
          LIBSECP256K1_REV="$(grep '^INSTALL_VERSION=' .github/scripts/install-libsecp256k1.sh | cut -f2 -d=)"
          { echo "libff=$LIBFF_REV"; echo "libsecp256k1=$LIBSECP256K1_REV"; } >> "$GITHUB_OUTPUT"
      - name: compare versions
        run: |
          if [ "${{ steps.nixpkgs.outputs.libff }}" != "${{ steps.local.outputs.libff }}" ]; then
            echo "libff versions do not match! nix=${{ steps.nixpkgs.outputs.libff }} local=${{ steps.local.outputs.libff }}"
            exit 1
          fi
          if [ "${{ steps.nixpkgs.outputs.libsecp256k1 }}" != "${{ steps.local.outputs.libsecp256k1 }}" ]; then
            echo "libsecp256k1 versions do not match! nix=${{ steps.nixpkgs.outputs.libsecp256k1 }} local=${{ steps.local.outputs.libsecp256k1 }}"
            exit 1
          fi