utils.lua

o = vim.o							-- vim options
g = vim.g 							-- vim global variables
w = vim.wo							-- vim window options
b = vim.bo							-- vim buffer options
fn = vim.fn                     	-- to call Vim functions e.g. fn.bufnr()
cmd = vim.cmd                   	-- to execute Vim commands e.g. cmd('pwd')
exec = vim.api.nvim_command

local M = {} -- The module to export

-- We will create a few autogroup, this function will help to avoid
-- always writing cmd('augroup' .. group) etc..
function M.create_augroup(autocmds, name)
	cmd('augroup ' .. name)
	cmd('autocmd!')
	for _, autocmd in ipairs(autocmds) do
		cmd('autocmd ' .. table.concat(autocmd, ' '))
	end
	cmd('augroup END')
end

function M.create_higroup(highlights)
	for _, highlight in ipairs(highlights) do
		cmd('hi ' .. table.concat(highlight, ' '))
	end
end

-- Print a tables values
function M.print_table(t)
	require 'pl.pretty'.dump(t)
end

-- Merge two tables together
function M.merge_tables(a, b)
    if type(a) == 'table' and type(b) == 'table' then
        for k,v in pairs(b) do if type(v)=='table' and type(a[k] or false)=='table' then merge(a[k],v) else a[k]=v end end
    end
    return a
end

-- Map a key with optional options
function M.map(mode, keys, action, options)
	options = M.merge_tables({noremap = true}, options)
	vim.api.nvim_set_keymap(mode, keys, action, options)
end

-- Map a key to a lua callback
function M.map_lua(mode, keys, action, options)
	options = M.merge_tables({noremap = true}, options)
	vim.api.nvim_set_keymap(mode, keys, "<cmd>lua " .. action .. "<CR>", options)
end
function M.vmap_lua(keys, action, options)
	options = M.merge_tables({noremap = true}, options)
	vim.api.nvim_set_keymap("v", keys, "<cmd>'<,'>lua " .. action .. "<CR>", options)
end

-- Buffer local mappings
function M.map_buf(mode, keys, action, options, buf_nr)
	options = M.merge_tables({noremap = true}, options)
	local buf = buf_nr or 0
	vim.api.nvim_buf_set_keymap(buf, mode, keys, action, options)
end

function M.map_lua_buf(mode, keys, action, options, buf_nr)
	options = M.merge_tables({noremap = true}, options)
	local buf = buf_nr or 0
	vim.api.nvim_buf_set_keymap(buf, mode, keys, "<cmd>lua " .. action .. "<CR>", options)
end

function M.has_key(table, key)
	return table.key ~= nil
end

-- We want to be able to access utils in all our configuration files
-- so we add the module to the _G global variable.
_G.utils = M
return M -- Export the module