about summary refs log tree commit diff
path: root/third_party/nix/corepkgs/derivation.nix
blob: 1f95cf88ec44a7499fb8377c0b40efa3833656ac (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
/* This is the implementation of the ‘derivation’ builtin function.
   It's actually a wrapper around the ‘derivationStrict’ primop. */

drvAttrs @ { outputs ? [ "out" ], ... }:

let

  strict = derivationStrict drvAttrs;

  commonAttrs = drvAttrs // (builtins.listToAttrs outputsList) //
    {
      all = map (x: x.value) outputsList;
      inherit drvAttrs;
    };

  outputToAttrListElement = outputName:
    {
      name = outputName;
      value = commonAttrs // {
        outPath = builtins.getAttr outputName strict;
        drvPath = strict.drvPath;
        type = "derivation";
        inherit outputName;
      };
    };

  outputsList = map outputToAttrListElement outputs;

in
(builtins.head outputsList).value