all: update links to Protocol Buffer documentation

https://developers.google.com/protocol-buffers/ states that
this site will be deprecated January 2023 and provides
https://protobuf.dev/ as a link to the new location.

Generated .pb.go files are created by generate.bash using Go 1.18,
so leave them unchanged for now.

Fixes golang/protobuf#1520.

Change-Id: I1ddf6f329c96ba05d7c7d8562ad2945f479ee09b
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/466375
Reviewed-by: Michael Stapelberg <stapelberg@google.com>
Reviewed-by: Lasse Folger <lassefolger@google.com>

README.md

@@ -4,14 +4,14 @@
 [![Build Status](https://travis-ci.org/protocolbuffers/protobuf-go.svg?branch=master)](https://travis-ci.org/protocolbuffers/protobuf-go)
 
 This project hosts the Go implementation for
-[protocol buffers](https://developers.google.com/protocol-buffers), which is a
+[protocol buffers](https://protobuf.dev), which is a
 language-neutral, platform-neutral, extensible mechanism for serializing
 structured data. The protocol buffer language is a language for specifying the
 schema for structured data. This schema is compiled into language specific
 bindings. This project provides both a tool to generate Go code for the
 protocol buffer language, and also the runtime implementation to handle
 serialization of messages in Go. See the
-[protocol buffer developer guide](https://developers.google.com/protocol-buffers/docs/overview)
+[protocol buffer developer guide](https://protobuf.dev/overview)
 for more information about protocol buffers themselves.
 
 This project is comprised of two components:
@@ -20,7 +20,7 @@ This project is comprised of two components:
     [`protoc-gen-go`](https://pkg.go.dev/google.golang.org/protobuf/cmd/protoc-gen-go)
     tool is a compiler plugin to `protoc`, the protocol buffer compiler. It
     augments the `protoc` compiler so that it knows how to
-    [generate Go specific code for a given `.proto` file](https://developers.google.com/protocol-buffers/docs/reference/go-generated).
+    [generate Go specific code for a given `.proto` file](https://protobuf.dev/reference/go/go-generated).
 
 *   Runtime library: The
     [`protobuf`](https://pkg.go.dev/mod/google.golang.org/protobuf) module
@@ -34,7 +34,7 @@ This project is comprised of two components:
     [text](https://pkg.go.dev/google.golang.org/protobuf/encoding/prototext)).
 
 See the
-[developer guide for protocol buffers in Go](https://developers.google.com/protocol-buffers/docs/gotutorial)
+[developer guide for protocol buffers in Go](https://protobuf.dev/getting-started/gotutorial)
 for a general guide for how to get started using protobufs in Go.
 
 This project is the second major revision of the Go protocol buffer API

cmd/protoc-gen-go/main.go

@@ -6,8 +6,7 @@
 // both proto2 and proto3 versions of the protocol buffer language.
 //
 // For more information about the usage of this plugin, see:
-//
-//	https://developers.google.com/protocol-buffers/docs/reference/go-generated
+// https://protobuf.dev/reference/go/go-generated.
 package main
 
 import (
@@ -22,7 +21,7 @@ import (
 	"google.golang.org/protobuf/internal/version"
 )
 
-const genGoDocURL = "https://developers.google.com/protocol-buffers/docs/reference/go-generated"
+const genGoDocURL = "https://protobuf.dev/reference/go/go-generated"
 const grpcDocURL = "https://grpc.io/docs/languages/go/quickstart/#regenerate-grpc-code"
 
 func main() {

compiler/protogen/protogen.go

@@ -39,7 +39,7 @@ import (
 	"google.golang.org/protobuf/types/pluginpb"
 )
 
-const goPackageDocURL = "https://developers.google.com/protocol-buffers/docs/reference/go-generated#package"
+const goPackageDocURL = "https://protobuf.dev/reference/go/go-generated#package"
 
 // Run executes a function as a protoc plugin.
 //

encoding/protojson/doc.go

@@ -4,7 +4,7 @@
 
 // Package protojson marshals and unmarshals protocol buffer messages as JSON
 // format. It follows the guide at
-// https://developers.google.com/protocol-buffers/docs/proto3#json.
+// https://protobuf.dev/programming-guides/proto3#json.
 //
 // This package produces a different output than the standard "encoding/json"
 // package, which does not operate correctly on protocol buffer messages.

encoding/protowire/wire.go

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 // Package protowire parses and formats the raw wire encoding.
-// See https://developers.google.com/protocol-buffers/docs/encoding.
+// See https://protobuf.dev/programming-guides/encoding.
 //
 // For marshaling and unmarshaling entire protobuf messages,
 // use the "google.golang.org/protobuf/proto" package instead.

proto/doc.go

@@ -5,16 +5,13 @@
 // Package proto provides functions operating on protocol buffer messages.
 //
 // For documentation on protocol buffers in general, see:
-//
-//	https://developers.google.com/protocol-buffers
+// https://protobuf.dev.
 //
 // For a tutorial on using protocol buffers with Go, see:
-//
-//	https://developers.google.com/protocol-buffers/docs/gotutorial
+// https://protobuf.dev/getting-started/gotutorial.
 //
 // For a guide to generated Go protocol buffer code, see:
-//
-//	https://developers.google.com/protocol-buffers/docs/reference/go-generated
+// https://protobuf.dev/reference/go/go-generated.
 //
 // # Binary serialization
 //

reflect/protoregistry/registry.go

@@ -46,7 +46,7 @@ var conflictPolicy = "panic" // "panic" | "warn" | "ignore"
 // It is a variable so that the behavior is easily overridden in another file.
 var ignoreConflict = func(d protoreflect.Descriptor, err error) bool {
 	const env = "GOLANG_PROTOBUF_REGISTRATION_CONFLICT"
-	const faq = "https://developers.google.com/protocol-buffers/docs/reference/go/faq#namespace-conflict"
+	const faq = "https://protobuf.dev/reference/go/faq#namespace-conflict"
 	policy := conflictPolicy
 	if v := os.Getenv(env); v != "" {
 		policy = v

testing/protopack/pack.go

@@ -7,7 +7,7 @@
 // This package is intended for use in debugging and/or creation of test data.
 // Proper usage of this package requires knowledge of the wire format.
 //
-// See https://developers.google.com/protocol-buffers/docs/encoding.
+// See https://protobuf.dev/programming-guides/encoding.
 package protopack
 
 import (