|
| 1 | +/* |
| 2 | + Copyright The containerd Authors. |
| 3 | +
|
| 4 | + Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + you may not use this file except in compliance with the License. |
| 6 | + You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | + Unless required by applicable law or agreed to in writing, software |
| 11 | + distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + See the License for the specific language governing permissions and |
| 14 | + limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package diffservice |
| 18 | + |
| 19 | +import ( |
| 20 | + "context" |
| 21 | + |
| 22 | + diffapi "github.com/containerd/containerd/api/services/diff/v1" |
| 23 | + "github.com/containerd/containerd/api/types" |
| 24 | + "github.com/containerd/containerd/diff" |
| 25 | + "github.com/containerd/containerd/errdefs" |
| 26 | + "github.com/containerd/containerd/mount" |
| 27 | + "github.com/containerd/typeurl/v2" |
| 28 | + "github.com/opencontainers/go-digest" |
| 29 | + ocispec "github.com/opencontainers/image-spec/specs-go/v1" |
| 30 | +) |
| 31 | + |
| 32 | +type service struct { |
| 33 | + applier diff.Applier |
| 34 | + comparer diff.Comparer |
| 35 | + diffapi.UnimplementedDiffServer |
| 36 | +} |
| 37 | + |
| 38 | +func FromApplierAndComparer(a diff.Applier, c diff.Comparer) diffapi.DiffServer { |
| 39 | + return &service{ |
| 40 | + applier: a, |
| 41 | + comparer: c, |
| 42 | + } |
| 43 | +} |
| 44 | +func (s *service) Apply(ctx context.Context, er *diffapi.ApplyRequest) (*diffapi.ApplyResponse, error) { |
| 45 | + if s.applier == nil { |
| 46 | + return nil, errdefs.ToGRPC(errdefs.ErrNotImplemented) |
| 47 | + } |
| 48 | + |
| 49 | + var ( |
| 50 | + ocidesc ocispec.Descriptor |
| 51 | + err error |
| 52 | + desc = toDescriptor(er.Diff) |
| 53 | + mounts = toMounts(er.Mounts) |
| 54 | + ) |
| 55 | + |
| 56 | + var opts []diff.ApplyOpt |
| 57 | + if er.Payloads != nil { |
| 58 | + payloads := make(map[string]typeurl.Any) |
| 59 | + for k, v := range er.Payloads { |
| 60 | + payloads[k] = v |
| 61 | + } |
| 62 | + opts = append(opts, diff.WithPayloads(payloads)) |
| 63 | + } |
| 64 | + |
| 65 | + ocidesc, err = s.applier.Apply(ctx, desc, mounts, opts...) |
| 66 | + if err != nil { |
| 67 | + return nil, errdefs.ToGRPC(err) |
| 68 | + } |
| 69 | + |
| 70 | + return &diffapi.ApplyResponse{ |
| 71 | + Applied: fromDescriptor(ocidesc), |
| 72 | + }, nil |
| 73 | +} |
| 74 | + |
| 75 | +func (s *service) Diff(ctx context.Context, dr *diffapi.DiffRequest) (*diffapi.DiffResponse, error) { |
| 76 | + if s.comparer == nil { |
| 77 | + return nil, errdefs.ToGRPC(errdefs.ErrNotImplemented) |
| 78 | + } |
| 79 | + var ( |
| 80 | + ocidesc ocispec.Descriptor |
| 81 | + err error |
| 82 | + aMounts = toMounts(dr.Left) |
| 83 | + bMounts = toMounts(dr.Right) |
| 84 | + ) |
| 85 | + |
| 86 | + var opts []diff.Opt |
| 87 | + if dr.MediaType != "" { |
| 88 | + opts = append(opts, diff.WithMediaType(dr.MediaType)) |
| 89 | + } |
| 90 | + if dr.Ref != "" { |
| 91 | + opts = append(opts, diff.WithReference(dr.Ref)) |
| 92 | + } |
| 93 | + if dr.Labels != nil { |
| 94 | + opts = append(opts, diff.WithLabels(dr.Labels)) |
| 95 | + } |
| 96 | + if dr.SourceDateEpoch != nil { |
| 97 | + tm := dr.SourceDateEpoch.AsTime() |
| 98 | + opts = append(opts, diff.WithSourceDateEpoch(&tm)) |
| 99 | + } |
| 100 | + |
| 101 | + ocidesc, err = s.comparer.Compare(ctx, aMounts, bMounts, opts...) |
| 102 | + if err != nil { |
| 103 | + return nil, errdefs.ToGRPC(err) |
| 104 | + } |
| 105 | + |
| 106 | + return &diffapi.DiffResponse{ |
| 107 | + Diff: fromDescriptor(ocidesc), |
| 108 | + }, nil |
| 109 | +} |
| 110 | + |
| 111 | +func toMounts(apim []*types.Mount) []mount.Mount { |
| 112 | + mounts := make([]mount.Mount, len(apim)) |
| 113 | + for i, m := range apim { |
| 114 | + mounts[i] = mount.Mount{ |
| 115 | + Type: m.Type, |
| 116 | + Source: m.Source, |
| 117 | + Target: m.Target, |
| 118 | + Options: m.Options, |
| 119 | + } |
| 120 | + } |
| 121 | + return mounts |
| 122 | +} |
| 123 | + |
| 124 | +func toDescriptor(d *types.Descriptor) ocispec.Descriptor { |
| 125 | + return ocispec.Descriptor{ |
| 126 | + MediaType: d.MediaType, |
| 127 | + Digest: digest.Digest(d.Digest), |
| 128 | + Size: d.Size, |
| 129 | + Annotations: d.Annotations, |
| 130 | + } |
| 131 | +} |
| 132 | + |
| 133 | +func fromDescriptor(d ocispec.Descriptor) *types.Descriptor { |
| 134 | + return &types.Descriptor{ |
| 135 | + MediaType: d.MediaType, |
| 136 | + Digest: d.Digest.String(), |
| 137 | + Size: d.Size, |
| 138 | + Annotations: d.Annotations, |
| 139 | + } |
| 140 | +} |
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