add support for cookie and header variables

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.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/codeql-analysis.yml

@@ -0,0 +1,75 @@
+# 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 ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master ]
+  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 repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      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@v1
+
+    # 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: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,66 @@
+name: "prautomerge"
+
+on:
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  Dependabot-Automerge:
+    runs-on: ubuntu-latest
+    # Contains workaround to execute if dependabot updates the PR by checking for the base branch in the linked PR
+    # The the github.event.workflow_run.event value is 'push' and not 'pull_request'
+    # dont work with multiple workflows when last returns success
+    if: >-
+      github.event.workflow_run.conclusion == 'success'
+      && github.actor == 'dependabot[bot]'
+      && github.event.sender.login == 'dependabot[bot]'
+      && github.event.sender.type == 'Bot'
+      && (github.event.workflow_run.event == 'pull_request'
+          || (github.event.workflow_run.event == 'push' && github.event.workflow_run.pull_requests[0].base.ref == github.event.repository.default_branch ))
+    steps:
+      - name: Approve Changes and Merge changes if label 'dependencies' is set
+        uses: actions/github-script@v5
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          script: |
+            console.log(context.payload.workflow_run);
+            
+            var labelNames = await github.paginate(
+              github.issues.listLabelsOnIssue,
+              {
+                repo: context.repo.repo,
+                owner: context.repo.owner,
+                issue_number: context.payload.workflow_run.pull_requests[0].number,
+              },
+              (response) => response.data.map(
+                (label) => label.name
+              )
+            );
+
+            console.log(labelNames);
+
+            if (labelNames.includes('dependencies')) {
+              console.log('Found label');
+
+              await github.pulls.createReview({
+                repo: context.repo.repo,
+                owner: context.repo.owner,
+                pull_number: context.payload.workflow_run.pull_requests[0].number,
+                event: 'APPROVE'
+              });
+              console.log('Approved PR');
+
+              await github.pulls.merge({
+                repo: context.repo.repo,
+                owner: context.repo.owner,
+                pull_number: context.payload.workflow_run.pull_requests[0].number,
+              });
+
+              console.log('Merged PR');
+            }

.gitignore

@@ -34,5 +34,5 @@ _cgo_export.*
 *~
 *.swp
 *.swo
-/protoc-gen-micro
+/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/v3`

ast.go

@@ -10,46 +10,63 @@ import (
 	"strings"
 
 	"github.com/fatih/structtag"
-	tag_options "github.com/unistack-org/micro-proto/tag"
+	tag_options "go.unistack.org/micro-proto/v3/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
-)
+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 {
-			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 := 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
-				}
+			if err := g.astFill(file, message); err != nil {
+				return err
 			}
 		}
 	}

chi.go

@@ -30,7 +30,9 @@ func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error
 		}
 		gfile := plugin.NewGeneratedFile(gname, path)
 
-		gfile.P("// Code generated by protoc-gen-micro")
+		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()
 

example/example.proto

@@ -0,0 +1,44 @@
+syntax = "proto3";
+
+package example;
+
+option go_package = "github.com/unistack-org/protoc-gen-go-micro/v3/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: 5; };
+  };
+};
+
+message CallReq {
+  string name = 1 [(micro.tag.tags) = "xml:\",attr\"" ];
+  string req = 2;
+};
+
+message CallRsp {
+  string rsp = 2;
+};
+
+message Error {
+	string msg = 1;
+};

go.mod

@@ -1,12 +1,13 @@
-module github.com/unistack-org/protoc-gen-micro/v3
+module go.unistack.org/protoc-gen-go-micro/v3
 
 go 1.16
 
 require (
 	github.com/fatih/structtag v1.2.0
-	github.com/unistack-org/micro-proto v0.0.2
+	go.unistack.org/micro-proto/v3 v3.1.0
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/protobuf v1.26.0
+	google.golang.org/protobuf v1.27.1
 )
 
-//replace github.com/unistack-org/micro-proto => ../micro-proto
+//replace go.unistack.org/micro/v3 => ../micro
+//replace go.unistack.org/micro-proto => ../micro-proto

go.sum

@@ -1,75 +1,13 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
 github.com/fatih/structtag v1.2.0/go.mod h1:mBJUNpUnHmRKrKlQQlmCrh5PuhftFbNv8Ys4/aAZl94=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
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-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
-golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
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+go.unistack.org/micro-proto/v3 v3.1.0 h1:q39FwjFiRZn+Ux/tt+d3bJTmDtsQQWa+3SLYVo1vLfA=
+go.unistack.org/micro-proto/v3 v3.1.0/go.mod h1:DpRhYCBXlmSJ/AAXTmntvlh7kQkYU6eFvlmYAx4BQS8=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
-google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
-google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
-google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
-google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
-google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-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=
-google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
-google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
-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 v1.25.0/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 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
-google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=

gorilla.go

@@ -30,7 +30,9 @@ func (g *Generator) gorillaGenerate(component string, plugin *protogen.Plugin) e
 		}
 		gfile := plugin.NewGeneratedFile(gname, path)
 
