github.com/dtroyer-salad/og2/v2@v2.0.0-20240412154159-c47231610877/example_pack_test.go (about) 1 /* 2 Copyright The ORAS Authors. 3 Licensed under the Apache License, Version 2.0 (the "License"); 4 you may not use this file except in compliance with the License. 5 You may obtain a copy of the License at 6 7 http://www.apache.org/licenses/LICENSE-2.0 8 9 Unless required by applicable law or agreed to in writing, software 10 distributed under the License is distributed on an "AS IS" BASIS, 11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 See the License for the specific language governing permissions and 13 limitations under the License. 14 */ 15 16 package oras_test 17 18 import ( 19 "context" 20 "fmt" 21 22 ocispec "github.com/opencontainers/image-spec/specs-go/v1" 23 "oras.land/oras-go/v2" 24 "oras.land/oras-go/v2/content" 25 "oras.land/oras-go/v2/content/memory" 26 ) 27 28 // ExampleImageV11 demonstrates packing an OCI Image Manifest as defined in 29 // image-spec v1.1.0. 30 func ExamplePackManifest_imageV11() { 31 // 0. Create a storage 32 store := memory.New() 33 34 // 1. Set optional parameters 35 opts := oras.PackManifestOptions{ 36 ManifestAnnotations: map[string]string{ 37 // this timestamp will be automatically generated if not specified 38 // use a fixed value here in order to test the output 39 ocispec.AnnotationCreated: "2000-01-01T00:00:00Z", 40 }, 41 } 42 ctx := context.Background() 43 44 // 2. Pack a manifest 45 artifactType := "application/vnd.example+type" 46 manifestDesc, err := oras.PackManifest(ctx, store, oras.PackManifestVersion1_1, artifactType, opts) 47 if err != nil { 48 panic(err) 49 } 50 fmt.Println("Manifest descriptor:", manifestDesc) 51 52 // 3. Verify the packed manifest 53 manifestData, err := content.FetchAll(ctx, store, manifestDesc) 54 if err != nil { 55 panic(err) 56 } 57 fmt.Println("Manifest content:", string(manifestData)) 58 59 // Output: 60 // Manifest descriptor: {application/vnd.oci.image.manifest.v1+json sha256:c259a195a48d8029d75449579c81269ca6225cd5b57d36073a7de6458afdfdbd 528 [] map[org.opencontainers.image.created:2000-01-01T00:00:00Z] [] <nil> application/vnd.example+type} 61 // Manifest content: {"schemaVersion":2,"mediaType":"application/vnd.oci.image.manifest.v1+json","artifactType":"application/vnd.example+type","config":{"mediaType":"application/vnd.oci.empty.v1+json","digest":"sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a","size":2,"data":"e30="},"layers":[{"mediaType":"application/vnd.oci.empty.v1+json","digest":"sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a","size":2,"data":"e30="}],"annotations":{"org.opencontainers.image.created":"2000-01-01T00:00:00Z"}} 62 } 63 64 // ExampleImageV10 demonstrates packing an OCI Image Manifest as defined in 65 // image-spec v1.0.2. 66 func ExamplePackManifest_imageV10() { 67 // 0. Create a storage 68 store := memory.New() 69 70 // 1. Set optional parameters 71 opts := oras.PackManifestOptions{ 72 ManifestAnnotations: map[string]string{ 73 // this timestamp will be automatically generated if not specified 74 // use a fixed value here in order to test the output 75 ocispec.AnnotationCreated: "2000-01-01T00:00:00Z", 76 }, 77 } 78 ctx := context.Background() 79 80 // 2. Pack a manifest 81 artifactType := "application/vnd.example+type" 82 manifestDesc, err := oras.PackManifest(ctx, store, oras.PackManifestVersion1_0, artifactType, opts) 83 if err != nil { 84 panic(err) 85 } 86 fmt.Println("Manifest descriptor:", manifestDesc) 87 88 // 3. Verify the packed manifest 89 manifestData, err := content.FetchAll(ctx, store, manifestDesc) 90 if err != nil { 91 panic(err) 92 } 93 fmt.Println("Manifest content:", string(manifestData)) 94 95 // Output: 96 // Manifest descriptor: {application/vnd.oci.image.manifest.v1+json sha256:da221a11559704e4971c3dcf6564303707a333c8de8cb5475fc48b0072b36c19 308 [] map[org.opencontainers.image.created:2000-01-01T00:00:00Z] [] <nil> application/vnd.example+type} 97 // Manifest content: {"schemaVersion":2,"mediaType":"application/vnd.oci.image.manifest.v1+json","config":{"mediaType":"application/vnd.example+type","digest":"sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a","size":2},"layers":[],"annotations":{"org.opencontainers.image.created":"2000-01-01T00:00:00Z"}} 98 }