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1/* Some functions for manipulating meta attributes, as well as the
2 name attribute. */
3
4let lib = import ./default.nix;
5in
6
7rec {
8
9
10 /* Add to or override the meta attributes of the given
11 derivation.
12
13 Example:
14 addMetaAttrs {description = "Bla blah";} somePkg
15 */
16 addMetaAttrs = newAttrs: drv:
17 drv // { meta = (drv.meta or {}) // newAttrs; };
18
19
20 /* Disable Hydra builds of given derivation.
21 */
22 dontDistribute = drv: addMetaAttrs { hydraPlatforms = []; } drv;
23
24
25 /* Change the symbolic name of a package for presentation purposes
26 (i.e., so that nix-env users can tell them apart).
27 */
28 setName = name: drv: drv // {inherit name;};
29
30
31 /* Like `setName', but takes the previous name as an argument.
32
33 Example:
34 updateName (oldName: oldName + "-experimental") somePkg
35 */
36 updateName = updater: drv: drv // {name = updater (drv.name);};
37
38
39 /* Append a suffix to the name of a package (before the version
40 part). */
41 appendToName = suffix: updateName (name:
42 let x = builtins.parseDrvName name; in "${x.name}-${suffix}-${x.version}");
43
44
45 /* Apply a function to each derivation and only to derivations in an attrset
46 */
47 mapDerivationAttrset = f: set: lib.mapAttrs (name: pkg: if lib.isDerivation pkg then (f pkg) else pkg) set;
48
49
50 /* Decrease the nix-env priority of the package, i.e., other
51 versions/variants of the package will be preferred.
52 */
53 lowPrio = drv: addMetaAttrs { priority = 10; } drv;
54
55
56 /* Apply lowPrio to an attrset with derivations
57 */
58 lowPrioSet = set: mapDerivationAttrset lowPrio set;
59
60
61 /* Increase the nix-env priority of the package, i.e., this
62 version/variant of the package will be preferred.
63 */
64 hiPrio = drv: addMetaAttrs { priority = -10; } drv;
65
66
67 /* Apply hiPrio to an attrset with derivations
68 */
69 hiPrioSet = set: mapDerivationAttrset hiPrio set;
70
71}