/* 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 */ {stdenv, lib}: with lib; rec { /* !!! The interface of this function is kind of messed up, since it's way too overloaded and almost but not quite computes a topological sort of the depstrings. */ textClosureList = predefined: arg: let f = done: todo: if todo == [] then {result = []; inherit done;} else let entry = head todo; in if isAttrs entry then let x = f done entry.deps; y = f x.done (tail todo); in { result = x.result ++ [entry.text] ++ y.result; done = y.done; } else if hasAttr entry done then f done (tail todo) else f (done // listToAttrs [{name = entry; value = 1;}]) ([(builtins.getAttr entry predefined)] ++ tail todo); in (f {} arg).result; textClosureMap = f: predefined: names: concatStringsSep "\n" (map f (textClosureList predefined names)); 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; }