nvim-config/init.lua

-- [[ init.lua]] 
-- [[ SPEED ]]
vim.loader.enable()

-- Fix the clipboard
vim.api.nvim_set_option('clipboard', 'unnamed')

-- Disable netrw for nvim-tree
vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1

-- LEADER
vim.g.mapleader = ','
vim.g.localleader = '\\'

-- IMPORTS
require('vars') -- Variables
require('opts') -- Options
require('keys') -- Keymaps
require('plug') -- Plugins

-- Colorscheme
vim.cmd('colorscheme everforest')
vim.cmd('hi Normal guibg=NONE') -- Have to do this manually for some reason

-- PLUGINS
require('nvim-tree').setup{
    view = {
        preserve_window_proportions = true
    }
}
require('lualine').setup {
    options = {
        theme = 'everforest'
    },
}

require('gitsigns_config')

require("mason").setup({
    ui = {
        icons = {
            package_installed = "",
            package_pending = "",
            package_uninstalled = "",
        },
    }
})
require("mason-lspconfig").setup()

-- Rust Config
local rt = require('rust-tools')

rt.setup({
    server = {
        on_attach = function(_, bufnr)
            -- Hover Actions
            vim.keymap.set('n', '<C-space>', rt.hover_actions.hover_actions, { buffer = bufnr })
            vim.keymap.set('n', '<Leader>a', rt.code_action_group.code_action_group, { buffer = bufnr })
        end,
    },
})

local sign = function(opts)
    vim.fn.sign_define(opts.name, {
        texthl = opts.name,
        text = opts.text,
        numhl = ''
    })
end

sign({name = 'DiagnosticSignError', text = ''}) 
sign({name = 'DiagnosticSignWarn', text = ''})
sign({name = 'DiagnosticSignHint', text = ''}) 
sign({name = 'DiagnosticSignInfo', text = ''})

vim.diagnostic.config({
    virtual_text = false,
    signs = true,
    update_in_insert = true,
    underline = true,
    severity_sort = false,
    float = {
        border = 'rounded',
        source = 'always',
        header = '',
        prefix = '',
    },
})

-- Completion Plugin Setup
local cmp = require('cmp')
cmp.setup({
  -- Enable LSP snippets
  snippet = {
    expand = function(args)
        vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  mapping = {
    ['<C-p>'] = cmp.mapping.select_prev_item(),
    ['<C-n>'] = cmp.mapping.select_next_item(),
    -- Add tab support
    ['<S-Tab>'] = cmp.mapping.select_prev_item(),
    ['<Tab>'] = cmp.mapping.select_next_item(),
    ['<C-S-f>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete(),
    ['<C-e>'] = cmp.mapping.close(),
    ['<CR>'] = cmp.mapping.confirm({ select = true })
  },
  -- Installed sources:
  sources = {
    { name = 'path' },                              -- file paths
    { name = 'nvim_lsp', keyword_length = 3 },      -- from language server
    { name = 'nvim_lsp_signature_help'},            -- display function signatures with current parameter emphasized
    { name = 'nvim_lua', keyword_length = 2},       -- complete neovim's Lua runtime API such vim.lsp.*
    { name = 'buffer', keyword_length = 2 },        -- source current buffer
    { name = 'vsnip', keyword_length = 2 },         -- nvim-cmp source for vim-vsnip 
    { name = 'calc'},                               -- source for math calculation
  },
  window = {
      completion = cmp.config.window.bordered(),
      documentation = cmp.config.window.bordered(),
  },
  formatting = {
      fields = {'menu', 'abbr', 'kind'},
      format = function(entry, item)
          local menu_icon ={
              nvim_lsp = 'λ',
              vsnip = '⋗',
              buffer = 'Ω',
              path = '🖫',
          }
          item.menu = menu_icon[entry.source.name]
          return item
      end,
  },
})

-- Treesitter Plugin Setup 
require('nvim-treesitter.configs').setup {
  ensure_installed = { "lua", "rust", "toml" },
  auto_install = true,
  highlight = {
    enable = true,
    additional_vim_regex_highlighting=false,
  },
  ident = { enable = true }, 
  rainbow = {
    enable = true,
    extended_mode = true,
    max_file_lines = nil,
  }
}

vim.g.barbar_auto_setup = false
require('barbar').setup({
    sidebar_filetypes = {
        NvimTree = true
    }
})

-- Hop
require('hop').setup()

-- You dont need to set any of these options. These are the default ones. Only
-- the loading is important
require('telescope').setup {
  extensions = {
    fzf = {
      fuzzy = true,                    -- false will only do exact matching
      override_generic_sorter = true,  -- override the generic sorter
      override_file_sorter = true,     -- override the file sorter
      case_mode = "smart_case",        -- or "ignore_case" or "respect_case"
                                       -- the default case_mode is "smart_case"
    }
  }
}
-- To get fzf loaded and working with telescope, you need to call
-- load_extension, somewhere after setup function:
require('telescope').load_extension('fzf')