-		gfile.P("// Code generated by protoc-gen-micro")
+		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()
 

http.go

@@ -20,13 +20,16 @@ func (g *Generator) httpGenerate(component string, plugin *protogen.Plugin, genC
 		}
 		gfile := plugin.NewGeneratedFile(gname, path)
 
-		gfile.P("// Code generated by protoc-gen-micro")
+		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)

main.go

@@ -10,10 +10,12 @@ import (
 )
 
 var (
-	flagDebug      = flag.Bool("debug", false, "")
-	flagStandalone = flag.Bool("standalone", false, "")
-	flagComponents = flag.String("components", "micro|rpc|http|client|server", "")
-	flagTagPath    = flag.String("tag_path", ".", "")
+	flagDebug       = flag.Bool("debug", false, "debug output")
+	flagStandalone  = flag.Bool("standalone", false, "generate file to standalone dir")
+	flagComponents  = flag.String("components", "micro|rpc|http|client|server|openapiv3", "specify components to generate")
+	flagTagPath     = flag.String("tag_path", "", "tag rewriting dir")
+	flagOpenapiFile = flag.String("openapi_file", "apidocs.swagger.json", "openapi file name")
+	flagHelp        = flag.Bool("help", false, "display help message")
 )
 
 func main() {
@@ -21,16 +23,24 @@ func main() {
 		ParamFunc: flag.CommandLine.Set,
 	}
 
+	flag.Parse()
+
+	if *flagHelp {
+		flag.PrintDefaults()
+		return
+	}
+
 	g := &Generator{}
 
 	opts.Run(g.Generate)
 }
 
 type Generator struct {
-	components string
-	standalone bool
-	debug      bool
-	tagPath    string
+	components  string
+	standalone  bool
+	debug       bool
+	tagPath     string
+	openapiFile string
 }
 
 func (g *Generator) Generate(plugin *protogen.Plugin) error {
@@ -40,6 +50,7 @@ func (g *Generator) Generate(plugin *protogen.Plugin) error {
 	g.debug = *flagDebug
 	g.components = *flagComponents
 	g.tagPath = *flagTagPath
+	g.openapiFile = *flagOpenapiFile
 	plugin.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL)
 
 	var genClient bool
@@ -73,6 +84,8 @@ func (g *Generator) Generate(plugin *protogen.Plugin) error {
 			err = g.gorillaGenerate(component, plugin)
 		case "chi":
 			err = g.chiGenerate(component, plugin)
+		case "openapiv3":
+			err = g.openapiv3Generate(component, plugin)
 		default:
 			err = fmt.Errorf("unknown component: %s", component)
 		}

micro.go

@@ -21,8 +21,10 @@ func (g *Generator) microGenerate(component string, plugin *protogen.Plugin, gen
 		}
 		gfile := plugin.NewGeneratedFile(gname, path)
 
-		gfile.P("// Code generated by protoc-gen-micro")
+		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()
 

