"auto" task not working when cargo not installed

There seems to be an issue with the cargo.lua module.

Basically, loading the module requires cargo being installed:

the definition of cargo.tasks calls get_cargo_subcommands();
it, in turn, creates a new Job running cargo;
Job:new(...) from plenary.nvim checks whether the command is executable and fails if it's not.

This is a problem when using auto as the target module, since this will try to load every module to call the appropriate condition(), even when cargo is not installed.

Personally, I would check this in get_cargo_subcommands as

local cmd = 'cargo'
local ok, is_exe = pcall(vim.fn.executable, cmd)
if ok and 1 ~= is_exe then
  utils.notify('Unable to find "cargo" executable', vim.log.levels.WARN)
  return {}
end

local job = Job:new({
  command = cmd,
  args = { '--list' },
  enabled_recording = true,
})
job:sync()

if job.code ~= 0 or job.signal ~= 0 then
  utils.notify('Unable to get list of available cargo subcommands', vim.log.levels.WARN)
  return {}
end

Hope this helps!

Shatur / neovim-tasks

"auto" task not working when cargo not installed #17