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impure.nix: stringify path from NIX_PATH #39970

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merged 1 commit into from May 4, 2018
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yorickvP
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@yorickvP yorickvP commented May 4, 2018

If impure.nix gets the path from NIX_PATH, the type is path, and path+"/." is a no-op. Stringify it first so isDir will return false if it's not, in fact, a dir. This way, single files can be specified with nixpkgs-overlays in the NIX_PATH.

Motivation for this change
Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Fits CONTRIBUTING.md.

If impure.nix gets the path from NIX_PATH, the type is `path`, and `path+"/."` is a no-op. Stringify it first so `isDir` will return false if it's not, in fact, a dir. This way, single files can be specified with nixpkgs-overlays in the NIX_PATH.
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@Ericson2314 Ericson2314 left a comment

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Oh our crazy path vs string stuff. Nice sleuthing :).

@Ericson2314 Ericson2314 merged commit 9c86ccb into NixOS:master May 4, 2018
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