Merge pull request 'fix gen' (#90) from ff into master

Reviewed-on: #90

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  # Maintain dependencies for Golang
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/renovate.json

@@ -1,20 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ],
-  "postUpdateOptions": ["gomodTidy"],
-  "packageRules": [
-    {
-      "matchUpdateTypes": ["minor", "patch", "pin", "digest"],
-      "automerge": true
-    },
-    {
-      "groupName": "all deps",
-      "separateMajorMinor": true,
-      "groupSlug": "all",
-      "packagePatterns": [
-        "*"
-      ]
-    }
-  ]
-}

.github/workflows/autoapprove.yml

@@ -0,0 +1,20 @@
+name: "autoapprove"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  autoapprove:
+    runs-on: ubuntu-latest
+    steps:
+      - name: approve
+        uses: hmarr/auto-approve-action@v3
+        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/automerge.yml

@@ -0,0 +1,21 @@
+name: "automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'vtolstov'
+    steps:
+      - name: merge
+        id: merge
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/build.yml

@@ -3,19 +3,20 @@ on:
  push:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: 1.16
+        go-version: 1.17
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,78 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "codeql"
+
+on:
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+  push:
+    branches: [ master, v3 ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master, v3 ]
+  schedule:
+    - cron: '34 1 * * 0'
+
+jobs:
+  analyze:
+    name: analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    # Initializes the CodeQL tools for scanning.
+    - name: init
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: analyze
+      uses: github/codeql-action/analyze@v2

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,27 @@
+name: "dependabot-automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.3.6
+        with:
+          github-token: "${{ secrets.TOKEN }}"
+      - name: merge
+        id: merge
+        if: ${{contains(steps.metadata.outputs.dependency-names, 'go.unistack.org')}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/pr.yml

@@ -3,19 +3,20 @@ on:
   pull_request:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: 1.16
+        go-version: 1.17
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.gitignore

@@ -0,0 +1,38 @@
+# Develop tools
+/.vscode/
+/.idea/
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Folders
+_obj
+_test
+_build
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# vim temp files
+*~
+*.swp
+*.swo
+/protoc-gen-go-micro
+

README.md

@@ -1,4 +1,4 @@
-# `protoc-gen-micro`
+# `protoc-gen-go-micro`
 protobuf plugin to generate helper code for micro framework
 
 A generic **code**/script/data generator based on [Protobuf](https://developers.google.com/protocol-buffers/).
@@ -10,16 +10,17 @@ This project is a generator plugin for the Google Protocol Buffers compiler (`pr
 ## Usage
 
 ```console
-$> protoc --micro_out=debug=true,components="micro|http":. input.proto
+$> protoc --go_micro_out=debug=true,components="micro|http":. input.proto
 ```
 
 | Option                | Default Value | Accepted Values           | Description
 |-----------------------|---------------|---------------------------|-----------------------
+| `tag_path`            | `.`           | `any local path`          | path contains generated protobuf code that needs to be tagged
 | `debug`               | *false*       | `true` or `false`         | if *true*, `protoc` will generate a more verbose output
-| `components`          | `micro`       | `micro rpc http chi gorilla` | some values cant coexists like gorilla/chi or rpc/http, values must be concatinated with pipe symbol
+| `components`          | `micro`       | `micro rpc http chi gorilla client server` | some values can't coexists like gorilla/chi or rpc/http, values must be concatinated with pipe symbol
 
 ## Install
 
 * Install the **go** compiler and tools from https://golang.org/doc/install
-* Install **protoc-gen-go**: `go get google.golang.org/protobuf/cmd/protoc-gen-go`
-* Install **protoc-gen-micro**: `go get github.com/unistack-org/protoc-gen-micro/v3`
+* Install **protoc-gen-go**: `go install google.golang.org/protobuf/cmd/protoc-gen-go`
+* Install **protoc-gen-go-micro**: `go install go.unistack.org/protoc-gen-go-micro/v4`

ast.go

@@ -0,0 +1,170 @@
+package main
+
+import (
+	"go/ast"
+	"go/format"
+	"go/parser"
+	"go/token"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/fatih/structtag"
+	tag_options "go.unistack.org/micro-proto/v4/tag"
+	"google.golang.org/protobuf/compiler/protogen"
+	"google.golang.org/protobuf/proto"
+)
+
+var astFields = make(map[string]map[string]map[string]*structtag.Tags) // map proto file with proto message ast struct
+
+func (g *Generator) astFill(file *protogen.File, message *protogen.Message) error {
+	for _, field := range message.Fields {
+		if field.Desc.Options() == nil {
+			continue
+		}
+		if !proto.HasExtension(field.Desc.Options(), tag_options.E_Tags) {
+			continue
+		}
+
+		opts := proto.GetExtension(field.Desc.Options(), tag_options.E_Tags)
+		if opts != nil {
+			fpath := filepath.Join(g.tagPath, file.GeneratedFilenamePrefix+".pb.go")
+			mp, ok := astFields[fpath]
+			if !ok {
+				mp = make(map[string]map[string]*structtag.Tags)
+			}
+			nmp, ok := mp[message.GoIdent.GoName]
+			if !ok {
+				nmp = make(map[string]*structtag.Tags)
+			}
+			tags, err := structtag.Parse(opts.(string))
+			if err != nil {
+				return err
+			}
+			nmp[field.GoName] = tags
+			mp[message.GoIdent.GoName] = nmp
+			astFields[fpath] = mp
+		}
+	}
+	for _, nmessage := range message.Messages {
+		if err := g.astFill(file, nmessage); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (g *Generator) astGenerate(plugin *protogen.Plugin) error {
+	if g.tagPath == "" {
+		return nil
+	}
+
+	for _, file := range plugin.Files {
+		if !file.Generate {
+			continue
+		}
+		for _, message := range file.Messages {
+			if err := g.astFill(file, message); err != nil {
+				return err
+			}
+		}
+	}
+
+	for file, mp := range astFields {
+		fset := token.NewFileSet()
+		pf, err := parser.ParseFile(fset, file, nil, parser.AllErrors|parser.ParseComments)
+		if err != nil {
+			return err
+		}
+
+		r := retag{}
+		f := func(n ast.Node) ast.Visitor {
+			if r.err != nil {
+				return nil
+			}
+
+			if v, ok := n.(*ast.TypeSpec); ok {
+				r.fields = mp[v.Name.Name]
+				return r
+			}
+
+			return nil
+		}
+
+		ast.Walk(structVisitor{f}, pf)
+
+		if r.err != nil {
+			return err
+		}
+
+		fp, err := os.OpenFile(file, os.O_WRONLY|os.O_TRUNC, os.FileMode(0644))
+		if err != nil {
+			return err
+		}
+		if err = format.Node(fp, fset, pf); err != nil {
+			fp.Close()
+			return err
+		}
+		if err = fp.Close(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+type retag struct {
+	err    error
+	fields map[string]*structtag.Tags
+}
+
+func (v retag) Visit(n ast.Node) ast.Visitor {
+	if v.err != nil {
+		return nil
+	}
+	if f, ok := n.(*ast.Field); ok {
+		if len(f.Names) == 0 {
+			return nil
+		}
+
+		newTags := v.fields[f.Names[0].String()]
+		if newTags == nil {
+			return nil
+		}
+		if f.Tag == nil {
+			f.Tag = &ast.BasicLit{
+				Kind: token.STRING,
+			}
+		}
+
+		oldTags, err := structtag.Parse(strings.Trim(f.Tag.Value, "`"))
+		if err != nil {
+			v.err = err
+			return nil
+		}
+		for _, t := range newTags.Tags() {
+			oldTags.Set(t)
+		}
+
+		f.Tag.Value = "`" + oldTags.String() + "`"
+
+		return nil
+	}
+
+	return v
+}
+
+type structVisitor struct {
+	visitor func(n ast.Node) ast.Visitor
+}
+
+func (v structVisitor) Visit(n ast.Node) ast.Visitor {
+	if tp, ok := n.(*ast.TypeSpec); ok {
+		if _, ok := tp.Type.(*ast.StructType); ok {
+			ast.Walk(v.visitor(n), n)
+			return nil // This will ensure this struct is no longer traversed
+		}
+	}
+	return v
+}

chi.go

@@ -4,9 +4,7 @@ import (
 	"google.golang.org/protobuf/compiler/protogen"
 )
 
-var (
-	chiPackageFiles map[protogen.GoPackageName]struct{}
-)
+var chiPackageFiles map[protogen.GoPackageName]struct{}
 
 func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error {
 	chiPackageFiles = make(map[protogen.GoPackageName]struct{})
@@ -23,9 +21,16 @@ func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error
 
 		chiPackageFiles[file.GoPackageName] = struct{}{}
 		gname := "micro" + "_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, file.GoImportPath)
 
-		gfile.P("// Code generated by protoc-gen-micro")
+		path := file.GoImportPath
+		if g.standalone {
+			path = "."
+		}
+		gfile := plugin.NewGeneratedFile(gname, path)
+
+		gfile.P("// Code generated by protoc-gen-go-micro. DO NOT EDIT.")
+		gfile.P("// protoc-gen-go-micro version: " + versionComment)
+		gfile.P()
 		gfile.P("package ", file.GoPackageName)
 		gfile.P()
 
@@ -36,7 +41,6 @@ func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error
 		gfile.Import(stringsPackage)
 		gfile.Import(chiPackage)
 		gfile.Import(chiMiddlewarePackage)
-		gfile.Import(microApiPackage)
 
 		gfile.P("type routeKey struct{}")
 
