2.12. 环境变量

CWL 工具运行于受限环境中，大多数环境变量都不会从父进程继承。 您可以使用 EnvVarRequirements 为该工具设置环境变量。

env.cwl

#!/usr/bin/env cwl-runner
cwlVersion: v1.2
class: CommandLineTool
baseCommand: env
requirements:
  EnvVarRequirement:
    envDef:
      HELLO: $(inputs.message)
inputs:
  message: string
outputs:
  example_out:
    type: stdout
stdout: output.txt

echo-job.yml

message: Hello world!

现在，在命令行上以工具描述和输入对象为参数调用 cwltool:

$ cwltool env.cwl echo-job.yml
INFO /home/docs/checkouts/readthedocs.org/user_builds/common-workflow-languageuser-guide-zh-hans/envs/latest/bin/cwltool 3.1.20240508115724
INFO Resolved 'env.cwl' to 'file:///home/docs/checkouts/readthedocs.org/user_builds/common-workflow-languageuser-guide-zh-hans/checkouts/latest/src/_includes/cwl/environment-variables/env.cwl'
INFO [job env.cwl] /tmp/93xwv4a7$ env > /tmp/93xwv4a7/output.txt
INFO [job env.cwl] completed success
{
    "example_out": {
        "location": "file:///home/docs/checkouts/readthedocs.org/user_builds/common-workflow-languageuser-guide-zh-hans/checkouts/latest/src/_includes/cwl/environment-variables/output.txt",
        "basename": "output.txt",
        "class": "File",
        "checksum": "sha1$6106dce0ff89de228514763f2a4a651d0f8bbe2a",
        "size": 277,
        "path": "/home/docs/checkouts/readthedocs.org/user_builds/common-workflow-languageuser-guide-zh-hans/checkouts/latest/src/_includes/cwl/environment-variables/output.txt"
    }
}INFO Final process status is success

$ cat output.txt
HOME=/tmp/93xwv4a7
TMPDIR=/tmp/cb0uat7h
PATH=/home/docs/checkouts/readthedocs.org/user_builds/common-workflow-languageuser-guide-zh-hans/envs/latest/bin:/home/docs/.asdf/shims:/home/docs/.asdf/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HELLO=Hello world!