openapiv3.go

@@ -0,0 +1,673 @@
+// Copyright 2020 Google LLC. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"regexp"
+	"sort"
+	"strings"
+
+	annotations "go.unistack.org/micro-proto/v3/api"
+	v3 "go.unistack.org/micro-proto/v3/openapiv3"
+	"google.golang.org/protobuf/compiler/protogen"
+	jsonpb "google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type openapiv3Generator struct {
+	plugin *protogen.Plugin
+
+	requiredSchemas   []string // Names of schemas that need to be generated.
+	generatedSchemas  []string // Names of schemas that have already been generated.
+	linterRulePattern *regexp.Regexp
+	namePattern       *regexp.Regexp
+}
+
+func (g *Generator) openapiv3Generate(component string, plugin *protogen.Plugin) error {
+	og := &openapiv3Generator{
+		plugin:            plugin,
+		requiredSchemas:   make([]string, 0),
+		generatedSchemas:  make([]string, 0),
+		linterRulePattern: regexp.MustCompile(`\(-- .* --\)`),
+		namePattern:       regexp.MustCompile("{(.*)=(.*)}"),
+	}
+
+	d := og.buildDocumentV3(plugin)
+
+	bytes, err := (jsonpb.MarshalOptions{Indent: "  "}).Marshal(d)
+	if err != nil {
+		return fmt.Errorf("failed to marshal: %s", err.Error())
+	}
+
+	outputFile := og.plugin.NewGeneratedFile(g.openapiFile, "")
+	if _, err := outputFile.Write(bytes); err != nil {
+		return fmt.Errorf("failed to write: %s", err.Error())
+	}
+
+	return nil
+}
+
+// buildDocumentV3 builds an OpenAPIv3 document for a plugin request.
+func (g *openapiv3Generator) buildDocumentV3(plugin *protogen.Plugin) *v3.Document {
+	d := &v3.Document{}
+	d.Openapi = "3.0.3"
+	d.Info = &v3.Info{
+		Title:       "",
+		Version:     "0.0.1",
+		Description: "",
+	}
+
+	for _, file := range plugin.Files {
+		if !proto.HasExtension(file.Desc.Options(), v3.E_Openapiv3Swagger) {
+			continue
+		}
+
+		ext := proto.GetExtension(file.Desc.Options(), v3.E_Openapiv3Swagger)
+		if ext == nil {
+			continue
+		}
+
+		if doc, ok := ext.(*v3.Document); ok && doc != nil {
+			if doc.Openapi != "" {
+				d.Openapi = doc.Openapi
+			}
+			d.Info = proto.Clone(doc.Info).(*v3.Info)
+			d.Servers = append(d.Servers, doc.Servers...)
+		}
+
+	}
+
+	d.Paths = &v3.Paths{}
+	d.Components = &v3.Components{
+		Schemas: &v3.SchemasOrReferences{
+			AdditionalProperties: []*v3.NamedSchemaOrReference{},
+		},
+	}
+	for _, file := range g.plugin.Files {
+		g.addPathsToDocumentV3(d, file)
+	}
+	for len(g.requiredSchemas) > 0 {
+		count := len(g.requiredSchemas)
+		for _, file := range g.plugin.Files {
+			g.addSchemasToDocumentV3(d, file)
+		}
+		g.requiredSchemas = g.requiredSchemas[count:len(g.requiredSchemas)]
+	}
+	// Sort the paths.
+	{
+		pairs := d.Paths.Path
+		sort.Slice(pairs, func(i, j int) bool {
+			return pairs[i].Name < pairs[j].Name
+		})
+		d.Paths.Path = pairs
+	}
+	// Sort the schemas.
+	{
+		pairs := d.Components.Schemas.AdditionalProperties
+		sort.Slice(pairs, func(i, j int) bool {
+			return pairs[i].Name < pairs[j].Name
+		})
+		d.Components.Schemas.AdditionalProperties = pairs
+	}
+	return d
+}
+
+// filterCommentString removes line breaks and linter rules from comments.
+func (g *openapiv3Generator) filterCommentString(c protogen.Comments) string {
+	comment := string(c)
+	comment = strings.Replace(comment, "\n", "", -1)
+	comment = g.linterRulePattern.ReplaceAllString(comment, "")
+	return strings.TrimSpace(comment)
+}
+
+// addPathsToDocumentV3 adds paths from a specified file descriptor.
+func (g *openapiv3Generator) addPathsToDocumentV3(d *v3.Document, file *protogen.File) {
+	for _, service := range file.Services {
+		comment := g.filterCommentString(service.Comments.Leading)
+		if d.Info.Title == "" {
+			d.Info.Title = service.GoName
+		}
+		if d.Info.Description == "" {
+			d.Info.Description = comment
+		}
+		for _, method := range service.Methods {
+			comment := g.filterCommentString(method.Comments.Leading)
+			inputMessage := method.Input
+			outputMessage := method.Output
+			operationID := service.GoName + "_" + method.GoName
+			eopt := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+			if eopt != nil && eopt != v3.E_Openapiv3Operation.InterfaceOf(v3.E_Openapiv3Operation.Zero()) {
+				opt := eopt.(*v3.Operation)
+				if opt.OperationId != "" {
+					operationID = opt.OperationId
+				}
+			}
+			xt := annotations.E_Http
+			extension := proto.GetExtension(method.Desc.Options(), xt)
+			var path string
+			var methodName string
+			var body string
+			if extension != nil && extension != xt.InterfaceOf(xt.Zero()) {
+				rule := extension.(*annotations.HttpRule)
+				body = rule.Body
+				switch pattern := rule.Pattern.(type) {
+				case *annotations.HttpRule_Get:
+					path = pattern.Get
+					methodName = "GET"
+				case *annotations.HttpRule_Post:
+					path = pattern.Post
+					methodName = "POST"
+				case *annotations.HttpRule_Put:
+					path = pattern.Put
+					methodName = "PUT"
+				case *annotations.HttpRule_Delete:
+					path = pattern.Delete
+					methodName = "DELETE"
+				case *annotations.HttpRule_Patch:
+					path = pattern.Patch
+					methodName = "PATCH"
+				case *annotations.HttpRule_Custom:
+					path = "custom-unsupported"
+				default:
+					path = "unknown-unsupported"
+				}
+			}
