Neovim Rust

This plugin has been deprecated in favor of neovim-tasks. I realized that having separate plugins for each build system is inconvenient, so I decided to write a general purpose plugin that could support support any build system.

A Neovim 0.7+ plugin that to provides integration with building, running and debugging projects with output to quickfix.

Dependencies

• plenary.nvim for internal helpers.
• nvim-dap for debugging.

Commands

Use the command :Rust with one of the following arguments:

Argument	Description
cargo {subcommand} ...	Run the specific cargo subcommand (run, for example) and print output to quickfix. All additional arguments will be forwared to the command. See cargo --list for the list of available subcommands.
debug {subcommand} ...	Run debugger on specific cargo subcommand. All additional arguments will be forwared to the command. Can be used only with run or test. Uses the same persistent arguments as the corresponding subcommand.
set_args {subcommand} ...	Set persistent arguments for the specified subcommand for cargo or globally (using global as subcommand). When running commands arguments composed in the following order: global, specific to the subcommand being run and then additional temporary arguments that was passed to the command.
cancel	Cancel current running Cargo subcommand like build or run.

Also the corresponding Lua functions with the same names as the arguments are available from require('rust').

Simple usage example

1. Create a new project (:Rust cargo new my_project) or open folder with an existing.
2. Optionally set arguments for subcommands (for example, use :Rust set_args global to set arguments for all subcommands or :Rust set_args run to set arguments for cargo run).
3. Run any cargo subcommand (for example, :Rust cargo run or :Rust cargo test) or debug it (for example, :Rust debug run or :Rust debug test). You can pass additional arguments to these commands, which will be temporarily added to the arguments from 2.

Configuration

To configure the plugin, you can call require('rust').setup(values), where values is a dictionary with the parameters you want to override. Here are the defaults:

local Path = require('plenary.path')
require('rust').setup({
  parameters_file = 'neovim.json', -- JSON file to store information about selected target, run arguments and build type.
  default_parameters = { args = { global = {} } }, -- The default values in `parameters_file`.
  save_before_build = true, -- Save all buffers before building.
  on_build_output = nil, -- Callback that will be called each time data is received by the current process. Accepts the received data as an argument.
  quickfix = {
    pos = 'botright', -- Where to open quickfix
    height = 10, -- Height of the opened quickfix.
    only_on_error = false, -- Open quickfix window only if target build failed.
  },
  dap_configuration = { type = 'lldb', request = 'launch' }, -- DAP configuration. By default configured to work with `lldb-vscode`.
  dap_open_command = require('dap').repl.open, -- Command to run after starting DAP session. You can set it to `false` if you don't want to open anything or `require('dapui').open` if you are using https://github.com/rcarriga/nvim-dap-ui
})

The mentioned parameters_file will be created for every project with the following content:

{
  "args": {"run": ["arg1", "arg2"]} // A dictionary with subcommand names and their arguments specified as an array.
}

Usually you don't need to edit it manually, you can set its values using the :Rust set_args <subcommand> commands.

CodeLLDB DAP configuration example

require('rust').setup({
  dap_configuration = {
    type = 'codelldb',
    request = 'launch',
    stopOnEntry = false,
    runInTerminal = false,
  }
})

Advanced usage examples

progress = ""  -- can be displayed in statusline, updated in on_build_output

require('rust').setup({
  quickfix = {
    only_on_error = true,
  },
  on_build_output = function(lines)
    -- Get only last line
    local match = string.match(lines[#lines], "(%[.*%])")
    if match then
      progress = string.gsub(match, "%%", "%%%%")
    end
  end
})

Additionally all rust module functions that runs something return Plenary.job, so one can also set on_exit callbacks:

function rust_build()
  local job = require('rust').build()
  if job then
    job:after(vim.schedule_wrap(
      function(_, exit_code)
        if exit_code == 0 then
          vim.notify("Target was built successfully", vim.log.levels.INFO, { title = 'Rust' })
        else
          vim.notify("Target build failed", vim.log.levels.ERROR, { title = 'Rust' })
        end
      end
    ))
  end
end