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What happens if I push all of nixpkgs
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Nix
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# This argument is a function which selects a list of Haskell packages from any# passed Haskell package set.## Example:# (hpkgs: [ hpkgs.mtl hpkgs.lens ])selectPackages:
# It's probably a good idea to include the library "ghc-paths" in the# compiler environment, because we have a specially patched version of# that package in Nix that honors these environment variables## NIX_GHC# NIX_GHCPKG# NIX_GHC_DOCDIR# NIX_GHC_LIBDIR## instead of hard-coding the paths. The wrapper sets these variables# appropriately to configure ghc-paths to point back to the wrapper# instead of to the pristine GHC package, which doesn't know any of the# additional libraries.## A good way to import the environment set by the wrapper below into# your shell is to add the following snippet to your ~/.bashrc:## if [ -e ~/.nix-profile/bin/ghc ]; then# eval $(grep export ~/.nix-profile/bin/ghc)# fi
let inherit (haskellPackages) llvmPackages ghc;
hoogleWithPackages' = if withHoogle then hoogleWithPackages selectPackages else null;
packages = selectPackages haskellPackages ++ [ hoogleWithPackages' ];
isGhcjs = ghc.isGhcjs or false; isHaLVM = ghc.isHaLVM or false; ghcCommand' = if isGhcjs then "ghcjs" else "ghc"; ghcCommand = "${ghc.targetPrefix}${ghcCommand'}"; ghcCommandCaps = lib.toUpper ghcCommand'; libDir = if isHaLVM then "$out/lib/HaLVM-${ghc.version}" else "$out/lib/${ghc.targetPrefix}${ghc.haskellCompilerName}" + lib.optionalString (ghc ? hadrian) "/lib"; docDir = "$out/share/doc/ghc/html"; packageCfgDir = "${libDir}/package.conf.d"; paths = lib.concatLists ( builtins.map (pkg: [ pkg ] ++ lib.optionals installDocumentation [ (lib.getOutput "doc" pkg) ]) ( lib.filter (x: x ? isHaskellLibrary) (lib.closePropagation packages) ) ); hasLibraries = lib.any (x: x.isHaskellLibrary) paths; # CLang is needed on Darwin for -fllvm to work: # https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/codegens.html#llvm-code-generator-fllvm llvm = lib.makeBinPath ( [ llvmPackages.llvm ] ++ lib.optional stdenv.targetPlatform.isDarwin llvmPackages.clang );in
assert ghcLibdir != null -> (ghc.isGhcjs or false);
if paths == [ ] && !useLLVM then ghcelse symlinkJoin { # this makes computing paths from the name attribute impossible; # if such a feature is needed, the real compiler name should be saved # as a dedicated drv attribute, like `compiler-name` name = ghc.name + "-with-packages"; paths = paths ++ [ ghc ] ++ lib.optionals installDocumentation [ (lib.getOutput "doc" ghc) ]; nativeBuildInputs = [ makeWrapper ]; postBuild = '' # wrap compiler executables with correct env variables
for prg in ${ghcCommand} ${ghcCommand}i ${ghcCommand}-${ghc.version} ${ghcCommand}i-${ghc.version}; do if [[ -x "${ghc}/bin/$prg" ]]; then rm -f $out/bin/$prg makeWrapper ${ghc}/bin/$prg $out/bin/$prg \ --add-flags '"-B$NIX_${ghcCommandCaps}_LIBDIR"' \ --set "NIX_${ghcCommandCaps}" "$out/bin/${ghcCommand}" \ --set "NIX_${ghcCommandCaps}PKG" "$out/bin/${ghcCommand}-pkg" \ --set "NIX_${ghcCommandCaps}_DOCDIR" "${docDir}" \ --set "NIX_${ghcCommandCaps}_LIBDIR" "${libDir}" \ ${ lib.optionalString (ghc.isGhcjs or false) ''--set NODE_PATH "${ghc.socket-io}/lib/node_modules"'' } \ ${lib.optionalString useLLVM ''--prefix "PATH" ":" "${llvm}"''} fi done