+			if methodName != "" {
+				op, path2 := g.buildOperationV3(
+					file, method, operationID, comment, path, body, inputMessage, outputMessage)
+				g.addOperationV3(d, op, path2, methodName)
+			}
+		}
+	}
+}
+
+// buildOperationV3 constructs an operation for a set of values.
+func (g *openapiv3Generator) buildOperationV3(
+	file *protogen.File,
+	method *protogen.Method,
+	operationID string,
+	description string,
+	path string,
+	bodyField string,
+	inputMessage *protogen.Message,
+	outputMessage *protogen.Message,
+) (*v3.Operation, string) {
+	// coveredParameters tracks the parameters that have been used in the body or path.
+	coveredParameters := make([]string, 0)
+	if bodyField != "" {
+		coveredParameters = append(coveredParameters, bodyField)
+	}
+	// Initialize the list of operation parameters.
+	parameters := []*v3.ParameterOrReference{}
+	// Build a list of header parameters.
+	eopt := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+	if eopt != nil && eopt != v3.E_Openapiv3Operation.InterfaceOf(v3.E_Openapiv3Operation.Zero()) {
+		opt := eopt.(*v3.Operation)
+		parameters = append(parameters, opt.Parameters...)
+	}
+
+	// Build a list of path parameters.
+	pathParameters := make([]string, 0)
+	if matches := g.namePattern.FindStringSubmatch(path); matches != nil {
+		// Add the "name=" "name" value to the list of covered parameters.
+		coveredParameters = append(coveredParameters, matches[1])
+		// Convert the path from the starred form to use named path parameters.
+		starredPath := matches[2]
+		parts := strings.Split(starredPath, "/")
+		// The starred path is assumed to be in the form "things/*/otherthings/*".
+		// We want to convert it to "things/{thing}/otherthings/{otherthing}".
+		for i := 0; i < len(parts)-1; i += 2 {
+			section := parts[i]
+			parameter := singular(section)
+			parts[i+1] = "{" + parameter + "}"
+			pathParameters = append(pathParameters, parameter)
+		}
+		// Rewrite the path to use the path parameters.
+		newPath := strings.Join(parts, "/")
+		path = strings.Replace(path, matches[0], newPath, 1)
+	}
+	// Add the path parameters to the operation parameters.
+	for _, pathParameter := range pathParameters {
+		parameters = append(parameters,
+			&v3.ParameterOrReference{
+				Oneof: &v3.ParameterOrReference_Parameter{
+					Parameter: &v3.Parameter{
+						Name:        pathParameter,
+						In:          "path",
+						Required:    true,
+						Description: "The " + pathParameter + " id.",
+						Schema: &v3.SchemaOrReference{
+							Oneof: &v3.SchemaOrReference_Schema{
+								Schema: &v3.Schema{
+									Type: "string",
+								},
+							},
+						},
+					},
+				},
+			})
+	}
+	// Add any unhandled fields in the request message as query parameters.
+	if bodyField != "*" {
+		for _, field := range inputMessage.Fields {
+			fieldName := string(field.Desc.Name())
+			if !contains(coveredParameters, fieldName) {
+				// Get the field description from the comments.
+				fieldDescription := g.filterCommentString(field.Comments.Leading)
+				parameters = append(parameters,
+					&v3.ParameterOrReference{
+						Oneof: &v3.ParameterOrReference_Parameter{
+							Parameter: &v3.Parameter{
+								Name:        fieldName,
+								In:          "query",
+								Description: fieldDescription,
+								Required:    false,
+								Schema: &v3.SchemaOrReference{
+									Oneof: &v3.SchemaOrReference_Schema{
+										Schema: &v3.Schema{
+											Type: "string",
+										},
+									},
+								},
+							},
+						},
+					})
+			}
+		}
+	}
+	// Create the response.
+	responses := &v3.Responses{
+		ResponseOrReference: []*v3.NamedResponseOrReference{
+			&v3.NamedResponseOrReference{
+				Name: "200",
+				Value: &v3.ResponseOrReference{
+					Oneof: &v3.ResponseOrReference_Response{
+						Response: &v3.Response{
+							Description: "OK",
+							Content:     g.responseContentForMessage(outputMessage),
+						},
+					},
+				},
+			},
+		},
+	}
+	// Create the operation.
+	op := &v3.Operation{
+		Summary:     description,
+		OperationId: operationID,
+		Parameters:  parameters,
+		Responses:   responses,
+	}
+	// If a body field is specified, we need to pass a message as the request body.
+	if bodyField != "" {
+		var bodyFieldScalarTypeName string
+		var bodyFieldMessageTypeName string
+		if bodyField == "*" {
+			// Pass the entire request message as the request body.
+			bodyFieldMessageTypeName = g.fullMessageTypeName(inputMessage)
+		} else {
+			// If body refers to a message field, use that type.
+			for _, field := range inputMessage.Fields {
+				if string(field.Desc.Name()) == bodyField {
+					switch field.Desc.Kind() {
+					case protoreflect.StringKind:
+						bodyFieldScalarTypeName = "string"
+					case protoreflect.MessageKind:
+						bodyFieldMessageTypeName = g.fullMessageTypeName(field.Message)
+					default:
+						log.Printf("unsupported field type %+v", field.Desc)
+					}
+					break
+				}
+			}
+		}
+		var requestSchema *v3.SchemaOrReference
+		if bodyFieldScalarTypeName != "" {
+			requestSchema = &v3.SchemaOrReference{
+				Oneof: &v3.SchemaOrReference_Schema{
+					Schema: &v3.Schema{
+						Type: bodyFieldScalarTypeName,
+					},
+				},
+			}
