[!WARNING]
I'm not sure about the name yet, it might change in the near future.

Chime.nvim 🚦

Chime is a very little diagnostic handler that echoes the diagnostics of the current line to the echo / message area.

Chime is very configurable and aims to be as Neovim native as possible.

Installation

To install, use your favorite plugin manager. For example with lazy.nvim:

{ 'yochem/chime.nvim' }

For lazy-loading you could try event = 'DiagnosticsChanged', although the plugin should be very light.

Configuration

This plugin aims to do everything the Neovim way. Because it handles diagnostics, it's an diagnostic-handler. This means configuration is handled using vim.diagnostic.config(), not setup(). It also listens to global configuration options for diagnostic handlers, and you can enable it only for certain namespaces. See vim.diagnostic.config) for more info.

vim.diagnostic.config({
  chime = {
    severity_sort = false,
    severity = nil,
    format = ...,
  }
})

Chime can be enabled or disabled on the fly:

" disable Chime
:lua vim.diagnostic.config({ chime = false })
" and enable again
:lua vim.diagnostic.config({ chime = true })

Format

Set the format of the diagnostic message with the format config option. It should be a function that receives a diagnostic and outputs either a string or a list of colored chunks (like the first argument of vim.api.nvim_echo())).

An example that returns the formatted string [INFO] Unused functions. (luals):

vim.diagnostic.config({
  chime = {
    format = function(diagnostic)
      return ('[%s] %s (%s)'):format(
        -- this assumes the default sign text
        vim.diagnostic.severity[diagnostic.severity],
        diagnostic.message,
        diagnostic.source,
      )
    end
  }
})

And the same diagnostic but with the sign text highlighted in its color and the source in gray:

vim.diagnostic.config({
  chime = {
    format = function(diagnostic)
      local severity_text = vim.diagnostic.severity[diagnostic.severity]
      local severity_color = ({
          'DiagnosticError',
          'DiagnosticWarn',
          'DiagnosticInfo',
          'DiagnosticHint',
      })[diagnostic.severity]

      return {
        { ('[%s] '):format(severity_text), severity_color },
        -- prevent "Press enter" prompts by only showing first line
        { vim.split(diagnostic.message, '\n')[1] },
        { (' (%s)'):format(diagnostic.source), "Comment" },
      }
    end
  }
})

Severity

Filter on severities, for example only show errors in Chime. See diagnostic-severity.

Severity Sort

Sort by severity. It is recommended to set this to true. See vim.diagnostic.Opts.

Manually Show Diagnostics

May you wish to only manually show the diagnostics, disable the handler and map the show() method yourself.

vim.diagnostic.config({ chime = false })

vim.keymap.set('n', '<leader>d', function()
  require('chime').show()
end)

Comparison

The main functionality of this plugin is inspired by seblyng/nvim-ech-diagnostics, which I have used with pleasure for some years. This plugin aims to have the same functionality as nvim-echo-diagnostics, but in a more modern Neovim way (by being a diagnostic handler). I figured this was to much of a breaking change to upstream to nvim-echo-diagnostics, so here we are.

TODO

• Add option to always trim messages to fit screen. Kill "Press ENTER" with

• Better default format.
• Resize cmdheight temporary to allow multiple diagnostics at once, without

• Fix update_in_insert
• checkhealth support