my-nvim-setup/lua/utils.lua

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local M = {}
-- 1st arg as current theme, 2nd as new theme
M.change_theme = function(current_theme, new_theme)
if current_theme == nil or new_theme == nil then
print "Error: Provide current and new theme name"
return false
end
if current_theme == new_theme then
return
end
local user_config = vim.g.nvchad_user_config
local file = vim.fn.stdpath "config" .. "/lua/" .. user_config .. ".lua"
-- store in data variable
local data = assert(M.file("r", file))
-- escape characters which can be parsed as magic chars
current_theme = current_theme:gsub("%p", "%%%0")
new_theme = new_theme:gsub("%p", "%%%0")
local find = "theme = .?" .. current_theme .. ".?"
local replace = 'theme = "' .. new_theme .. '"'
local content = string.gsub(data, find, replace)
-- see if the find string exists in file
if content == data then
print("Error: Cannot change default theme with " .. new_theme .. ", edit " .. file .. " manually")
return false
else
assert(M.file("w", file, content))
end
end
M.clear_cmdline = function()
vim.defer_fn(function()
vim.cmd "echo"
end, 0)
end
M.close_buffer = function(bufexpr, force)
-- This is a modification of a NeoVim plugin from
-- Author: ojroques - Olivier Roques
-- Src: https://github.com/ojroques/nvim-bufdel
-- (Author has okayed copy-paste)
-- Options
local opts = {
next = "cycle", -- how to retrieve the next buffer
quit = false, -- exit when last buffer is deleted
--TODO make this a chadrc flag/option
}
-- ----------------
-- Helper functions
-- ----------------
-- Switch to buffer 'buf' on each window from list 'windows'
local function switch_buffer(windows, buf)
local cur_win = vim.fn.winnr()
for _, winid in ipairs(windows) do
vim.cmd(string.format("%d wincmd w", vim.fn.win_id2win(winid)))
vim.cmd(string.format("buffer %d", buf))
end
vim.cmd(string.format("%d wincmd w", cur_win)) -- return to original window
end
-- Select the first buffer with a number greater than given buffer
local function get_next_buf(buf)
local next = vim.fn.bufnr "#"
if opts.next == "alternate" and vim.fn.buflisted(next) == 1 then
return next
end
for i = 0, vim.fn.bufnr "$" - 1 do
next = (buf + i) % vim.fn.bufnr "$" + 1 -- will loop back to 1
if vim.fn.buflisted(next) == 1 then
return next
end
end
end
-- ----------------
-- End helper functions
-- ----------------
local buf = vim.fn.bufnr()
if vim.fn.buflisted(buf) == 0 then -- exit if buffer number is invalid
return
end
if #vim.fn.getbufinfo { buflisted = 1 } < 2 then
if opts.quit then
-- exit when there is only one buffer left
if force then
vim.cmd "qall!"
