nib-ls dicoms support

[yarikoptic]

We need it... And I wonder if by default it should do grouping among provided dicom files if necessary.

[massich]

can you elaborate?

[yarikoptic]

ATM nib-ls just ignores DICOM files or directories with dicoms, e.g.:

yoh@hopa:/tmp> datalad install -r -g ///dicoms/dartmouth-phantoms/bids_test3
[INFO   ] Installing dataset at /tmp/bids_test3 from http://datasets.datalad.org/dicoms/dartmouth-phantoms/bids_test3 
[INFO   ] Getting 1 items of dataset <Dataset path=/tmp/bids_test3> ... 
[INFO   ] Actually getting 398 files 
                                                                                                                                                                                                                                  
1 installed item is available at                                                                                                                                                                                                  
<Dataset path=/tmp/bids_test3>

yoh@hopa:/tmp> nib-ls  bids_test3/temp000001/AAHead_Scout_MPR_cor/
bids_test3/temp000001/AAHead_Scout_MPR_cor/ failed

*yoh@hopa:/tmp> nib-ls  bids_test3/temp000001/AAHead_Scout_MPR_cor/1.3.12.2.1107.5.2.43.66112.2016092713*
bids_test3/temp000001/AAHead_Scout_MPR_cor/1.3.12.2.1107.5.2.43.66112.2016092713464798772101835.dcm failed
bids_test3/temp000001/AAHead_Scout_MPR_cor/1.3.12.2.1107.5.2.43.66112.2016092713464798790801836.dcm failed
bids_test3/temp000001/AAHead_Scout_MPR_cor/1.3.12.2.1107.5.2.43.66112.2016092713464798809401837.dcm failed
bids_test3/temp000001/AAHead_Scout_MPR_cor/1.3.12.2.1107.5.2.43.66112.2016092713502231347001836.dcm failed
bids_test3/temp000001/AAHead_Scout_MPR_cor/1.3.12.2.1107.5.2.43.66112.2016092713502231366801837.dcm failed
bids_test3/temp000001/AAHead_Scout_MPR_cor/1.3.12.2.1107.5.2.43.66112.2016092713502231386101838.dcm failed

and it would be lovely if it output fields making it consistent with nib-ls output for .nii.gz files but also allowing to specify DICOM header fields via -H HEADER_FIELDS