higress-wasm-plugin-github action

feat:add build-and-push-wasm-plugin-image.yaml by Beatrueman · Pull Request #1069 · alibaba/higress

Ⅰ. Describe what this PR did

功能：添加了利用 GitHub Actions 来自动完成相应的镜像构建和发布工作的Workflow。支持通过push tag和手动触发两种方式。同时也遵循使用oras打包工具。
特点：完全按照Wasm 插件镜像规范进行镜像打包。

更新：

1. 添加了查找文件的逻辑，会在插件目录中查找spec.yaml、README.md和README-{lang}.md三个文件，有则在打包推送镜像时设置相应的media type。
2. 修改了review后存在的问题。
3. 修改了builder容器的启动命令为 docker run -itd --name builder xxx /bin/bash，之前使用sleep 99999是希望容器保持后台持续运行，这样只适合测试容器，不适合在生产环境中使用。
4. 重新提交PR是因为错误地提交了一些没用的commit，不太会删除，担心破坏仓库并且为了保持PR整洁所以重新提交。

Ⅱ. Does this pull request fix one issue?

fixes #1052

Ⅳ. Describe how to verify it

1.准备工作
添加Repository Secrets和 Repository variables。


2.通过push tag触发，先查找相关文件，然后将特定的插件打包成镜像并推送至指定仓库。

3.人工触发，指定插件名和版本号

Ⅴ. Special notes for reviews

这是我第一次参与开源贡献，希望能有所帮助！

name: Build and Push Wasm Plugin Image

on:
  push:
    tags:
    - "wasm-go-*-v*.*.*" # 匹配 wasm-go-{pluginName}-vX.Y.Z 格式的标签
  workflow_dispatch:
    inputs:
      plugin_name:
        description: 'Name of the plugin'
        required: true
        type: string
      version:
        description: 'Version of the plugin (optional, without leading v)'
        required: false
        type: string

jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    environment:
      name: image-registry-msg
    env:
      IMAGE_REGISTRY_SERVICE: ${{ vars.IMAGE_REGISTRY_SERVICE || 'higress-registry.cn-hangzhou.cr.aliyuncs.com' }}
      IMAGE_REPOSITORY: ${{ vars.IMAGE_REPOSITORY || 'plugins' }}
      GO_VERSION: 1.19
      TINYGO_VERSION: 0.25.0
      ORAS_VERSION: 1.0.0
    steps:
      - name: Set plugin_name and version from inputs or ref_name
        id: set_vars
        run: |
          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            plugin_name="${{ github.event.inputs.plugin_name }}"
            version="${{ github.event.inputs.version }}"
          else
            ref_name=${{ github.ref_name }}
            plugin_name=${ref_name#*-*-} # 删除插件名前面的字段(wasm-go-)
            plugin_name=${plugin_name%-*} # 删除插件名后面的字段(-vX.Y.Z)
            version=$(echo "$ref_name" | awk -F'v' '{print $2}')
          fi

          echo "PLUGIN_NAME=$plugin_name" >> $GITHUB_ENV
          echo "VERSION=$version" >> $GITHUB_ENV

      - name: Checkout code
        uses: actions/checkout@v3
      
      - name: File Check
        run: | 
          workspace=${{ github.workspace }}/plugins/wasm-go/extensions/${PLUGIN_NAME}
          push_command="./plugin.tar.gz:application/vnd.oci.image.layer.v1.tar+gzip"
          
          # 查找spec.yaml
          if [ -f "${workspace}/spec.yaml" ]; then
            echo "spec.yaml exists"
            push_command="$push_command ./spec.yaml:application/vnd.module.wasm.spec.v1+yaml"
          fi

          # 查找README.md
          case "$(ls ${workspace}/README*.md 2>/dev/null)" in
            *"README.md"*)
              echo "README.md exists"
              push_command="$push_command ./README.md:application/vnd.module.wasm.doc.v1+markdown"
              ;;
          esac
          
          # 查找README_{lang}.md
          for file in ${workspace}/README_*.md; do
            if [ -f "$file" ]; then
              file_name=$(basename $file)
              echo "$file_name exists"
              lang=$(basename $file | sed 's/README_//; s/.md//')
              push_command="$push_command ./$file_name:application/vnd.module.wasm.doc.v1.$lang+markdown"
            fi
          done

          echo "PUSH_COMMAND=\"$push_command\"" >> $GITHUB_ENV
        
      - name: Run a wasm-go-builder
        env: 
          PLUGIN_NAME: ${{ env.PLUGIN_NAME }}
          BUILDER_IMAGE: higress-registry.cn-hangzhou.cr.aliyuncs.com/plugins/wasm-go-builder:go${{ env.GO_VERSION }}-tinygo${{ env.TINYGO_VERSION }}-oras${{ env.ORAS_VERSION }}
        run: |
          docker run -itd --name builder -v ${{ github.workspace }}:/workspace -e PLUGIN_NAME=${{ env.PLUGIN_NAME }} --rm ${{ env.BUILDER_IMAGE }} /bin/bash

      - name: Build Image and Push
        run: |
          
          push_command=${{ env.PUSH_COMMAND }}
          push_command=${push_command#\"}
          push_command=${push_command%\"} # 删除PUSH_COMMAND中的双引号，确保oras push正常解析

          command="
          cd /workspace/plugins/wasm-go/extensions/${PLUGIN_NAME}
          go mod tidy
          tinygo build -o ./plugin.wasm -scheduler=none -target=wasi ./main.go
          tar czvf plugin.tar.gz /workspace/plugins/wasm-go/extensions/${PLUGIN_NAME}/plugin.wasm
          echo ${{ secrets.REGISTRY_PASSWORD }} | oras login -u ${{ secrets.REGISTRY_USERNAME }} --password-stdin ${{ env.IMAGE_REGISTRY_SERVICE }}
          oras push ${IMAGE_REGISTRY_SERVICE}/${IMAGE_REPOSITORY}:${VERSION} ${push_command}
          "
          docker exec builder bash -c "$command"