else
vim.cmd "confirm qall"
end
return
end
local chad_term, type = pcall(function()
return vim.api.nvim_buf_get_var(buf, "term_type")
end)
if chad_term then
-- Must be a window type
vim.cmd(string.format("setlocal nobl", buf))
vim.cmd "enew"
return
end
-- don't exit and create a new empty buffer
vim.cmd "enew"
vim.cmd "bp"
end
local next_buf = get_next_buf(buf)
local windows = vim.fn.getbufinfo(buf)[1].windows
-- force deletion of terminal buffers to avoid the prompt
if force or vim.fn.getbufvar(buf, "&buftype") == "terminal" then
local chad_term, type = pcall(function()
return vim.api.nvim_buf_get_var(buf, "term_type")
end)
-- TODO this scope is error prone, make resilient
if chad_term then
if type == "wind" then
-- hide from bufferline
vim.cmd(string.format("%d bufdo setlocal nobl", buf))
-- swtich to another buff
-- TODO switch to next bufffer, this works too
vim.cmd "BufferLineCycleNext"
else
local cur_win = vim.fn.winnr()
-- we can close this window
vim.cmd(string.format("%d wincmd c", cur_win))
return
end
else
switch_buffer(windows, next_buf)
vim.cmd(string.format("bd! %d", buf))
end
else
switch_buffer(windows, next_buf)
vim.cmd(string.format("silent! confirm bd %d", buf))
end
-- revert buffer switches if user has canceled deletion
if vim.fn.buflisted(buf) == 1 then
switch_buffer(windows, buf)
end
end
-- wrapper to use vim.api.nvim_echo
-- table of {string, highlight}
-- e.g echo({{"Hello", "Title"}, {"World"}})
M.echo = function(opts)
if opts == nil or type(opts) ~= "table" then
return
end
vim.api.nvim_echo(opts, false, {})
end
-- 1st arg - r or w
-- 2nd arg - file path
-- 3rd arg - content if 1st arg is w
-- return file data on read, nothing on write
M.file = function(mode, filepath, content)
local data
local fd = assert(vim.loop.fs_open(filepath, mode, 438))
local stat = assert(vim.loop.fs_fstat(fd))
if stat.type ~= "file" then
data = false
else
if mode == "r" then
data = assert(vim.loop.fs_read(fd, stat.size, 0))
else
assert(vim.loop.fs_write(fd, content, 0))
data = true
end
end
assert(vim.loop.fs_close(fd))
return data
end
-- return a table of available themes
M.list_themes = function(return_type)
local themes = {}
-- folder where theme files are stored
local themes_folder = vim.fn.stdpath "config" .. "/lua/themes"
-- list all the contents of the folder and filter out files with .lua extension, then append to themes table
local fd = vim.loop.fs_scandir(themes_folder)
if fd then
while true do
local name, typ = vim.loop.fs_scandir_next(fd)
if name == nil then
break
end
if typ ~= "directory" and string.find(name, ".lua") then
-- return the table values as keys if specified
if return_type == "keys_as_value" then
themes[vim.fn.fnamemodify(name, ":r")] = true
else
table.insert(themes, vim.fn.fnamemodify(name, ":r"))
end
end
end
end
return themes
end
-- Base code: https://gist.github.com/revolucas/184aec7998a6be5d2f61b984fac1d7f7
-- Changes over it: preserving table 1 contents and also update with table b, without duplicating
-- 1st arg - base table, 2nd arg - table to merge
M.merge_table = function(into, from)
-- make sure both are table
if type(into) ~= "table" or type(from) ~= "table" then
return 1
end
local stack, seen = {}, {}
local table1, table2 = into, from
while true do
for k, v in pairs(table2) do
if type(v) == "table" and type(table1[k]) == "table" then
table.insert(stack, { table1[k], table2[k] })
else
local present = seen[v] or false
if not present then
-- add the value to seen table until value is found
-- todo: maybe improve this
for _, value in pairs(table1) do
if value == v then
present = true
break
end
end
end
seen[v] = true
if not present then
-- if type is number, then it is a sub table value, so append
if type(k) == "number" then
table1[#table1 + 1] = v
else
table1[k] = v
end
end
end
end
if #stack > 0 then
local t = stack[#stack]
table1, table2 = t[1], t[2]
stack[#stack] = nil
else
break
end
end
return into
end
-- load config
-- 1st arg = boolean - whether to force reload
-- Modifies _G._NVCHAD_CONFIG global variable
M.load_config = function(reload)
-- only do the stuff below one time, otherwise just return the set config
if _G._NVCHAD_CONFIG_CONTENTS ~= nil and not (reload or false) then
return _G._NVCHAD_CONFIG_CONTENTS
end
-- don't enclose in pcall, it better break when default config is faulty
_G._NVCHAD_CONFIG_CONTENTS = require "default_config"
-- user config is not required to run nvchad but a optional
-- Make sure the config doesn't break the whole system if user config is not present or in bad state or not a table
-- print warning texts if user config file is present
local config_name = vim.g.nvchad_user_config or "chadrc"
local config_file = vim.fn.stdpath "config" .. "/lua/" .. config_name .. ".lua"
-- check if the user config is present
if vim.fn.empty(vim.fn.glob(config_file)) < 1 then
local present, config = pcall(require, config_name)
if present then
-- make sure the returned value is table
if type(config) == "table" then
-- data = require(config_name)
_G._NVCHAD_CONFIG_CONTENTS = require("utils").merge_table(_G._NVCHAD_CONFIG_CONTENTS, config)
else
print("Warning: " .. config_name .. " sourced successfully but did not return a lua table.")