+		} else if bodyFieldMessageTypeName != "" {
+			requestSchema = &v3.SchemaOrReference{
+				Oneof: &v3.SchemaOrReference_Reference{
+					Reference: &v3.Reference{
+						XRef: g.schemaReferenceForTypeName(bodyFieldMessageTypeName),
+					},
+				},
+			}
+		}
+		op.RequestBody = &v3.RequestBodyOrReference{
+			Oneof: &v3.RequestBodyOrReference_RequestBody{
+				RequestBody: &v3.RequestBody{
+					Required: true,
+					Content: &v3.MediaTypes{
+						AdditionalProperties: []*v3.NamedMediaType{
+							&v3.NamedMediaType{
+								Name: "application/json",
+								Value: &v3.MediaType{
+									Schema: requestSchema,
+								},
+							},
+						},
+					},
+				},
+			},
+		}
+	}
+	return op, path
+}
+
+// addOperationV3 adds an operation to the specified path/method.
+func (g *openapiv3Generator) addOperationV3(d *v3.Document, op *v3.Operation, path string, methodName string) {
+	var selectedPathItem *v3.NamedPathItem
+	for _, namedPathItem := range d.Paths.Path {
+		if namedPathItem.Name == path {
+			selectedPathItem = namedPathItem
+			break
+		}
+	}
+	// If we get here, we need to create a path item.
+	if selectedPathItem == nil {
+		selectedPathItem = &v3.NamedPathItem{Name: path, Value: &v3.PathItem{}}
+		d.Paths.Path = append(d.Paths.Path, selectedPathItem)
+	}
+	// Set the operation on the specified method.
+	switch methodName {
+	case http.MethodGet:
+		selectedPathItem.Value.Get = op
+	case http.MethodPost:
+		selectedPathItem.Value.Post = op
+	case http.MethodPut:
+		selectedPathItem.Value.Put = op
+	case http.MethodDelete:
+		selectedPathItem.Value.Delete = op
+	case http.MethodPatch:
+		selectedPathItem.Value.Patch = op
+	}
+}
+
+// schemaReferenceForTypeName returns an OpenAPI JSON Reference to the schema that represents a type.
+func (g *openapiv3Generator) schemaReferenceForTypeName(typeName string) string {
+	if !contains(g.requiredSchemas, typeName) {
+		g.requiredSchemas = append(g.requiredSchemas, typeName)
+	}
+	parts := strings.Split(typeName, ".")
+	lastPart := parts[len(parts)-1]
+	return "#/components/schemas/" + lastPart
+}
+
+// itemsItemForTypeName is a helper constructor.
+func (g *openapiv3Generator) itemsItemForTypeName(typeName string) *v3.ItemsItem {
+	return &v3.ItemsItem{SchemaOrReference: []*v3.SchemaOrReference{&v3.SchemaOrReference{
+		Oneof: &v3.SchemaOrReference_Schema{
+			Schema: &v3.Schema{
+				Type: typeName,
+			},
+		},
+	}}}
+}
+
+// itemsItemForReference is a helper constructor.
+func (g *openapiv3Generator) itemsItemForReference(xref string) *v3.ItemsItem {
+	return &v3.ItemsItem{SchemaOrReference: []*v3.SchemaOrReference{&v3.SchemaOrReference{
+		Oneof: &v3.SchemaOrReference_Reference{
+			Reference: &v3.Reference{
+				XRef: xref,
+			},
+		},
+	}}}
+}
+
+// fullMessageTypeName builds the full type name of a message.
+func (g *openapiv3Generator) fullMessageTypeName(message *protogen.Message) string {
+	return "." + string(message.Desc.ParentFile().Package()) + "." + string(message.Desc.Name())
+}
+
+func (g *openapiv3Generator) responseContentForMessage(outputMessage *protogen.Message) *v3.MediaTypes {
+	typeName := g.fullMessageTypeName(outputMessage)
+
+	if typeName == ".google.protobuf.Empty" {
+		return &v3.MediaTypes{}
+	}
+
+	if typeName == ".google.api.HttpBody" || typeName == ".micro.codec.Frame" {
+		return &v3.MediaTypes{
+			AdditionalProperties: []*v3.NamedMediaType{
+				&v3.NamedMediaType{
+					Name:  "application/octet-stream",
+					Value: &v3.MediaType{},
+				},
+			},
+		}
+	}
+
+	return &v3.MediaTypes{
+		AdditionalProperties: []*v3.NamedMediaType{
+			&v3.NamedMediaType{
+				Name: "application/json",
+				Value: &v3.MediaType{
+					Schema: &v3.SchemaOrReference{
+						Oneof: &v3.SchemaOrReference_Reference{
+							Reference: &v3.Reference{
+								XRef: g.schemaReferenceForTypeName(g.fullMessageTypeName(outputMessage)),
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+// addSchemasToDocumentV3 adds info from one file descriptor.
+func (g *openapiv3Generator) addSchemasToDocumentV3(d *v3.Document, file *protogen.File) {
+	// For each message, generate a definition.
+	for _, message := range file.Messages {
+		typeName := g.fullMessageTypeName(message)
+		// Only generate this if we need it and haven't already generated it.
+		if !contains(g.requiredSchemas, typeName) ||
+			contains(g.generatedSchemas, typeName) {
+			continue
+		}
+		g.generatedSchemas = append(g.generatedSchemas, typeName)
+		// Get the message description from the comments.
+		messageDescription := g.filterCommentString(message.Comments.Leading)
+		// Build an array holding the fields of the message.
+		definitionProperties := &v3.Properties{
+			AdditionalProperties: make([]*v3.NamedSchemaOrReference, 0),
+		}
+		for _, field := range message.Fields {
+			// Check the field annotations to see if this is a readonly field.
+			outputOnly := false
+			extension := proto.GetExtension(field.Desc.Options(), annotations.E_FieldBehavior)
+			if extension != nil {
+				switch v := extension.(type) {
+				case []annotations.FieldBehavior:
+					for _, vv := range v {
+						if vv == annotations.FieldBehavior_OUTPUT_ONLY {
+							outputOnly = true
+						}
+					}
+				default:
