91ab6c9e89
Instead it is provided to the user who can choose whether or not
to include it in the final derivati. Example of including would
be:
```nix
callPackage ... (self: { inherit (self.extras) extraThing; })
```
These extras are also available downstream without being built by
default. This is achieved with `passthru`.
106 lines
3.8 KiB
Nix
106 lines
3.8 KiB
Nix
# Builder for Agda packages. Mostly inspired by the cabal builder.
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#
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# Contact: stdenv.lib.maintainers.fuuzetsu
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{ stdenv, Agda, glibcLocales
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, writeScriptBin
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, extension ? (self: super: {})
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}:
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let
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optionalString = stdenv.lib.optionalString;
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filter = stdenv.lib.filter;
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concatMapStringsSep = stdenv.lib.strings.concatMapStringsSep;
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concatMapStrings = stdenv.lib.strings.concatMapStrings;
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unwords = stdenv.lib.strings.concatStringsSep " ";
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mapInside = xs: unwords (map (x: x + "/*") xs);
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in
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{ mkDerivation = args:
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let
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postprocess = x: x // {
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sourceDirectories = filter (y: !(y == null)) x.sourceDirectories;
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propagatedBuildInputs = filter (y : ! (y == null)) x.propagatedBuildInputs;
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propagatedUserEnvPkgs = filter (y : ! (y == null)) x.propagatedUserEnvPkgs;
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everythingFile = if x.everythingFile == "" then "Everything.agda" else x.everythingFile;
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passthru = { inherit (x) extras; };
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extras = null;
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};
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defaults = self : {
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# There is no Hackage for Agda so we require src.
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inherit (self) src name;
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isAgdaPackage = true;
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buildInputs = [ Agda ] ++ self.buildDepends;
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buildDepends = [];
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buildDependsAgda = filter
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(dep: dep ? isAgdaPackage && dep.isAgdaPackage)
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self.buildDepends;
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buildDependsAgdaShareAgda = map (x: x + "/share/agda") self.buildDependsAgda;
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# Not much choice here ;)
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LANG = "en_US.UTF-8";
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LOCALE_ARCHIVE = optionalString stdenv.isLinux "${glibcLocales}/lib/locale/locale-archive";
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everythingFile = "Everything.agda";
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propagatedBuildInputs = self.buildDependsAgda;
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propagatedUserEnvPkgs = self.buildDependsAgda;
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# Immediate source directories under which modules can be found.
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sourceDirectories = [ ];
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# This is used if we have a top-level element that only serves
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# as the container for the source and we only care about its
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# contents. The directories put here will have their
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# *contents* copied over as opposed to sourceDirectories which
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# would make a direct copy of the whole thing.
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topSourceDirectories = [ "src" ];
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# FIXME: `dirOf self.everythingFile` is what we really want, not hardcoded "./"
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includeDirs = self.buildDependsAgdaShareAgda
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++ self.sourceDirectories ++ self.topSourceDirectories
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++ [ "." ];
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buildFlags = unwords (map (x: "-i " + x) self.includeDirs);
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agdaWithArgs = "${Agda}/bin/agda ${self.buildFlags}";
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buildPhase = ''
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runHook preBuild
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${self.agdaWithArgs} ${self.everythingFile}
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runHook postBuild
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'';
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installPhase = ''
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runHook preInstall
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mkdir -p $out/share/agda
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cp -pR ${unwords self.sourceDirectories} ${mapInside self.topSourceDirectories} $out/share/agda
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runHook postInstall
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'';
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# Optionally-built conveniences
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extras = {
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# Makes a wrapper available to the user. Very useful in
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# nix-shell where all dependencies are -i'd.
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agdaWrapper = writeScriptBin "agda" ''
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${self.agdaWithArgs} "$@"
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'';
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# Use this to stick `agdaWrapper` at the front of the PATH:
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#
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# agda.mkDerivation (self: { PATH = self.extras.agdaWrapperPATH; })
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#
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# Not sure this is the best way to handle conflicts....
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agdaWrapperPATH = "${self.extras.agdaWrapper}/bin:$PATH";
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AGDA_PACKAGE_PATH = concatMapStrings (x: x + ":") self.buildDependsAgdaShareAgda;
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};
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};
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in stdenv.mkDerivation
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(postprocess (let super = defaults self // args self;
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self = super // extension self super;
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in self));
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}
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