dotfiles/nix/base-system/init.lua

-- theming
-- Default options
vim.opt.termguicolors = true
vim.cmd.colorscheme 'duskfox'

-- turn on relative line numbers
vim.opt.relativenumber = true
vim.opt.number = true
vim.o.expandtab = false
vim.o.paste = false
vim.o.autoindent = true
vim.o.linebreak = true
vim.o.mouse = false
vim.o.tabstop = 4

vim.cmd("noswapfile")
vim.cmd("syntax on")
vim.cmd("filetype plugin on")

vim.cmd([[
au BufNewFile,BufRead *Makefile,*.mk set noexpandtab
]])

vim.cmd([[
au BufNewFile,BufRead *.py,*.java set tabstop=2
]])

vim.cmd([[
au BufNewFile,BufRead *.app set filetype=erlang
]])

vim.cmd([[
au BufNewFile,BufRead .bash_* set filetype=sh
]])

vim.cmd([[
au BufNewFile,BufRead *.sil set filetype=tex
]])

vim.cmd([[
au BufNewFile,BufRead *.erl filetype indent off
]])

vim.cmd([[
au BufNewFile,BufRead *.hrl filetype indent off
]])

--https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md

local lspconfig = require("lspconfig")
-- Nix language server support
lspconfig.nil_ls.setup{{
}}

local vim_pid = vim.fn.getpid()

-- "FormatterOptions:EnableEditorConfigSupport=true" 
local omnisharp_cmd = { tostring(vim.env.OMNISHARP_BIN), '--languageserver', '--hostPID',  tostring(vim_pid), }
-- This needs a path to the omnisharp dll provided. We depend on the OMNISHARP_BIN environment variable being set to make this work.
lspconfig.omnisharp.setup {
    cmd = omnisharp_cmd,
    enable_roslyn_analyzers = true,
    enable_editorconfig_support = true,
    enable_import_completion = true,
    -- Omnisharp has issues with the semanticTokens feature. disable it for this language server.
    on_attach = function(client, bufnr)
        client.server_capabilities.semanticTokensProvider = nil
    end,
	-- TODO(jwall): See if init_options can assist in getting our lint setting correct.
}

--ocaml
lspconfig.ocamllsp.setup{}

-- Java language server support
lspconfig.java_language_server.setup{}

-- Typescript language server support
lspconfig.tsserver.setup{}

-- Rust language server support
lspconfig.rust_analyzer.setup{}

-- lua language server setup.
lspconfig.lua_ls.setup{}

-- lsp configuration
vim.api.nvim_create_autocmd('LspAttach', {
  callback = function(args)
  	local opts = { buffer = args.buf }
    vim.keymap.set("n", '<C-Space>', function()
		vim.lsp.buf.hover()
	end, opts)
    vim.keymap.set({"n", "v"}, "<Leader>a", vim.lsp.buf.code_action, opts)
    vim.keymap.set("n", "gr", vim.lsp.buf.references, opts)
    vim.keymap.set("n", "gd", vim.lsp.buf.definition, opts)
    vim.keymap.set("n", "<Leader>f", vim.lsp.buf.format, opts)
    -- We use F2 to rename things
    vim.keymap.set("n", "<F2>", vim.lsp.buf.rename, opts)
  end,
})

-- LSP Diagnostics Options Setup 
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 = '',
    },
})

vim.cmd([[
set signcolumn=yes
autocmd CursorHold * lua vim.diagnostic.open_float(nil, { focusable = false })
]])

vim.cmd([[
let g:coq_settings = { 'auto_start': 'shut-up', 'display.icons.mode': "none" }
]])

require("coq")

--Set completeopt to have a better completion experience
-- :help completeopt
-- menuone: popup even when there's only one match
-- noinsert: Do not insert text until a selection is made
-- noselect: Do not select, force to select one from the menu
-- shortness: avoid showing extra messages when using completion
-- updatetime: set updatetime for CursorHold
vim.opt.completeopt = {'menuone', 'noselect', 'noinsert'}
vim.opt.shortmess = vim.opt.shortmess + { c = true}
vim.api.nvim_set_option('updatetime', 300) 

-- Fixed column for diagnostics to appear
-- Show autodiagnostic popup on cursor hover_range
-- Goto previous / next diagnostic warning / error 
-- Show inlay_hints more frequently 
vim.cmd([[
set signcolumn=yes
autocmd CursorHold * lua vim.diagnostic.open_float(nil, { focusable = false })
]])

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

vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1

-- set termguicolors to enable highlight groups
vim.opt.termguicolors = true

-- setup nvim-tree
require("nvim-tree").setup{
    hijack_unnamed_buffer_when_opening = true,
    update_focused_file = {
        enable = true,
    },
    renderer = {
         icons = {
            show = {
                file = false,
            },
            glyphs = {
              default = "-",
              symlink = "S",
              bookmark = "🎗",
              modified = "●",
              folder = {
                arrow_closed = "→",
                arrow_open = "↓",
                default = "📁",
                open = "📂",
                empty = "📁",
                empty_open = "📂",
                symlink = "S",
                symlink_open = "S",
              },
              git = {
                unstaged = "✗",
                staged = "✓",
                unmerged = "∦",
                renamed = "➜",
                untracked = "★",
                deleted = "X",
                ignored = "◌",
              },
            },
         },
    }, 
    diagnostics = {
        enable = true,
        show_on_dirs = true,
        icons = {
            hint = "➡️",
            info = "🗒️",
            warning = "⚠️",
            error = "🔥",
        },
    },
}

require('trouble').setup{
    icons = false,
    signs = {
        hint = "➡️",
        information = "🗒️",
        warning = "⚠️",
        error = "🔥",
        other = "?",
    },
}

vim.keymap.set("n", "<C-p>", function()
    require("nvim-tree.api").tree.toggle()
end)

vim.keymap.set("n", "<Leader>tc", function()
    vim.cmd("tabclose")
end)

vim.keymap.set("n", "<Leader>tn", function()
    vim.cmd("tabnew")
end)

vim.keymap.set("n", "<Leader>tk", function()
    vim.cmd("tabnext")
end)

vim.keymap.set("n", "<Leader>tj", function()
    vim.cmd("tabprev")
end)

vim.keymap.set("n", "<Leader>ts", function()
    vim.cmd("tabs")
end)

vim.keymap.set("n", "<Leader>mg", function()
    vim.cmd("MagitOnly")
end)

-- Telelscope configuration
local telescope = require('telescope')
local telescope_builtins = require('telescope.builtin')
local telescope_actions = require('telescope.actions')

-- https://github.com/nvim-telescope/telescope.nvim 
telescope.setup({
	defaults = {
		initial_mode = "normal",
	},
})

vim.keymap.set("n", "<Leader>nff", telescope_builtins.fd)
vim.keymap.set("n", "<Leader>rl", telescope_builtins.lsp_references)
vim.keymap.set("n", "<Leader>rn", vim.lsp.buf.rename)
vim.keymap.set("n", "<Leader>sl", telescope_builtins.lsp_workspace_symbols)
vim.keymap.set("n", "<Leader>dl", telescope_builtins.diagnostics)
vim.keymap.set("n", "<Leader>bl", function() telescope_builtins.buffers({}) end)

-- Show whatever errors we have in our trouble pane
vim.keymap.set("n", "<Leader>se", "<cmd>TroubleToggle<cr>", { silent = true, noremap = true })