nix/tests/functional/fmt.sh

#!/usr/bin/env bash

source common.sh

TODO_NixOS # Provide a `shell` variable. Try not to `export` it, perhaps.

clearStoreIfPossible
rm -rf "$TEST_HOME"/.cache "$TEST_HOME"/.config "$TEST_HOME"/.local

cp ./simple.nix ./simple.builder.sh ./fmt.simple.sh ./config.nix "$TEST_HOME"

cd "$TEST_HOME"

nix fmt --help | grep "forward"

cat << EOF > flake.nix
{
  outputs = _: {
    formatter.$system =
      with import ./config.nix;
      mkDerivation {
        name = "formatter";
        buildCommand = ''
          mkdir -p \$out/bin
          echo "#! ${shell}" > \$out/bin/formatter
          cat \${./fmt.simple.sh} >> \$out/bin/formatter
          chmod +x \$out/bin/formatter
        '';
      };
  };
}
EOF
# No arguments check
[[ "$(nix fmt)" = "Formatting(0):" ]]
# Argument forwarding check
nix fmt ./file ./folder | grep 'Formatting(2): ./file ./folder'
nix flake check
nix flake show | grep -P "package 'formatter'"