diff options
| -rw-r--r-- | lib/attrsets.nix | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/attrsets.nix b/lib/attrsets.nix index 4161fa546c8..9104ff35d19 100644 --- a/lib/attrsets.nix +++ b/lib/attrsets.nix @@ -438,6 +438,18 @@ rec { overrideExisting = old: new: old // listToAttrs (map (attr: nameValuePair attr (attrByPath [attr] old.${attr} new)) (attrNames old)); + /* Get a package output. + If no output is found, fallback to `.out` and then to the default. + + Example: + getOutput "dev" pkgs.openssl + => "/nix/store/9rz8gxhzf8sw4kf2j2f1grr49w8zx5vj-openssl-1.0.1r-dev" + */ + getOutput = output: pkg: + if pkg.outputUnspecified or false + then pkg.${output} or pkg.out or pkg + else pkg; + /*** deprecated stuff ***/ |