@@ -45,17 +49,17 @@ func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error
 		gfile.P("return value, ok")
 		gfile.P("}")
 		gfile.P()
-		gfile.P("func RegisterHandlers(r *", chiPackage.Ident("Mux"), ", h interface{}, eps []*", microApiPackage.Ident("Endpoint"), ") error {")
+		gfile.P("func RegisterHandlers(r *", chiPackage.Ident("Mux"), ", h interface{}, eps []", microServerHttpPackage.Ident("EndpointMetadata"), ") error {")
 		gfile.P("v := ", reflectPackage.Ident("ValueOf"), "(h)")
 		gfile.P("if v.NumMethod() < 1 {")
 		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("handler has no methods: %T", h)`)
 		gfile.P("}")
 		gfile.P("for _, ep := range eps {")
 		gfile.P(`idx := `, stringsPackage.Ident("Index"), `(ep.Name, ".")`)
-		gfile.P("if idx < 1 || len(ep.Name) <= idx {")
-		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid `, microApiPackage.Ident("Endpoint"), ` name: %s", ep.Name)`)
+		gfile.P(`if idx < 1 || len(ep.Name) <= idx {`)
+		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid endpoint name: %s", ep.Name)`)
 		gfile.P("}")
-		gfile.P("name := ep.Name[idx+1:]")
+		gfile.P(`name := ep.Name[idx+1:]`)
 		gfile.P("m := v.MethodByName(name)")
 		gfile.P("if !m.IsValid() || m.IsZero() {")
 		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler, method %s not found", name)`)
@@ -64,9 +68,7 @@ func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error
 		gfile.P("if !ok {")
 		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler: %#+v", m.Interface())`)
 		gfile.P("}")
-		gfile.P("for _, method := range ep.Method {")
-		gfile.P("r.With(", chiMiddlewarePackage.Ident("WithValue"), "(routeKey{}, ep.Name)).MethodFunc(method, ep.Path[0], rh)")
-		gfile.P("}")
+		gfile.P("r.With(", chiMiddlewarePackage.Ident("WithValue"), `(routeKey{}, ep.Name)).MethodFunc(ep.Method, ep.Path, rh)`)
 		gfile.P("}")
 		gfile.P("return nil")
 		gfile.P("}")

example/example.proto

@@ -0,0 +1,44 @@
+syntax = "proto3";
+
+package example;
+
+option go_package = "github.com/unistack-org/protoc-gen-go-micro/v4/example;examplepb";
+
+import "tag/tag.proto";
+import "api/annotations.proto";
+import "openapiv2/annotations.proto";
+import "google/protobuf/wrappers.proto";
+
+service Example {
+	rpc Call(CallReq) returns (CallRsp) {
+		option (micro.openapiv3.openapiv3_operation) = {
+      operation_id: "Call";
+        responses: {
+          key: "default";
+          value: {
+            description: "Error response";
+            schema: {
+              json_schema: {
+                ref: ".example.Error";
+              }
+            }
+          }
+        }
+    };
+		option (micro.api.http) = { post: "/v1/example/call/{name}"; body: "*"; };
+		option (micro.api.micro_method) = { timeout: "5s"; };
+  };
+};
+
+message CallReq {
+  string name = 1 [(micro.tag.tags) = "xml:\",attr\"" ];
+  string req = 2;
+};
+
+message CallRsp {
+  string rsp = 2;
+};
+
+message Error {
+	string msg = 1;
+};

fiealaligment.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"log"
+	"os"
+
+	"golang.org/x/tools/go/analysis/passes/fieldalignment"
+	"golang.org/x/tools/go/analysis/singlechecker"
+	"google.golang.org/protobuf/compiler/protogen"
+)
+
+func (g *Generator) fieldAlign(plugin *protogen.Plugin) error {
+	if !g.fieldaligment {
+		return nil
+	}
+
+	log.Printf("%v\n", []string{"fieldalignment", "-fix", g.tagPath})
+	origArgs := os.Args
+	os.Args = []string{"fieldalignment", "-fix", g.tagPath}
+	singlechecker.Main(fieldalignment.Analyzer)
+	os.Args = origArgs
+
+	return nil
+}

go.mod

@@ -1,9 +1,18 @@
-module github.com/unistack-org/protoc-gen-micro/v3
+module go.unistack.org/protoc-gen-go-micro/v4
 
-go 1.16
+go 1.19
 
 require (
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.2.0
-	google.golang.org/genproto v0.0.0-20210223151946-22b48be4551b
-	google.golang.org/protobuf v1.25.0
+	github.com/fatih/structtag v1.2.0
+	go.unistack.org/micro-proto/v4 v4.0.1
+	golang.org/x/tools v0.11.0
+	google.golang.org/protobuf v1.31.0
+)
+
+require (
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/gnostic v0.6.9 // indirect
+	golang.org/x/mod v0.12.0 // indirect
+	golang.org/x/sys v0.10.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,73 +1,33 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
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-google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
-google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
-google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210207032614-bba0dbe2a9ea/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/genproto v0.0.0-20210223151946-22b48be4551b h1:GXCSqFSSKq+L4Pi31A2Ba7j8BZCwHN8oJkREab1VokI=
-google.golang.org/genproto v0.0.0-20210223151946-22b48be4551b/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20220107163113-42d7afdf6368/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
-google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
-google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
-google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
-google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
-google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.0.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
+google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -356,21 +141,19 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
-google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

gorilla.go

@@ -4,9 +4,7 @@ import (
 	"google.golang.org/protobuf/compiler/protogen"
 )
 
-var (
-	gorillaPackageFiles map[protogen.GoPackageName]struct{}
-)
+var gorillaPackageFiles map[protogen.GoPackageName]struct{}
 
 func (g *Generator) gorillaGenerate(component string, plugin *protogen.Plugin) error {
 	gorillaPackageFiles = make(map[protogen.GoPackageName]struct{})
@@ -23,9 +21,16 @@ func (g *Generator) gorillaGenerate(component string, plugin *protogen.Plugin) e
 
 		gorillaPackageFiles[file.GoPackageName] = struct{}{}
 		gname := "micro" + "_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, file.GoImportPath)
 
-		gfile.P("// Code generated by protoc-gen-micro")
+		path := file.GoImportPath
+		if g.standalone {
+			path = "."
+		}
+		gfile := plugin.NewGeneratedFile(gname, path)
+
+		gfile.P("// Code generated by protoc-gen-go-micro. DO NOT EDIT.")
+		gfile.P("// protoc-gen-go-micro version: " + versionComment)
+		gfile.P()
 		gfile.P("package ", file.GoPackageName)
 		gfile.P()
 
@@ -33,20 +38,19 @@ func (g *Generator) gorillaGenerate(component string, plugin *protogen.Plugin) e
 		gfile.Import(httpPackage)
 		gfile.Import(reflectPackage)
 		gfile.Import(stringsPackage)
-		gfile.Import(microApiPackage)
 		gfile.Import(gorillaMuxPackage)
 
-		gfile.P("func RegisterHandlers(r *", gorillaMuxPackage.Ident("Router"), ", h interface{}, eps []*", microApiPackage.Ident("Endpoint"), ") error {")
+		gfile.P("func RegisterHandlers(r *", gorillaMuxPackage.Ident("Router"), ", h interface{}, eps []", microServerHttpPackage.Ident("EndpointMetadata"), ") error {")
 		gfile.P("v := ", reflectPackage.Ident("ValueOf"), "(h)")
 		gfile.P("if v.NumMethod() < 1 {")
 		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("handler has no methods: %T", h)`)
 		gfile.P("}")
 		gfile.P("for _, ep := range eps {")
 		gfile.P(`idx := `, stringsPackage.Ident("Index"), `(ep.Name, ".")`)
-		gfile.P("if idx < 1 || len(ep.Name) <= idx {")
-		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid `, microApiPackage.Ident("Endpoint"), ` name: %s", ep.Name)`)
+		gfile.P(`if idx < 1 || len(ep.Name) <= idx {`)
+		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid endpoint name: %s", ep.Name)`)
 		gfile.P("}")
-		gfile.P("name := ep.Name[idx+1:]")
+		gfile.P(`name := ep.Name[idx+1:]`)
 		gfile.P("m := v.MethodByName(name)")
 		gfile.P("if !m.IsValid() || m.IsZero() {")
 		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler, method %s not found", name)`)
@@ -55,7 +59,7 @@ func (g *Generator) gorillaGenerate(component string, plugin *protogen.Plugin) e
 		gfile.P("if !ok {")
 		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler: %#+v", m.Interface())`)
 		gfile.P("}")
-		gfile.P("r.HandleFunc(ep.Path[0], rh).Methods(ep.Method...).Name(ep.Name)")
+		gfile.P(`r.HandleFunc(ep.Path, rh).Methods(ep.Method).Name(ep.Name)`)
 		gfile.P("}")
 		gfile.P("return nil")
 		gfile.P("}")

http.go

@@ -1,21 +1,10 @@
 package main
 
 import (
-	"strings"
-
-	openapi_options "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
 	"google.golang.org/protobuf/compiler/protogen"
-	"google.golang.org/protobuf/proto"
 )
 
-type Error struct {
-	packageName string
-	types       []string
-}
-
-func (g *Generator) httpGenerate(component string, plugin *protogen.Plugin) error {
-	errors := make(map[string]struct{})
-
+func (g *Generator) httpGenerate(component string, plugin *protogen.Plugin, genClient bool, genServer bool) error {
 	for _, file := range plugin.Files {
 		if !file.Generate {
 			continue
@@ -25,107 +14,42 @@ func (g *Generator) httpGenerate(component string, plugin *protogen.Plugin) erro
 		}
 
 		gname := file.GeneratedFilenamePrefix + "_micro_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, file.GoImportPath)
+		path := file.GoImportPath
+		if g.standalone {
+			path = "."
+		}
+		gfile := plugin.NewGeneratedFile(gname, path)
 
