459cf94991
The motivation for this change is to enable a new Dhall command-line utility called `dhall-to-nixpkgs` which converts Dhall packages to buildable Nix packages. You can think of `dhall-to-nixpkgs` as the Dhall analog of `cabal2nix`. You can find the matching pull request for `dhall-to-nixpkgs` here: https://github.com/dhall-lang/dhall-haskell/pull/1826 The two main changes required to support `dhall-to-nixpkgs` are: * Two new `buildDhall{Directory,GitHub}Package` utilities are added `dhall-to-nixpkgs` uses these in the generated output * `pkgs.dhallPackages` now selects a default version for each package using the `prefer` utility All other versions are still buildable via a `passthru` attribute
25 lines
609 B
Nix
25 lines
609 B
Nix
{ buildDhallPackage, lib }:
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# This is a minor variation on `buildDhallPackage` that splits the `code`
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# argument into `src` and `file` in such a way that you can easily override
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# the `file`
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#
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# This function is used by `dhall-to-nixpkgs` when given a directory
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lib.makeOverridable
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( { # Arguments passed through to `buildDhallPackage`
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name
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, dependencies ? []
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, source ? false
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, src
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, # The file to import, relative to the root directory
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file ? "package.dhall"
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}:
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buildDhallPackage {
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inherit name dependencies source;
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code = "${src}/${file}";
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}
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)
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