perlPath should be executed at the repository root

[delphinus]

I'm using carmel to manage Perl modules and execute the app. carmel command needs to be executed at the repository root, more precisely, the directory that has .carmel/MySetup.pm file.

# perl -c will fail not at the repository root
$ cd $HOME
$ carmel exec perl -Ilib -c /path/to/lib/MyApp.pm
Can't locate .carmel/MySetup.pm in '.'. You need to run `carmel install` first.

# move to the repository root, then perl -c works successfully
$ cd /path/to
$ ls .carmel/
MySetup.pm
$ carmel exec perl -Ilib -c lib/MyApp.pm 
lib/MyApp.pm syntax OK

When perlnavigator launches external processes for diagnostics, searching modules, and so on, it does not set cwd for them. So all features will fail when the editor has been launched not at the repository root. Can we use the repository root as cwd in launching processes?

$ cd $HOME
$ nvim /path/to/lib/MyApp.pm
# -> No diagnostics warnings are shown.

$ cd /path/to
$ nvim lib/MyAPp.pm
# -> Diagnostics are shown.

FYI: my perlnavigator settings in Neovim

{
  cmd = { "perlnavigator" },
  filetypes = { "perl" },
  name = "perlnavigator",
  root_markers = { ".git" },
  settings = {
    perlnavigator = {
      includePaths = { "./lib", "./local/lib/perl5", "./t/lib" },
      perlEnv = {},
      perlParams = { "exec", "perl" },
      perlPath = "carmel"
    }
  }
}