工具在受限制的环境中运行，并且不从父进程继承大多数环境变量。您可以使用EnvVarRequirement为工具设置环境变量。
    env.cwl

    1. #!/usr/bin/env cwl-runner
    3. cwlVersion: v1.0
    4. class: CommandLineTool
    5. baseCommand: env
    6. requirements:
    7.   EnvVarRequirement:
    8.     envDef:
    9.       HELLO: $(inputs.message)
    10. inputs:
    11.   message: string
    12. outputs:
    13.   example_out:
    14.     type: stdout
    15. stdout: output.txt

    echo-job.yml

    1. message: Hello world!

    运行cwl-runner

    1. $ cwl-runner env.cwl echo-job.yml
    2. [job env.cwl] /home/example$ env > /home/example/output.txt
    3. [job env.cwl] completed success
    4. {
    5.     "example_out": {
    6.         "location": "file:///home/example/output.txt",
    7.         "basename": "output.txt",
    8.         "class": "File",
    9.         "checksum": "sha1$1ca16a840b14807b2fd3323022c476b06a150e2f",
    10.         "size": 94,
    11.         "path": "/home/example/output.txt"
    12.     }
    13. }
    14. Final process status is success
    15. $ cat output.txt
    16. HELLO=Hello world!
    17. PATH=/bin:/usr/bin:/usr/local/bin
    18. HOME=/home/example
    19. TMPDIR=/tmp/tmp63Obpk