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-- gitano.log
--
-- Statement logging depending on log level etc.
--
-- Copyright 2012 Daniel Silverstone <dsilvers@digital-scurf.org>
local luxio = require "luxio"
local sio = require "luxio.simple"
local concat = table.concat
local prefix = "[gitano] "
local stream = sio.stderr
local ERRS = 0
local WARN = 1
local CHAT = 2
local INFO = 3
local DEBUG = 4
local DEEPDEBUG = 5
local level = ERRS
local function set_prefix(new_prefix)
if not new_prefix then
prefix = ""
else
if new_prefix == "true" then
new_prefix = "Gitano"
end
prefix = "[" .. tostring(new_prefix) .. "] "
end
end
local function AT(LVL, ...)
if level >= LVL then
local strs = {...}
for i = 1, #strs do
strs[i] = tostring(strs[i]) or "?"
end
stream:write(prefix .. concat(strs, " ") .. "\n")
end
end
local function state(...)
return AT(-1, ...)
end
local function stdout(...)
local savedstream, savedprefix = stream, prefix
stream, prefix = sio.stdout, ""
state(...)
stream, prefix = savedstream, savedprefix
end
local function fatal(...)
AT(ERRS, "FATAL:", ...)
stream:close()
luxio._exit(1)
end
local function critical(...)
return AT(ERRS, "CRIT:", ...)
end
local function error(...)
return AT(ERRS, "ERROR:", ...)
end
local function warning(...)
return AT(WARN, "WARNING:", ...)
end
local warn = warning
local function chat(...)
return AT(CHAT, ...)
end
local function info(...)
return AT(INFO, "INFO:", ...)
end
local function debug(...)
return AT(DEBUG, "DEBUG:", ...)
end
local function deepdebug(...)
return AT(DEEPDEBUG, "DEEPDEBUG:", ...)
end
local function set_level(l)
if type(l) ~= "number" or
l < ERRS or l > DEEPDEBUG then
level = WARN
warn("Attempted to set level to", tostring(l), "- defaulted to warnings")
end
level = l
end
local function bump_level(l)
if type(l) ~= "number" or
l < ERRS or l > DEEPDEBUG then
warn("Attempted to bump level to", tostring(l), "- left alone")
end
if level < l then level = l end
end
local function cap_level(l)
if type(l) ~= "number" or
l < ERRS or l > DEEPDEBUG then
warn("Attempted to cap level to", tostring(l), "- left alone")
end
if level > l then level = l end
end
local function get_level()
return level
end
-- Check for default log level based on environment
do
local loglevel = luxio.getenv("LC_GITANO_LOG_LEVEL") or
luxio.getenv("GITANO_LOG_LEVEL")
if loglevel then
if tonumber(loglevel) then
set_level(tonumber(loglevel))
else
loglevel = loglevel:lower()
if (loglevel == "warn" or loglevel == "warning" or
loglevel == "warnings") then
level = WARN
elseif loglevel == "chat" then
level = CHAT
elseif loglevel == "info" then
level = INFO
elseif loglevel == "debug" then
level = DEBUG
elseif (loglevel == "deepdebug" or loglevel == "ddebug" or
loglevel == "all") then
level = DEEPDEBUG
end
end
if level == nil then
level = WARN
end
end
local do_debug = luxio.getenv("LC_GITANO_DEBUG") or
luxio.getenv("GITANO_DEBUG")
if do_debug and do_debug ~= "" then
level = DEBUG
end
end
return {
level = {
ALL = ERRS,
ERRS = ERRS,
WARN = WARN,
CHAT = CHAT,
INFO = INFO,
DEBUG = DEBUG,
DDEBUG = DEEPDEBUG,
DEEPDEBUG = DEEPDEBUG,
},
set_level = set_level,
get_level = get_level,
bump_level = bump_level,
cap_level = cap_level,
state = state,
crit = critical,
critical = critical,
err = error,
error = error,
warn = warning,
warning = warning,
chat = chat,
info = info,
debug = debug,
ddebug = deepdebug,
deepdebug = deepdebug,
fatal = fatal,
stdout = stdout,
set_prefix = set_prefix,
}
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