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|
-- Logger for language client plugin.
local log = {}
local log_levels = vim.log.levels
--- Log level dictionary with reverse lookup as well.
---
--- Can be used to lookup the number from the name or the name from the number.
--- Levels by name: "TRACE", "DEBUG", "INFO", "WARN", "ERROR", "OFF"
--- Level numbers begin with "TRACE" at 0
--- @type table<string,integer> | table<integer, string>
--- @nodoc
log.levels = vim.deepcopy(log_levels)
-- Default log level is warn.
local current_log_level = log_levels.WARN
local log_date_format = '%F %H:%M:%S'
local function format_func(arg)
return vim.inspect(arg, { newline = ' ', indent = '' })
end
local function notify(msg, level)
if vim.in_fast_event() then
vim.schedule(function()
vim.notify(msg, level)
end)
else
vim.notify(msg, level)
end
end
local logfilename = vim.fs.joinpath(vim.fn.stdpath('log'), 'lsp.log')
-- TODO: Ideally the directory should be created in open_logfile(), right
-- before opening the log file, but open_logfile() can be called from libuv
-- callbacks, where using fn.mkdir() is not allowed.
vim.fn.mkdir(vim.fn.stdpath('log'), 'p')
--- Returns the log filename.
---@return string log filename
function log.get_filename()
return logfilename
end
--- @type file*?, string?
local logfile, openerr
--- Opens log file. Returns true if file is open, false on error
local function open_logfile()
-- Try to open file only once
if logfile then
return true
end
if openerr then
return false
end
logfile, openerr = io.open(logfilename, 'a+')
if not logfile then
local err_msg = string.format('Failed to open LSP client log file: %s', openerr)
notify(err_msg, log_levels.ERROR)
return false
end
local log_info = vim.uv.fs_stat(logfilename)
if log_info and log_info.size > 1e9 then
local warn_msg = string.format(
'LSP client log is large (%d MB): %s',
log_info.size / (1000 * 1000),
logfilename
)
notify(warn_msg)
end
-- Start message for logging
logfile:write(string.format('[START][%s] LSP logging initiated\n', os.date(log_date_format)))
return true
end
for level, levelnr in pairs(log_levels) do
-- Also export the log level on the root object.
log[level] = levelnr
-- Add a reverse lookup.
log.levels[levelnr] = level
end
--- @param level string
--- @param levelnr integer
--- @return fun(...:any): boolean?
local function create_logger(level, levelnr)
return function(...)
if levelnr < current_log_level then
return false
end
local argc = select('#', ...)
if argc == 0 then
return true
end
if not open_logfile() then
return false
end
local info = debug.getinfo(2, 'Sl')
local header = string.format(
'[%s][%s] ...%s:%s',
level,
os.date(log_date_format),
info.short_src:sub(-16),
info.currentline
)
local parts = { header }
for i = 1, argc do
local arg = select(i, ...)
table.insert(parts, arg == nil and 'nil' or format_func(arg))
end
assert(logfile)
logfile:write(table.concat(parts, '\t'), '\n')
logfile:flush()
end
end
-- If called without arguments, it will check whether the log level is
-- greater than or equal to this one. When called with arguments, it will
-- log at that level (if applicable, it is checked either way).
--- @nodoc
log.debug = create_logger('DEBUG', log_levels.DEBUG)
--- @nodoc
log.error = create_logger('ERROR', log_levels.ERROR)
--- @nodoc
log.info = create_logger('INFO', log_levels.INFO)
--- @nodoc
log.trace = create_logger('TRACE', log_levels.TRACE)
--- @nodoc
log.warn = create_logger('WARN', log_levels.WARN)
--- Sets the current log level.
---@param level (string|integer) One of `vim.lsp.log.levels`
function log.set_level(level)
if type(level) == 'string' then
current_log_level =
assert(log.levels[level:upper()], string.format('Invalid log level: %q', level))
else
assert(type(level) == 'number', 'level must be a number or string')
assert(log.levels[level], string.format('Invalid log level: %d', level))
current_log_level = level
end
end
--- Gets the current log level.
---@return integer current log level
function log.get_level()
return current_log_level
end
--- Sets formatting function used to format logs
---@param handle function function to apply to logging arguments, pass vim.inspect for multi-line formatting
function log.set_format_func(handle)
assert(handle == vim.inspect or type(handle) == 'function', 'handle must be a function')
format_func = handle
end
--- Checks whether the level is sufficient for logging.
---@param level integer log level
---@return bool : true if would log, false if not
function log.should_log(level)
return level >= current_log_level
end
return log
|
