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|
------------------------
-- Hook module, creates debug hook used by LuaCov.
-- @class module
-- @name luacov.hook
local hook = {}
----------------------------------------------------------------
--- Creates a new debug hook.
-- @param runner runner module.
-- @return debug hook function that uses runner fields and functions
-- and sets `runner.data`.
function hook.new(runner)
local ignored_files = {}
local steps_after_save = 0
return function(_, line_nr, level)
-- Do not use string metamethods within the debug hook:
-- they may be absent if it's called from a sandboxed environment
-- or because of carelessly implemented monkey-patching.
level = level or 2
if not runner.initialized then
return
end
-- Get name of processed file.
local name = debug.getinfo(level, "S").source
local prefixed_name = string.match(name, "^@(.*)")
if prefixed_name then
name = prefixed_name
elseif not runner.configuration.codefromstrings then
-- Ignore Lua code loaded from raw strings by default.
return
end
local data = runner.data
local file = data[name]
if not file then
-- New or ignored file.
if ignored_files[name] then
return
elseif runner.file_included(name) then
file = {max = 0, max_hits = 0}
data[name] = file
else
ignored_files[name] = true
return
end
end
if line_nr > file.max then
file.max = line_nr
end
local hits = (file[line_nr] or 0) + 1
file[line_nr] = hits
if hits > file.max_hits then
file.max_hits = hits
end
if runner.tick then
steps_after_save = steps_after_save + 1
if steps_after_save == runner.configuration.savestepsize then
steps_after_save = 0
if not runner.paused then
runner.save_stats()
end
end
end
end
end
return hook
|
