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nixpkgs/pkgs/lib/strings-with-deps.nix
Yury G. Kudryashov da57804fff Merged with trunk again
svn path=/nixpkgs/branches/stdenv-updates/; revision=10267
2008-01-23 18:11:03 +00:00

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Nix

/*
Usage:
You define you custom builder script by adding all build steps to a list.
for example:
builder = writeScript "fsg-4.4-builder"
(textClosure [doUnpack addInputs preBuild doMake installPhase doForceShare]);
a step is defined by noDepEntry, FullDepEntry or PackEntry.
To ensure that prerequisite are met those are added before the task itself by
textClosureDupList. Duplicated items are removed again.
See trace/nixpkgs/trunk/pkgs/top-level/builder-defs.nix for some predefined build steps
*/
args:
with args;
with lib;
let
inherit (builtins)
head tail isList isAttrs;
in
rec {
/*
let shelllib = rec {
a= {
text = "aaaa";
deps = [b c];
};
b = {
text = "b";
};
c = {
text = "c";
deps = [];
};
};
in
[textClosure [shelllib.a]
textclosure shelllib.a];
*/
textClosureDupList = arg:
(
if isList arg then
textClosureDupList {text = ""; deps = arg;}
else
(concatLists (map textClosureDupList arg.deps)) ++ [arg]
);
textClosureDupListOverridable = predefined: arg:
(
if isList arg then
textClosureDupListOverridable predefined {text = ""; deps = arg;}
else if isAttrs arg then
(concatLists (map (textClosureDupListOverridable predefined) arg.deps)) ++ [arg]
else
textClosureDupListOverridable predefined (getAttr [arg] [] predefined)
);
textClosureListOverridable = predefined: arg:
(map (x : x.text)
(uniqList {inputList = textClosureDupListOverridable predefined arg;}));
textClosureOverridable = predefined: arg: concatStringsSep "\n" (textClosureListOverridable predefined arg);
textClosureMapOveridable = f: predefined: arg:
concatStringsSep "\n" (map f (textClosureListOverridable predefined arg));
noDepEntry = text : {inherit text;deps = [];};
FullDepEntry = text : deps: {inherit text deps;};
PackEntry = deps: {inherit deps; text="";};
}