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stdenv: add stawman docs for makeOverridable

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Also fix a typo in docs in haskell-modules.
This commit is contained in:
Gleb Peregud 2017-06-24 12:42:56 +02:00
parent 5e2de6d846
commit 0123200dee
2 changed files with 19 additions and 1 deletions
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18
lib/customisation.nix
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@ -51,6 +51,24 @@ rec {
else { }));
/* `makeOverridable` takes a function from attribute set to attribute set and
injects `override` attibute which can be used to override arguments of
the function.
nix-repl> x = {a, b}: { result = a + b; }
nix-repl> y = lib.makeOverridable x { a = 1; b = 2; }
nix-repl> y
{ override = «lambda»; overrideDerivation = «lambda»; result = 3; }
nix-repl> y.override { a = 10; }
{ override = «lambda»; overrideDerivation = «lambda»; result = 12; }
Please refer to "Nixpkgs Contributors Guide" section
"<pkg>.overrideDerivation" to learn about `overrideDerivation` and caveats
related to its use.
*/
makeOverridable = f: origArgs:
let
ff = f origArgs;

2
pkgs/development/haskell-modules/make-package-set.nix
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@ -130,7 +130,7 @@ in package-set { inherit pkgs stdenv callPackage; } self // {
in generateExprs name src {}) overrides;
# : { root : Path
# , source-overrides : Defaulted (Either Path VersionNumber
# , source-overrides : Defaulted (Either Path VersionNumber)
# , overrides : Defaulted (HaskellPackageOverrideSet)
# } -> NixShellAwareDerivation
# Given a path to a haskell package directory whose cabal file is