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// Copyright 2016 The LUCI 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.
// Command prpc can make RPCs to pRPC servers and display their description.
//
// Subcommand call
//
// call subcommand reads from stdin, sends a request to a specified service
// at a specified server in a special format (defaults to json) and
// prints the response back to stdout.
//
// $ echo '{"name": "Lucy"}' | prpc call :8080 helloworld.Greeter.SayHello
// {
// "message": "Hello Lucy"
// }
//
// Subcommand show
//
// show subcommand resolves a name and describes the referenced entity
// in proto-like syntax. If name is not specified, lists available services.
//
// $ prpc show :8080
// helloworld.Greeter
// discovery.Discovery
//
// Show a service:
//
// $ prpc show :8080 helloworld.Greeter
// // The greeting service definition.
// service Greeter {
// // Sends a greeting
// rpc SayHello(HelloRequest) returns (HelloReply) {};
// }
//
// Show a method:
//
// $ prpc show :8080 helloworld.Greeter.SayHello
// // The greeting service definition.
// service Greeter {
// // Sends a greeting
// rpc SayHello(HelloRequest) returns (HelloReply) {};
// }
//
// // The request message containing the user's name.
// message HelloRequest {
// string name = 1;
// }
//
// // The response message containing the greetings
// message HelloReply {
// string message = 1;
// }
//
// Show a type:
//
// $ prpc show :8080 helloworld.HelloReply
// // The response message containing the greetings
// message HelloReply {
// string message = 1;
// }
package main