-		gfile.P("// Code generated by protoc-gen-micro")
-		gfile.P("// source: ", *file.Proto.Name)
+		gfile.P("// Code generated by protoc-gen-go-micro. DO NOT EDIT.")
+		gfile.P("// protoc-gen-go-micro version: " + versionComment)
+		gfile.P("// source: ", file.Proto.GetName())
+		gfile.P()
 		gfile.P("package ", file.GoPackageName)
 		gfile.P()
 
 		gfile.Import(contextPackage)
-		gfile.Import(microApiPackage)
+
+		if genClient {
 			gfile.Import(microClientPackage)
 			gfile.Import(microClientHttpPackage)
+		}
+		if genServer {
 			gfile.Import(microServerPackage)
+		}
 
 		for _, service := range file.Services {
-			generateServiceClient(gfile, service)
-			generateServiceClientMethods(gfile, service, true)
-			generateServiceServer(gfile, service)
-			generateServiceServerMethods(gfile, service)
-			generateServiceRegister(gfile, service)
-			if component == "http" {
-				for k, v := range getErrors(service) {
-					errors[k] = v
+			g.generateServiceEndpoints(gfile, service, component)
+			if genClient {
+				g.generateServiceClient(gfile, file, service)
+				g.generateServiceClientMethods(gfile, service, component)
 			}
+			if genServer {
+				g.generateServiceServer(gfile, file, service)
+				g.generateServiceServerMethods(gfile, service)
+				g.generateServiceRegister(gfile, file, service, component)
 			}
 		}
 	}
 
-	files := make(map[string]*Error)
-	for _, file := range plugin.Files {
-		if !file.Generate {
-			continue
-		}
-
-		err, ok := files[file.GeneratedFilenamePrefix]
-		if !ok {
-			err = &Error{packageName: string(file.GoPackageName)}
-		}
-		fok := false
-		for _, message := range file.Messages {
-			if _, ok := errors["."+string(message.Desc.FullName())]; ok {
-				fok = true
-				err.types = append(err.types, string(message.Desc.FullName()))
-			}
-		}
-		if fok {
-			files[file.GeneratedFilenamePrefix] = err
-		}
-	}
-
-	for _, file := range plugin.Files {
-		for efile, err := range files {
-			if file.GeneratedFilenamePrefix != efile {
-				continue
-			}
-			gfile := plugin.NewGeneratedFile(efile+"_micro_errors.pb.go", file.GoImportPath)
-			generateServiceErrors(gfile, err)
-		}
-	}
-
 	return nil
 }
-
-func getErrors(service *protogen.Service) map[string]struct{} {
-	errors := make(map[string]struct{})
-
-	for _, method := range service.Methods {
-		if method.Desc.Options() == nil {
-			continue
-		}
-		if !proto.HasExtension(method.Desc.Options(), openapi_options.E_Openapiv2Operation) {
-			continue
-		}
-
-		opts := proto.GetExtension(method.Desc.Options(), openapi_options.E_Openapiv2Operation)
-		if opts == nil {
-			continue
-		}
-
-		r := opts.(*openapi_options.Operation)
-		for _, response := range r.Responses {
-			if response.Schema == nil || response.Schema.JsonSchema == nil {
-				continue
-			}
-			errors[response.Schema.JsonSchema.Ref] = struct{}{}
-		}
-	}
-
-	return errors
-}
-
-func generateServiceErrors(gfile *protogen.GeneratedFile, err *Error) {
-	gfile.P("// Code generated by protoc-gen-micro")
-	gfile.P("package ", err.packageName)
-	gfile.P()
-
-	gfile.Import(fmtPackage)
-
-	for _, typ := range err.types {
-		gfile.P("func (err *", typ[strings.LastIndex(typ, ".")+1:], ") Error() string {")
-		gfile.P(`return `, fmtPackage.Ident("Sprintf"), `("%#v", err)`)
-		gfile.P("}")
-		gfile.P()
-	}
-}

main.go

@@ -3,29 +3,35 @@ package main
 import (
 	"flag"
 	"fmt"
+	"os"
 	"strings"
 
 	"google.golang.org/protobuf/compiler/protogen"
+	"google.golang.org/protobuf/types/pluginpb"
 )
 
 var (
-	flags          flag.FlagSet
-	flagDebug      *bool
-	flagComponents *string
-	flagPaths      *string
-	flagModule     *string
+	flagSet           = flag.NewFlagSet(os.Args[0], flag.ExitOnError)
+	flagDebug         = flagSet.Bool("debug", false, "debug output")
+	flagStandalone    = flagSet.Bool("standalone", false, "generate file to standalone dir")
+	flagFieldaligment = flagSet.Bool("fieldaligment", false, "align struct fields in generated code")
+	flagComponents    = flagSet.String("components", "micro|rpc|http|client|server|openapiv3", "specify components to generate")
+	flagTagPath       = flagSet.String("tag_path", "", "tag rewriting dir")
+	flagOpenapiFile   = flagSet.String("openapi_file", "apidocs.swagger.json", "openapi file name")
+	flagReflection    = flagSet.Bool("reflection", false, "enable server reflection support")
+	flagHelp          = flagSet.Bool("help", false, "display help message")
 )
 
-func init() {
-	flagDebug = flags.Bool("debug", false, "")
-	flagComponents = flags.String("components", "micro|rpc", "")
-	flagPaths = flag.String("paths", "", "")
-	flagModule = flag.String("module", "", "")
-}
-
 func main() {
 	opts := &protogen.Options{
-		ParamFunc: flags.Set,
+		ParamFunc: flagSet.Set,
+	}
+
+	flagSet.Parse(os.Args[1:])
+
+	if *flagHelp {
+		flagSet.PrintDefaults()
+		return
 	}
 
 	g := &Generator{}
@@ -34,24 +40,71 @@ func main() {
 }
 
 type Generator struct {
+	components    string
+	standalone    bool
+	debug         bool
+	fieldaligment bool
+	tagPath       string
+	openapiFile   string
+	reflection    bool
+	plugin        *protogen.Plugin
 }
 
 func (g *Generator) Generate(plugin *protogen.Plugin) error {
 	var err error
 
+	g.plugin = plugin
+	g.standalone = *flagStandalone
+	g.debug = *flagDebug
+	g.components = *flagComponents
+	g.fieldaligment = *flagFieldaligment
+	g.tagPath = *flagTagPath
+	g.openapiFile = *flagOpenapiFile
+	g.reflection = *flagReflection
+	plugin.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL)
+
+	var genClient bool
+	var genServer bool
+	var genNone bool
+
+	if strings.Contains(g.components, "server") {
+		genServer = true
+	}
+	if strings.Contains(g.components, "client") {
+		genClient = true
+	}
+	if strings.Contains(g.components, "none") {
+		genNone = true
+	}
+	if strings.Contains(g.components, "rpc") || strings.Contains(g.components, "http") {
+		if !genServer && !genClient && !genNone {
+			genServer = true
+			genClient = true
+		}
+	}
+
 	// Protoc passes a slice of File structs for us to process
-	for _, component := range strings.Split(*flagComponents, "|") {
+	for _, component := range strings.Split(g.components, "|") {
 		switch component {
+		case "server", "client":
+			continue
 		case "micro":
-			err = g.microGenerate(component, plugin)
+			err = g.microGenerate(component, plugin, genClient, genServer)
+			if err == nil {
+				err = g.writeErrors(plugin)
+			}
 		case "http":
-			err = g.httpGenerate(component, plugin)
-		case "grpc", "rpc":
-			err = g.rpcGenerate(component, plugin)
+			err = g.httpGenerate(component, plugin, genClient, genServer)
+		case "grpc", "drpc", "rpc":
+			err = g.rpcGenerate(component, plugin, genClient, genServer)
 		case "gorilla":
 			err = g.gorillaGenerate(component, plugin)
 		case "chi":
 			err = g.chiGenerate(component, plugin)
+		case "openapiv3":
+			err = g.openapiv3Generate(component, plugin)
+		case "none":
+			break
 		default:
 			err = fmt.Errorf("unknown component: %s", component)
 		}
@@ -63,5 +116,15 @@ func (g *Generator) Generate(plugin *protogen.Plugin) error {
 
 	}
 
+	if err = g.astGenerate(plugin); err != nil {
+		plugin.Error(err)
+		return err
+	}
+
+	if err = g.fieldAlign(plugin); err != nil {
+		plugin.Error(err)
+		return err
+	}
+
 	return nil
 }

micro.go

@@ -1,10 +1,12 @@
 package main
 
 import (
+	"fmt"
+
 	"google.golang.org/protobuf/compiler/protogen"
 )
 
-func (g *Generator) microGenerate(component string, plugin *protogen.Plugin) error {
+func (g *Generator) microGenerate(component string, plugin *protogen.Plugin, genClient bool, genServer bool) error {
 	for _, file := range plugin.Files {
 		if !file.Generate {
 			continue
@@ -14,27 +16,53 @@ func (g *Generator) microGenerate(component string, plugin *protogen.Plugin) err
 		}
 
 		gname := file.GeneratedFilenamePrefix + "_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, file.GoImportPath)
 
-		gfile.P("// Code generated by protoc-gen-micro")
-		gfile.P("// source: ", *file.Proto.Name)
+		path := file.GoImportPath
+		if g.standalone {
+			path = "."
+		}
+		gfile := plugin.NewGeneratedFile(gname, path)
+
+		gfile.P("// Code generated by protoc-gen-go-micro. DO NOT EDIT.")
+		gfile.P("// versions:")
+		gfile.P("// - protoc-gen-go-micro " + versionComment)
+		gfile.P("// - protoc              ", protocVersion(plugin))
+		gfile.P("// source: ", file.Desc.Path())
+		gfile.P()
 		gfile.P("package ", file.GoPackageName)
 		gfile.P()
 
 		gfile.Import(contextPackage)
-		gfile.Import(microApiPackage)
-		gfile.Import(microClientPackage)
 
