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Undefined global vim

Defining vim as global outside of Neovim

When developing plugins for Neovim, particularly in Lua, developers often encounter the "Undefined global vim" warning. This warning can be a nuisance and disrupt the development workflow. However, there is a straightforward solution to this problem by configuring the Lua Language Server Protocol (LSP) to recognize 'vim' as a global variable.

Getting "Undefined global vim" warning when developing Neovim plugin

While developing Neovim plugins using Lua, the Lua language server might not recognize the 'vim' namespace by default. This leads to warnings about 'vim' being an undefined global variable. These warnings are not just annoying but can also clutter the development environment with unnecessary alerts, potentially hiding other important warnings or errors.

Defining vim as global in Lua LSP configuration to get rid of the warning

To resolve the "Undefined global vim" warning, you can explicitly define 'vim' as a global variable within your Lua LSP configuration. This is done by modifying the settings of the Lua language server to include 'vim' in the list of recognized globals. Here’s how you can adjust your Lua LSP configuration:

require'lspconfig'.lua_ls.setup{
  settings = {
    Lua = {
      diagnostics = {
        globals = {'vim'},  -- Recognize 'vim' as a global variable
      },
    },
  },
}

This configuration snippet tells the Lua language server to treat 'vim' as a global variable, thus eliminating the warning. By adding 'vim' to the diagnostics globals in the Lua settings, the language server no longer flags 'vim' as undefined, which smoothens the development experience.

In conclusion, by making a small tweak to the Lua LSP settings, developers can enhance their plugin development experience in Neovim by eliminating unnecessary warnings and focusing more on the actual code logic and functionality.

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