Nix builtins similar to cat

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1

Is there any nix builtins that returns the content of a file, similar to cat?

2

You probably want builtins.readFile which will read the contents into a string.

let
  myFileContents  = builtins.readFile ./myfile.txt;
in
...

EDIT: if your file is nix code, you could also just use import

# myFile.nix
{
  a = "some setting";
}

let
  mySetting = (import ./myFile.nix).a;
in
...
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