tests/plugins: refactor (#235)

lib/check.nix

@@ -1,35 +0,0 @@
-{pkgs, ...}: {
-  checkNvim = {
-    name,
-    nvim,
-    dontRun,
-    ...
-  }:
-    pkgs.stdenv.mkDerivation {
-      name = name;
-
-      nativeBuildInputs = [nvim pkgs.docker-client];
-
-      dontUnpack = true;
-      # We need to set HOME because neovim will try to create some files
-      #
-      # Because neovim does not return an exitcode when quitting we need to check if there are
-      # errors on stderr
-      buildPhase =
-        if !dontRun
-        then ''
-          output=$(HOME=$(realpath .) nvim -mn --headless "+q" 2>&1 >/dev/null)
-          if [[ -n $output ]]; then
-          	echo "ERROR: $output"
-            exit 1
-          fi
-        ''
-        else ''
-        '';
-
-      # If we don't do this nix is not happy
-      installPhase = ''
-        mkdir $out
-      '';
-    };
-}