+					log.Printf("unsupported extension type %T", extension)
+				}
+			}
+			// Get the field description from the comments.
+			fieldDescription := g.filterCommentString(field.Comments.Leading)
+			// The field is either described by a reference or a schema.
+			XRef := ""
+			fieldSchema := &v3.Schema{
+				Description: fieldDescription,
+			}
+			if outputOnly {
+				fieldSchema.ReadOnly = true
+			}
+			if field.Desc.IsList() {
+				fieldSchema.Type = "array"
+				switch field.Desc.Kind() {
+				case protoreflect.MessageKind:
+					fieldSchema.Items = g.itemsItemForReference(
+						g.schemaReferenceForTypeName(
+							g.fullMessageTypeName(field.Message)))
+				case protoreflect.StringKind:
+					fieldSchema.Items = g.itemsItemForTypeName("string")
+				case protoreflect.Int32Kind,
+					protoreflect.Sint32Kind,
+					protoreflect.Uint32Kind,
+					protoreflect.Int64Kind,
+					protoreflect.Sint64Kind,
+					protoreflect.Uint64Kind,
+					protoreflect.Sfixed32Kind,
+					protoreflect.Fixed32Kind,
+					protoreflect.Sfixed64Kind,
+					protoreflect.Fixed64Kind:
+					fieldSchema.Items = g.itemsItemForTypeName("integer")
+				case protoreflect.EnumKind:
+					fieldSchema.Items = g.itemsItemForTypeName("integer")
+				case protoreflect.BoolKind:
+					fieldSchema.Items = g.itemsItemForTypeName("boolean")
+				case protoreflect.FloatKind, protoreflect.DoubleKind:
+					fieldSchema.Items = g.itemsItemForTypeName("number")
+				case protoreflect.BytesKind:
+					fieldSchema.Items = g.itemsItemForTypeName("string")
+				default:
+					log.Printf("(TODO) Unsupported array type: %+v", g.fullMessageTypeName(field.Message))
+				}
+			} else if field.Desc.IsMap() &&
+				field.Desc.MapKey().Kind() == protoreflect.StringKind &&
+				field.Desc.MapValue().Kind() == protoreflect.StringKind {
+				fieldSchema.Type = "object"
+			} else {
+				k := field.Desc.Kind()
+				switch k {
+				case protoreflect.MessageKind:
+					typeName := g.fullMessageTypeName(field.Message)
+					switch typeName {
+					case ".google.protobuf.Timestamp":
+						// Timestamps are serialized as strings
+						fieldSchema.Type = "string"
+						fieldSchema.Format = "RFC3339"
+					case ".google.type.Date":
+						// Dates are serialized as strings
+						fieldSchema.Type = "string"
+						fieldSchema.Format = "date"
+					case ".google.type.DateTime":
+						// DateTimes are serialized as strings
+						fieldSchema.Type = "string"
+						fieldSchema.Format = "date-time"
+					default:
+						// The field is described by a reference.
+						XRef = g.schemaReferenceForTypeName(typeName)
+					}
+				case protoreflect.StringKind:
+					fieldSchema.Type = "string"
+				case protoreflect.Int32Kind,
+					protoreflect.Sint32Kind,
+					protoreflect.Uint32Kind,
+					protoreflect.Int64Kind,
+					protoreflect.Sint64Kind,
+					protoreflect.Uint64Kind,
+					protoreflect.Sfixed32Kind,
+					protoreflect.Fixed32Kind,
+					protoreflect.Sfixed64Kind,
+					protoreflect.Fixed64Kind:
+					fieldSchema.Type = "integer"
+					fieldSchema.Format = k.String()
+				case protoreflect.EnumKind:
+					fieldSchema.Type = "integer"
+					fieldSchema.Format = "enum"
+				case protoreflect.BoolKind:
+					fieldSchema.Type = "boolean"
+				case protoreflect.FloatKind, protoreflect.DoubleKind:
+					fieldSchema.Type = "number"
+					fieldSchema.Format = k.String()
+				case protoreflect.BytesKind:
+					fieldSchema.Type = "string"
+					fieldSchema.Format = "bytes"
+				default:
+					log.Printf("(TODO) Unsupported field type: %+v", g.fullMessageTypeName(field.Message))
+				}
+			}
+			var value *v3.SchemaOrReference
+			if XRef != "" {
+				value = &v3.SchemaOrReference{
+					Oneof: &v3.SchemaOrReference_Reference{
+						Reference: &v3.Reference{
+							XRef: XRef,
+						},
+					},
+				}
+			} else {
+				value = &v3.SchemaOrReference{
+					Oneof: &v3.SchemaOrReference_Schema{
+						Schema: fieldSchema,
+					},
+				}
+			}
+			definitionProperties.AdditionalProperties = append(
+				definitionProperties.AdditionalProperties,
+				&v3.NamedSchemaOrReference{
+					Name:  string(field.Desc.Name()),
+					Value: value,
+				},
+			)
+		}
+		// Add the schema to the components.schema list.
+		d.Components.Schemas.AdditionalProperties = append(d.Components.Schemas.AdditionalProperties,
+			&v3.NamedSchemaOrReference{
+				Name: string(message.Desc.Name()),
+				Value: &v3.SchemaOrReference{
+					Oneof: &v3.SchemaOrReference_Schema{
+						Schema: &v3.Schema{
+							Description: messageDescription,
+							Properties:  definitionProperties,
+						},
+					},
+				},
+			},
+		)
+	}
+}
+
+// contains returns true if an array contains a specified string.
+func contains(s []string, e string) bool {
+	for _, a := range s {
+		if a == e {
+			return true
+		}
+	}
+	return false
+}
+
+// singular produces the singular form of a collection name.
+func singular(plural string) string {
+	if strings.HasSuffix(plural, "ves") {
+		return strings.TrimSuffix(plural, "ves") + "f"
+	}
+	if strings.HasSuffix(plural, "ies") {
+		return strings.TrimSuffix(plural, "ies") + "y"
+	}
+	if strings.HasSuffix(plural, "s") {
+		return strings.TrimSuffix(plural, "s")
+	}
+	return plural
+}

