| // Copyright 2018 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 fs |
| |
| import ( |
| "archive/tar" |
| "fmt" |
| "io" |
| "os" |
| "path/filepath" |
| ) |
| |
| // CreateBuildContextArchive creates a tar archive of the given build context. |
| func CreateBuildContextArchive(src, dst string) error { |
| if _, err := os.Stat(dst); !os.IsNotExist(err) { |
| return fmt.Errorf("dst path already exists: %s", dst) |
| } |
| if err := os.MkdirAll(filepath.Dir(dst), 0774); err != nil { |
| return err |
| } |
| info, err := os.Stat(src) |
| if err != nil { |
| return err |
| } |
| switch { |
| case info.IsDir(): |
| return TarDir(src, dst) |
| case info.Mode().IsRegular(): |
| return TarFile(src, dst) |
| default: |
| return fmt.Errorf("input path %s is neither a directory nor a regular file", src) |
| } |
| } |
| |
| // ArchiveHasObject determines if the given tar archive contains the given object. |
| func ArchiveHasObject(archive string, path string) (bool, error) { |
| reader, err := os.Open(archive) |
| if err != nil { |
| return false, err |
| } |
| defer reader.Close() |
| tarReader := tar.NewReader(reader) |
| for { |
| hdr, err := tarReader.Next() |
| if err == io.EOF { |
| break |
| } |
| if err != nil { |
| return false, err |
| } |
| if hdr.Name == path { |
| return true, nil |
| } |
| } |
| return false, nil |
| } |