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--!The Make-like Build Utility based on Lua
--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements. See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership. The ASF licenses this file
-- to you under the Apache License, Version 2.0 (the
-- "License"); you may not use this file except in compliance
-- with the License. You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015 - 2017, TBOOX Open Source Group.
--
-- @author ruki
-- @file try.lua
--
-- load modules
local utils = require("base/utils")
local table = require("base/table")
local string = require("base/string")
local option = require("base/option")
-- define module
local sandbox_try = sandbox_try or {}
-- traceback
function sandbox_try._traceback(errors)
-- not verbose?
if not option.get("verbose") then
if errors then
-- remove the prefix info
local _, pos = errors:find(":%d+: ")
if pos then
return errors:sub(pos + 1)
end
end
return errors
end
-- init results
local results = ""
if errors then
results = errors .. "\n"
end
results = results .. "stack traceback:\n"
-- make results
local level = 2
while true do
-- get debug info
local info = debug.getinfo(level, "Sln")
-- end?
if not info or (info.name and info.name == "xpcall") then
break
end
-- function?
if info.what == "C" then
results = results .. string.format(" [C]: in function '%s'\n", info.name)
elseif info.name then
results = results .. string.format(" [%s:%d]: in function '%s'\n", info.short_src, info.currentline, info.name)
elseif info.what == "main" then
results = results .. string.format(" [%s:%d]: in main chunk\n", info.short_src, info.currentline)
break
else
results = results .. string.format(" [%s:%d]:\n", info.short_src, info.currentline)
end
-- next
level = level + 1
end
-- ok?
return results
end
-- try
function sandbox_try.try(block)
-- get the try function
local try = block[1]
assert(try)
-- get catch and finally functions
local funcs = block[2]
if funcs and block[3] then
table.join2(funcs, block[2])
end
-- try to call it
local ok, errors = xpcall(try, sandbox_try._traceback)
if not ok then
-- run the catch function
if funcs and funcs.catch then
funcs.catch(errors)
end
end
-- run the finally function
if funcs and funcs.finally then
funcs.finally(ok, errors)
end
-- ok?
return utils.ifelse(ok, errors, nil)
end
-- return module
return sandbox_try.try
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