devShellTools.unstructuredDerivationInputEnv: Match passAsFile basename

{

  lib,

  writeText,

  writeTextFile,

}:

let

  inherit (builtins) typeOf;

      (name: value:

        let str = valueToString value;

        in if lib.elem name (drvAttrs.passAsFile or [])

        then lib.nameValuePair "${name}Path" "${writeText "pass-as-text-${name}" str}"

        then

          let

            nameHash = builtins.convertHash {

              hash = "sha256:" + builtins.hashString "sha256" name;

              toHashFormat = "nix32";

            };

            basename = ".attr-${nameHash}";

          in

            lib.nameValuePair "${name}Path" "${

              writeTextFile {

                name = "shell-passAsFile-${name}";

                text = str;

                destination = "/${basename}";

              }

            }/${basename}"

        else lib.nameValuePair name str

      )

      (removeAttrs drvAttrs [

          diff $exampleBarPathString $barPath

          # TODO nice to have, as `cp $barPath foo/` preserves the basename:

          #      this is usually a mistake, so not that big a deal perhaps

          # [[ "$(basename $exampleBarPathString)" = "$(basename $barPath)" ]]

          [[ "$(basename $exampleBarPathString)" = "$(basename $barPath)" ]]

        )

        ''${args:+fail "args should not be set by Nix. We don't expect it to and unstructuredDerivationInputEnv removes it."}