for prg in runghc runhaskell; do if [[ -x "${ghc}/bin/$prg" ]]; then rm -f $out/bin/$prg makeWrapper ${ghc}/bin/$prg $out/bin/$prg \ --add-flags "-f $out/bin/${ghcCommand}" \ --set "NIX_${ghcCommandCaps}" "$out/bin/${ghcCommand}" \ --set "NIX_${ghcCommandCaps}PKG" "$out/bin/${ghcCommand}-pkg" \ --set "NIX_${ghcCommandCaps}_DOCDIR" "${docDir}" \ --set "NIX_${ghcCommandCaps}_LIBDIR" "${libDir}" fi done
for prg in ${ghcCommand}-pkg ${ghcCommand}-pkg-${ghc.version}; do if [[ -x "${ghc}/bin/$prg" ]]; then rm -f $out/bin/$prg makeWrapper ${ghc}/bin/$prg $out/bin/$prg --add-flags "--global-package-db=${packageCfgDir}" fi done
# haddock was referring to the base ghc, https://github.com/NixOS/nixpkgs/issues/36976 if [[ -x "${ghc}/bin/haddock" ]]; then rm -f $out/bin/haddock makeWrapper ${ghc}/bin/haddock $out/bin/haddock \ --add-flags '"-B$NIX_${ghcCommandCaps}_LIBDIR"' \ --set "NIX_${ghcCommandCaps}_LIBDIR" "${libDir}" fi
'' + (lib.optionalString (stdenv.targetPlatform.isDarwin && !isGhcjs && !stdenv.targetPlatform.isiOS) '' # Work around a linker limit in macOS Sierra (see generic-builder.nix): local packageConfDir="${packageCfgDir}"; local dynamicLinksDir="$out/lib/links"; mkdir -p $dynamicLinksDir # Clean up the old links that may have been (transitively) included by # symlinkJoin: rm -f $dynamicLinksDir/*
dynamicLibraryDirs=()
for pkg in $($out/bin/ghc-pkg list --simple-output); do dynamicLibraryDirs+=($($out/bin/ghc-pkg --simple-output field "$pkg" dynamic-library-dirs)) done
for dynamicLibraryDir in $(echo "''${dynamicLibraryDirs[@]}" | tr ' ' '\n' | sort -u); do echo "Linking $dynamicLibraryDir/*.dylib from $dynamicLinksDir" find "$dynamicLibraryDir" -name '*.dylib' -exec ln -s {} "$dynamicLinksDir" \; done
for f in $packageConfDir/*.conf; do # Initially, $f is a symlink to a read-only file in one of the inputs # (as a result of this symlinkJoin derivation). # Replace it with a copy whose dynamic-library-dirs points to # $dynamicLinksDir cp $f $f-tmp rm $f sed "N;s,dynamic-library-dirs:\s*.*\n,dynamic-library-dirs: $dynamicLinksDir\n," $f-tmp > $f rm $f-tmp done '' ) + '' ${lib.optionalString hasLibraries '' # GHC 8.10 changes. # Instead of replacing package.cache[.lock] with the new file, # ghc-pkg is now trying to open the file. These file are symlink # to another nix derivation, so they are not writable. Removing # them allow the correct behavior of ghc-pkg recache # See: https://github.com/NixOS/nixpkgs/issues/79441 rm ${packageCfgDir}/package.cache.lock rm ${packageCfgDir}/package.cache
$out/bin/${ghcCommand}-pkg recache ''} ${ # ghcjs will read the ghc_libdir file when resolving plugins. lib.optionalString (isGhcjs && ghcLibdir != null) '' mkdir -p "${libDir}" rm -f "${libDir}/ghc_libdir" printf '%s' '${ghcLibdir}' > "${libDir}/ghc_libdir" '' } $out/bin/${ghcCommand}-pkg check '' + postBuild; preferLocalBuild = true; passthru = { inherit (ghc) version meta;
hoogle = hoogleWithPackages';
# Inform users about backwards incompatibilities with <= 21.05 override = _: throw '' The ghc.withPackages wrapper itself can now be overridden, but no longer the result of calling it (as before). Consequently overrides need to be adjusted: Instead of
(ghc.withPackages (p: [ p.my-package ])).override { withLLLVM = true; }
use
(ghc.withPackages.override { useLLVM = true; }) (p: [ p.my-package ])
Also note that withLLVM has been renamed to useLLVM for consistency with the GHC Nix expressions.''; }; }