nix-helpers: 39b83c775938dc9bbce955936145b7c685fdd83c

     1: { die, hello, lib, nothing }:
     2: 
     3: with builtins;
     4: with lib;
     5: with import ./util.nix { };
     6: with rec {
     7:   stillNeeded = typeOf (toPath ./.) == "string";
     8:   obsoleteWarn = x:
     9:     if stillNeeded then
    10:       x
    11:     else
    12:       trace "WARNING: toPath makes paths, is asPath now redundant?" x;
    13: 
    14:   # We must discard any existing context, to prevent the Nix error message
    15:   # "a string that refers to a store path cannot be appended to a path". Note
    16:   # that it's safe to do this, because a new context will be created when the
    17:   # resulting path gets converted to a string (e.g. as a derivation attribute).
    18:   go = path:
    19:     if typeOf path == "path" then
    20:       path
    21:     else
    22:       rootPath + (unsafeDiscardStringContext "${path}");
    23: };
    24: 
    25: obsoleteWarn go