| // Licensed to 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. Apache Software Foundation (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. |
| // |
| |
| package util |
| |
| import ( |
| "bytes" |
| "errors" |
| "io/ioutil" |
| "os" |
| "os/exec" |
| ) |
| |
| // Which checks if binary is present in PATH. |
| func Which(binary string) error { |
| _, err := exec.LookPath(binary) |
| |
| return err |
| } |
| |
| // PathExist checks if a file/directory is exist. |
| func PathExist(_path string) bool { |
| _, err := os.Stat(_path) |
| if err != nil && os.IsNotExist(err) { |
| return false |
| } |
| return true |
| } |
| |
| // ReadFileContent reads the file content. |
| func ReadFileContent(filename string) (string, error) { |
| if PathExist(filename) { |
| content, err := ioutil.ReadFile(filename) |
| if err != nil { |
| return "", err |
| } |
| return string(content), nil |
| } |
| return "", errors.New("the file does not exist") |
| } |
| |
| // ExecuteCommand executes the given command and returns the result. |
| func ExecuteCommand(cmd string) (string, error) { |
| command := exec.Command("bash", "-c", cmd) |
| outinfo := bytes.Buffer{} |
| command.Stdout = &outinfo |
| |
| if err := command.Start(); err != nil { |
| return "", err |
| } |
| if err := command.Wait(); err != nil { |
| return "", err |
| } |
| return outinfo.String(), nil |
| } |