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lib/versions: add pad

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Pad a version string with zeros to match a given number of components.
This commit is contained in:
Naïm Favier 2022-12-20 18:38:47 +01:00
parent 3ff39f984f
commit 0355479715
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2 changed files with 30 additions and 0 deletions
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15
lib/tests/misc.nix
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@ -212,6 +212,21 @@ runTests {
expected = [ "1" "2" "3" ];
};
testPadVersionLess = {
expr = versions.pad 3 "1.2";
expected = "1.2.0";
};
testPadVersionLessExtra = {
expr = versions.pad 3 "1.3-rc1";
expected = "1.3.0-rc1";
};
testPadVersionMore = {
expr = versions.pad 3 "1.2.3.4";
expected = "1.2.3";
};
testIsStorePath = {
expr =
let goodPath =

15
lib/versions.nix
View file

@ -46,4 +46,19 @@ rec {
builtins.concatStringsSep "."
(lib.take 2 (splitVersion v));
/* Pad a version string with zeros to match the given number of components.
Example:
pad 3 "1.2"
=> "1.2.0"
pad 3 "1.3-rc1"
=> "1.3.0-rc1"
pad 3 "1.2.3.4"
=> "1.2.3"
*/
pad = n: version: let
numericVersion = lib.head (lib.splitString "-" version);
versionSuffix = lib.removePrefix numericVersion version;
in lib.concatStringsSep "." (lib.take n (lib.splitVersion numericVersion ++ lib.genList (_: "0") n)) + versionSuffix;
}