| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package build |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "io/ioutil" |
| ) |
| |
| // PackageBlobInfo contains metadata for a single blob in a package |
| type PackageBlobInfo struct { |
| // The path of the blob relative to the output directory |
| SourcePath string `json:"source_path"` |
| |
| // The path within the package |
| Path string `json:"path"` |
| |
| // Merkle root for the blob |
| Merkle MerkleRoot `json:"merkle"` |
| |
| // Size of blob, in bytes |
| Size uint64 `json:"size"` |
| } |
| |
| // LoadBlobs attempts to read and parse a blobs manifest from the given path |
| func LoadBlobs(path string) ([]PackageBlobInfo, error) { |
| data, err := ioutil.ReadFile(path) |
| if err != nil { |
| return nil, err |
| } |
| |
| var members []PackageBlobInfo |
| |
| err = json.Unmarshal(data, &members) |
| if err != nil { |
| return nil, err |
| } |
| |
| packagePaths := make(map[string]struct{}) |
| for _, blob := range members { |
| if _, ok := packagePaths[blob.Path]; ok { |
| return nil, fmt.Errorf("%q contains more than one entry with path = %q", path, blob.Path) |
| } |
| packagePaths[blob.Path] = struct{}{} |
| } |
| |
| return members, nil |
| } |