If / Else 逻辑和自定义变量

Question

我正在尝试使用 expressions 在我的管道中运行一些 if / else 逻辑。

trigger:
  - dev
  - qa
  - main
  - test/*

resources:
  - repo: self

variables:
  vmImageName: 'ubuntu-latest'
  # We get rid off the 'refs/heads/' to isolate the branch name and deduce the environment we're running on.
  # If running on 'main' branch, env value will be 'prod'.
  env: $[replace(replace(variables['Build.SourceBranchName'], 'main', 'prod'), 'refs/heads/', '')]

stages:
  - stage: Build
    displayName: Build stage
    jobs:
      - job: Build
        displayName: Build
        pool:
          vmImage: $(vmImageName)
        steps:
          - script: | # this below block works as expected            
              if [[ $(env) == "dev" ]] ; then
                echo "dev"
              elif [[ $(env) == "qa" ]] ; then
                echo "qa"
              elif [[ $(env) == "prod" ]] ; then
                echo "prod"
              else 
                echo "We are running on an unmanaged branch"
              fi
            displayName: Test 1        
          - script: echo "Deploying to $(env)"
            ${{ if in(variables['env'], 'prod', 'qa', 'dev') }}:
              displayName:  Deploy to a managed environment # we never get there
            ${{ else }}:
              displayName: Deploy to an unmanaged environment # always here

我已经尝试了 variables['env'] 和 variables.env 语法作为 stated here 但没有运气。

知道为什么我的实施不起作用吗？我想我可以在 if/else 语句中使用系统的 variables['Build.SourceBranchName']，但我想了解我的代码有什么问题。

Answer 1

因为 $[replace(replace(variables['Build.SourceBranchName'], 'main', 'prod'), 'refs/heads/', '')] 是一个 运行时 表达式，而 displayName 在之前运行时计算- 当 YAML 文件编译成计划时。

这就是 Build.SourceBranchName 对您有用的原因，因为此变量在运行时之前计算。

If / Else 逻辑和自定义变量

If / Else logic and custom variables

azure

azure-devops

azure-pipelines

azure-pipelines-yaml