2e87d165f7
An example use case is when you have Haskell scripts that use libraries that don't occur in your packages' dependencies.
48 lines
1.4 KiB
Nix
48 lines
1.4 KiB
Nix
{ lib, writeText, haskellPackages, cabal-install }:
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(haskellPackages.shellFor {
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packages = p: [ p.constraints p.linear ];
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extraDependencies = p: { libraryHaskellDepends = [ p.releaser ]; };
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nativeBuildInputs = [ cabal-install ];
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phases = [ "unpackPhase" "buildPhase" "installPhase" ];
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unpackPhase = ''
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sourceRoot=$(pwd)/scratch
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mkdir -p "$sourceRoot"
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cd "$sourceRoot"
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tar -xf ${haskellPackages.constraints.src}
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tar -xf ${haskellPackages.linear.src}
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cp ${writeText "cabal.project" "packages: constraints* linear*"} cabal.project
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'';
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buildPhase = ''
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export HOME=$(mktemp -d)
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mkdir -p $HOME/.cabal
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touch $HOME/.cabal/config
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# Check extraDependencies.libraryHaskellDepends arg
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ghci <<EOF
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:m + Releaser.Primitives
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:m + System.IO
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writeFile "done" "done"
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EOF
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[[ done == $(cat done) ]]
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# Check packages arg
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cabal v2-build --offline --verbose constraints linear --ghc-options="-O0 -j$NIX_BUILD_CORES"
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'';
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installPhase = ''
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touch $out
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'';
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}).overrideAttrs (oldAttrs: {
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meta =
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let
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oldMeta = oldAttrs.meta or {};
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oldMaintainers = oldMeta.maintainers or [];
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additionalMaintainers = with lib.maintainers; [ cdepillabout ];
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allMaintainers = oldMaintainers ++ additionalMaintainers;
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in
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oldMeta // {
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maintainers = allMaintainers;
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inherit (cabal-install.meta) platforms;
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};
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})
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