rpc.go

@@ -20,8 +20,10 @@ func (g *Generator) rpcGenerate(component string, plugin *protogen.Plugin, genCl
 		}
 		gfile := plugin.NewGeneratedFile(gname, path)
 
-		gfile.P("// Code generated by protoc-gen-micro")
+		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()
 

util.go

@@ -2,27 +2,27 @@ package main
 
 import (
 	"fmt"
+	"net/http"
 	"strings"
 
-	api_options "github.com/unistack-org/micro-proto/api"
-	openapiv2_options "github.com/unistack-org/micro-proto/openapiv2"
+	api_options "go.unistack.org/micro-proto/v3/api"
+	v2 "go.unistack.org/micro-proto/v3/openapiv2"
+	v3 "go.unistack.org/micro-proto/v3/openapiv3"
 	"google.golang.org/protobuf/compiler/protogen"
 	"google.golang.org/protobuf/proto"
 )
 
-var (
-	httpMethodMap = map[string]string{
-		"GET":     "MethodGet",
-		"HEAD":    "MethodHead",
-		"POST":    "MethodPost",
-		"PUT":     "MethodPut",
-		"PATCH":   "MethodPatch",
-		"DELETE":  "MethodDelete",
-		"CONNECT": "MethodConnect",
-		"OPTIONS": "MethodOptions",
-		"TRACE":   "MethodTrace",
-	}
-)
+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:]
@@ -30,7 +30,7 @@ func unexport(s string) string {
 
 func generateServiceClient(gfile *protogen.GeneratedFile, service *protogen.Service) {
 	serviceName := service.GoName
-	//if rule, ok := getMicroApiService(service); ok {
+	// if rule, ok := getMicroApiService(service); ok {
 	//		gfile.P("// client wrappers ", strings.Join(rule.ClientWrappers, ", "))
 	//	}
 	gfile.P("type ", unexport(serviceName), "Client struct {")
@@ -51,26 +51,30 @@ func generateServiceClientMethods(gfile *protogen.GeneratedFile, service *protog
 		generateClientFuncSignature(gfile, serviceName, method)
 