+		if genClient {
+			gfile.Import(microClientPackage)
+		}
 		// generate services
 		for _, service := range file.Services {
-			generateServiceEndpoints(gfile, service)
-			generateServiceClientInterface(gfile, service)
-			generateServiceClientStreamInterface(gfile, service)
-			generateServiceServerInterface(gfile, service)
-			generateServiceServerStreamInterface(gfile, service)
+			g.generateServiceName(gfile, service)
+			if genClient {
+				g.generateServiceClientInterface(gfile, service)
+				g.generateServiceClientStreamInterface(gfile, service)
+			}
+			if genServer {
+				g.generateServiceServerInterface(gfile, service)
+				g.generateServiceServerStreamInterface(gfile, service)
+			}
 		}
 
 	}
 
 	return nil
 }
+
+func protocVersion(plugin *protogen.Plugin) string {
+	v := plugin.Request.GetCompilerVersion()
+	if v == nil {
+		return "(unknown)"
+	}
+	var suffix string
+	if s := v.GetSuffix(); s != "" {
+		suffix = "-" + s
+	}
+	return fmt.Sprintf("v%d.%d.%d%s", v.GetMajor(), v.GetMinor(), v.GetPatch(), suffix)
+}

openapiv3_util.go

@@ -0,0 +1,39 @@
+package main
+
+import v3 "go.unistack.org/micro-proto/v4/openapiv3"
+
+func getMediaType(eopt interface{}) string {
+	ctype := "application/json"
+
+	if eopt == nil {
+		return ctype
+	}
+
+	if eopt == v3.E_Openapiv3Operation.InterfaceOf(v3.E_Openapiv3Operation.Zero()) {
+		return ctype
+	}
+
+	opt, ok := eopt.(*v3.Operation)
+	if !ok || opt.RequestBody == nil {
+		return ctype
+	}
+
+	if opt.GetRequestBody() == nil {
+		return ctype
+	}
+
+	if opt.GetRequestBody().GetRequestBody() == nil {
+		return ctype
+	}
+
+	c := opt.GetRequestBody().GetRequestBody().GetContent()
+	if c == nil {
+		return ctype
+	}
+
+	for _, prop := range c.GetAdditionalProperties() {
+		ctype = prop.Name
+	}
+
+	return ctype
+}

rpc.go

@@ -4,7 +4,7 @@ import (
 	"google.golang.org/protobuf/compiler/protogen"
 )
 
-func (g *Generator) rpcGenerate(component string, plugin *protogen.Plugin) error {
+func (g *Generator) rpcGenerate(component string, plugin *protogen.Plugin, genClient bool, genServer bool) error {
 	for _, file := range plugin.Files {
 		if !file.Generate {
 			continue
@@ -14,24 +14,40 @@ func (g *Generator) rpcGenerate(component string, plugin *protogen.Plugin) error
 		}
 
 		gname := file.GeneratedFilenamePrefix + "_micro_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, file.GoImportPath)
+		path := file.GoImportPath
+		if g.standalone {
+			path = "."
+		}
+		gfile := plugin.NewGeneratedFile(gname, path)
 
-		gfile.P("// Code generated by protoc-gen-micro")
-		gfile.P("// source: ", *file.Proto.Name)
+		gfile.P("// Code generated by protoc-gen-go-micro. DO NOT EDIT.")
+		gfile.P("// protoc-gen-go-micro version: " + versionComment)
+		gfile.P("// source: ", file.Proto.GetName())
+		gfile.P()
 		gfile.P("package ", file.GoPackageName)
 		gfile.P()
 
 		gfile.Import(contextPackage)
-		gfile.Import(microApiPackage)
-		gfile.Import(microClientPackage)
-		gfile.Import(microServerPackage)
 
+		if genClient {
+			gfile.Import(microClientPackage)
+		}
+		if genServer {
+			gfile.Import(microServerPackage)
+		}
 		for _, service := range file.Services {
-			generateServiceClient(gfile, service)
-			generateServiceClientMethods(gfile, service, false)
-			generateServiceServer(gfile, service)
-			generateServiceServerMethods(gfile, service)
-			generateServiceRegister(gfile, service)
+			if genClient {
+				g.generateServiceClient(gfile, file, service)
+				g.generateServiceClientMethods(gfile, service, component)
+			}
+			if genServer {
+				g.generateServiceServer(gfile, file, service)
+				g.generateServiceServerMethods(gfile, service)
+				g.generateServiceRegister(gfile, file, service, component)
+			}
+			if component == "grpc" && g.reflection {
+				g.generateServiceDesc(gfile, file, service)
+			}
 		}
 	}
 

util.go

@@ -2,84 +2,232 @@ package main
 
 import (
 	"fmt"
+	"log"
+	"net/http"
+	"strconv"
 	"strings"
+	"time"
 
-	openapi_options "github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-openapiv2/options"
-	api_options "google.golang.org/genproto/googleapis/api/annotations"
+	api_options "go.unistack.org/micro-proto/v4/api"
+	v2 "go.unistack.org/micro-proto/v4/openapiv2"
+	v3 "go.unistack.org/micro-proto/v4/openapiv3"
 	"google.golang.org/protobuf/compiler/protogen"
 	"google.golang.org/protobuf/proto"
 )
 
-var (
-	reflectPackage         = protogen.GoImportPath("reflect")
-	stringsPackage         = protogen.GoImportPath("strings")
-	fmtPackage             = protogen.GoImportPath("fmt")
-	contextPackage         = protogen.GoImportPath("context")
-	httpPackage            = protogen.GoImportPath("net/http")
-	gorillaMuxPackage      = protogen.GoImportPath("github.com/gorilla/mux")
-	chiPackage             = protogen.GoImportPath("github.com/go-chi/chi/v4")
-	chiMiddlewarePackage   = protogen.GoImportPath("github.com/go-chi/chi/v4/middleware")
-	microApiPackage        = protogen.GoImportPath("github.com/unistack-org/micro/v3/api")
-	microClientPackage     = protogen.GoImportPath("github.com/unistack-org/micro/v3/client")
-	microServerPackage     = protogen.GoImportPath("github.com/unistack-org/micro/v3/server")
-	microClientHttpPackage = protogen.GoImportPath("github.com/unistack-org/micro-client-http/v3")
-	deprecationComment     = "// Deprecated: Do not use."
-)
+var httpMethodMap = map[string]string{
+	http.MethodGet:     "MethodGet",
+	http.MethodHead:    "MethodHead",
+	http.MethodPost:    "MethodPost",
+	http.MethodPut:     "MethodPut",
+	http.MethodPatch:   "MethodPatch",
+	http.MethodDelete:  "MethodDelete",
+	http.MethodConnect: "MethodConnect",
+	http.MethodOptions: "MethodOptions",
+	http.MethodTrace:   "MethodTrace",
+}
 
 func unexport(s string) string {
 	return strings.ToLower(s[:1]) + s[1:]
 }
 
-func generateServiceClient(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
-	gfile.P("type ", unexport(serviceName), "Service struct {")
+func (g *Generator) generateServiceClient(gfile *protogen.GeneratedFile, file *protogen.File, service *protogen.Service) {
+	serviceName := getServiceName(service)
+	// if rule, ok := getMicroApiService(service); ok {
+	//		gfile.P("// client wrappers ", strings.Join(rule.ClientWrappers, ", "))
+	//	}
+	gfile.P("type ", unexport(serviceName), "Client struct {")
 	gfile.P("c ", microClientPackage.Ident("Client"))
 	gfile.P("name string")
 	gfile.P("}")
 
-	gfile.P("// New", serviceName, "Service create new service client")
-	gfile.P("func New", serviceName, "Service(name string, c ", microClientPackage.Ident("Client"), ") ", serviceName, "Service {")
-	gfile.P("return &", unexport(serviceName), "Service{c: c, name: name}")
+	if g.standalone {
+		gfile.P("func New", serviceName, "Client(name string, c ", microClientPackage.Ident("Client"), ") ", file.GoImportPath.Ident(serviceName), "Client {")
+	} else {
+		gfile.P("func New", serviceName, "Client(name string, c ", microClientPackage.Ident("Client"), ") ", serviceName, "Client {")
+	}
+	gfile.P("return &", unexport(serviceName), "Client{c: c, name: name}")
 	gfile.P("}")
 	gfile.P()
 }
 
-func generateServiceClientMethods(gfile *protogen.GeneratedFile, service *protogen.Service, http bool) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
+func (g *Generator) generateServiceClientMethods(gfile *protogen.GeneratedFile, service *protogen.Service, component string) {
+	serviceName := getServiceName(service)
 	for _, method := range service.Methods {
 		methodName := fmt.Sprintf("%s.%s", serviceName, method.GoName)
-		generateClientFuncSignature(gfile, serviceName, method)
+		if component == "drpc" {
+			methodName = fmt.Sprintf("%s.%s", method.Parent.Desc.FullName(), method.Desc.Name())
+		}
+		g.generateClientFuncSignature(gfile, serviceName, method)
 
