unable to parse type: long as input through cli

[jeremiahsavage]

If I input type long through a json file, cwltool can parse the long, but if I use the cli to pass the parameter, I get an error.

emit_long.cwl

#!/usr/bin/env cwl-runner

cwlVersion: v1.0

class: CommandLineTool

inputs:
  - id: input
    type: long
    inputBinding:
      position: 0

outputs:
  - id: output
    type: string
    outputBinding:
      glob: output
      loadContents: true
      outputEval: $(self[0].contents)

stdout: output

baseCommand: [printf]

emit_long.json

{
    "input": 2147483648
}

cwltool emit_long.cwl emit_long.json 
/home/jeremiah/.virtualenvs/cwl/bin/cwltool 1.0.20170510165748
Resolved 'emit_long.cwl' to 'file:///home/jeremiah/emit_long.cwl'
[job emit_long.cwl] /tmp/tmpJNLfZB$ printf \
    2147483648 > /tmp/tmpJNLfZB/output
[job emit_long.cwl] completed success
{
    "output": "2147483648"
}
Final process status is success

cwltool emit_long.cwl --input 2147483648
/home/jeremiah/.virtualenvs/cwl/bin/cwltool 1.0.20170510165748
Resolved 'emit_long.cwl' to 'file:///home/jeremiah/emit_long.cwl'
usage: emit_long.cwl [-h] [job_order]
emit_long.cwl: error: unrecognized arguments: --input

cwltool --version
/home/jeremiah/.virtualenvs/cwl/bin/cwltool 1.0.20170510165748