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local M = {}
local stats = require("luacov.stats")
local data = stats.load()
local statsfile = stats.start()
M.statsfile = statsfile
local tick = package.loaded["luacov.tick"]
local ctr = 0
local luacovlock = os.tmpname()
local booting = true
local skip = {}
M.skip = skip
local function on_line(_, line_nr)
if tick then
ctr = ctr + 1
if ctr == 100 then
ctr = 0
stats.save(data, statsfile)
end
end
-- get name of processed file; ignore Lua code loaded from raw strings
local name = debug.getinfo(2, "S").source
if not name:match("^@") then
return
end
name = name:sub(2)
-- skip 'luacov.lua' in coverage report
if booting then
skip[name] = true
booting = false
end
if skip[name] then
return
end
local file = data[name]
if not file then
file = {max=0}
data[name] = file
end
if line_nr > file.max then
file.max = line_nr
end
file[line_nr] = (file[line_nr] or 0) + 1
end
local function on_exit()
os.remove(luacovlock)
stats.save(data, statsfile)
stats.stop(statsfile)
end
local function init()
if not tick then
M.on_exit_trick = io.open(luacovlock, "w")
debug.setmetatable(M.on_exit_trick, { __gc = on_exit } )
end
debug.sethook(on_line, "l")
local rawcoroutinecreate = coroutine.create
coroutine.create = function(...)
local co = rawcoroutinecreate(...)
debug.sethook(co, on_line, "l")
return co
end
coroutine.wrap = function(...)
local co = rawcoroutinecreate(...)
debug.sethook(co, on_line, "l")
return function()
local r = { coroutine.resume(co) }
if not r[1] then
error(r[2])
end
return unpack(r, 2)
end
end
local rawexit = os.exit
os.exit = function(...)
on_exit()
rawexit(...)
end
end
init()
return M
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