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--!A cross-platform build utility based on Lua
--
-- Licensed 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-present, Xmake Open Source Community.
--
-- @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)
-- no diagnosis info?
if not option.get("diagnosis") then
if errors then
-- remove the prefix info
local _, pos = errors:find(":%d+: ")
if pos then
errors = errors:sub(pos + 1)
end
end
return errors
end
-- traceback exists?
if errors and errors:find("stack traceback:", 1, true) then
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
level = level + 1
end
return results
end
-- local ok = try
-- {
-- function ()
-- raise("errors")
-- raise({errors = "xxx", xxx = "", yyy = ""})
-- return true
-- end,
-- catch
-- {
-- function (errors)
-- print(errors)
-- if errors then
-- print(errors.xxx)
-- end
-- end
-- },
-- finally
-- {
-- function (ok, result_or_errors)
-- end
-- }
-- }
function sandbox_try.try(block)
-- get the try function
local try = block[1]
assert(try)
-- get catch and finally functions
local funcs = table.join(block[2] or {}, block[3] or {})
-- try to call it
local results = table.pack(utils.trycall(try, sandbox_try._traceback))
local ok = results[1]
if not ok then
-- run the catch function
if funcs and funcs.catch then
funcs.catch(results[2])
end
end
-- run the finally function
if funcs and funcs.finally then
funcs.finally(ok, table.unpack(results, 2, results.n))
end
if ok then
return table.unpack(results, 2, results.n)
end
end
-- return module
return sandbox_try.try
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