Fail to active conda in Azure DevOps pipeline

CommandNotFoundError: Your shell has not been properly configured to use 'conda activate'.

Here the issue is your script is run in a sub-shell, but condahasn't been initialized in this sub-shell.

You need change your active script as：

steps:
  - task: Bash@3
    inputs:
      targetType: 'inline'
      script: |
        eval "$(conda shell.bash hook)"
        conda activate build_env
    displayName: Active

In addition, please do not split the Add PATH, create environment and active the environment into different jobs.

For Azure devops pipeline, agent job is the basic unit of the pipeline running process and each agent job has its own independent running environment and work logic.

For more detailed, you were using Hosted agent to apply your scripts in this issue scenario.

While there's one agent job starts to run, our pool system will assign an VM to this agent job. And, this VM will be recycled back once the agent job finished. When next agent job start to run , a completely new VM will be randomly reassign.

dependsOn can only share files and pass variables between jobs. It can not keep the VM continued in next job.

I believe you should be able to guess what problem you are going to encounter. Yes, even you can succeed to apply that activate script, you will continue face another error: Could not find conda environment: build_env. That's because the environment which is using by this activate script is a brand new vm, the VM that previous build_environment job used has been recycled by the system.

So, do not split the create environment and activate into 2 agent jobs:

  - job: build_environment
    displayName: Build Environment
    dependsOn: pre_build_setup
    steps:
      - script: conda env create --file environment.yml --name build_env
        displayName: Create Anaconda environment
      - script: conda env list
        displayName:  environment installation verification
      - task: Bash@3
        inputs:
          targetType: 'inline'
          script: |
            eval "$(conda shell.bash hook)"
            conda activate build_env
        displayName: Active