nixpkgs/pkgs/lib/strings-with-deps.nix

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/*
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 {
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="";};
# Old names - don't use.
FullDepEntry = fullDepEntry;
PackEntry = packEntry;
}