| -- |
| -- 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. |
| -- |
| |
| local require = require |
| local pcall = pcall |
| local open = io.open |
| local popen = io.popen |
| local exit = os.exit |
| local stderr = io.stderr |
| local str_format = string.format |
| local tonumber = tonumber |
| |
| local _M = {} |
| |
| |
| -- Note: The `execute_cmd` return value will have a line break at the end, |
| -- it is recommended to use the `trim` function to handle the return value. |
| local function execute_cmd(cmd) |
| local t, err = popen(cmd) |
| if not t then |
| return nil, "failed to execute command: " |
| .. cmd .. ", error info: " .. err |
| end |
| |
| local data, err = t:read("*all") |
| t:close() |
| |
| if err ~= nil then |
| return nil, "failed to read execution result of: " |
| .. cmd .. ", error info: " .. err |
| end |
| |
| return data |
| end |
| _M.execute_cmd = execute_cmd |
| |
| |
| -- For commands which stdout would be always be empty, |
| -- forward stderr to stdout to get the error msg |
| function _M.execute_cmd_with_error(cmd) |
| return execute_cmd(cmd .. " 2>&1") |
| end |
| |
| |
| function _M.trim(s) |
| return (s:gsub("^%s*(.-)%s*$", "%1")) |
| end |
| |
| |
| function _M.split(self, sep) |
| local sep, fields = sep or ":", {} |
| local pattern = str_format("([^%s]+)", sep) |
| |
| self:gsub(pattern, function(c) fields[#fields + 1] = c end) |
| |
| return fields |
| end |
| |
| |
| function _M.read_file(file_path) |
| local file, err = open(file_path, "rb") |
| if not file then |
| return false, "failed to open file: " .. file_path .. ", error info:" .. err |
| end |
| |
| local data, err = file:read("*all") |
| if err ~= nil then |
| file:close() |
| return false, "failed to read file: " .. file_path .. ", error info:" .. err |
| end |
| |
| file:close() |
| return data |
| end |
| |
| |
| function _M.die(...) |
| stderr:write(...) |
| exit(1) |
| end |
| |
| |
| function _M.is_32bit_arch() |
| local ok, ffi = pcall(require, "ffi") |
| if ok then |
| -- LuaJIT |
| return ffi.abi("32bit") |
| end |
| |
| local ret = _M.execute_cmd("getconf LONG_BIT") |
| local bits = tonumber(ret) |
| return bits <= 32 |
| end |
| |
| |
| function _M.write_file(file_path, data) |
| local file, err = open(file_path, "w+") |
| if not file then |
| return false, "failed to open file: " |
| .. file_path |
| .. ", error info:" |
| .. err |
| end |
| |
| file:write(data) |
| file:close() |
| return true |
| end |
| |
| |
| function _M.is_file_exist(file_path) |
| local file, err = open(file_path) |
| if not file then |
| return false, "failed to open file: " |
| .. file_path |
| .. ", error info: " |
| .. err |
| end |
| |
| file:close() |
| return true |
| end |
| |
| |
| return _M |