-		if http && method.Desc.Options() != nil {
-			if proto.HasExtension(method.Desc.Options(), openapi_options.E_Openapiv2Operation) {
-				opts := proto.GetExtension(method.Desc.Options(), openapi_options.E_Openapiv2Operation)
+		if component == "http" && method.Desc.Options() != nil {
+			if proto.HasExtension(method.Desc.Options(), v2.E_Openapiv2Operation) {
+				opts := proto.GetExtension(method.Desc.Options(), v2.E_Openapiv2Operation)
 				if opts != nil {
-					r := opts.(*openapi_options.Operation)
-					gfile.P("errmap := make(map[string]interface{}, ", len(r.Responses), ")")
-					for code, response := range r.Responses {
-						if response.Schema != nil && response.Schema.JsonSchema != nil {
-							ref := response.Schema.JsonSchema.Ref
-							if strings.HasPrefix(ref, "."+string(service.Desc.ParentFile().Package())+".") {
-								ref = strings.TrimPrefix(ref, "."+string(service.Desc.ParentFile().Package())+".")
+					r := opts.(*v2.Operation)
+					if r.Responses == nil {
+						goto labelMethod
+					}
+					gfile.P("errmap := make(map[string]interface{}, ", len(r.Responses.ResponseCode), ")")
+					for _, rsp := range r.Responses.ResponseCode {
+						if schema := rsp.Value.GetJsonReference(); schema != nil {
+							xref := schema.XRef
+							if strings.HasPrefix(xref, "."+string(service.Desc.ParentFile().Package())+".") {
+								xref = strings.TrimPrefix(xref, "."+string(service.Desc.ParentFile().Package())+".")
+							}
+							if xref[0] == '.' {
+								xref = xref[1:]
+							}
+							switch xref {
+							case "micro.codec.Frame":
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, microCodecPackage.Ident("Frame"), "{}")
+							case "micro.errors.Error":
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, microErrorsPackage.Ident("Error"), "{}")
+							default:
+								ident, err := g.getGoIdentByXref(strings.TrimPrefix(schema.XRef, "."))
+								if err != nil {
+									log.Printf("cant find message by ref %s\n", schema.XRef)
+									continue
+								}
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, gfile.QualifiedGoIdent(ident), "{}")
 							}
-							gfile.P(`errmap["`, code, `"] = &`, ref, "{}")
 						}
 					}
 				}
-
 				gfile.P("opts = append(opts,")
 				gfile.P(microClientHttpPackage.Ident("ErrorMap"), "(errmap),")
-
-				if proto.HasExtension(method.Desc.Options(), api_options.E_Http) {
-					endpoints, _ := generateEndpoints(method)
-					path, method, body := getEndpoint(endpoints[0])
-					gfile.P(microClientHttpPackage.Ident("Method"), `("`, method, `"),`)
-					gfile.P(microClientHttpPackage.Ident("Path"), `("`, path, `"),`)
-					gfile.P(microClientHttpPackage.Ident("Body"), `("`, body, `"),`)
+				gfile.P(")")
+			}
+			if proto.HasExtension(method.Desc.Options(), v3.E_Openapiv3Operation) {
+				opts := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+				if opts != nil {
+					r := opts.(*v3.Operation)
+					if r.Responses == nil {
+						goto labelMethod
+					}
+					resps := r.Responses.ResponseOrReference
+					if r.Responses.GetDefault() != nil {
+						resps = append(resps, &v3.NamedResponseOrReference{Name: "default", Value: r.Responses.GetDefault()})
+					}
+					gfile.P("errmap := make(map[string]interface{}, ", len(resps), ")")
+					for _, rsp := range resps {
+						if schema := rsp.Value.GetReference(); schema != nil {
+							xref := schema.XRef
+							if strings.HasPrefix(xref, "."+string(service.Desc.ParentFile().Package())+".") {
+								xref = strings.TrimPrefix(xref, "."+string(service.Desc.ParentFile().Package())+".")
+							}
+							if xref[0] == '.' {
+								xref = xref[1:]
+							}
+							switch xref {
+							case "micro.codec.Frame":
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, microCodecPackage.Ident("Frame"), "{}")
+							case "micro.errors.Error":
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, microErrorsPackage.Ident("Error"), "{}")
+							default:
+								ident, err := g.getGoIdentByXref(strings.TrimPrefix(schema.XRef, "."))
+								if err != nil {
+									log.Printf("cant find message by ref %s\n", schema.XRef)
+									continue
+								}
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, gfile.QualifiedGoIdent(ident), "{}")
+							}
+						}
+					}
+				}
+				gfile.P("opts = append(opts,")
+				gfile.P(microClientHttpPackage.Ident("ErrorMap"), "(errmap),")
+				gfile.P(")")
 			}
 
+		labelMethod:
+			if proto.HasExtension(method.Desc.Options(), api_options.E_Http) {
+				gfile.P("opts = append(opts,")
+				endpoints, _ := generateEndpoints(method)
+				path, method, body := getEndpoint(endpoints[0])
+				if vmethod, ok := httpMethodMap[method]; ok {
+					gfile.P(microClientHttpPackage.Ident("Method"), `(`, httpPackage.Ident(vmethod), `),`)
+				} else {
+					gfile.P(microClientHttpPackage.Ident("Method"), `("`, method, `"),`)
+				}
+				gfile.P(microClientHttpPackage.Ident("Path"), `("`, path, `"),`)
+				if body != "" {
+					gfile.P(microClientHttpPackage.Ident("Body"), `("`, body, `"),`)
+				}
 				gfile.P(")")
 			}
+
+			parameters := make(map[string]map[string]string)
+			// Build a list of header parameters.
+			e2opt := proto.GetExtension(method.Desc.Options(), v2.E_Openapiv2Operation)
+			if e2opt != nil && e2opt != v2.E_Openapiv2Operation.InterfaceOf(v2.E_Openapiv2Operation.Zero()) {
+				opt := e2opt.(*v2.Operation)
+				for _, paramOrRef := range opt.Parameters {
+					parameter := paramOrRef.GetParameter()
+					// NonBodyParameter()
+					if parameter == nil {
+						continue
+					}
+					nonBodyParameter := parameter.GetNonBodyParameter()
+					if nonBodyParameter == nil {
+						continue
+					}
+					headerParameter := nonBodyParameter.GetHeaderParameterSubSchema()
+					if headerParameter.In != "header" && headerParameter.In != "cookie" {
+						continue
+					}
+					in, ok := parameters[headerParameter.In]
+					if !ok {
+						in = make(map[string]string)
+						parameters[headerParameter.In] = in
+					}
+					in[headerParameter.Name] = fmt.Sprintf("%v", headerParameter.Required)
+				}
+			}
+			e3opt := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+			if e3opt != nil && e3opt != v3.E_Openapiv3Operation.InterfaceOf(v3.E_Openapiv3Operation.Zero()) {
+				opt := e3opt.(*v3.Operation)
+				for _, paramOrRef := range opt.Parameters {
+
+					parameter := paramOrRef.GetParameter()
+					if parameter == nil {
+						continue
+					}
+					if parameter.In != "header" && parameter.In != "cookie" {
+						continue
+					}
+					in, ok := parameters[parameter.In]
+					if !ok {
+						in = make(map[string]string)
+						parameters[parameter.In] = in
+					}
+					in[parameter.Name] = fmt.Sprintf("%v", parameter.Required)
+				}
+			}
+
+			if len(parameters) > 0 {
+				gfile.P("opts = append(opts,")
+				for pk, pv := range parameters {
+					params := make([]string, 0, len(pv)/2)
+					for k, v := range pv {
+						params = append(params, k, v)
+					}
+					gfile.P(microClientHttpPackage.Ident(strings.Title(pk)), `("`, strings.Join(params, `" ,"`), `"),`)
+				}
+				gfile.P(")")
+			}
+		}
+
+		if rule, ok := getMicroApiMethod(method); ok {
+			if rule.Timeout != "" {
+				td, err := time.ParseDuration(rule.Timeout)
+				if err != nil {
+					log.Printf("parse duration error %s\n", err.Error())
+				} else {
+					gfile.P("td := ", timePackage.Ident("Duration"), "(", td.Nanoseconds(), ")")
+					gfile.P("opts = append(opts, ", microClientPackage.Ident("WithRequestTimeout"), "(td))")
+				}
+			}
 		}
 
 		if !method.Desc.IsStreamingServer() && !method.Desc.IsStreamingClient() {
@@ -104,18 +252,18 @@ func generateServiceClientMethods(gfile *protogen.GeneratedFile, service *protog
 			gfile.P("return nil, err")
 			gfile.P("}")
 		}
-		gfile.P("return &", unexport(serviceName), "Service", method.GoName, "{stream}, nil")
+		gfile.P("return &", unexport(serviceName), "Client", method.GoName, "{stream}, nil")
 		gfile.P("}")
 		gfile.P()
 
 		if method.Desc.IsStreamingServer() || method.Desc.IsStreamingClient() {
-			gfile.P("type ", unexport(serviceName), "Service", method.GoName, " struct {")
+			gfile.P("type ", unexport(serviceName), "Client", method.GoName, " struct {")
 			gfile.P("stream ", microClientPackage.Ident("Stream"))
 			gfile.P("}")
 		}
 
 		if method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
-			gfile.P("func (s *", unexport(serviceName), "Service", method.GoName, ") RecvAndClose() (*", gfile.QualifiedGoIdent(method.Output.GoIdent), ", error) {")
+			gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") CloseAndRecv() (*", gfile.QualifiedGoIdent(method.Output.GoIdent), ", error) {")
 			gfile.P("msg := &", gfile.QualifiedGoIdent(method.Output.GoIdent), "{}")
 			gfile.P("err := s.RecvMsg(msg)")
 			gfile.P("if err == nil {")
@@ -129,32 +277,41 @@ func generateServiceClientMethods(gfile *protogen.GeneratedFile, service *protog
 		}
 
 		gfile.P()
-		gfile.P("func (s *", unexport(serviceName), "Service", method.GoName, ") Close() error {")
+		gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") Close() error {")
 		gfile.P("return s.stream.Close()")
 		gfile.P("}")
 		gfile.P()
-		gfile.P("func (s *", unexport(serviceName), "Service", method.GoName, ") Context() ", contextPackage.Ident("Context"), " {")
+		gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") CloseSend() error {")
+		gfile.P("return s.stream.CloseSend()")
+		gfile.P("}")
+		gfile.P()
+		gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") Context() ", contextPackage.Ident("Context"), " {")
 		gfile.P("return s.stream.Context()")
 		gfile.P("}")
 		gfile.P()
-		gfile.P("func (s *", unexport(serviceName), "Service", method.GoName, ") SendMsg(msg interface{}) error {")
+		gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") SendMsg(msg interface{}) error {")
 		gfile.P("return s.stream.Send(msg)")
 		gfile.P("}")
 		gfile.P()
-		gfile.P("func (s *", unexport(serviceName), "Service", method.GoName, ") RecvMsg(msg interface{}) error {")
+		gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") RecvMsg(msg interface{}) error {")
 		gfile.P("return s.stream.Recv(msg)")
 		gfile.P("}")
 		gfile.P()
 
 		if method.Desc.IsStreamingClient() {
-			gfile.P("func (s *", unexport(serviceName), "Service", method.GoName, ") Send(msg *", gfile.QualifiedGoIdent(method.Input.GoIdent), ") error {")
+			gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") Header() ", microMetadataPackage.Ident("Metadata"), "{")
+			gfile.P("return s.stream.Response().Header()")
+			gfile.P("}")
+			gfile.P()
+
+			gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") Send(msg *", gfile.QualifiedGoIdent(method.Input.GoIdent), ") error {")
 			gfile.P("return s.stream.Send(msg)")
 			gfile.P("}")
 			gfile.P()
 		}
 
 		if method.Desc.IsStreamingServer() {
-			gfile.P("func (s *", unexport(serviceName), "Service", method.GoName, ") Recv() (*", gfile.QualifiedGoIdent(method.Output.GoIdent), ", error) {")
+			gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") Recv() (*", gfile.QualifiedGoIdent(method.Output.GoIdent), ", error) {")
 			gfile.P("msg := &", gfile.QualifiedGoIdent(method.Output.GoIdent), "{}")
 			gfile.P("if err := s.stream.Recv(msg); err != nil {")
 			gfile.P("return nil, err")
@@ -166,31 +323,105 @@ func generateServiceClientMethods(gfile *protogen.GeneratedFile, service *protog
 	}
 }
 
