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lib: Add getName to mirror getVersion

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This commit is contained in:
John Ericson 2019-11-24 16:19:32 +00:00
parent 62d6429793
commit 84a105254d
2 changed files with 19 additions and 1 deletions
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3
lib/default.nix
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@ -84,7 +84,8 @@ let
hasInfix hasPrefix hasSuffix stringToCharacters stringAsChars escape
escapeShellArg escapeShellArgs replaceChars lowerChars
upperChars toLower toUpper addContextFrom splitString
removePrefix removeSuffix versionOlder versionAtLeast getVersion
removePrefix removeSuffix versionOlder versionAtLeast
getName getVersion
nameFromURL enableFeature enableFeatureAs withFeature
withFeatureAs fixedWidthString fixedWidthNumber isStorePath
toInt readPathsFromFile fileContents;

17
lib/strings.nix
View File

@ -472,6 +472,23 @@ rec {
*/
versionAtLeast = v1: v2: !versionOlder v1 v2;
/* This function takes an argument that's either a derivation or a
derivation's "name" attribute and extracts the name part from that
argument.
Example:
getName "youtube-dl-2016.01.01"
=> "youtube-dl"
getName pkgs.youtube-dl
=> "youtube-dl"
*/
getName = x:
let
parse = drv: (builtins.parseDrvName drv).name;
in if isString x
then parse x
else x.pname or (parse x.name);
/* This function takes an argument that's either a derivation or a
derivation's "name" attribute and extracts the version part from that
argument.