fb83f8605f
The dns packages requires this feature, because it ships two test programs: one of them requires network access (so we cannot run it), but the other test does not. Setting testTarget appropriately allows us to run only one of the two suites.
204 lines
8.5 KiB
Nix
204 lines
8.5 KiB
Nix
# generic builder for Cabal packages
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{ stdenv, fetchurl, lib, pkgconfig, ghc, Cabal, jailbreakCabal
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, enableLibraryProfiling ? false
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, enableCheckPhase ? true
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}:
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# The Cabal library shipped with GHC versions older than 7.x doesn't accept the --enable-tests configure flag.
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assert enableCheckPhase -> stdenv.lib.versionOlder "7" ghc.ghcVersion;
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{
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mkDerivation =
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args : # arguments for the individual package, can modify the defaults
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let # These attributes are removed in the end. This is in order not to spoil the build
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# environment overly, but also to keep hash-backwards-compatible with the old cabal.nix.
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internalAttrs = [
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"internalAttrs" "buildDepends" "buildTools" "extraLibraries" "pkgconfigDepends"
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"isLibrary" "isExecutable" "testDepends"
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];
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# Stuff happening after the user preferences have been processed. We remove
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# internal attributes and strip null elements from the dependency lists, all
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# in the interest of keeping hashes stable.
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postprocess =
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x : (removeAttrs x internalAttrs) // {
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buildInputs = stdenv.lib.filter (y : ! (y == null)) x.buildInputs;
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propagatedBuildInputs = stdenv.lib.filter (y : ! (y == null)) x.propagatedBuildInputs;
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doCheck = enableCheckPhase && x.doCheck;
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};
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defaults =
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self : { # self is the final version of the attribute set
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# pname should be defined by the client to be the package basename
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# version should be defined by the client to be the package version
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# fname is the internal full name of the package
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fname = "${self.pname}-${self.version}";
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# name is the external full name of the package; usually we prefix
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# all packages with haskell- to avoid name clashes for libraries;
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# if that is not desired (for applications), name can be set to
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# fname.
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name = if self.isLibrary then
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if enableLibraryProfiling then
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"haskell-${self.pname}-ghc${ghc.ghc.version}-${self.version}-profiling"
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else
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"haskell-${self.pname}-ghc${ghc.ghc.version}-${self.version}"
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else
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"${self.pname}-${self.version}";
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# the default download location for Cabal packages is Hackage,
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# you still have to specify the checksum
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src = fetchurl {
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# cannot use mirrors system because of subtly different directory structures
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urls = ["http://hackage.haskell.org/packages/archive/${self.pname}/${self.version}/${self.fname}.tar.gz"
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"http://hdiff.luite.com/packages/archive/${self.pname}/${self.fname}.tar.gz"];
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inherit (self) sha256;
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};
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# default buildInputs are just ghc, if more buildInputs are required
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# buildInputs can be extended by the client by using extraBuildInputs,
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# but often propagatedBuildInputs is preferable anyway
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buildInputs = [ghc Cabal] ++ self.extraBuildInputs;
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extraBuildInputs = self.buildTools ++
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(stdenv.lib.optionals self.doCheck self.testDepends) ++
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(if self.pkgconfigDepends == [] then [] else [pkgconfig]) ++
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(if self.isLibrary then [] else self.buildDepends ++ self.extraLibraries ++ self.pkgconfigDepends);
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# we make sure that propagatedBuildInputs is defined, so that we don't
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# have to check for its existence
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propagatedBuildInputs = if self.isLibrary then self.buildDepends ++ self.extraLibraries ++ self.pkgconfigDepends else [];
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# library directories that have to be added to the Cabal files
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extraLibDirs = [];
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# build-depends Cabal field
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buildDepends = [];
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# build-depends Cabal fields stated in test-suite stanzas
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testDepends = [];
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# target(s) passed to the cabal test phase as an argument
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testTarget = "";
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# build-tools Cabal field
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buildTools = [];
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# extra-libraries Cabal field
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extraLibraries = [];
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# pkgconfig-depends Cabal field
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pkgconfigDepends = [];
