Try to replicate nipype bug

gistfile1.txt

orange:nipype_test filo$ ./test.py
orange:nipype_test filo$ ls -al /tmp/was_run
-rw-r--r--  1 filo  wheel  0 Nov 19 12:21 /tmp/was_run
orange:nipype_test filo$ rm -rf /tmp/was_run
orange:nipype_test filo$ python simple_interface.py
gzip test.txt
orange:nipype_test filo$ ls -al /tmp/was_run
ls: /tmp/was_run: No such file or directory

simple_interface.py

from nipype.interfaces.base import (
    TraitedSpec,
    CommandLineInputSpec,
    CommandLine,
    File
)

import os

class GZipInputSpec(CommandLineInputSpec):
    input_file = File(desc="File", exists=True, mandatory=True, argstr="%s")

class GZipOutputSpec(TraitedSpec):
    output_file = File(desc = "Zip file", exists = True)

class GZipTask(CommandLine):
    input_spec = GZipInputSpec
    output_spec = GZipOutputSpec
    cmd = 'gzip'

    def _list_outputs(self):
            outputs = self.output_spec().get()
            outputs['output_file'] = os.path.abspath(self.inputs.input_file + ".gz")
            return outputs

if __name__ == '__main__':

    zipper = GZipTask(input_file='test.txt')
    print zipper.cmdline
    zipper.run()

test.py

#!/usr/bin/env python

open("/tmp/was_run", "w").close()