dotfiles/.config/nvim/lua/my/functions.lua

121 lines
3.3 KiB
Lua

local M = {}
function M.map(mode, shortcut, command, description, buffer)
local opts = { noremap = true, silent = true }
opts.desc = description or nil
opts.buffer = buffer or nil
vim.keymap.set(mode, shortcut, command, opts)
end
function M.remove_trailing_whitespace()
local curpos = vim.api.nvim_win_get_cursor(0)
vim.cmd([[keeppatterns %s/\s\+$//e]])
vim.api.nvim_win_set_cursor(0, curpos)
end
vim.api.nvim_create_augroup('config_functions', { clear = true })
vim.api.nvim_create_autocmd(
{ 'BufWritePre' },
{
group = 'config_functions',
pattern = {
'*.lua', '*.cpp', '*.hpp',
'*.conf', '*.cfg', '*.ini', '*.adoc'
},
callback = M.remove_trailing_whitespace
}
)
-- Insert or update a modeline at the bottom of the buffer
function M.insert_modeline()
local comment_string = vim.o.commentstring
local space_maybe = ''
if string.match(comment_string, '%%s(.*)') ~= '' then
space_maybe = ' '
end
local fenc = vim.o.fileencoding
if fenc == '' then
fenc = 'utf-8'
end
local modeline_elements = {
' vim: set',
' fenc=' .. fenc,
' ts=' .. vim.o.tabstop,
' sw=' .. vim.o.shiftwidth,
(vim.o.expandtab and ' et' or ' noet'),
' tw=' .. vim.o.textwidth,
':',
space_maybe
}
local modeline = comment_string:gsub('%%s', table.concat(modeline_elements))
modeline = modeline:gsub(' ', ' ')
local buffer = vim.api.nvim_win_get_buf(0)
local current = vim.api.nvim_buf_get_lines(buffer, -2, -1, true)[1]
if current == modeline then
print('modeline already exists')
elseif string.match(current, 'vim:') then
vim.api.nvim_buf_set_lines(buffer, -2, -1, true, { modeline })
print('modeline updated')
else
vim.api.nvim_buf_set_lines(buffer, -1, -1, true, { '', modeline })
print('modeline inserted')
end
end
vim.api.nvim_create_user_command('ModelineInsert', M.insert_modeline, {})
-- set colorcolumn to textwidth after buffer is displayed or option is changed
function M.set_colorcolumn()
if vim.o.textwidth > 0 then
vim.opt_local.colorcolumn = { vim.o.textwidth }
else
vim.opt_local.colorcolumn = ''
end
end
vim.api.nvim_create_augroup('config_settings', { clear = true })
vim.api.nvim_create_autocmd(
{ 'BufEnter' },
{
group = 'config_settings',
callback = M.set_colorcolumn
}
)
vim.api.nvim_create_autocmd(
{ 'OptionSet' },
{
group = 'config_settings',
pattern = { 'textwidth' },
callback = M.set_colorcolumn
}
)
function M.get_project_root()
local path = vim.api.nvim_buf_get_name(0)
local root_markers = {
'.git', '.hg', '.svn', '.bzr', '_darcs',
'.projectile', '.clang-format', '.luarc.json'
}
local sep = '/'
repeat
path = path:gsub(string.format('%s[^%s]*$', sep, sep), '')
for _, marker in ipairs(root_markers) do
if io.open(path .. sep .. marker) then
return path
end
end
until path == ''
return nil
end
function M.shell_capture(command)
local handle = io.popen(command)
if not handle then return nil end
local result = handle:read() or nil
handle:close()
return result
end
return M