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

Reviewed-on: #90

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: For reporting bugs in go-micro
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+1. What are you trying to do?
+2. What did you expect to happen?
+3. What happens instead?
+
+**How to reproduce the bug:**
+
+If possible, please include a minimal code snippet here.
+
+**Environment:**
+Go Version: please paste `go version` output here
+```
+please paste `go env` output here
+```

.github/ISSUE_TEMPLATE/feature-request---enhancement.md

@@ -0,0 +1,17 @@
+---
+name: Feature request / Enhancement
+about: If you have a need not served by go-micro
+title: "[FEATURE]"
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,14 @@
+---
+name: Question
+about: Ask a question about go-micro
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Before asking, please check if your question has already been answered: 
+
+1. Check the documentation - https://micro.mu/docs/
+2. Check the examples and plugins - https://github.com/micro/examples & https://github.com/micro/go-plugins
+3. Search existing issues

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+## Pull Request template
+Please, go through these steps before clicking submit on this PR.
+
+1. Give a descriptive title to your PR.
+2. Provide a description of your changes.
+3. Make sure you have some relevant tests.
+4. Put `closes #XXXX` in your comment to auto-close the issue that your PR fixes (if applicable).
+
+**PLEASE REMOVE THIS TEMPLATE BEFORE SUBMITTING**

.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/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

@@ -0,0 +1,47 @@
+name: build
+on:
+ push:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        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.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.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

@@ -0,0 +1,47 @@
+name: prbuild
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        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.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.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
+

LICENSE

@@ -1,22 +1,191 @@
-MIT License
 
-Copyright (c) 2021 Unistack LLC
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
 
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+   1. Definitions.
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2021 Unistack LLC.
+
+   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.

README.md

@@ -0,0 +1,26 @@
+# `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/).
+
+---
+
+This project is a generator plugin for the Google Protocol Buffers compiler (`protoc`).
+
+## Usage
+
+```console
+$> 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 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 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{})
@@ -23,53 +21,54 @@ func (g *Generator) chiGenerate(component string, plugin *protogen.Plugin) error
 
 		chiPackageFiles[file.GoPackageName] = struct{}{}
 		gname := "micro" + "_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, ".")
 
-		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()
 
-		gfile.P()
-		gfile.P("import (")
-		gfile.P(`"context"`)
-		gfile.P(`"fmt"`)
-		gfile.P(`"net/http"`)
-		gfile.P(`"reflect"`)
-		gfile.P(`"strings"`)
-		gfile.P(`chi "github.com/go-chi/chi/v4"`)
-		gfile.P(`middleware "github.com/go-chi/chi/v4/middleware"`)
-		gfile.P(`micro_api "github.com/unistack-org/micro/v3/api"`)
-		gfile.P(")")
-		gfile.P()
+		gfile.Import(contextPackage)
+		gfile.Import(fmtPackage)
+		gfile.Import(httpPackage)
+		gfile.Import(reflectPackage)
+		gfile.Import(stringsPackage)
+		gfile.Import(chiPackage)
+		gfile.Import(chiMiddlewarePackage)
 
 		gfile.P("type routeKey struct{}")
 
-		gfile.P("func RouteName(ctx context.Context) (string, bool) {")
+		gfile.P("func RouteName(ctx ", contextPackage.Ident("Context"), ") (string, bool) {")
 		gfile.P("value, ok := ctx.Value(routeKey{}).(string)")
 		gfile.P("return value, ok")
 		gfile.P("}")
 		gfile.P()
-		gfile.P("func RegisterHandlers(r *chi.Mux, h interface{}, eps []*micro_api.Endpoint) error {")
-		gfile.P("v := reflect.ValueOf(h)")
+		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 fmt.Errorf("handler has no methods: %T", h)`)
+		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("handler has no methods: %T", h)`)
 		gfile.P("}")
 		gfile.P("for _, ep := range eps {")
-		gfile.P(`idx := strings.Index(ep.Name, ".")`)
-		gfile.P("if idx < 1 || len(ep.Name) <= idx {")
-		gfile.P(`return fmt.Errorf("invalid api.Endpoint name: %s", ep.Name)`)
+		gfile.P(`idx := `, stringsPackage.Ident("Index"), `(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 fmt.Errorf("invalid handler, method %s not found", name)`)
+		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler, method %s not found", name)`)
 		gfile.P("}")
-		gfile.P("rh, ok := m.Interface().(func(http.ResponseWriter, *http.Request))")
+		gfile.P("rh, ok := m.Interface().(func(", httpPackage.Ident("ResponseWriter"), ", *", httpPackage.Ident("Request"), "))")
 		gfile.P("if !ok {")
-		gfile.P(`return fmt.Errorf("invalid handler: %#+v", m.Interface())`)
-		gfile.P("}")
-		gfile.P("for _, method := range ep.Method {")
-		gfile.P("r.With(middleware.WithValue(routeKey{}, ep.Name)).MethodFunc(method, ep.Path[0], rh)")
+		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler: %#+v", m.Interface())`)
 		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 v0.0.0-20210207032614-bba0dbe2a9ea
-	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=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
-cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
-cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
-cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
-cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
-cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
-cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
+github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
-github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
-github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
+github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
 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/flowstack/go-jsonschema v0.1.1/go.mod h1:yL7fNggx1o8rm9RlgXv7hTBWxdBM0rVwpMwimd3F3N0=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
-github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
-github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
-github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
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@@ -355,21 +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=
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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{})
@@ -23,43 +21,45 @@ func (g *Generator) gorillaGenerate(component string, plugin *protogen.Plugin) e
 
 		gorillaPackageFiles[file.GoPackageName] = struct{}{}
 		gname := "micro" + "_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, ".")
 
