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

wfe-containerd-protos/proto/api/services/introspection/v1/introspection.proto

@@ -0,0 +1,133 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+syntax = "proto3";
+
+package containerd.services.introspection.v1;
+
+import "google/protobuf/any.proto";
+import "google/protobuf/empty.proto";
+import "google/protobuf/timestamp.proto";
+import "google/rpc/status.proto";
+import "types/introspection.proto";
+import "types/platform.proto";
+
+option go_package = "github.com/containerd/containerd/api/services/introspection/v1;introspection";
+
+service Introspection {
+  // Plugins returns a list of plugins in containerd.
+  //
+  // Clients can use this to detect features and capabilities when using
+  // containerd.
+  rpc Plugins(PluginsRequest) returns (PluginsResponse);
+  // Server returns information about the containerd server
+  rpc Server(google.protobuf.Empty) returns (ServerResponse);
+  // PluginInfo returns information directly from a plugin if the plugin supports it
+  rpc PluginInfo(PluginInfoRequest) returns (PluginInfoResponse);
+}
+
+message Plugin {
+  // Type defines the type of plugin.
+  //
+  // See package plugin for a list of possible values. Non core plugins may
+  // define their own values during registration.
+  string type = 1;
+
+  // ID identifies the plugin uniquely in the system.
+  string id = 2;
+
+  // Requires lists the plugin types required by this plugin.
+  repeated string requires = 3;
+
+  // Platforms enumerates the platforms this plugin will support.
+  //
+  // If values are provided here, the plugin will only be operable under the
+  // provided platforms.
+  //
+  // If this is empty, the plugin will work across all platforms.
+  //
+  // If the plugin prefers certain platforms over others, they should be
+  // listed from most to least preferred.
+  repeated types.Platform platforms = 4;
+
+  // Exports allows plugins to provide values about state or configuration to
+  // interested parties.
+  //
+  // One example is exposing the configured path of a snapshotter plugin.
+  map<string, string> exports = 5;
+
+  // Capabilities allows plugins to communicate feature switches to allow
+  // clients to detect features that may not be on be default or may be
+  // different from version to version.
+  //
+  // Use this sparingly.
+  repeated string capabilities = 6;
+
+  // InitErr will be set if the plugin fails initialization.
+  //
+  // This means the plugin may have been registered but a non-terminal error
+  // was encountered during initialization.
+  //
+  // Plugins that have this value set cannot be used.
+  google.rpc.Status init_err = 7;
+}
+
+message PluginsRequest {
+  // Filters contains one or more filters using the syntax defined in the
+  // containerd filter package.
+  //
+  // The returned result will be those that match any of the provided
+  // filters. Expanded, plugins that match the following will be
+  // returned:
+  //
+  //	filters[0] or filters[1] or ... or filters[n-1] or filters[n]
+  //
+  // If filters is zero-length or nil, all items will be returned.
+  repeated string filters = 1;
+}
+
+message PluginsResponse {
+  repeated Plugin plugins = 1;
+}
+
+message ServerResponse {
+  string uuid = 1;
+  uint64 pid = 2;
+  uint64 pidns = 3; // PID namespace, such as 4026531836
+  repeated DeprecationWarning deprecations = 4;
+}
+
+message DeprecationWarning {
+  string id = 1;
+  string message = 2;
+  google.protobuf.Timestamp last_occurrence = 3;
+}
+
+message PluginInfoRequest {
+  string type = 1;
+  string id = 2;
+
+  // Options may be used to request extra dynamic information from
+  // a plugin.
+  // This object is determined by the plugin and the plugin may return
+  // NotImplemented or InvalidArgument if it is not supported
+  google.protobuf.Any options = 3;
+}
+
+message PluginInfoResponse {
+  Plugin plugin = 1;
+  google.protobuf.Any extra = 2;
+}