Add syntax highlighting to the nvim-dap REPL buffer using treesitter.

Before	After

• Neovim 0.9 or later
• nvim-treesitter

Install the plugin and the requirements using your favourite method. Once installed, make sure you configured treesitter highlighting then add the following to your lua config

require('nvim-dap-repl-highlights').setup()

After initially setting up the plugin the dap_repl parser needs to be installed, this can be done manually by running :TSInstall dap_repl or by using the ensure_installed option of nvim-treesitter. NOTE: If you use the ensure_installed option you must first setup nvim-dap-repl-highlights or else the dap_repl parser won't be found, for example

require('nvim-dap-repl-highlights').setup()
require('nvim-treesitter.configs').setup {
  highlight = {
    enable = true,
  },
  ensure_installed = { 'dap_repl', ... },
  ...
}

By default, the plugin detects the language to use in the REPL by looking at the filetype used to to launch dap. Obviously in order to have syntax highlighting for certain language you will need to have a treesitter parser for that language, alongside the dap_repl parser. This may not fit all use cases.

You could instead use the command :lua require('nvim-dap-repl-highlights').setup_highlights('python') which will set python highlights in the current repl buffer. Alternatively the function can be called without specifiying the language, this will prompt the user for a language.

Additionally you could specify in the dap configuration the repl language to use, for example if you want your python repl to have javascript highlighting:

local dap = require('dap')
dap.configurations.python = {
  {
    name = "Python with javascript repl because I like to watch the world burn 🔥🔥🔥",
    type = "python",
    request = "launch",
    program = "${file}",
    repl_lang = "javascript"
  },
}

The repl_lang option takes precedence over the filetype.