mirror of
https://github.com/koreader/koreader
synced 2024-11-18 03:25:46 +00:00
da65ac8b02
* Iterate over varargs directly via select if possible * Use table.pack otherwise (https://github.com/koreader/koreader-base/pull/1535). * This allows us to simplify a few Logger calls, as logger now handles nil values.
98 lines
2.6 KiB
Lua
98 lines
2.6 KiB
Lua
--[[--
|
|
This module provides development-only asserts and other debug guards.
|
|
|
|
Instead of a regular Lua @{assert}(), use @{dbg.dassert}() which can be toggled at runtime.
|
|
|
|
dbg.dassert(important_variable ~= nil)
|
|
|
|
For checking whether the input given to a function is sane, you can use @{dbg.guard}().
|
|
|
|
dbg:guard(NickelConf.frontLightLevel, "set",
|
|
function(new_intensity)
|
|
assert(type(new_intensity) == "number",
|
|
"Wrong brightness value type (expected number)!")
|
|
assert(new_intensity >= 0 and new_intensity <= 100,
|
|
"Wrong brightness value given!")
|
|
end)
|
|
|
|
These functions don't do anything when debugging is turned off.
|
|
--]]--
|
|
|
|
local logger = require("logger")
|
|
|
|
local Dbg = {
|
|
-- set to nil so first debug:turnOff call won't be skipped
|
|
is_on = nil,
|
|
is_verbose = nil,
|
|
}
|
|
|
|
local Dbg_mt = {}
|
|
|
|
local LvDEBUG = logger.LvDEBUG
|
|
|
|
--- Turn on debug mode.
|
|
-- This should only be used in tests and at the user's request.
|
|
function Dbg:turnOn()
|
|
if self.is_on == true then return end
|
|
self.is_on = true
|
|
logger:setLevel(logger.levels.dbg)
|
|
|
|
Dbg_mt.__call = function(_, ...) return LvDEBUG(...) end
|
|
--- Pass a guard function to detect bad input values.
|
|
Dbg.guard = function(_, mod, method, pre_guard, post_guard)
|
|
local old_method = mod[method]
|
|
mod[method] = function(...)
|
|
if pre_guard then
|
|
pre_guard(...)
|
|
end
|
|
local values = table.pack(old_method(...))
|
|
if post_guard then
|
|
post_guard(...)
|
|
end
|
|
return unpack(values)
|
|
end
|
|
end
|
|
--- Use this instead of a regular Lua @{assert}().
|
|
Dbg.dassert = function(check, msg)
|
|
assert(check, msg)
|
|
return check
|
|
end
|
|
end
|
|
|
|
--- Turn off debug mode.
|
|
-- This should only be used in tests and at the user's request.
|
|
function Dbg:turnOff()
|
|
if self.is_on == false then return end
|
|
self.is_on = false
|
|
logger:setLevel(logger.levels.info)
|
|
Dbg_mt.__call = function() end
|
|
-- NOTE: This doesn't actually disengage previously wrapped methods!
|
|
Dbg.guard = function() end
|
|
Dbg.dassert = function(check)
|
|
return check
|
|
end
|
|
end
|
|
|
|
--- Turn on verbose mode.
|
|
-- This should only be used in tests and at the user's request.
|
|
function Dbg:setVerbose(verbose)
|
|
self.is_verbose = verbose
|
|
end
|
|
|
|
--- Simple table dump.
|
|
function Dbg:v(...)
|
|
if self.is_verbose then
|
|
return LvDEBUG(...)
|
|
end
|
|
end
|
|
|
|
--- Simple traceback.
|
|
function Dbg:traceback()
|
|
return LvDEBUG(debug.traceback())
|
|
end
|
|
|
|
setmetatable(Dbg, Dbg_mt)
|
|
|
|
Dbg:turnOff()
|
|
return Dbg
|