| // Copyright Istio Authors |
| // |
| // 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 envoy |
| |
| import ( |
| "fmt" |
| "os" |
| "path/filepath" |
| "regexp" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/test" |
| "github.com/apache/dubbo-go-pixiu/pkg/test/env" |
| ) |
| |
| var envoyFileNamePattern = regexp.MustCompile("^envoy$|^envoy-[a-f0-9]+$|^envoy-debug-[a-f0-9]+$") |
| |
| // FindBinary searches for an Envoy debug binary under TARGET_OUT. If the TARGET_OUT environment variable |
| // is not set, the default location under GOPATH is assumed. If TARGET_OUT contains multiple debug binaries, |
| // the most recent file is used. |
| func FindBinary() (string, error) { |
| binPaths, err := findBinaries() |
| if err != nil { |
| return "", err |
| } |
| |
| if len(binPaths) == 0 { |
| return "", fmt.Errorf("unable to locate an Envoy binary under dir %s", env.IstioOut) |
| } |
| |
| latestBinPath, err := findMostRecentFile(binPaths) |
| if err != nil { |
| return "", err |
| } |
| |
| return latestBinPath, nil |
| } |
| |
| // FindBinaryOrFail calls FindBinary and fails the given test if an error occurs. |
| func FindBinaryOrFail(t test.Failer) string { |
| p, err := FindBinary() |
| if err != nil { |
| t.Fatal(err) |
| } |
| return p |
| } |
| |
| func findBinaries() ([]string, error) { |
| binPaths := make([]string, 0) |
| err := filepath.Walk(env.LocalOut, func(path string, f os.FileInfo, err error) error { |
| if err != nil { |
| return err |
| } |
| if !f.IsDir() && envoyFileNamePattern.MatchString(f.Name()) { |
| binPaths = append(binPaths, path) |
| } |
| return nil |
| }) |
| if err != nil { |
| return nil, err |
| } |
| return binPaths, nil |
| } |
| |
| func findMostRecentFile(filePaths []string) (string, error) { |
| latestFilePath := "" |
| latestFileTime := int64(0) |
| for _, filePath := range filePaths { |
| fileInfo, err := os.Stat(filePath) |
| if err != nil { |
| // Should never happen |
| return "", err |
| } |
| fileTime := fileInfo.ModTime().Unix() |
| if fileTime > latestFileTime { |
| latestFileTime = fileTime |
| latestFilePath = filePath |
| } |
| } |
| return latestFilePath, nil |
| } |