Fix Duplicate Declarations (#17)

* only declare used messages and enums

* update pascalCase

* refactor

* prevent redefining internal messages

* minor

* update sample

* move the Location

* fix enum generation

* update sample

* refactor

* upgrade dependencies

* bump version

* remove protoc version

* update samples

* update actions

* upgrade actions/checkout

* bug fix

.github/workflows/go.yml

@@ -2,27 +2,27 @@ name: Go
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-go@v2
-      with:
-        go-version: '^1.17'
-    - uses: arduino/setup-protoc@v1
-      with:
-        version: '3.19.1'
-    - name: Run go test
-      run: go test -v ./...
-    - name: Install protoc-gen-pubsub-schema
-      run: go install
-    - name: Run examples
-      run: protoc example/user_add_comment.proto --pubsub-schema_out=.
-    - name: Verify examples are working
-      run: if [ -n "$(git status --porcelain)" ]; then git status; exit 1; fi
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
+        with:
+          go-version: "1.18"
+      - uses: arduino/setup-protoc@v1
+        with:
+          version: "3.x"
+      - name: Run go test
+        run: go test -v ./...
+      - name: Install protoc-gen-pubsub-schema
+        run: go install
+      - name: Run examples
+        run: protoc example/article_commented.proto --pubsub-schema_out=.
+      - name: Verify examples are working
+        run: if [ -n "$(git status --porcelain)" ]; then git status; exit 1; fi

README.md

@@ -35,12 +35,12 @@ protoc PROTO_FILES --pubsub-schema_out=OUT_DIR --pubsub-schema_opt=message-encod
 
 ## Example
 
-The following example shows how to generate [example/user_add_comment.pps](example/user_add_comment.pps) from [example/user_add_comment.proto](example/user_add_comment.proto).
+The following example shows how to generate [example/article_commented.pps](example/article_commented.pps) from [example/article_commented.proto](example/article_commented.proto).
 
 ```sh
 # include go compiled binaries in the $PATH if it hasn't been there yet
 export PATH=$PATH:$(go env GOPATH)/bin
 
-# generate example/user_add_comment.pps
-protoc example/user_add_comment.proto --pubsub-schema_out=.
+# generate example/article_commented.pps
+protoc example/article_commented.proto --pubsub-schema_out=.
 ```

content_builder.go

@@ -5,53 +5,53 @@ import (
 	"fmt"
 	"strings"
 
+	"golang.org/x/exp/slices"
 	"google.golang.org/protobuf/types/descriptorpb"
 )
 
 type contentBuilder struct {
 	*responseBuilder
+	file   *descriptorpb.FileDescriptorProto
 	output *strings.Builder
 }
 
-func newContentBuilder(b *responseBuilder) *contentBuilder {
-	return &contentBuilder{b, new(strings.Builder)}
+func newContentBuilder(b *responseBuilder, file *descriptorpb.FileDescriptorProto) *contentBuilder {
+	return &contentBuilder{b, file, new(strings.Builder)}
 }
 
-func (b *contentBuilder) build(protoFile *descriptorpb.FileDescriptorProto) (string, error) {
-	if protoFile == nil {
-		return "", errors.New("build(protoFile *descriptorpb.FileDescriptorProto): protoFile is nil")
+func (b *contentBuilder) build() (string, error) {
+	if b.file == nil {
+		return "", errors.New("contentBuilder.build(): protoFile is nil")
 	}
 
-	if len(protoFile.GetMessageType()) != 1 {
-		return "", errors.New(protoFile.GetName() + ": only one top-level type may be defined in a file (see https://cloud.google.com/pubsub/docs/schemas#schema_types). use nested types or imports (see https://developers.google.com/protocol-buffers/docs/proto)")
+	if len(b.file.GetMessageType()) != 1 {
+		return "", errors.New(b.file.GetName() + ": only one top-level type may be defined in a file (see https://cloud.google.com/pubsub/docs/schemas#schema_types). use nested types or imports (see https://developers.google.com/protocol-buffers/docs/proto)")
 	}
 
-	compVersion := b.request.GetCompilerVersion()
 	fmt.Fprintf(b.output, "// Code generated by protoc-gen-pubsub-schema. DO NOT EDIT.\n")
 	fmt.Fprintf(b.output, "// versions:\n")
-	fmt.Fprintf(b.output, "// 	protoc-gen-pubsub-schema v1.5.0\n")
-	fmt.Fprintf(b.output, "// 	protoc                   v%d.%d.%d%s\n", compVersion.GetMajor(), compVersion.GetMinor(), compVersion.GetPatch(), compVersion.GetSuffix())
-	fmt.Fprintf(b.output, "// source: %s\n\n", protoFile.GetName())
+	fmt.Fprintf(b.output, "// 	protoc-gen-pubsub-schema v1.6.0\n")
+	fmt.Fprintf(b.output, "// source: %s\n\n", b.file.GetName())
 	fmt.Fprintf(b.output, "syntax = \"%s\";\n\n", b.schemaSyntax)
-	fmt.Fprintf(b.output, "package %s;\n", protoFile.GetPackage())
-	b.buildMessages(protoFile.GetMessageType(), 0)
-	b.buildEnums(protoFile.GetEnumType(), 0)
+	fmt.Fprintf(b.output, "package %s;\n", b.file.GetPackage())
+	b.buildMessages(0, b.file.GetMessageType())
+	b.buildEnums(0, b.file.GetEnumType())
 	return b.output.String(), nil
 }
 
