#前言
昨天我們看了一個 Bitbucket Pipeline 的範例

This is a sample build configuration for JavaScript.
# Check our guides at https://confluence.atlassian.com/x/14UWN for more examples.
# Only use spaces to indent your .yml configuration.
# -----
# You can specify a custom docker image from Docker Hub as your build environment.
image: node:lts

pipelines:
  default:
    - step:
        caches:
          - node
        script: # Modify the commands below to build your repository.
          - yarn install
          - yarn build
  branches:
    develop:
      - step:
          name: build and test
          caches:
          - node
          script: # Modify the commands below to build your repository.
          - yarn install
          - yarn build
          - yarn test:cov
      - step:
          name: deploy with tag
          script:
            # - apt-get update
            # - apt-get install -y unzip git
            - echo "Clone all the things!"
            - git tag -am "Tagging App for release ${BITBUCKET_BUILD_NUMBER}" v${BITBUCKET_BUILD_NUMBER}
            - git push origin v${BITBUCKET_BUILD_NUMBER}
    master:
      - step:
          name: build and test
          caches:
          - node
          script: # Modify the commands below to build your repository.
          - yarn install
          - yarn build
          - yarn test:cov
      - step:
          name: deploy with tag
          script:
            # - apt-get update
            # - apt-get install -y unzip git
            - echo "Clone all the things!"
            - git tag -am "Tagging App for release ${BITBUCKET_BUILD_NUMBER}" release${BITBUCKET_BUILD_NUMBER}
            - git push origin release${BITBUCKET_BUILD_NUMBER}

我們就開始來解析吧！

image: node:lts

代表的是要用什麼鏡像來執行，這邊用的是 node.js 的 LTS 版本

pipelines:
  default:
    - step:
        caches:
          - node
        script: # Modify the commands below to build your repository.
          - yarn install
          - yarn build

這邊描述所有預設的 branches 都要做的事情，caches 代表使用 npm 的快取。

script 表示的是要執行的指令，這邊執行了 yarn install 與 yarn build 只要這兩個指令通過，就代表 Pipeline 成功了！

    develop:
      - step:
          name: build and test
          caches:
          - node
          script: # Modify the commands below to build your repository.
          - yarn install
          - yarn build
          - yarn test:cov
      - step:
          name: deploy with tag
          script:
            # - apt-get update
            # - apt-get install -y unzip git
            - echo "Clone all the things!"
            - git tag -am "Tagging App for release ${BITBUCKET_BUILD_NUMBER}" v${BITBUCKET_BUILD_NUMBER}
            - git push origin v${BITBUCKET_BUILD_NUMBER}

這邊代表的是在 develop 分支下要執行的 Pipeline，除了有 default 的一些指令外，還另外加了 yarn test:cov，並且還會自行產生 Version Tag，這個 Version Tag 會觸發後面的部署流程，這個我們明天繼續！

最後是 master 分支的工作。其實跟 develop 大同小異，只是 Version Tag 的命名方式不一樣而已！

- git push origin release${BITBUCKET_BUILD_NUMBER}

OK！我們今天介紹了整個 Bitbucket Pipeline 最基礎的用法，明天就讓我們來介紹如何觸發 Google Cloud Build ！