| // Copyright 2019 Google LLC |
| // |
| // 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. |
| |
| // Package gapicgen provides some helpers for gapicgen binaries. |
| package gapicgen |
| |
| import ( |
| "fmt" |
| "os" |
| "os/exec" |
| ) |
| |
| // VerifyAllToolsExist ensures that all required tools exist on the system. |
| func VerifyAllToolsExist(toolsNeeded []string) error { |
| for _, t := range toolsNeeded { |
| c := exec.Command("which", t) |
| c.Stdout = os.Stdout |
| c.Stderr = os.Stderr |
| if c.Run() != nil { |
| return fmt.Errorf("%s does not appear to be installed. please install it. all tools needed: %v", t, toolsNeeded) |
| } |
| } |
| return nil |
| } |