8c3f749eda
The old expression was broken. This began as an attempt to fix it, but the new expression is substantially different. It takes advantage of new features that obviate the need to patch Hoogle. It comes with several limitations. The new expression does not build the database in parallel, although it does not take long. The new expression also does not support downloading databases from the Hoogle instance at haskell.org; those databases link to Hackage for documentation, defying the meaning of local.
107 lines
3 KiB
Nix
107 lines
3 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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{ stdenv, hoogle, rehoo
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, haskellPlatform, ghc, packages ? [ haskellPlatform ghc.ghc ]
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}:
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let
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inherit (stdenv.lib) optional;
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wrapper = ./hoogle-local-wrapper.sh;
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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 = [hoogle rehoo];
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phases = [ "installPhase" ];
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docPackages = packages;
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installPhase = ''
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if [ -z "$docPackages" ]; then
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echo "ERROR: The packages attribute has not been set"
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exit 1
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fi
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mkdir -p $out/share/hoogle/doc
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export HOOGLE_DOC_PATH=$out/share/hoogle/doc
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cd $out/share/hoogle
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function import_dbs() {
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find $1 -name '*.txt' | while read f; do
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newname=$(basename "$f" | tr '[:upper:]' '[:lower:]')
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if [[ -f $f && ! -f ./$newname ]]; then
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cp -p $f ./$newname
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hoogle convert -d "$(dirname $f)" "./$newname"
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fi
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done
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}
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for i in $docPackages; do
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findInputs $i docPackages propagated-native-build-inputs
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findInputs $i docPackages propagated-build-inputs
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done
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for i in $docPackages; do
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if [[ ! $i == $out ]]; then
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for docdir in $i/share/doc/*-ghc-*/* $i/share/doc/*; do
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if [[ -d $docdir ]]; then
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import_dbs $docdir
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ln -sf $docdir $out/share/hoogle/doc
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fi
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done
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fi
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done
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import_dbs ${ghc}/share/doc/ghc*/html/libraries
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ln -sf ${ghc}/share/doc/ghc*/html/libraries/* $out/share/hoogle/doc
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chmod 644 *.hoo *.txt
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rehoo -j4 -c64 .
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rm -fr downloads *.dep *.txt
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mv default.hoo x || exit 0
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rm -f *.hoo
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mv x default.hoo || exit 1
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if [ ! -f default.hoo ]; then
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echo "Unable to build the default Hoogle database"
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exit 1
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fi
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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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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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