end
else
print("Warning: " .. config_file .. " is present but sourcing failed.")
end
end
return _G._NVCHAD_CONFIG_CONTENTS
end
-- reload a plugin ( will try to load even if not loaded)
-- can take a string or list ( table )
-- return true or false
M.reload_plugin = function(plugins)
local status = true
local function _reload_plugin(plugin)
local loaded = package.loaded[plugin]
if loaded then
package.loaded[plugin] = nil
end
if not pcall(require, plugin) then
print("Error: Cannot load " .. plugin .. " plugin!")
status = false
end
end
if type(plugins) == "string" then
_reload_plugin(plugins)
elseif type(plugins) == "table" then
for _, plugin in ipairs(plugins) do
_reload_plugin(plugin)
end
end
return status
end
-- reload themes without restarting vim
-- if no theme name given then reload the current theme
M.reload_theme = function(theme_name)
local reload_plugin = require("utils").reload_plugin
-- if theme name is empty or nil, then reload the current theme
if theme_name == nil or theme_name == "" then
theme_name = vim.g.nvchad_theme
end
if not pcall(require, "themes/" .. theme_name) then
print("No such theme ( " .. theme_name .. " )")
return false
end
vim.g.nvchad_theme = theme_name
-- reload the base16 theme
local ok, base16 = pcall(require, "base16")
if not ok then
print "Error: Cannot load base16 plugin!"
return false
end
base16(base16.themes(theme_name), true)
if
not reload_plugin {
"highlights",
"plugins.bufferline",
"galaxyline",
"plugins.statusline",
}
then
print "Error: Not able to reload all plugins."
return false
end
-- yes, this is very hacky, but due to new_async in
-- https://github.com/glepnir/galaxyline.nvim/blob/main/lua/galaxyline/provider.lua#L5-L36
-- it doesn't work properly and some statusline stuff dissapears
local vcs = require "galaxyline.provider_vcs"
local fileinfo = require "galaxyline.provider_fileinfo"
local buffer = require "galaxyline.provider_buffer"
local extension = require "galaxyline.provider_extensions"
local whitespace = require "galaxyline.provider_whitespace"
local lspclient = require "galaxyline.provider_lsp"
_G.galaxyline_providers = {
BufferIcon = buffer.get_buffer_type_icon,
BufferNumber = buffer.get_buffer_number,
FileTypeName = buffer.get_buffer_filetype,
GitBranch = vcs.get_git_branch,
DiffAdd = vcs.diff_add,
DiffModified = vcs.diff_modified,
DiffRemove = vcs.diff_remove,
LineColumn = fileinfo.line_column,
FileFormat = fileinfo.get_file_format,
FileEncode = fileinfo.get_file_encode,
FileSize = fileinfo.get_file_size,
FileIcon = fileinfo.get_file_icon,
FileName = fileinfo.get_current_file_name,
SFileName = fileinfo.filename_in_special_buffer,
LinePercent = fileinfo.current_line_percent,
ScrollBar = extension.scrollbar_instance,
VistaPlugin = extension.vista_nearest,
WhiteSpace = whitespace.get_item,
GetLspClient = lspclient.get_lsp_client,
}
local diagnostic = require "galaxyline.provider_diagnostic"
_G.galaxyline_providers.DiagnosticError = diagnostic.get_diagnostic_error
_G.galaxyline_providers.DiagnosticWarn = diagnostic.get_diagnostic_warn
_G.galaxyline_providers.DiagnosticHint = diagnostic.get_diagnostic_hint
_G.galaxyline_providers.DiagnosticInfo = diagnostic.get_diagnostic_info
return true
end
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-- toggle between 2 themes
-- argument should be a table with 2 theme names
M.toggle_theme = function(themes)
local current_theme = vim.g.current_nvchad_theme or vim.g.nvchad_theme
for _, name in ipairs(themes) do
if name ~= current_theme then
