Possible to use verify-files on individual files from a record ID?

[matthewfeickert]

There may be times where given the size of files associated with a record ID that a user might not want to download all of them simultaneously, but just one to test. Is it possible to provide an argument to cernopendata-client verify-files to indicate that a particular file is to be verified?

Example: After downloading the file mc-flavtag-ttbar-small.h5 from CERN Open Data Record ID https://opendata.cern.ch/record/93940 I'm not able to validate its digest my passing it to the CLI API

$ pixi global install cernopendata-client --with cernopendata-client-xrootd
$ cernopendata-client version
1.0.2
$ cernopendata-client download-files --recid 93940 --protocol xrootd --filter-name mc-flavtag-ttbar-small.h5 --download-engine xrootd
==> Downloading file 1 of 1
  -> File: ./93940/mc-flavtag-ttbar-small.h5
==> Success!
$ cernopendata-client verify-files --help
Usage: cernopendata-client verify-files [OPTIONS]

  Verify downloaded data file integrity.

  Select a CERN Open Data bibliographic record by a record ID, a DOI, or a
  title and verify integrity of downloaded data files belonging to this
  record.

  Examples:

       $ cernopendata-client verify-files --recid 5500

Options:
  --recid INTEGER  Record ID (exact match)
  --doi TEXT       Digital Object Identifier (exact match)
  --title TEXT     Record title (exact match, no wildcards)
  --server TEXT    Which CERN Open Data server to query?
                   [default=http://opendata.cern.ch]
  --help           Show this message and exit.
$ cernopendata-client verify-files --recid 93940
==> Verifying number of files for record 93940... 
  -> Expected 3, found 1
==> ERROR: File count does not match.
$ cernopendata-client verify-files --recid 93940 --title mc-flavtag-ttbar-small.h5 
==> Verifying number of files for record 93940... 
  -> Expected 3, found 1
==> ERROR: File count does not match.
$ cernopendata-client verify-files --recid 93940 ./93940/mc-flavtag-ttbar-small.h5 
Usage: cernopendata-client verify-files [OPTIONS]
Try 'cernopendata-client verify-files --help' for help.

Error: Got unexpected extra argument (./93940/mc-flavtag-ttbar-small.h5)

I assume(?) that verify-files is comparing the digest of the files to a published value on CERN Open Data. Is that correct? If so, is it possible to get a CLI API function to just get the digests of files associated with a record ID?

$ pixi global install openssl
$ openssl sha256 ./93940/mc-flavtag-ttbar-small.h5 
SHA2-256(./93940/mc-flavtag-ttbar-small.h5)= f7249d6b257b3ebba10acc003748db9ae26861acdf57eb92c912fd3870cb1e4a
$ openssl md5 ./93940/mc-flavtag-ttbar-small.h5 
MD5(./93940/mc-flavtag-ttbar-small.h5)= d72ab992af7ec5517297c05a7f51f7ad

[matthewfeickert]

I understand that PR #69 is doing verify-files per file, which is what the

==> Success!

is indicating. However, it would still be useful to be able to independently validate the digest at a per-file level.