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