add docker_image selection parameter

[MattShirley]

Adds docker_image to selection criteria. Front end work for ssl-hep/ServiceX#1162

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.27%. Comparing base (54819a3) to head (1fe7cae).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #680   +/-   ##
=======================================
  Coverage   98.27%   98.27%           
=======================================
  Files          29       29           
  Lines        2085     2089    +4     
=======================================
+ Hits         2049     2053    +4     
  Misses         36       36           

Flag	Coverage Δ
unittests	98.27% <100.00%> (+<0.01%)	⬆️

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[ponyisi]

Perhaps just "image"?

[ponyisi]

Is there actually a backwards compatibility problem on the server side?

Could the relevant tests get added?

[MattShirley]

@ponyisi I resolved the testing issues earlier this week.

What backward compatibility issues are you thinking of? Testing locally, when I send a request to the latest develop with docker_image set, my client completes with error:

                     Delivered Files
┏━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Sample         ┃ File Count ┃ Files                    ┃
┡━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ data18_periodD │      Error │ Failed to retrieve files │
└────────────────┴────────────┴──────────────────────────┘

Total files delivered: 0

My app pod has the following logged:

Traceback (most recent call last):
  File "/home/servicex/servicex_app/resources/transformation/submit.py", line 222, in post
    ) = self.code_gen_service.generate_code_for_selection(
  File "/home/servicex/servicex_app/code_gen_adapter.py", line 83, in generate_code_for_selection
    raise ValueError(f"Failed to generate translation code: {msg}")
ValueError: Failed to generate translation code: "docker_image is not implemented. Available keys: dict_keys(['reco', 'parton', 'particle', 'max_events', 'no_systematics', 'no_filter'])" extra: {'requestId': '3f1f2dae-61d2-4a5e-af40-d6ae034dc835', 'asctime': '2025-12-03 22:10:50'}

And the codegen:

10.244.27.213 - - [03/Dec/2025:22:07:20 +0000] "POST /servicex/generated-code HTTP/1.1" 200 2472 "-" "python-requests/2.32.4"
capable python /generated/transform_single_file.py
"docker_image is not implemented. Available keys: dict_keys(['reco', 'parton', 'particle', 'max_events', 'no_systematics', 'no_filter'])"
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/servicex_codegen/post_operation.py", line 94, in post
    generated_code_result = self.code_generator.generate_code(
  File "/home/servicex/servicex/TopCP_code_generator/request_translator.py", line 70, in generate_code
    query_translate.generate_files_from_query(query, query_file_path)
  File "/home/servicex/servicex/TopCP_code_generator/query_translate.py", line 66, in generate_files_from_query
    raise KeyError(
KeyError: "docker_image is not implemented. Available keys: dict_keys(['reco', 'parton', 'particle', 'max_events', 'no_systematics', 'no_filter'])"

[kyungeonchoi]

@MattShirley - would it be useful to check whether the user-defined image exists before send it to backend?