Use node's working directory as output directory for BASIL

[tsalo]

Closes #549.

Changes proposed in this pull request

• Remove out_basename input from BASILCBF interface and just use the cwd as the output directory.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.90%. Comparing base (5bbe278) to head (cd8816a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #552      +/-   ##
==========================================
- Coverage   75.91%   75.90%   -0.02%     
==========================================
  Files          38       38              
  Lines        4082     4080       -2     
==========================================
- Hits         3099     3097       -2     
  Misses        983      983              

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[Copilot]

Pull Request Overview

This PR removes the out_basename input for the BASIL CBF interface and updates the code to use the Nipype node’s working directory for all outputs.

• Drop out_basename from the interface and workflow connections
• Switch all output paths in _list_outputs to os.path.abspath of relative subpaths

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
aslprep/workflows/asl/cbf.py	Remove the mapping of out_basename in the workflow
aslprep/interfaces/cbf.py	Delete the out_basename input and update output specs to use cwd

Comments suppressed due to low confidence (4)

aslprep/interfaces/cbf.py:886

• The helper _gen_outfilename still references out_file which is no longer defined after removing out_basename. Consider removing or updating this method to prevent a NameError when it's called.

return os.path.abspath(out_file)

aslprep/interfaces/cbf.py:891

• With output directories now implicitly using the node’s working directory, add or update tests to verify that these absolute paths resolve correctly and that outputs are written under the expected subfolders.

outputs['mean_cbf_basil'] = os.path.abspath('native_space/perfusion_calib.nii.gz')

aslprep/workflows/asl/cbf.py:557

• [nitpick] Since out_basename has been removed and the working directory is now used, consider adding a comment or updating the workflow docstring to clarify that all BASIL outputs will be written into the node’s working directory.

                (('m0_file', _getfiledir), 'out_basename'),

aslprep/interfaces/cbf.py:893

• [nitpick] The multi-line os.path.abspath calls have inconsistent indentation and a trailing comma on a single argument, which can be confusing. For readability, either inline the call or align the continued string literal under the opening parenthesis.

outputs['mean_cbf_gm_basil'] = os.path.abspath(