nixpkgs/pkgs/development/interpreters/dhall/build-dhall-directory-package.nix

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{ buildDhallPackage, lib }:
# This is a minor variation on `buildDhallPackage` that splits the `code`
# argument into `src` and `file` in such a way that you can easily override
# the `file`
#
# This function is used by `dhall-to-nixpkgs` when given a directory
lib.makePackageOverridable
( { # Arguments passed through to `buildDhallPackage`
name
, dependencies ? []
, source ? false
, src
, # The file to import, relative to the root directory
file ? "package.dhall"
# Set to `true` to generate documentation for the package
, document ? false
}:
buildDhallPackage
( { inherit name dependencies source;
code = "${src}/${file}";
}
// lib.optionalAttrs document { documentationRoot = src; }
)
)