···

       
438
       
438
       
 
       
  overrideExisting = old: new:

     

       
439
       
439
       
 
       
    old // listToAttrs (map (attr: nameValuePair attr (attrByPath [attr] old.${attr} new)) (attrNames old));

     

       
440
       
440
       
 
       


     

       
441
       
441
       
+
       
  /* Get a package output.

     

       
442
       
442
       
+
       
     If no output is found, fallback to `.out` and then to the default.

     

       
443
       
443
       
+
       


     

       
444
       
444
       
+
       
     Example:

     

       
445
       
445
       
+
       
       getOutput "dev" pkgs.openssl

     

       
446
       
446
       
+
       
       => "/nix/store/9rz8gxhzf8sw4kf2j2f1grr49w8zx5vj-openssl-1.0.1r-dev"

     

       
447
       
447
       
+
       
  */

     

       
448
       
448
       
+
       
  getOutput = output: pkg:

     

       
449
       
449
       
+
       
    if pkg.outputUnspecified or false

     

       
450
       
450
       
+
       
      then pkg.${output} or pkg.out or pkg

     

       
451
       
451
       
+
       
      else pkg;

     

       
452
       
452
       
+
       


     

       
441
       
453
       
 
       


     

       
442
       
454
       
 
       
  /*** deprecated stuff ***/

     

       
443
       
455