nixpkgs/pkgs/build-support/agda/default.nix
John Ericson 33c28bdc83 agda: Agda dependencies are treated seperately
- Only they are added to the optional build path (share/agda)
 - Only they are are passed as an include dir (share/agda)
 - Only they are propigatedBuildInputs
2015-05-20 16:01:04 +00:00

100 lines
3.6 KiB
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;
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;
isAgdaPackage = true;
buildInputs = [ Agda ] ++ self.buildDepends;
buildDepends = [];
buildDependsAgda = filter
(dep: dep ? isAgdaPackage && dep.isAgdaPackage)
self.buildDepends;
buildDependsAgdaShareAgda = map (x: x + "/share/agda") self.buildDependsAgda;
# Not much choice here ;)
LANG = "en_US.UTF-8";
LOCALE_ARCHIVE = optionalString stdenv.isLinux "${glibcLocales}/lib/locale/locale-archive";
everythingFile = "Everything.agda";
propagatedBuildInputs = self.buildDependsAgda;
propagatedUserEnvPkgs = self.buildDependsAgda;
# 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" ];
# FIXME: `dirOf self.everythingFile` is what we really want, not hardcoded "./"
includeDirs = self.buildDependsAgdaShareAgda
++ self.sourceDirectories ++ self.topSourceDirectories
++ [ "." ];
buildFlags = unwords (map (x: "-i " + x) self.includeDirs);
# We expose this as a mere convenience for any tools.
AGDA_PACKAGE_PATH = concatMapStrings (x: x + ":") self.buildDependsAgdaShareAgda;
# 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 = ''
runHook preConfigure
export PATH="${self.agdaWrapper}/bin:$PATH"
runHook postConfigure
'';
buildPhase = ''
runHook preBuild
${Agda}/bin/agda ${self.buildFlags} ${self.everythingFile}
runHook postBuild
'';
installPhase = ''
runHook preInstall
mkdir -p $out/share/agda
cp -pR ${unwords self.sourceDirectories} ${mapInside self.topSourceDirectories} $out/share/agda
runHook postInstall
'';
};
in stdenv.mkDerivation
(postprocess (let super = defaults self // args self;
self = super // extension self super;
in self));
}