65 lines
1.9 KiB
Lua
65 lines
1.9 KiB
Lua
---
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-- Logging facilities.
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local utils = require('util.utils')
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local M = {}
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local logLevel, logVerbose, logStream
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--- Available log levels
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-- @table LEVEL
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M.LEVEL = {
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'debug', -- for debug messages
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'info', -- for informational messages
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'warn', -- for warnings (something is wrong/fishy but not neccesarily problematic)
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'error', -- for recoverable errors
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'fatal' -- for unrecoverable errors
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}
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-- M.LEVEL already has idx=>name entries, now create name=>idx entries
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for i,v in ipairs(M.LEVEL) do
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M.LEVEL[v] = i
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end
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local function log(level, msg, verbose)
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if level >= logLevel then
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local now = os.date('%m-%d %H:%M:%S')
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local i = debug.getinfo(3) --the stack frame just above the logger call
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local v = verbose
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if v == nil then v = logVerbose end
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local name = i.name or "(nil)"
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local vVal = 'nil'
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local m = (type(msg) == 'string') and msg or utils.dump(msg)
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if v then logStream:write(now .. " (" .. M.LEVEL[level] .. ") " .. m .. " [" .. name .. "@" .. i.short_src .. ":" .. i.linedefined .. "]\n")
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else logStream:write(now .. " (" .. M.LEVEL[level] .. ") " .. m .. "\n") end
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logStream:flush()
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end
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end
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--- Initializes the logger.
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-- @tparam @{util.logger.LEVEL} level Minimum level of messages to log.
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-- @tparam bool verbose Write verbose log messages (include file/line inforomation).
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function M:init(level, verbose)
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logLevel = level or M.LEVEL.warn
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logVerbose = verbose or false
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logStream = stream or io.stdout
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end
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-- pass nil as stream to reset to stdout
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function M:setStream(stream)
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logStream = stream or io.stdout
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end
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function M:debug(msg, verbose) log(M.LEVEL.debug, msg, verbose); return true end
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function M:info(msg, verbose) log(M.LEVEL.info, msg, verbose); return true end
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function M:warn(msg, verbose) log(M.LEVEL.warn, msg, verbose); return true end
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function M:error(msg, verbose) log(M.LEVEL.error, msg, verbose); return false end
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function M:fatal(msg, verbose) log(M.LEVEL.fatal, msg, verbose); return false end
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return M
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