refactor: remove vendored Go repos, keep only .proto files

wfe-buildkit-protos/proto/github.com/moby/buildkit/session/auth/auth.proto

@@ -0,0 +1,54 @@
+syntax = "proto3";
+
+package moby.filesync.v1;
+
+option go_package = "github.com/moby/buildkit/session/auth";
+
+service Auth{
+	rpc Credentials(CredentialsRequest) returns (CredentialsResponse);
+	rpc FetchToken(FetchTokenRequest) returns (FetchTokenResponse);
+	rpc GetTokenAuthority(GetTokenAuthorityRequest) returns (GetTokenAuthorityResponse);
+	rpc VerifyTokenAuthority(VerifyTokenAuthorityRequest) returns (VerifyTokenAuthorityResponse);
+}
+
+message CredentialsRequest {
+	string Host = 1;
+}
+
+message CredentialsResponse {
+	string Username = 1;
+	string Secret = 2;
+}
+
+message FetchTokenRequest {
+	string ClientID = 1;
+	string Host = 2;
+	string Realm = 3;
+	string Service = 4;
+	repeated string Scopes = 5;
+}
+
+message FetchTokenResponse {
+	string Token = 1;
+	int64 ExpiresIn = 2; // seconds
+	int64 IssuedAt = 3; // timestamp
+}
+
+message GetTokenAuthorityRequest {
+	string Host = 1;
+	bytes Salt = 2;
+}
+
+message GetTokenAuthorityResponse {
+	bytes PublicKey = 1;
+}
+
+message VerifyTokenAuthorityRequest {
+	string Host = 1;
+	bytes Payload = 2;
+	bytes Salt = 3;
+}
+
+message VerifyTokenAuthorityResponse {
+	bytes Signed = 1;
+}

wfe-buildkit-protos/proto/github.com/moby/buildkit/session/exporter/exporter.proto

@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+package moby.exporter.v1;
+
+option go_package = "github.com/moby/buildkit/session/exporter";
+
+service Exporter {
+	rpc FindExporters(FindExportersRequest) returns (FindExportersResponse);
+}
+
+message FindExportersRequest{
+	map<string, bytes> metadata = 1;
+	repeated string refs = 2;
+}
+
+message FindExportersResponse {
+	repeated ExporterRequest exporters = 1;
+}
+
+message ExporterRequest {
+	string Type = 1;
+	map<string, string> Attrs = 2;
+}

wfe-buildkit-protos/proto/github.com/moby/buildkit/session/filesync/filesync.proto

@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+package moby.filesync.v1;
+
+option go_package = "github.com/moby/buildkit/session/filesync";
+
+import "github.com/tonistiigi/fsutil/types/wire.proto";
+
+// FileSync exposes local files from the client to the server.
+service FileSync{
+	rpc DiffCopy(stream fsutil.types.Packet) returns (stream fsutil.types.Packet);
+	rpc TarStream(stream fsutil.types.Packet) returns (stream fsutil.types.Packet);
+}
+
+// FileSend allows sending files from the server back to the client.
+service FileSend{
+	rpc DiffCopy(stream BytesMessage) returns (stream BytesMessage);
+}
+
+// BytesMessage contains a chunk of byte data
+message BytesMessage {
+	bytes data = 1;
+}

wfe-buildkit-protos/proto/github.com/moby/buildkit/session/secrets/secrets.proto

@@ -0,0 +1,19 @@
+syntax = "proto3";
+
+package moby.buildkit.secrets.v1;
+
+option go_package = "github.com/moby/buildkit/session/secrets";
+
+service Secrets{
+	rpc GetSecret(GetSecretRequest) returns (GetSecretResponse);
+}
+
+
+message GetSecretRequest {
+	string ID = 1;
+	map<string, string> annotations = 2;
+}
+
+message GetSecretResponse {
+	bytes data = 1;
+}

wfe-buildkit-protos/proto/github.com/moby/buildkit/session/sshforward/ssh.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+
+package moby.sshforward.v1;
+
+option go_package = "github.com/moby/buildkit/session/sshforward";
+
+service SSH {
+	rpc CheckAgent(CheckAgentRequest) returns (CheckAgentResponse);
+	rpc ForwardAgent(stream BytesMessage) returns (stream BytesMessage);
+}
+
+// BytesMessage contains a chunk of byte data
+message BytesMessage{
+	bytes data = 1;
+}
+
+message CheckAgentRequest {
+	string ID = 1;
+}
+
+message CheckAgentResponse {
+}

wfe-buildkit-protos/proto/github.com/moby/buildkit/session/upload/upload.proto

@@ -0,0 +1,14 @@
+syntax = "proto3";
+
+package moby.upload.v1;
+
+option go_package = "github.com/moby/buildkit/session/upload";
+
+service Upload {
+	rpc Pull(stream BytesMessage) returns (stream BytesMessage);
+}
+
+// BytesMessage contains a chunk of byte data
+message BytesMessage{
+	bytes data = 1;
+}