25 lines
817 B
Nix
25 lines
817 B
Nix
{ dhallPackages, dhallPackageToNix}:
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# `dhallDirectoryToNix is a utility function to take a directory of Dhall files
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# and read them in as a Nix expression.
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#
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# This function is similar to `dhallToNix`, but takes a Nixpkgs Dhall package
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# as input instead of raw Dhall code.
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#
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# Note that this uses "import from derivation" (IFD), meaning that Nix will
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# perform a build during the evaluation phase if you use this
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# `dhallDirectoryToNix` utility. It is not possible to use
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# `dhallDirectoryToNix` in Nixpkgs, since the Nixpkgs Hydra doesn't allow IFD.
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{ src
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, # The file to import, relative to the src root directory
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file ? "package.dhall"
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}@args:
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let
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generatedPkg = dhallPackages.generateDhallDirectoryPackage args;
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builtPkg = dhallPackages.callPackage generatedPkg { };
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in
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dhallPackageToNix builtPkg
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