-func generateServiceServer(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
-	gfile.P("type ", unexport(serviceName), "Handler struct {")
-	gfile.P(serviceName, "Handler")
+func (g *Generator) generateServiceServer(gfile *protogen.GeneratedFile, file *protogen.File, service *protogen.Service) {
+	serviceName := getServiceName(service)
+	gfile.P("type ", unexport(serviceName), "Server struct {")
+	if g.standalone {
+		gfile.P(file.GoImportPath.Ident(serviceName), "Server")
+	} else {
+		gfile.P(serviceName, "Server")
+	}
 	gfile.P("}")
 	gfile.P()
 }
 
-func generateServiceServerMethods(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
+func (g *Generator) generateServiceServerMethods(gfile *protogen.GeneratedFile, service *protogen.Service) {
+	serviceName := getServiceName(service)
 	for _, method := range service.Methods {
 		generateServerFuncSignature(gfile, serviceName, method, true)
-
+		if rule, ok := getMicroApiMethod(method); ok {
+			if rule.Timeout != "" {
+				td, err := time.ParseDuration(rule.Timeout)
+				if err != nil {
+					log.Printf("parse duration error %s\n", err.Error())
+				} else {
+					gfile.P("var cancel ", contextPackage.Ident("CancelFunc"))
+					gfile.P("td := ", timePackage.Ident("Duration"), "(", td.Nanoseconds(), ")")
+					gfile.P("ctx, cancel = ", contextPackage.Ident("WithTimeout"), "(ctx, ", "td", ")")
+					gfile.P("defer cancel()")
+				}
+			}
+		}
 		if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
 			if !method.Desc.IsStreamingClient() {
 				gfile.P("msg := &", gfile.QualifiedGoIdent(method.Input.GoIdent), "{}")
 				gfile.P("if err := stream.Recv(msg); err != nil {")
 				gfile.P("return err")
 				gfile.P("}")
-				gfile.P("return h.", serviceName, "Handler.", method.GoName, "(ctx, msg, &", unexport(serviceName), method.GoName, "Stream{stream})")
+				gfile.P("return h.", serviceName, "Server.", method.GoName, "(ctx, msg, &", unexport(serviceName), method.GoName, "Stream{stream})")
 			} else {
-				gfile.P("return h.", serviceName, "Handler.", method.GoName, "(ctx, &", unexport(serviceName), method.GoName, "Stream{stream})")
+				gfile.P("return h.", serviceName, "Server.", method.GoName, "(ctx, &", unexport(serviceName), method.GoName, "Stream{stream})")
 			}
 		} else {
-			gfile.P("return h.", serviceName, "Handler.", method.GoName, "(ctx, req, rsp)")
+			parameters := make(map[string]map[string]string)
+			// Build a list of header parameters.
+			e2opt := proto.GetExtension(method.Desc.Options(), v2.E_Openapiv2Operation)
+			if e2opt != nil && e2opt != v2.E_Openapiv2Operation.InterfaceOf(v2.E_Openapiv2Operation.Zero()) {
+				opt := e2opt.(*v2.Operation)
+				for _, paramOrRef := range opt.Parameters {
+					parameter := paramOrRef.GetParameter()
+					// NonBodyParameter()
+					if parameter == nil {
+						continue
+					}
+					nonBodyParameter := parameter.GetNonBodyParameter()
+					if nonBodyParameter == nil {
+						continue
+					}
+					headerParameter := nonBodyParameter.GetHeaderParameterSubSchema()
+					if headerParameter.In != "header" && headerParameter.In != "cookie" {
+						continue
+					}
+					in, ok := parameters[headerParameter.In]
+					if !ok {
+						in = make(map[string]string)
+						parameters[headerParameter.In] = in
+					}
+					in[headerParameter.Name] = fmt.Sprintf("%v", headerParameter.Required)
+				}
+			}
+			e3opt := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+			if e3opt != nil && e3opt != v3.E_Openapiv3Operation.InterfaceOf(v3.E_Openapiv3Operation.Zero()) {
+				opt := e3opt.(*v3.Operation)
+				for _, paramOrRef := range opt.Parameters {
+					parameter := paramOrRef.GetParameter()
+					if parameter == nil {
+						continue
+					}
+					if parameter.In != "header" && parameter.In != "cookie" {
+						continue
+					}
+					in, ok := parameters[parameter.In]
+					if !ok {
+						in = make(map[string]string)
+						parameters[parameter.In] = in
+					}
+					in[parameter.Name] = fmt.Sprintf("%v", parameter.Required)
+				}
+			}
+
+			if len(parameters) > 0 {
+				gfile.P(microServerHttpPackage.Ident("FillRequest"), `(ctx, req, `)
+				for pk, pv := range parameters {
+					params := make([]string, 0, len(pv)/2)
+					for k, v := range pv {
+						params = append(params, k, v)
+					}
+					gfile.P(microServerHttpPackage.Ident(strings.Title(pk)), `("`, strings.Join(params, `" ,"`), `"),`)
+				}
+				gfile.P(")")
+			}
+			gfile.P("return h.", serviceName, "Server.", method.GoName, "(ctx, req, rsp)")
 		}
 		gfile.P("}")
 		gfile.P()
@@ -254,9 +485,13 @@ func generateServiceServerMethods(gfile *protogen.GeneratedFile, service *protog
 	}
 }
 
-func generateServiceRegister(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
-	gfile.P("func Register", serviceName, "Handler(s ", microServerPackage.Ident("Server"), ", sh ", serviceName, "Handler, opts ...", microServerPackage.Ident("HandlerOption"), ") error {")
+func (g *Generator) generateServiceRegister(gfile *protogen.GeneratedFile, file *protogen.File, service *protogen.Service, component string) {
+	serviceName := getServiceName(service)
+	if g.standalone {
+		gfile.P("func Register", serviceName, "Server(s ", microServerPackage.Ident("Server"), ", sh ", file.GoImportPath.Ident(serviceName), "Server, opts ...", microOptionsPackage.Ident("Option"), ") error {")
+	} else {
+		gfile.P("func Register", serviceName, "Server(s ", microServerPackage.Ident("Server"), ", sh ", serviceName, "Server, opts ...", microOptionsPackage.Ident("Option"), ") error {")
+	}
 	gfile.P("type ", unexport(serviceName), " interface {")
 	for _, method := range service.Methods {
 		generateServerSignature(gfile, serviceName, method, true)
@@ -265,17 +500,22 @@ func generateServiceRegister(gfile *protogen.GeneratedFile, service *protogen.Se
 	gfile.P("type ", serviceName, " struct {")
 	gfile.P(unexport(serviceName))
 	gfile.P("}")
-	gfile.P("h := &", unexport(serviceName), "Handler{sh}")
-	gfile.P("for _, endpoint := range New", serviceName, "Endpoints() {")
-	gfile.P("opts = append(opts, ", microApiPackage.Ident("WithEndpoint"), "(endpoint))")
-	gfile.P("}")
-	gfile.P("return s.Handle(s.NewHandler(&", serviceName, "{h}, opts...))")
+	gfile.P("h := &", unexport(serviceName), "Server{sh}")
+	gfile.P("var nopts []", microOptionsPackage.Ident("Option"))
+	if component == "http" {
+		//	if g.standalone {
+		//		gfile.P("nopts = append(nopts, ", microServerHttpPackage.Ident("HandlerEndpoints"), "(", file.GoImportPath.Ident(serviceName), "ServerEndpoints))")
+		//	} else {
+		gfile.P("nopts = append(nopts, ", microServerHttpPackage.Ident("HandlerEndpoints"), "(", serviceName, "ServerEndpoints))")
+		//	}
+	}
+	gfile.P("return s.Handle(&", serviceName, "{h}, append(nopts, opts...)...)")
 	gfile.P("}")
 }
 
 func generateServerFuncSignature(gfile *protogen.GeneratedFile, serviceName string, method *protogen.Method, private bool) {
 	args := append([]interface{}{},
-		"func (h *", unexport(serviceName), "Handler) ", method.GoName,
+		"func (h *", unexport(serviceName), "Server) ", method.GoName,
 		"(ctx ", contextPackage.Ident("Context"),
 	)
 	if private && (method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer()) {
@@ -317,22 +557,22 @@ func generateServerSignature(gfile *protogen.GeneratedFile, serviceName string,
 	gfile.P(args...)
 }
 
