cipd: Implement local cache for ResolveVersion(...) call with tags.

go/src/infra/tools/cipd/internal/messages/messages.pb.go

Index: go/src/infra/tools/cipd/internal/messages/messages.pb.go
diff --git a/go/src/infra/tools/cipd/internal/messages/messages.pb.go b/go/src/infra/tools/cipd/internal/messages/messages.pb.go
new file mode 100644
index 0000000000000000000000000000000000000000..a4c2ec175200388fd5e3152a6f368103b397f04e
--- /dev/null
+++ b/go/src/infra/tools/cipd/internal/messages/messages.pb.go
@@ -0,0 +1,101 @@
+// Code generated by protoc-gen-go.
+// source: messages.proto
+// DO NOT EDIT!
+
+/*
+Package messages is a generated protocol buffer package.
+
+It is generated from these files:
+	messages.proto
+
+It has these top-level messages:
+	BlobWithSHA1
+	TagCache
+*/
+package messages
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// BlobWithSHA1 is a wrapper around a binary blob with SHA1 hash to verify
+// its integrity.
+type BlobWithSHA1 struct {
+	Blob             []byte `protobuf:"bytes,1,opt,name=blob" json:"blob,omitempty"`
+	Sha1             []byte `protobuf:"bytes,2,opt,name=sha1" json:"sha1,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *BlobWithSHA1) Reset()         { *m = BlobWithSHA1{} }
+func (m *BlobWithSHA1) String() string { return proto.CompactTextString(m) }
+func (*BlobWithSHA1) ProtoMessage()    {}
+
+func (m *BlobWithSHA1) GetBlob() []byte {
+	if m != nil {
+		return m.Blob
+	}
+	return nil
+}
+
+func (m *BlobWithSHA1) GetSha1() []byte {
+	if m != nil {
+		return m.Sha1
+	}
+	return nil
+}
+
+// TagCache stores a mapping (package name, tag) -> instance ID to speed up
+// subsequence ResolveVersion calls when tags are used.
+type TagCache struct {
+	// Capped list of entries, most recently used first.
+	Entries          []*TagCache_Entry `protobuf:"bytes,1,rep,name=entries" json:"entries,omitempty"`
+	XXX_unrecognized []byte            `json:"-"`
+}
+
+func (m *TagCache) Reset()         { *m = TagCache{} }
+func (m *TagCache) String() string { return proto.CompactTextString(m) }
+func (*TagCache) ProtoMessage()    {}
+
+func (m *TagCache) GetEntries() []*TagCache_Entry {
+	if m != nil {
+		return m.Entries
+	}
+	return nil
+}
+
+type TagCache_Entry struct {
+	Package          *string `protobuf:"bytes,1,opt,name=package" json:"package,omitempty"`
+	Tag              *string `protobuf:"bytes,2,opt,name=tag" json:"tag,omitempty"`
+	InstanceId       *string `protobuf:"bytes,3,opt,name=instance_id" json:"instance_id,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *TagCache_Entry) Reset()         { *m = TagCache_Entry{} }
+func (m *TagCache_Entry) String() string { return proto.CompactTextString(m) }
+func (*TagCache_Entry) ProtoMessage()    {}
+
+func (m *TagCache_Entry) GetPackage() string {
+	if m != nil && m.Package != nil {
+		return *m.Package
+	}
+	return ""
+}
+
+func (m *TagCache_Entry) GetTag() string {
+	if m != nil && m.Tag != nil {
+		return *m.Tag
+	}
+	return ""
+}
+
+func (m *TagCache_Entry) GetInstanceId() string {
+	if m != nil && m.InstanceId != nil {
+		return *m.InstanceId
+	}
+	return ""
+}