Unable to update urls containing whitespace

[michaeladler]

If the url contains a url-encoded whitespace (e.g. %20), then update-nix-fetchgit fails because the call to nix-prefetch-url fails. For example, try to update this expression:

fetchurl {
  url = "https://github.com/ryanoasis/nerd-fonts/raw/v2.3.3/patched-fonts/Gohu/uni-11/complete/GohuFont%20Nerd%20Font%20Complete%20Mono.ttf";
  sha256 = "908211409b247f82a79c1554a533723914073a6d4957fd727a705f4d8d2417b9";
}

This fails with the following error:

Error: nix-prefetch-url failed with exit code 1 and error output:
error: store path '0qghqxvlib3lsqbdbdfma150pf47y37p-GohuFont%20Nerd%20Font%20Complete%20Mono.ttf' contains illegal character '%'

Indeed, nix-prefetch-url 'https://github.com/ryanoasis/nerd-fonts/raw/v2.3.3/patched-fonts/Gohu/uni-11/complete/GohuFont%20Nerd%20Font%20Complete%20Mono.ttf' produces the above error.

The solution is to specify the --name argument, e.g. this works:

nix-prefetch-url --name gohufont 'https://github.com/ryanoasis/nerd-fonts/raw/v2.3.3/patched-fonts/Gohu/uni-11/complete/GohuFont%20Nerd%20Font%20Complete%20Mono.ttf'

See NixOS/nix#6116

[michaeladler]

Just noticed this is a duplicate of #74 (although the title wasn't obvious to me)