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nixpkgs/pkgs/build-support/agda/default.nix
2014-09-01 01:05:48 +01:00

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Nix

# Builder for Agda packages. Mostly inspired by the cabal builder.
#
# Contact: stdenv.lib.maintainers.fuuzetsu
{ stdenv, Agda, glibcLocales
, writeScriptBin
, extension ? (self: super: {})
}:
let
optionalString = stdenv.lib.optionalString;
filter = stdenv.lib.filter;
concatMapStringsSep = stdenv.lib.strings.concatMapStringsSep;
concatMapStrings = stdenv.lib.strings.concatMapStrings;
unwords = stdenv.lib.strings.concatStringsSep " ";
mapInside = xs: unwords (map (x: x + "/*") xs);
in
{ mkDerivation = args:
let
postprocess = x: x // {
sourceDirectories = filter (y: !(y == null)) x.sourceDirectories;
propagatedBuildInputs = filter (y : ! (y == null)) x.propagatedBuildInputs;
propagatedUserEnvPkgs = filter (y : ! (y == null)) x.propagatedUserEnvPkgs;
extraBuildFlags = filter (y : ! (y == null)) x.extraBuildFlags;
everythingFile = if x.everythingFile == "" then "Everything.agda" else x.everythingFile;
};
defaults = self : {
# There is no Hackage for Agda so we require src.
inherit (self) src name;
buildInputs = [ Agda ] ++ self.buildDepends;
buildDepends = [];
# Not much choice here ;)
LANG = "en_US.UTF-8";
LOCALE_ARCHIVE = optionalString stdenv.isLinux "${glibcLocales}/lib/locale/locale-archive";
everythingFile = "Everything.agda";
propagatedBuildInputs = self.buildDepends ++ self.buildTools;
propagatedUserEnvPkgs = self.buildDepends;
# Immediate source directories under which modules can be found.
sourceDirectories = [ ];
# This is used if we have a top-level element that only serves
# as the container for the source and we only care about its
# contents. The directories put here will have their
# *contents* copied over as opposed to sourceDirectories which
# would make a direct copy of the whole thing.
topSourceDirectories = [ "src" ];
buildTools = [];
# Extra stuff to pass to the Agda binary.
extraBuildFlags = [ "-i ." ];
buildFlags = let r = map (x: "-i " + x + "/share/agda") self.buildDepends;
d = map (x : "-i " + x) (self.sourceDirectories ++ self.topSourceDirectories);
in unwords (r ++ d ++ self.extraBuildFlags);
# We expose this as a mere convenience for any tools.
AGDA_PACKAGE_PATH = concatMapStrings (x: x + ":") self.buildDepends;
# Makes a wrapper available to the user. Very useful in
# nix-shell where all dependencies are -i'd.
agdaWrapper = writeScriptBin "agda" ''
${Agda}/bin/agda ${self.buildFlags} "$@"
'';
# configurePhase is idempotent
configurePhase = ''
eval "$preConfigure"
export AGDA_PACKAGE_PATH=${self.AGDA_PACKAGE_PATH};
export PATH="${self.agdaWrapper}/bin:$PATH"
eval "$postConfigure"
'';
buildPhase = ''
eval "$preBuild"
${Agda}/bin/agda ${self.buildFlags} ${self.everythingFile}
eval "$postBuild"
'';
installPhase = ''
eval "$preInstall"
mkdir -p $out/share/agda
cp -pR ${unwords self.sourceDirectories} ${mapInside self.topSourceDirectories} $out/share/agda
eval "$postInstall"
'';
};
in stdenv.mkDerivation
(postprocess (let super = defaults self // args self;
self = super // extension self super;
in self));
}