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| author | Peter Simons <simons@cryp.to> | 2016-01-05 20:08:22 +0100 |
|---|---|---|
| committer | Peter Simons <simons@cryp.to> | 2016-01-05 20:09:39 +0100 |
| commit | 7ca8e139189ff3935dbe6ef12ff014cf8e028e04 (patch) | |
| tree | e4249f4417b298b0760c0b6146f641026fbe6fd0 /lib/strings.nix | |
| parent | 9af50919926f5ee654593a67c3446f0bf2f1a015 (diff) | |
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lib.getVersion: extend the function to cope with strings as well as derivations
Diffstat (limited to 'lib/strings.nix')
| -rw-r--r-- | lib/strings.nix | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/strings.nix b/lib/strings.nix index 098da975c601..fc6c2152b9fc 100644 --- a/lib/strings.nix +++ b/lib/strings.nix @@ -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 |