if require("utils").reload_theme(name) then
-- open a buffer and close it to reload the statusline
vim.cmd "new|bwipeout"
vim.g.current_nvchad_theme = name
if M.change_theme(vim.g.nvchad_theme, name) then
vim.g.nvchad_theme = name
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end
end
end
end
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end
-- update nvchad
M.update_nvchad = function()
-- in all the comments below, config means user config
local config_path = vim.fn.stdpath "config"
local config_name = vim.g.nvchad_user_config or "chadrc"
local config_file = config_path .. "/lua/" .. config_name .. ".lua"
-- generate a random file name
local config_file_backup = config_path .. "/" .. config_name .. ".lua.bak." .. math.random()
local utils = require "utils"
local echo = utils.echo
local current_config = utils.load_config()
local update_url = current_config.options.update_url or "https://github.com/NvChad/NvChad"
local update_branch = current_config.options.update_branch or "main"
-- ask the user for confirmation to update because we are going to run git reset --hard
echo { { "Url: ", "Title" }, { update_url } }
echo { { "Branch: ", "Title" }, { update_branch } }
echo {
{ "\nUpdater will run", "WarningMsg" },
{ " git reset --hard " },
{
"in config folder, so changes to existing repo files except ",
"WarningMsg",
},
{ config_name },
{ " will be lost!\n\nUpdate NvChad ? [y/N]", "WarningMsg" },
}
local ans = string.lower(vim.fn.input "-> ") == "y"
utils.clear_cmdline()
if not ans then
echo { { "Update cancelled!", "Title" } }
return
end
-- first try to fetch contents of config, this will make sure it is readable and taking backup of its contents
local config_contents = utils.file("r", config_file)
-- also make a local backup in ~/.config/nvim, will be removed when config is succesfully restored
utils.file("w", config_file_backup, config_contents)
-- write original config file with its contents, will make sure charc is writable, this maybe overkill but a little precaution always helps
utils.file("w", config_file, config_contents)
-- function that will executed when git commands are done
local function update_exit(_, code)
-- restore config file irrespective of whether git commands were succesfull or not
if pcall(function()
utils.file("w", config_file, config_contents)
end) then
-- config restored succesfully, remove backup file that was created
if not pcall(os.remove, config_file_backup) then
echo { { "Warning: Failed to remove backup chadrc, remove manually.", "WarningMsg" } }
echo { { "Path: ", "WarningMsg" }, { config_file_backup } }
end
else
echo { { "Error: Restoring " .. config_name .. " failed.\n", "ErrorMsg" } }
echo { { "Backed up " .. config_name .. " path: " .. config_file_backup .. "\n\n", "None" } }
end
-- close the terminal buffer only if update was success, as in case of error, we need the error message
if code == 0 then
vim.cmd "bd!"
echo { { "NvChad succesfully updated.\n", "String" } }
else
echo { { "Error: NvChad Update failed.\n", "ErrorMsg" } }
end
end
-- git commands that will executed, reset in case config was modfied
-- use --ff-only to not mess up if the local repo is outdated
local update_script = table.concat({
"git reset --hard && git pull --set-upstream",
update_url,
update_branch,
"--ff-only",
}, " ")
-- open a new buffer
vim.cmd "new"
-- finally open the pseudo terminal buffer
vim.fn.termopen(update_script, {
-- change dir to config path so we don't need to move in script
cwd = config_path,
on_exit = update_exit,
})
end
return M