-func generateClientFuncSignature(gfile *protogen.GeneratedFile, serviceName string, method *protogen.Method) {
+func (g *Generator) generateClientFuncSignature(gfile *protogen.GeneratedFile, serviceName string, method *protogen.Method) {
 	args := append([]interface{}{},
 		"func (c *",
 		unexport(serviceName),
-		"Service) ",
+		"Client) ",
 		method.GoName,
 		"(ctx ", contextPackage.Ident("Context"), ", ",
 	)
 	if !method.Desc.IsStreamingClient() {
 		args = append(args, "req *", gfile.QualifiedGoIdent(method.Input.GoIdent), ", ")
 	}
-	args = append(args, "opts ...", microClientPackage.Ident("CallOption"), ") (")
+	args = append(args, "opts ...", microOptionsPackage.Ident("Option"), ") (")
 	if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
 		args = append(args, "*", gfile.QualifiedGoIdent(method.Output.GoIdent))
 	} else {
-		args = append(args, serviceName, "_", method.GoName, "Service")
+		args = append(args, gfile.QualifiedGoIdent(protogen.GoIdent{GoName: serviceName + "_" + method.GoName + "Client", GoImportPath: method.Output.GoIdent.GoImportPath}))
 	}
 	args = append(args, ", error) {")
 	gfile.P(args...)
@@ -346,19 +586,19 @@ func generateClientSignature(gfile *protogen.GeneratedFile, serviceName string,
 	if !method.Desc.IsStreamingClient() {
 		args = append(args, "req *", gfile.QualifiedGoIdent(method.Input.GoIdent), ", ")
 	}
-	args = append(args, "opts ...", microClientPackage.Ident("CallOption"), ") (")
+	args = append(args, "opts ...", microOptionsPackage.Ident("Option"), ") (")
 	if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
 		args = append(args, "*", gfile.QualifiedGoIdent(method.Output.GoIdent))
 	} else {
-		args = append(args, serviceName, "_", method.GoName, "Service")
+		args = append(args, serviceName, "_", method.GoName, "Client")
 	}
 	args = append(args, ", error)")
 	gfile.P(args...)
 }
 
-func generateServiceClientInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
-	gfile.P("type ", serviceName, "Service interface {")
+func (g *Generator) generateServiceClientInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
+	serviceName := getServiceName(service)
+	gfile.P("type ", serviceName, "Client interface {")
 	for _, method := range service.Methods {
 		generateClientSignature(gfile, serviceName, method)
 	}
@@ -366,9 +606,9 @@ func generateServiceClientInterface(gfile *protogen.GeneratedFile, service *prot
 	gfile.P()
 }
 
-func generateServiceServerInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
-	gfile.P("type ", serviceName, "Handler interface {")
+func (g *Generator) generateServiceServerInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
+	serviceName := getServiceName(service)
+	gfile.P("type ", serviceName, "Server interface {")
 	for _, method := range service.Methods {
 		generateServerSignature(gfile, serviceName, method, false)
 	}
@@ -376,22 +616,24 @@ func generateServiceServerInterface(gfile *protogen.GeneratedFile, service *prot
 	gfile.P()
 }
 
-func generateServiceClientStreamInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
+func (g *Generator) generateServiceClientStreamInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
+	serviceName := getServiceName(service)
 	for _, method := range service.Methods {
 		if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
 			continue
 		}
 		methodName := method.GoName
-		gfile.P("type ", serviceName, "_", methodName, "Service interface {")
+		gfile.P("type ", serviceName, "_", methodName, "Client interface {")
 		gfile.P("Context() ", contextPackage.Ident("Context"))
 		gfile.P("SendMsg(msg interface{}) error")
 		gfile.P("RecvMsg(msg interface{}) error")
 		if method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
-			gfile.P("RecvAndClose() (*", gfile.QualifiedGoIdent(method.Output.GoIdent), ", error)")
+			gfile.P("CloseAndRecv() (*", gfile.QualifiedGoIdent(method.Output.GoIdent), ", error)")
+			gfile.P("CloseSend() error")
 		}
 		gfile.P("Close() error")
 		if method.Desc.IsStreamingClient() {
+			gfile.P("Header() ", microMetadataPackage.Ident("Metadata"))
 			gfile.P("Send(msg *", gfile.QualifiedGoIdent(method.Input.GoIdent), ") error")
 		}
 		if method.Desc.IsStreamingServer() {
@@ -402,8 +644,8 @@ func generateServiceClientStreamInterface(gfile *protogen.GeneratedFile, service
 	}
 }
 
-func generateServiceServerStreamInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
+func (g *Generator) generateServiceServerStreamInterface(gfile *protogen.GeneratedFile, service *protogen.Service) {
+	serviceName := getServiceName(service)
 	for _, method := range service.Methods {
 		if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
 			continue
@@ -415,6 +657,7 @@ func generateServiceServerStreamInterface(gfile *protogen.GeneratedFile, service
 		gfile.P("RecvMsg(msg interface{}) error")
 		if method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
 			gfile.P("SendAndClose(msg *", gfile.QualifiedGoIdent(method.Output.GoIdent), ") error")
+			//	gfile.P("CloseSend() error")
 		}
 		gfile.P("Close() error")
 		if method.Desc.IsStreamingClient() {
@@ -428,29 +671,6 @@ func generateServiceServerStreamInterface(gfile *protogen.GeneratedFile, service
 	}
 }
 
-func generateServiceEndpoints(gfile *protogen.GeneratedFile, service *protogen.Service) {
-	serviceName := strings.TrimSuffix(service.GoName, "Service")
-	gfile.P("// New", serviceName, "Endpoints provides api endpoints metdata for ", serviceName, " service")
-	gfile.P("func New", serviceName, "Endpoints() []*", microApiPackage.Ident("Endpoint"), " {")
-	gfile.P("return []*", microApiPackage.Ident("Endpoint"), "{")
-	for _, method := range service.Methods {
-		if method.Desc.Options() == nil {
-			continue
-		}
-		if proto.HasExtension(method.Desc.Options(), api_options.E_Http) {
-			endpoints, streaming := generateEndpoints(method)
-			for _, endpoint := range endpoints {
-				gfile.P("&", microApiPackage.Ident("Endpoint"), "{")
-				generateEndpoint(gfile, serviceName, method.GoName, endpoint, streaming)
-				gfile.P("},")
-			}
-		}
-	}
-	gfile.P("}")
-	gfile.P("}")
-	gfile.P()
-}
-
 func generateEndpoints(method *protogen.Method) ([]*api_options.HttpRule, bool) {
 	if method.Desc.Options() == nil {
 		return nil, false
@@ -472,6 +692,42 @@ func generateEndpoints(method *protogen.Method) ([]*api_options.HttpRule, bool)
 	return rules, method.Desc.IsStreamingServer() || method.Desc.IsStreamingClient()
 }
 
+func getMicroApiMethod(method *protogen.Method) (*api_options.MicroMethod, bool) {
+	if method.Desc.Options() == nil {
+		return nil, false
+	}
+
+	if !proto.HasExtension(method.Desc.Options(), api_options.E_MicroMethod) {
+		return nil, false
+	}
+
+	r := proto.GetExtension(method.Desc.Options(), api_options.E_MicroMethod)
+	if r == nil {
+		return nil, false
+	}
+
+	rule := r.(*api_options.MicroMethod)
+	return rule, true
+}
+
+func getMicroApiService(service *protogen.Service) (*api_options.MicroService, bool) {
+	if service.Desc.Options() == nil {
+		return nil, false
+	}
+
+	if !proto.HasExtension(service.Desc.Options(), api_options.E_MicroService) {
+		return nil, false
+	}
+
+	r := proto.GetExtension(service.Desc.Options(), api_options.E_MicroService)
+	if r == nil {
+		return nil, false
+	}
+
+	rule := r.(*api_options.MicroService)
+	return rule, true
+}
+
 func getEndpoint(rule *api_options.HttpRule) (string, string, string) {
 	var meth string
 	var path string
@@ -507,14 +763,272 @@ func generateEndpoint(gfile *protogen.GeneratedFile, serviceName string, methodN
 	path, meth, body := getEndpoint(rule)
 	gfile.P("Name:", fmt.Sprintf(`"%s.%s",`, serviceName, methodName))
 	gfile.P("Path:", fmt.Sprintf(`[]string{"%s"},`, path))
+	//if vmethod, ok := httpMethodMap[meth]; ok {
+	//	gfile.P("Method:", `[]string{`, httpPackage.Ident(vmethod), `},`)
+	//} else {
 	gfile.P("Method:", fmt.Sprintf(`[]string{"%s"},`, meth))
-	if len(rule.GetGet()) == 0 {
+	//	}
+	if len(rule.GetGet()) == 0 && body != "" {
 		gfile.P("Body:", fmt.Sprintf(`"%s",`, body))
 	}
 	if streaming {
 		gfile.P("Stream: true,")
 	}
 	gfile.P(`Handler: "rpc",`)
+}
 
