Matt Sturgeon
134bfa753c
Inspired by treefmt-nix's `config.build.check` option, add a similar check function to `treefmt.withConfig`'s wrapper. `check` is a function of `Path → Derivation`, which returns a derivation that builds ok when the path is already formatted, or fails to build if the wrapped-treefmt would change the path's formatting. Add the `check` function, tests for it, and initial docs. See treefmt-nix: https://github.com/numtide/treefmt-nix/blob/db947814/module-options.nix#L301-L349
51 lines
1.1 KiB
Nix
51 lines
1.1 KiB
Nix
{
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lib,
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gitMinimal,
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runCommandLocal,
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stdenv,
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wrapper,
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}:
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/**
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Test that the given project tree is formatted with the treefmt config.
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Input argument is the path to the project tree.
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*/
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project:
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runCommandLocal "${lib.getName wrapper}-check"
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{
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__structuredAttrs = true;
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strictDeps = true;
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nativeBuildInputs = [
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gitMinimal
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wrapper
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];
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inherit project;
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env = {
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LANG = if stdenv.buildPlatform.isDarwin then "en_US.UTF-8" else "C.UTF-8";
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LC_ALL = if stdenv.buildPlatform.isDarwin then "en_US.UTF-8" else "C.UTF-8";
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};
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meta.description = "Check that the project tree is formatted";
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}
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''
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# Copy project files into the build-dir
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cp -r "$project" project
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chmod -R a+w project
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cd project
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# Setup a git repo
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git init --initial-branch main
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git config user.name nixbld
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git config user.email nixbld@example.com
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git add .
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git commit -m init --quiet
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# Run treefmt
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treefmt --version
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treefmt --no-cache
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# Ensure nothing changed
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git status
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git --no-pager diff --exit-code
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touch "$out"
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''
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