Make stacklock2nix work even if no local packages are specified #179
Workflow file for this run
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| name: CI | |
| # Trigger the workflow on push or pull request, but only for the master branch | |
| on: | |
| pull_request: | |
| push: | |
| branches: [main] | |
| jobs: | |
| # This workflow defines two different jobs that are very similar: | |
| # nix-commit-from-ci and nix-commit-from-flake-lock. | |
| # | |
| # The difference is what version of stacklock2nix is used in the | |
| # my-example-haskell-lib-easy/flake.lock and | |
| # my-example-haskell-lib-advanced/flake.lock files. | |
| # | |
| # nix-commit-from-ci uses the stacklock2nix dependency from the code that is | |
| # running through CI. This is what you'd expect to be tested. | |
| # | |
| # nix-commit-from-flake-lock uses the version of stacklock2nix that is locked | |
| # in the respective flake.lock files. | |
| # | |
| # This is only necessary because Nix's relative-path support for flakes is broken: | |
| # | |
| # - https://github.com/NixOS/nix/issues/3978 | |
| # - https://discourse.nixos.org/t/relative-path-support-for-nix-flakes/18795 | |
| # | |
| # Because Nix's relative-path support for flakes is broken, the | |
| # my-example-haskell-lib-easy/flake.lock and | |
| # my-example-haskell-lib-advanced/flake.lock files are locked to | |
| # the upstream stacklock2nix repo on GitHub, instead of just the repository top-level | |
| # flake.nix. | |
| # | |
| # It is necessary to test these two Haskell projects against the version of | |
| # stacklock2nix that is locked in the two flake.lock files because end-users | |
| # might try to directly use one of the Haskell projects without updating the | |
| # stacklock2nix to the latest version. The expectation is that they will | |
| # work as-is. | |
| nix-commit-from-ci: | |
| name: nix / ubuntu-latest / using stacklock2nix commit from CI | |
| runs-on: ubuntu-latest | |
| steps: | |
| - uses: actions/checkout@v2 | |
| - uses: cachix/install-nix-action@v22 | |
| - uses: DeterminateSystems/magic-nix-cache-action@v1 | |
| - name: Check that easy project and advanced project are locked to same Nixpkgs | |
| run: | | |
| are_same=$(nix eval --impure --expr 'let easy-rev = (builtins.fromJSON (builtins.readFile ./my-example-haskell-lib-easy/flake.lock)).nodes.nixpkgs.locked.rev; advanced-rev = (builtins.fromJSON (builtins.readFile ./my-example-haskell-lib-advanced/flake.lock)).nodes.nixpkgs.locked.rev; in easy-rev == advanced-rev') | |
| if [ "$are_same" != "true" ]; then | |
| echo "ERROR: The ./my-example-haskell-lib-easy/flake.lock and ./my-example-haskell-lib-advanced/flake.lock files are locked to different versions of Nixpkgs" | |
| exit 1 | |
| fi | |
| # The ./my-example-haskell-lib-easy/flake.nix is locked to the main | |
| # branch of stacklock2nix, but we want to use the stacklock2nix that is | |
| # currently being tested here in CI. | |
| - name: "Easy Example: Update Flake stacklock2nix Input" | |
| run: | | |
| sed -i -e 's|^ inputs.stacklock2nix.url = .*$| inputs.stacklock2nix.url = "path:'"$(realpath ..)"'";|' ./flake.nix | |
| cat ./flake.nix | |
| nix flake lock --update-input stacklock2nix | |
| cat ./flake.lock | |
| working-directory: "./my-example-haskell-lib-easy/" | |
| - name: "Advanced Example: Update Flake stacklock2nix Input" | |
| run: | | |
| sed -i -e 's|^ inputs.stacklock2nix.url = .*$| inputs.stacklock2nix.url = "path:'"$(realpath ..)"'";|' ./flake.nix | |
| cat ./flake.nix | |
| nix flake lock --update-input stacklock2nix | |
| cat ./flake.lock | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Easy Example: Build with Nix" | |
| run: nix build -L | |
| working-directory: "./my-example-haskell-lib-easy/" | |
| - name: "Easy Example: Build with Cabal" | |
| run: "nix develop -L --command cabal build all" | |
| working-directory: "./my-example-haskell-lib-easy/" | |
| - name: "Easy Example: Test with Cabal" | |
| run: "nix develop -L --command cabal test all" | |
| working-directory: "./my-example-haskell-lib-easy/" | |
| - name: "Advanced Example: Build with Nix" | |
| run: nix build -L | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Advanced Example: Generate my-example-haskell-lib/my-example-haskell-lib.cabal" | |
| run: "nix develop -L --command hpack my-example-haskell-lib" | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Advanced Example: Build with Cabal" | |
| run: "nix develop -L --command cabal build all" | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Advanced Example: Test with Cabal" | |
| run: "nix develop -L --command cabal test all" | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Tests" | |
| run: "nix-build" | |
| working-directory: "./test/" | |
| nix-commit-from-flake-lock: | |
| name: nix / ubuntu-latest / using stacklock2nix commit from flake.lock | |
| runs-on: ubuntu-latest | |
| steps: | |
| - uses: actions/checkout@v2 | |
| - uses: cachix/install-nix-action@v22 | |
| - uses: DeterminateSystems/magic-nix-cache-action@v1 | |
| - name: "Easy Example: Build with Nix" | |
| run: nix build -L | |
| working-directory: "./my-example-haskell-lib-easy/" | |
| - name: "Easy Example: Build with Cabal" | |
| run: "nix develop -L --command cabal build all" | |
| working-directory: "./my-example-haskell-lib-easy/" | |
| - name: "Easy Example: Test with Cabal" | |
| run: "nix develop -L --command cabal test all" | |
| working-directory: "./my-example-haskell-lib-easy/" | |
| - name: "Advanced Example: Build with Nix" | |
| run: nix build -L | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Advanced Example: Generate my-example-haskell-lib/my-example-haskell-lib.cabal" | |
| run: "nix develop -L --command hpack my-example-haskell-lib" | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Advanced Example: Build with Cabal" | |
| run: "nix develop -L --command cabal build all" | |
| working-directory: "./my-example-haskell-lib-advanced/" | |
| - name: "Advanced Example: Test with Cabal" | |
| run: "nix develop -L --command cabal test all" | |
| working-directory: "./my-example-haskell-lib-advanced/" |