-		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()
 
-		gfile.P("import (")
-		gfile.P(`"fmt"`)
-		gfile.P(`"net/http"`)
-		gfile.P(`"reflect"`)
-		gfile.P(`"strings"`)
-		gfile.P()
-		gfile.P(`micro_api "github.com/unistack-org/micro/v3/api"`)
-		gfile.P(`mux "github.com/gorilla/mux"`)
-		gfile.P(")")
-		gfile.P()
+		gfile.Import(fmtPackage)
+		gfile.Import(httpPackage)
+		gfile.Import(reflectPackage)
+		gfile.Import(stringsPackage)
+		gfile.Import(gorillaMuxPackage)
 
-		gfile.P("func RegisterHandlers(r *mux.Router, h interface{}, eps []*micro_api.Endpoint) error {")
-		gfile.P("v := reflect.ValueOf(h)")
+		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 fmt.Errorf("handler has no methods: %T", h)`)
+		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("handler has no methods: %T", h)`)
 		gfile.P("}")
 		gfile.P("for _, ep := range eps {")
-		gfile.P(`idx := strings.Index(ep.Name, ".")`)
-		gfile.P("if idx < 1 || len(ep.Name) <= idx {")
-		gfile.P(`return fmt.Errorf("invalid api.Endpoint name: %s", ep.Name)`)
+		gfile.P(`idx := `, stringsPackage.Ident("Index"), `(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 fmt.Errorf("invalid handler, method %s not found", name)`)
+		gfile.P(`return `, fmtPackage.Ident("Errorf"), `("invalid handler, method %s not found", name)`)
 		gfile.P("}")
-		gfile.P("rh, ok := m.Interface().(func(http.ResponseWriter, *http.Request))")
+		gfile.P("rh, ok := m.Interface().(func(", httpPackage.Ident("ResponseWriter"), ", *", httpPackage.Ident("Request"), "))")
 		gfile.P("if !ok {")
-		gfile.P(`return fmt.Errorf("invalid handler: %#+v", m.Interface())`)
+		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
@@ -25,113 +14,42 @@ func (g *Generator) httpGenerate(component string, plugin *protogen.Plugin) erro
 		}
 
 		gname := file.GeneratedFilenamePrefix + "_micro_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, ".")
+		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.P("import (")
-		gfile.P(`"context"`)
-		gfile.P()
-		gfile.P(`micro_api "github.com/unistack-org/micro/v3/api"`)
-		gfile.P(`micro_client_http "github.com/unistack-org/micro-client-http/v3"`)
-		gfile.P(`micro_client "github.com/unistack-org/micro/v3/client"`)
-		gfile.P(`micro_server "github.com/unistack-org/micro/v3/server"`)
-		gfile.P(")")
 		gfile.P()
 
-		gfile.P("// Reference imports to suppress errors if they are not otherwise used.")
-		gfile.P("var (")
-		gfile.P("_ ", "micro_api.Endpoint")
-		gfile.P("_ ", "context.Context")
-		gfile.P(" _ ", "micro_client.Option")
-		gfile.P(" _ ", "micro_server.Option")
-		gfile.P(")")
-		gfile.P()
+		gfile.Import(contextPackage)
+
+		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, err := range files {
-		gfile := plugin.NewGeneratedFile(file+"_micro_errors.pb.go", ".")
-		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("package ", err.packageName)
-	gfile.P("import (")
-	gfile.P(`"fmt"`)
-	gfile.P(")")
-	for _, typ := range err.types {
-		gfile.P("func (err *", typ[strings.LastIndex(typ, ".")+1:], ") Error() string {")
-		gfile.P(`return fmt.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", "")
-	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
@@ -14,39 +16,53 @@ func (g *Generator) microGenerate(component string, plugin *protogen.Plugin) err
 		}
 
 		gname := file.GeneratedFilenamePrefix + "_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, ".")
 
-		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.P("import (")
-		gfile.P(`"context"`)
-		gfile.P()
-		gfile.P(`micro_api "github.com/unistack-org/micro/v3/api"`)
-		gfile.P(`micro_client "github.com/unistack-org/micro/v3/client"`)
-		gfile.P(")")
 		gfile.P()
 
-		gfile.P("// Reference imports to suppress errors if they are not otherwise used.")
-		gfile.P("var (")
-		gfile.P("_ ", "micro_api.Endpoint")
-		gfile.P("_ ", "context.Context")
-		gfile.P(" _ ", "micro_client.Option")
-		gfile.P(")")
-		gfile.P()
+		gfile.Import(contextPackage)
 
+		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
@@ -14,37 +14,40 @@ func (g *Generator) rpcGenerate(component string, plugin *protogen.Plugin) error
 		}
 
 		gname := file.GeneratedFilenamePrefix + "_micro_" + component + ".pb.go"
-		gfile := plugin.NewGeneratedFile(gname, ".")
+		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.P("import (")
-		gfile.P(`"context"`)
-		gfile.P()
-		gfile.P(`micro_api "github.com/unistack-org/micro/v3/api"`)
-		gfile.P(`micro_client "github.com/unistack-org/micro/v3/client"`)
-		gfile.P(`micro_server "github.com/unistack-org/micro/v3/server"`)
-		gfile.P(")")
 		gfile.P()
 
-		gfile.P("// Reference imports to suppress errors if they are not otherwise used.")
-		gfile.P("var (")
-		gfile.P("_ ", "micro_api.Endpoint")
-		gfile.P("_ ", "context.Context")
-		gfile.P(" _ ", "micro_client.Option")
-		gfile.P(" _ ", "micro_server.Option")
-		gfile.P(")")
-		gfile.P()
+		gfile.Import(contextPackage)
 
+		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)
+			}
 		}
 	}
 

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"
+)