-func (b *contentBuilder) buildMessages(messages []*descriptorpb.DescriptorProto, level int) {
+func (b *contentBuilder) buildMessages(level int, messages []*descriptorpb.DescriptorProto) {
 	built := make(map[*descriptorpb.DescriptorProto]bool)
 	for _, message := range messages {
 		if built[message] {
 			continue
 		}
 		fmt.Fprintln(b.output)
-		newMessageBuilder(b, message, level).build()
+		newMessageBuilder(b, level, message).build()
 		built[message] = true
 	}
 }
 
-func (b *contentBuilder) buildEnums(enums []*descriptorpb.EnumDescriptorProto, level int) {
+func (b *contentBuilder) buildEnums(level int, enums []*descriptorpb.EnumDescriptorProto) {
 	built := make(map[*descriptorpb.EnumDescriptorProto]bool)
 	for _, enum := range enums {
 		if built[enum] {
@@ -67,6 +67,12 @@ func (b *contentBuilder) buildEnums(enums []*descriptorpb.EnumDescriptorProto, l
 	}
 }
 
+func (b *contentBuilder) isInternalDefinition(field *descriptorpb.FieldDescriptorProto) bool {
+	return (field.GetType() == descriptorpb.FieldDescriptorProto_TYPE_MESSAGE ||
+		field.GetType() == descriptorpb.FieldDescriptorProto_TYPE_ENUM) &&
+		slices.Contains(b.fileTypeNames[b.file], field.GetTypeName())
+}
+
 func buildIndent(level int) string {
 	return strings.Repeat("  ", level)
 }

example/article_commented.pps

@@ -0,0 +1,60 @@
+// Code generated by protoc-gen-pubsub-schema. DO NOT EDIT.
+// versions:
+// 	protoc-gen-pubsub-schema v1.6.0
+// source: example/article_commented.proto
+
+syntax = "proto2";
+
+package example;
+
+message ArticleCommented {
+  required string article_id = 1;
+  required User user = 2;
+  required string comment = 3;
+  repeated ExampleCommonLabel labels = 4;
+  required GoogleProtobufTimestamp timestamp = 101;
+
+  message User {
+    required string first_name = 1;
+    optional string last_name = 2;
+    required InternalRole internal_role = 3;
+    required ExampleCommonRole external_role_major = 4;
+    required ExampleCommonRole external_role_minor = 5;
+    optional bytes avatar = 6;
+    optional Location location = 7;
+    optional GoogleProtobufTimestamp created_at = 8;
+    optional GoogleProtobufTimestamp updated_at = 9;
+
+    message GoogleProtobufTimestamp {
+      optional int64 seconds = 1;
+      optional int32 nanos = 2;
+    }
+
+    enum ExampleCommonRole {
+      OWNER = 0;
+      EDITOR = 1;
+      VIEWER = 2;
+    }
+  }
+
+  message Location {
+    required double longitude = 1;
+    required double latitude = 2;
+  }
+
+  message ExampleCommonLabel {
+    optional string key = 1;
+    optional string value = 2;
+  }
+
+  message GoogleProtobufTimestamp {
+    optional int64 seconds = 1;
+    optional int32 nanos = 2;
+  }
+
+  enum InternalRole {
+    OWNER = 0;
+    EDITOR = 1;
+    VIEWER = 2;
+  }
+}

example/article_commented.proto

@@ -0,0 +1,38 @@
+syntax = "proto2";
+
+package example;
+
+import "example/common/label.proto";
+import "example/common/role.proto";
+import "google/protobuf/timestamp.proto";
+
+message ArticleCommented {
+  required string article_id = 1;
+  required User user = 2;
+  required string comment = 3;
+  repeated example.common.Label labels = 4;
+  required google.protobuf.Timestamp timestamp = 101;
+
+  message User {
+    required string first_name = 1;
+    optional string last_name = 2;
+    required InternalRole internal_role = 3;
+    required example.common.Role external_role_major = 4;
+    required example.common.Role external_role_minor = 5;
+    optional bytes avatar = 6;
+    optional Location location = 7;
+    optional google.protobuf.Timestamp created_at = 8;
+    optional google.protobuf.Timestamp updated_at = 9;
+  }
+
+  message Location {
+    required double longitude = 1;
+    required double latitude = 2;
+  }
+
+  enum InternalRole {
+    OWNER = 0;
+    EDITOR = 1;
+    VIEWER = 2;
+  }
+}

go.mod

@@ -1,5 +1,8 @@
 module github.com/alpancs/protoc-gen-pubsub-schema
 
-go 1.16
+go 1.18
 
-require google.golang.org/protobuf v1.27.1
+require (
+	golang.org/x/exp v0.0.0-20221109205753-fc8884afc316
+	google.golang.org/protobuf v1.28.1
+)

go.sum

@@ -1,8 +1,9 @@
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
+golang.org/x/exp v0.0.0-20221109205753-fc8884afc316 h1:FedCSp0+vayF11p3wAQndIgu+JTcW2nLp5M+HSefjlM=
+golang.org/x/exp v0.0.0-20221109205753-fc8884afc316/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=