overlays/lib/filesystem.nix

   1 self: super:
   2 let lib = super.lib; in
   3 {
   4   lib = (super.lib or {}) // {
   5     findFiles = pattern:
   6       with builtins;
   7       let go = curr:
   8         let dir = readDir curr; in
   9         let files = lib.filterAttrs (name: type:
  10           type == "regular" &&
  11           match pattern name != null) dir; in
  12         let dirs = lib.filterAttrs (name: type: type == "directory") dir; in
  13         map (name: "${curr}/${name}") (attrNames files) ++
  14         lib.concatMap (name: go "${curr}/${name}") (attrNames dirs)
  15         ;
  16       in root: go (toPath root);
  17   };
  18 }