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f1e3a6961b
This is necessary when a very large number of packages are included in the package database. Without this change, setting up the build environment will fail, since the environment will be too large. This simply applies the technique mentioned in https://github.com/NixOS/nixpkgs/issues/25057 to solve this problem.
126 lines
3.8 KiB
Nix
126 lines
3.8 KiB
Nix
# Install not only the Hoogle library and executable, but also a local Hoogle
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# database which provides "Source" links to all specified 'packages' -- or the
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# current Haskell Platform if no custom package set is provided.
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#
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# It is intended to be used in config.nix similarly to:
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#
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# { packageOverrides = pkgs: rec {
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#
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# haskellPackages =
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# let callPackage = pkgs.lib.callPackageWith haskellPackages;
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# in pkgs.recurseIntoAttrs (pkgs.haskellPackages.override {
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# extension = self: super: {
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# hoogleLocal = pkgs.haskellPackages.hoogleLocal.override {
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# packages = with pkgs.haskellPackages; [
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# mmorph
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# monadControl
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# ];
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# };
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# };
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# });
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# }}
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#
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# This will build mmorph and monadControl, and have the hoogle installation
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# refer to their documentation via symlink so they are not garbage collected.
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{ lib, stdenv, hoogle, writeText, ghc
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, packages
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}:
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let
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wrapper = ./hoogle-local-wrapper.sh;
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isGhcjs = ghc.isGhcjs or false;
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opts = lib.optionalString;
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haddockExe =
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if !isGhcjs
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then "haddock"
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else "haddock-ghcjs";
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ghcDocLibDir =
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if !isGhcjs
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then ghc.doc + ''/share/doc/ghc*/html/libraries''
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else ghc + ''/doc/lib'';
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# On GHCJS, use a stripped down version of GHC's prologue.txt
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prologue =
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if !isGhcjs
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then "${ghcDocLibDir}/prologue.txt"
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else writeText "ghcjs-prologue.txt" ''
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This index includes documentation for many Haskell modules.
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'';
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# TODO: closePropagation is deprecated; replace
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docPackages = lib.closePropagation
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# we grab the doc outputs
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(map (lib.getOutput "doc") packages);
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in
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stdenv.mkDerivation {
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name = "hoogle-local-0.1";
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buildInputs = [ghc hoogle];
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inherit docPackages;
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passAsFile = ["buildCommand"];
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buildCommand = ''
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${lib.optionalString (packages != [] -> docPackages == [])
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("echo WARNING: localHoogle package list empty, even though"
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+ " the following were specified: "
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+ lib.concatMapStringsSep ", " (p: p.name) packages)}
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mkdir -p $out/share/doc/hoogle
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echo importing builtin packages
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for docdir in ${ghcDocLibDir}"/"*; do
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name="$(basename $docdir)"
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${opts isGhcjs ''docdir="$docdir/html"''}
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if [[ -d $docdir ]]; then
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ln -sfn $docdir $out/share/doc/hoogle/$name
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fi
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done
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echo importing other packages
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${lib.concatMapStringsSep "\n" (el: ''
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ln -sfn ${el.haddockDir} "$out/share/doc/hoogle/${el.name}"
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'')
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(lib.filter (el: el.haddockDir != null)
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(builtins.map (p: { haddockDir = if p ? haddockDir then p.haddockDir p else null;
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name = p.pname; })
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docPackages))}
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echo building hoogle database
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hoogle generate --database $out/share/doc/hoogle/default.hoo --local=$out/share/doc/hoogle
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echo building haddock index
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# adapted from GHC's gen_contents_index
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cd $out/share/doc/hoogle
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args=
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for hdfile in $(ls -1 *"/"*.haddock | grep -v '/ghc\.haddock' | sort); do
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name_version=`echo "$hdfile" | sed 's#/.*##'`
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args="$args --read-interface=$name_version,$hdfile"
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done
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${ghc}/bin/${haddockExe} --gen-index --gen-contents -o . \
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-t "Haskell Hierarchical Libraries" \
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-p ${prologue} \
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$args
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echo finishing up
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mkdir -p $out/bin
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substitute ${wrapper} $out/bin/hoogle \
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--subst-var out --subst-var-by shell ${stdenv.shell} \
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--subst-var-by hoogle ${hoogle}
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chmod +x $out/bin/hoogle
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'';
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passthru = {
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isHaskellLibrary = false; # for the filter in ./with-packages-wrapper.nix
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};
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meta = {
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description = "A local Hoogle database";
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platforms = ghc.meta.platforms;
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hydraPlatforms = with stdenv.lib.platforms; none;
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maintainers = with stdenv.lib.maintainers; [ ttuegel ];
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};
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}
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