nix-configs/modules/home-manager/vim/init.lua

-- Global settings
vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1
vim.g.mapleader = " "

vim.opt.termguicolors = true

vim.opt.tabstop = 2
vim.opt.softtabstop = 2
vim.opt.shiftwidth = 2
vim.opt.expandtab = true

vim.opt.number = true
vim.opt.relativenumber = true
vim.opt.scrolloff = 8

vim.opt.colorcolumn = "+1,+2"
vim.opt.cursorline = true
vim.opt.signcolumn = 'yes'

vim.cmd.colorscheme "catppuccin-mocha"

-- Custom bindings for buffer navigation
vim.keymap.set("n", "<leader>n", "<cmd>bn<CR>")
vim.keymap.set("n", "<leader>p", "<cmd>bp<CR>")

vim.keymap.set("n", "<Esc>", "<cmd>nohlsearch<CR>")

-- Bufferline (tabs)
require("bufferline").setup {}

-- Lualine (status line)
require("lualine").setup {
  options = {
    section_separators = { left = '', right = '' }
  }
}

-- Telescope (anything search)
vim.keymap.set("n", "<leader>b", "<cmd>Telescope buffers<CR>")
vim.keymap.set("n", "<leader>f", "<cmd>Telescope find_files<CR>")
vim.keymap.set("n", "<leader>g", "<cmd>Telescope git_files<CR>")

-- Tree (file manager)
require("nvim-tree").setup()
vim.keymap.set("n", "<leader>t", "<cmd>NvimTreeToggle<CR>", { noremap = true, silent = true })

-- lspconfig (LSPs)
vim.lsp.enable("lua_ls")
vim.lsp.enable("nil_ls")
vim.lsp.enable("pyright")
vim.lsp.enable("rust_analyzer")

vim.keymap.set("n", "<leader>o", vim.lsp.buf.format)

vim.api.nvim_create_autocmd('LspAttach', {
  desc = 'LSP actions',
  callback = function()
    local bufmap = function(mode, lhs, rhs)
      local opts = { buffer = true }
      vim.keymap.set(mode, lhs, rhs, opts)
    end

    -- Displays hover information about the symbol under the cursor
    bufmap('n', 'K', vim.lsp.buf.hover)

    -- Jump to the definition
    bufmap('n', 'gd', vim.lsp.buf.definition)

    -- Jump to declaration
    bufmap('n', 'gD', vim.lsp.buf.declaration)

    -- Lists all the implementations for the symbol under the cursor
    bufmap('n', 'gi', vim.lsp.buf.implementation)

    -- Jumps to the definition of the type symbol
    bufmap('n', 'go', vim.lsp.buf.type_definition)

    -- Lists all the references
    bufmap('n', 'gr', vim.lsp.buf.references)

    -- Displays a function's signature information
    bufmap('n', '<C-k>', vim.lsp.buf.signature_help)

    -- Renames all references to the symbol under the cursor
    bufmap('n', '<leader>R', vim.lsp.buf.rename)

    -- Show diagnostics in a floating window
    bufmap('n', 'gl', vim.diagnostic.open_float)

    -- Move to the previous diagnostic
    bufmap('n', '[d', vim.diagnostic.goto_prev)

    -- Move to the next diagnostic
    bufmap('n', ']d', vim.diagnostic.goto_next)
  end
})