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lib.getVersion: extend the function to cope with strings as well as derivations

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Peter Simons 2016-01-05 20:08:22 +01:00
parent 9af5091992
commit 7ca8e13918
1 changed files with 7 additions and 3 deletions
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10
lib/strings.nix
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@ -189,9 +189,13 @@ rec {
versionAtLeast = v1: v2: !versionOlder v1 v2;
# Get the version of the specified derivation, as specified in its
# ‘name’ attribute.
getVersion = drv: (builtins.parseDrvName drv.name).version;
# This function takes an argument that's either a derivation or a
# derivation's "name" attribute and extracts the version part from that
# argument. For example:
#
# lib.getVersion "youtube-dl-2016.01.01" ==> "2016.01.01"
# lib.getVersion pkgs.youtube-dl ==> "2016.01.01"
getVersion = x: (builtins.parseDrvName (x.name or x)).version;
# Extract name with version from URL. Ask for separator which is