 		if http && method.Desc.Options() != nil {
-			if proto.HasExtension(method.Desc.Options(), openapiv2_options.E_Openapiv2Operation) {
-				opts := proto.GetExtension(method.Desc.Options(), openapiv2_options.E_Openapiv2Operation)
+			if proto.HasExtension(method.Desc.Options(), v2.E_Openapiv2Operation) {
+				opts := proto.GetExtension(method.Desc.Options(), v2.E_Openapiv2Operation)
 				if opts != nil {
-					r := opts.(*openapiv2_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
+					r := opts.(*v2.Operation)
+					gfile.P("errmap := make(map[string]interface{}, ", len(r.Responses.ResponseCode), ")")
+					for _, rsp := range r.Responses.ResponseCode {
+						if schema := rsp.Value.GetJsonReference(); schema != nil {
+							ref := schema.XRef
 							if strings.HasPrefix(ref, "."+string(service.Desc.ParentFile().Package())+".") {
 								ref = strings.TrimPrefix(ref, "."+string(service.Desc.ParentFile().Package())+".")
 							}
-							gfile.P(`errmap["`, code, `"] = &`, ref, "{}")
+							if ref == "micro.codec.Frame" || ref == ".micro.codec.Frame" {
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, microCodecPackage.Ident("Frame"), "{}")
+							} else {
+								gfile.P(`errmap["`, rsp.Name, `"] = &`, ref, "{}")
+							}
 						}
 					}
 				}
-
 				gfile.P("opts = append(opts,")
 				gfile.P(microClientHttpPackage.Ident("ErrorMap"), "(errmap),")
 				gfile.P(")")
 			}
+
 			if proto.HasExtension(method.Desc.Options(), api_options.E_Http) {
 				gfile.P("opts = append(opts,")
 				endpoints, _ := generateEndpoints(method)
@@ -86,7 +90,42 @@ func generateServiceClientMethods(gfile *protogen.GeneratedFile, service *protog
 				}
 				gfile.P(")")
 			}
+
+			parameters := make(map[string]map[string]string)
+			// Build a list of header parameters.
+			eopt := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+			if eopt != nil && eopt != v3.E_Openapiv3Operation.InterfaceOf(v3.E_Openapiv3Operation.Zero()) {
+				opt := eopt.(*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 > 0 {
 				gfile.P("opts = append(opts, ", microClientPackage.Ident("WithRequestTimeout"), "(", timePackage.Ident("Second"), "*", rule.Timeout, "))")
@@ -207,6 +246,39 @@ func generateServiceServerMethods(gfile *protogen.GeneratedFile, service *protog
 				gfile.P("return h.", serviceName, "Server.", method.GoName, "(ctx, &", unexport(serviceName), method.GoName, "Stream{stream})")
 			}
 		} else {
+			parameters := make(map[string]map[string]string)
+			// Build a list of header parameters.
+			eopt := proto.GetExtension(method.Desc.Options(), v3.E_Openapiv3Operation)
+			if eopt != nil && eopt != v3.E_Openapiv3Operation.InterfaceOf(v3.E_Openapiv3Operation.Zero()) {
+				opt := eopt.(*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"), `(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("}")
@@ -284,8 +356,8 @@ func generateServiceRegister(gfile *protogen.GeneratedFile, service *protogen.Se
 	gfile.P("}")
 	gfile.P("h := &", unexport(serviceName), "Server{sh}")
 	gfile.P("var nopts []", microServerPackage.Ident("HandlerOption"))
-	gfile.P("for _, endpoint := range New", serviceName, "Endpoints() {")
-	gfile.P("nopts = append(nopts, ", microApiPackage.Ident("WithEndpoint"), "(endpoint))")
+	gfile.P("for _, endpoint := range ", serviceName, "Endpoints {")
+	gfile.P("nopts = append(nopts, ", microApiPackage.Ident("WithEndpoint"), "(&endpoint))")
 	gfile.P("}")
 	gfile.P("return s.Handle(s.NewHandler(&", serviceName, "{h}, append(nopts, opts...)...))")
 	gfile.P("}")
@@ -448,8 +520,10 @@ func generateServiceServerStreamInterface(gfile *protogen.GeneratedFile, service
 
 func generateServiceEndpoints(gfile *protogen.GeneratedFile, service *protogen.Service) {
 	serviceName := service.GoName
-	gfile.P("func New", serviceName, "Endpoints() []*", microApiPackage.Ident("Endpoint"), " {")
-	gfile.P("return []*", microApiPackage.Ident("Endpoint"), "{")
+	gfile.P("var (")
+	gfile.P(serviceName, "Name", "=", `"`, serviceName, `"`)
+	gfile.P()
+	gfile.P(serviceName, "Endpoints", "=", "[]", microApiPackage.Ident("Endpoint"), "{")
 	for _, method := range service.Methods {
 		if method.Desc.Options() == nil {
 			continue
@@ -457,13 +531,18 @@ func generateServiceEndpoints(gfile *protogen.GeneratedFile, service *protogen.S
 		if proto.HasExtension(method.Desc.Options(), api_options.E_Http) {
 			endpoints, streaming := generateEndpoints(method)
 			for _, endpoint := range endpoints {
-				gfile.P("&", microApiPackage.Ident("Endpoint"), "{")
+				gfile.P("{")
 				generateEndpoint(gfile, serviceName, method.GoName, endpoint, streaming)
 				gfile.P("},")
 			}
 		}
 	}
 	gfile.P("}")
+	gfile.P(")")
+	gfile.P()
+
+	gfile.P("func New", serviceName, "Endpoints()", "[]", microApiPackage.Ident("Endpoint"), "{")
+	gfile.P("return ", serviceName, "Endpoints")
 	gfile.P("}")
 	gfile.P()
 }
@@ -572,6 +651,4 @@ func generateEndpoint(gfile *protogen.GeneratedFile, serviceName string, methodN
 		gfile.P("Stream: true,")
 	}
 	gfile.P(`Handler: "rpc",`)
-
-	return
 }

variables.go

@@ -11,10 +11,13 @@ var (
 	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")
-	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")
+	microApiPackage        = protogen.GoImportPath("go.unistack.org/micro/v3/api")
+	microClientPackage     = protogen.GoImportPath("go.unistack.org/micro/v3/client")
+	microServerPackage     = protogen.GoImportPath("go.unistack.org/micro/v3/server")
+	microClientHttpPackage = protogen.GoImportPath("go.unistack.org/micro-client-http/v3")
+	microServerHttpPackage = protogen.GoImportPath("go.unistack.org/micro-server-http/v3")
+	microCodecPackage      = protogen.GoImportPath("go.unistack.org/micro/v3/codec")
 	timePackage            = protogen.GoImportPath("time")
 	deprecationComment     = "// Deprecated: Do not use."
+	versionComment         = "v3.5.3"
 )