Amazon web services 如何在CodeDeploy buildspec文件上使用gulp？

以下是我的构建规范文件：

# 0.1 : shell for each command 
# 0.2 : shell keeps its settings
# https://stackoverflow.com/a/45115791/28004
version: 0.2 

phases:
  install:
    commands:
      - echo INSTALL started on `date`
      - cd wp-content/themes/sitecampaign-sage
      - echo `pwd`
      - npm install bower -g
      - npm install grunt -g
      - npm install gulp -g
      - echo INSTALL completed on `date`
  pre_build:
    commands:
      - echo PRE_BUILD started on `date`
      - echo `pwd`
      - bower -v
      - node -v
      - npm -v
      - gulp -v
      - gulp default
      - echo PRE_BUILD completed on `date`
  build:
    commands:
      - echo BUILD started on `date`
      - echo `pwd`
#      - gulp
      - echo BUILD completed on `date`
  post_build:
    commands:
      - echo POST_BUILD started on `date`
      - echo `pwd`
      - rm -rf node_modules
      - rm -rf bower_components
      - echo POST_BUILD completed on `date`
artifacts:
  files:
    - /**/*
  discard-paths: no

但是，即使gulp-v返回正确的gulp版本，运行gulp或gulp default gulp也会说gulp没有安装

我错过了什么？有人有相同的问题吗？

忘记了运行npm安装和bower安装。。。为了更多地关注工具本身，我忘记了简单地运行日常命令

最终文件规格：

# 0.1 : shell for each command 
# 0.2 : shell keeps its settings
# https://stackoverflow.com/a/45115791/28004
version: 0.2 

phases:
  install:
    commands:
      - echo INSTALL started on `date`
      - cd wp-content/themes/sitecampaign-sage
      - echo `pwd`
      - npm install bower -g
      - npm install grunt -g
      - npm install gulp -g
      - npm install
      - bower install --allow-root
      - echo INSTALL completed on `date`
  pre_build:
    commands:
      - echo PRE_BUILD started on `date`
      - echo `pwd`
      - bower -v
      - node -v
      - npm -v
      - gulp -v
      - which gulp
      - echo PRE_BUILD completed on `date`
  build:
    commands:
      - echo BUILD started on `date`
      - echo `pwd`
      - which gulp
      - gulp default
      - echo BUILD completed on `date`
  post_build:
    commands:
      - echo POST_BUILD started on `date`
      - echo `pwd`
      - rm -rf node_modules
      - rm -rf bower_components
      - echo POST_BUILD completed on `date`
artifacts:
  files:
    - /**/*

可能重复的