如何将两个bash命令放入CWL文件？

cwlVersion: v1.0
class: CommandLineTool
baseCommand: [bash, -c]
inputs:
  - id: input1
    type: File
    inputBinding:
      position: 1
  - id: input2
    type: File
    inputBinding:
      position: 2
outputs:
  - id: output
    type: File
    outputBinding:
      glob: output.txt
stdout: output.txt
stderr: error.txt
requirements:
  ShellCommandRequirement: {}
steps:
  - id: bash_commands
    run:
      shellCommand: |
        echo "This is the first bash command"
        echo "This is the second bash command"
        echo "Input file 1: $input1"
        echo "Input file 2: $input2"
        echo "Output file: $output"