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isLibrary = ! self.isExecutable;
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isExecutable = false;
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# ignore version restrictions on the build inputs that the cabal file might specify
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jailbreak = false;
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# pass the '--enable-split-objs' flag to cabal in the configure stage
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enableSplitObjs = !( stdenv.isDarwin # http://hackage.haskell.org/trac/ghc/ticket/4013
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|| stdenv.lib.versionOlder "7.6.99" ghc.ghcVersion # -fsplit-ojbs is broken in 7.7 snapshot
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);
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# pass the '--enable-tests' flag to cabal in the configure stage
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# and run any regression test suites the package might have
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doCheck = enableCheckPhase;
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extraConfigureFlags = [
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(stdenv.lib.enableFeature enableLibraryProfiling "library-profiling")
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(stdenv.lib.enableFeature self.enableSplitObjs "split-objs")
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] ++ stdenv.lib.optional (stdenv.lib.versionOlder "7" ghc.ghcVersion) (stdenv.lib.enableFeature self.doCheck "tests");
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# compiles Setup and configures
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configurePhase = ''
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eval "$preConfigure"
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${lib.optionalString self.jailbreak "${jailbreakCabal}/bin/jailbreak-cabal ${self.pname}.cabal"}
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for i in Setup.hs Setup.lhs; do
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test -f $i && ghc --make $i
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done
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for p in $extraBuildInputs $propagatedNativeBuildInputs; do
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if [ -d "$p/lib/ghc-${ghc.ghc.version}/package.conf.d" ]; then
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# Haskell packages don't need any extra configuration.
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continue;
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fi
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if [ -d "$p/include" ]; then
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extraConfigureFlags+=" --extra-include-dirs=$p/include"
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fi
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for d in lib{,64}; do
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if [ -d "$p/$d" ]; then
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extraConfigureFlags+=" --extra-lib-dirs=$p/$d"
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fi
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done
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done
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echo "configure flags: $extraConfigureFlags $configureFlags"
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./Setup configure --verbose --prefix="$out" --libdir='$prefix/lib/$compiler' --libsubdir='$pkgid' $extraConfigureFlags $configureFlags
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eval "$postConfigure"
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'';
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# builds via Cabal
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buildPhase = ''
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eval "$preBuild"
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./Setup build
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export GHC_PACKAGE_PATH=$(${ghc.GHCPackages})
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if [ -n "$noHaddock" ]; then
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export LANG="en_US.UTF-8"
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./Setup haddock
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unset LANG
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fi
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eval "$postBuild"
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'';
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checkPhase = stdenv.lib.optional self.doCheck ''
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eval "$preCheck"
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./Setup test ${self.testTarget}
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eval "$postCheck"
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'';
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# installs via Cabal; creates a registration file for nix-support
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# so that the package can be used in other Haskell-builds; also
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# adds all propagated build inputs to the user environment packages
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installPhase = ''
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eval "$preInstall"
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./Setup copy
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ensureDir $out/bin # necessary to get it added to PATH
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local confDir=$out/lib/ghc-${ghc.ghc.version}/package.conf.d
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local installedPkgConf=$confDir/${self.fname}.installedconf
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local pkgConf=$confDir/${self.fname}.conf
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ensureDir $confDir
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./Setup register --gen-pkg-config=$pkgConf
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if test -f $pkgConf; then
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echo '[]' > $installedPkgConf
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GHC_PACKAGE_PATH=$installedPkgConf ghc-pkg --global register $pkgConf --force
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fi
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eval "$postInstall"
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'';
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postFixup = ''
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if test -f $out/nix-support/propagated-native-build-inputs; then
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ln -s $out/nix-support/propagated-native-build-inputs $out/nix-support/propagated-user-env-packages
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fi
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'';
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# We inherit stdenv and ghc so that they can be used
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# in Cabal derivations.
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inherit stdenv ghc;
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};
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in stdenv.mkDerivation (postprocess ((rec { f = defaults f // args f; }).f)) ;
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}
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