+func (g *Generator) getGoIdentByXref(xref string) (protogen.GoIdent, error) {
+	idx := strings.LastIndex(xref, ".")
+	pkg := xref[:idx]
+	msg := xref[idx+1:]
+	for _, file := range g.plugin.Files {
+		if strings.Compare(pkg, *(file.Proto.Package)) != 0 {
+			continue
+		}
+		if ident, err := getGoIdentByMessage(file.Messages, msg); err == nil {
+			return ident, nil
+		}
+	}
+	return protogen.GoIdent{}, fmt.Errorf("not found")
+}
+
+func (g *Generator) getMessageByXref(xref string) (*protogen.Message, error) {
+	idx := strings.LastIndex(xref, ".")
+	pkg := xref[:idx]
+	msg := xref[idx+1:]
+	for _, file := range g.plugin.Files {
+		if strings.Compare(pkg, *(file.Proto.Package)) != 0 {
+			continue
+		}
+		if pmsg, err := getProtoMessage(file.Messages, msg); err == nil {
+			return pmsg, nil
+		}
+	}
+	return nil, fmt.Errorf("not found")
+}
+
+func getProtoMessage(messages []*protogen.Message, msg string) (*protogen.Message, error) {
+	for _, message := range messages {
+		if strings.Compare(msg, message.GoIdent.GoName) == 0 {
+			return message, nil
+		}
+		if len(message.Messages) > 0 {
+			if pmsg, err := getProtoMessage(message.Messages, msg); err == nil {
+				return pmsg, nil
+			}
+		}
+	}
+	return nil, fmt.Errorf("not found")
+}
+
+func getGoIdentByMessage(messages []*protogen.Message, msg string) (protogen.GoIdent, error) {
+	for _, message := range messages {
+		if strings.Compare(msg, message.GoIdent.GoName) == 0 {
+			return message.GoIdent, nil
+		}
+		if len(message.Messages) > 0 {
+			if ident, err := getGoIdentByMessage(message.Messages, msg); err == nil {
+				return ident, nil
+			}
+		}
+	}
+	return protogen.GoIdent{}, fmt.Errorf("not found")
+}
+
+func (g *Generator) generateServiceDesc(gfile *protogen.GeneratedFile, file *protogen.File, service *protogen.Service) {
+	serviceName := getServiceName(service)
+
+	gfile.P("// ", serviceName, "_ServiceDesc", " is the ", grpcPackage.Ident("ServiceDesc"), " for ", serviceName, " service.")
+	gfile.P("// It's only intended for direct use with ", grpcPackage.Ident("RegisterService"), ",")
+	gfile.P("// and not to be introspected or modified (even as a copy)")
+	gfile.P("var ", serviceName, "_ServiceDesc", " = ", grpcPackage.Ident("ServiceDesc"), " {")
+	gfile.P("ServiceName: ", strconv.Quote(string(service.Desc.FullName())), ",")
+	gfile.P("HandlerType: (*", serviceName, "Server)(nil),")
+	gfile.P("Methods: []", grpcPackage.Ident("MethodDesc"), "{")
+	for _, method := range service.Methods {
+		if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
+			continue
+		}
+		gfile.P("{")
+		gfile.P("MethodName: ", strconv.Quote(string(method.Desc.Name())), ",")
+		gfile.P("Handler: ", method.GoName, ",")
+		gfile.P("},")
+	}
+	gfile.P("},")
+	gfile.P("Streams: []", grpcPackage.Ident("StreamDesc"), "{")
+	for _, method := range service.Methods {
+		if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
+			continue
+		}
+		gfile.P("{")
+		gfile.P("StreamName: ", strconv.Quote(string(method.Desc.Name())), ",")
+		gfile.P("Handler: ", method.GoName, ",")
+		if method.Desc.IsStreamingServer() {
+			gfile.P("ServerStreams: true,")
+		}
+		if method.Desc.IsStreamingClient() {
+			gfile.P("ClientStreams: true,")
+		}
+		gfile.P("},")
+	}
+	gfile.P("},")
+	gfile.P("Metadata: \"", file.Desc.Path(), "\",")
+	gfile.P("}")
+	gfile.P()
+}
+
+func (g *Generator) generateServiceName(gfile *protogen.GeneratedFile, service *protogen.Service) {
+	serviceName := getServiceName(service)
+	gfile.P("var (")
+	gfile.P(serviceName, "Name", "=", `"`, serviceName, `"`)
+	gfile.P(")")
+}
+
+func (g *Generator) generateServiceEndpoints(gfile *protogen.GeneratedFile, service *protogen.Service, component string) {
+	if component != "http" {
 		return
 	}
+	serviceName := getServiceName(service)
+
+	gfile.P("var (")
+	gfile.P(serviceName, "ServerEndpoints = []", microServerHttpPackage.Ident("EndpointMetadata"), "{")
+
+	for _, method := range service.Methods {
+		if proto.HasExtension(method.Desc.Options(), api_options.E_Http) {
+			if endpoints, streaming := generateEndpoints(method); endpoints != nil {
+				for _, ep := range endpoints {
+					epath, emethod, ebody := getEndpoint(ep)
+					gfile.P("{")
+					gfile.P(`Name: "`, serviceName+"."+method.GoName, `",`)
+					gfile.P(`Path: "`, epath, `",`)
+					gfile.P(`Method: "`, emethod, `",`)
+					gfile.P(`Body: "`, ebody, `",`)
+					gfile.P(`Stream: `, streaming, `,`)
+					gfile.P("},")
+				}
+			}
+		}
+	}
+
+	gfile.P("}")
+	gfile.P(")")
+}
+
+func getServiceName(s *protogen.Service) string {
+	if strings.HasSuffix(s.GoName, "Service") {
+		return s.GoName
+	}
+	return s.GoName + "Service"
+}
+
+func (g *Generator) writeErrors(plugin *protogen.Plugin) error {
+	errorsMap := make(map[string]struct{})
+
+	for _, file := range plugin.Files {
+		for _, service := range file.Services {
+			for _, method := range service.Methods {
+				if method.Desc.Options() != nil {
+					if proto.HasExtension(method.Desc.Options(), v2.E_Openapiv2Operation) {
+						opts := proto.GetExtension(method.Desc.Options(), v2.E_Openapiv2Operation)
+						if opts != nil {
+							r := opts.(*v2.Operation)
+							if r.Responses == nil {
+								continue
+							}
+
+							for _, rsp := range r.Responses.ResponseCode {
+								if schema := rsp.Value.GetJsonReference(); schema != nil {
+									xref := schema.XRef
+									if xref[0] == '.' {
+										xref = xref[1:]
+									}
+									errorsMap[xref] = struct{}{}
+								}
+							}
+						}
+					}
+					if proto.HasExtension(method.Desc.Options(), v3.E_Openapiv3Operation) {
+						opts := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+						if opts != nil {
+							r := opts.(*v3.Operation)
+							if r.Responses == nil {
+								continue
+							}
+							resps := r.Responses.ResponseOrReference
+							if r.Responses.GetDefault() != nil {
+								resps = append(resps, &v3.NamedResponseOrReference{Name: "default", Value: r.Responses.GetDefault()})
+							}
+							for _, rsp := range resps {
+								if schema := rsp.Value.GetReference(); schema != nil {
+									xref := schema.XRef
+									if xref[0] == '.' {
+										xref = xref[1:]
+									}
+									errorsMap[xref] = struct{}{}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
+	var gfile *protogen.GeneratedFile
+	var importPath protogen.GoImportPath
+
+	if len(errorsMap) > 0 {
+
+		var packageName string
+
+		for _, file := range plugin.Files {
+			if !file.Generate {
+				continue
+			}
+			if len(file.Services) == 0 {
+				continue
+			}
+			packageName = string(file.GoPackageName)
+			importPath = file.GoImportPath
+			break
+		}
+
+		if g.standalone {
+			importPath = "."
+		}
+
+		gfile = plugin.NewGeneratedFile("micro_errors.pb.go", importPath)
+
+		gfile.P("// Code generated by protoc-gen-go-micro. DO NOT EDIT.")
+		gfile.P("// protoc-gen-go-micro version: " + versionComment)
+		gfile.P()
+		gfile.P("package ", packageName)
+		gfile.P()
+
+		gfile.Import(protojsonPackage)
+
+		gfile.P("var (")
+		gfile.P("marshaler = ", protojsonPackage.Ident("MarshalOptions"), "{}")
+		gfile.P(")")
+	}
+
+	for xref := range errorsMap {
+		msg, err := g.getMessageByXref(xref)
+		if err != nil {
+			return err
+		}
+
+		for _, field := range msg.Fields {
+			if field.GoName == "Error" {
+				return fmt.Errorf("failed generate Error() string interface for %s message %s already have Error field", field.Location.SourceFile, msg.Desc.Name())
+			}
+		}
+		gfile.P(`func (m *`, msg.GoIdent.GoName, `) Error() string {`)
+		gfile.P(`buf, _ := marshaler.Marshal(m)`)
+		gfile.P("return string(buf)")
+		gfile.P(`}`)
+		// log.Printf("xref %#+v %v\n", msg.GoIdent.GoName, err)
+	}
+
+	return nil
+}

variables.go

@@ -0,0 +1,27 @@
+package main
+
+import "google.golang.org/protobuf/compiler/protogen"
+
+var (
+	reflectPackage         = protogen.GoImportPath("reflect")
+	stringsPackage         = protogen.GoImportPath("strings")
+	fmtPackage             = protogen.GoImportPath("fmt")
+	contextPackage         = protogen.GoImportPath("context")
+	httpPackage            = protogen.GoImportPath("net/http")
+	gorillaMuxPackage      = protogen.GoImportPath("github.com/gorilla/mux")
+	chiPackage             = protogen.GoImportPath("github.com/go-chi/chi/v5")
+	chiMiddlewarePackage   = protogen.GoImportPath("github.com/go-chi/chi/v5/middleware")
+	microMetadataPackage   = protogen.GoImportPath("go.unistack.org/micro/v4/metadata")
+	microClientPackage     = protogen.GoImportPath("go.unistack.org/micro/v4/client")
+	microServerPackage     = protogen.GoImportPath("go.unistack.org/micro/v4/server")
+	microClientHttpPackage = protogen.GoImportPath("go.unistack.org/micro-client-http/v4")
+	microServerHttpPackage = protogen.GoImportPath("go.unistack.org/micro-server-http/v4")
+	microCodecPackage      = protogen.GoImportPath("go.unistack.org/micro-proto/v4/codec")
+	microErrorsPackage     = protogen.GoImportPath("go.unistack.org/micro/v4/errors")
+	microOptionsPackage    = protogen.GoImportPath("go.unistack.org/micro/v4/options")
+	grpcPackage            = protogen.GoImportPath("google.golang.org/grpc")
+	protojsonPackage       = protogen.GoImportPath("google.golang.org/protobuf/encoding/protojson")
+	timePackage            = protogen.GoImportPath("time")
+	deprecationComment     = "// Deprecated: Do not use."
+	versionComment         = "v4.0.2"
+)