sternenseemann
fca19d72bc
This ensures patches and Hackage revisions are applied to the base tarball which may be necessary in order for the packages to build in the shell environment.
72 lines
2.2 KiB
Nix
72 lines
2.2 KiB
Nix
{
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lib,
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writeText,
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srcOnly,
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haskellPackages,
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cabal-install,
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}:
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(haskellPackages.shellFor {
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packages = p: [
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p.constraints
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p.cereal
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];
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# WARNING: When updating this, make sure that the libraries passed to
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# `extraDependencies` are not actually transitive dependencies of libraries in
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# `packages` above. We explicitly want to test that it is possible to specify
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# `extraDependencies` that are not in the closure of `packages`.
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extraDependencies = p: { libraryHaskellDepends = [ p.conduit ]; };
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nativeBuildInputs = [ cabal-install ];
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unpackPhase = ''
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sourceRoot=$(pwd)/scratch
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mkdir -p "$sourceRoot"
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cd "$sourceRoot"
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cp -r "${srcOnly haskellPackages.constraints}" constraints
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cp -r "${srcOnly haskellPackages.cereal}" cereal
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cp ${writeText "cabal.project" "packages: constraints cereal"} cabal.project
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'';
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buildPhase = ''
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export HOME=$(mktemp -d)
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mkdir -p $HOME/.cabal
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touch $HOME/.cabal/config
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# Check that the extraDependencies.libraryHaskellDepends arg is correctly
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# picked up. This uses ghci to interpret a small Haskell program that uses
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# a package from extraDependencies.
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ghci <<EOF
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:set -XOverloadedStrings
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:m + Conduit
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runResourceT $ connect (yield "done") (sinkFile "outfile")
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EOF
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if [[ "done" != "$(cat outfile)" ]]; then
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echo "ERROR: extraDependencies appear not to be available in the environment"
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exit 1
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fi
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# Check packages arg
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cabal v2-build --offline --verbose constraints cereal --ghc-options="-O0 -j$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
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(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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// {
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maintainers = allMaintainers;
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inherit (cabal-install.meta) platforms;
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};
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# `shellFor` adds a `buildCommand` (via `envFunc -> runCommandCC`), which
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# overrides custom phases. To ensure this test's phases run, we remove
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# that `buildCommand` from the derivation.
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buildCommand = null;
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})
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