gemini refactored runtest.py

[bdbaddog]

Experimenting with Gemini refactoring runtest.py

I asked it to update the code to current best python practices.

Also added config file to get gemini to use the AGENTS.md (and not just gemini.md).
In theory most LLM's should read this now or at some point in the future.

Added an AGENTS.md file which tells LLMs info about our source tree and practices.

Contributor Checklist:

• I have created a new test or updated the unit tests to cover the new/changed functionality.
• I have updated CHANGES.txt and RELEASE.txt (and read the README.rst).
• I have updated the appropriate documentation

[mwichmann]

Nit:

warning: squelched 13 whitespace errors
warning: 18 lines add whitespace errors.

[mwichmann]

If the model is to improve the flow, it does that, but now we've got a main(), it's 240 lines long, which isn't really ideal. 65 lines are test discovery, I suggest we ask our chatty friend to factor that out into a function.

[mwichmann]

The CI error is that it oversimplified one case. Old code:

# did we end up with any tests?
if not tests:
    sys.stderr.write(parser.format_usage() + """
error: no tests matching the specification were found.
       See "Test selection options" in the help for details on
       how to specify and/or exclude tests.
""")
    sys.exit(1)

New code:

    if not tests:
        sys.stderr.write("error: no tests matching the specification were found.\n")
        sys.exit(1)

Not entirely sure why it would want to do that...

[mwichmann]

Not entirely sure why it would want to do that...

And the answer is, after the refactoring, the argparse parser object is not in scope when that error is generated. Those sorts of effects were why I never finished off this size of refactor...

[mwichmann]

From the plan it proposed:

3. Phase 3: Replace manual threading with concurrent.futures.

It didn't do this, and I'm fine with that. I did experiment once with using the ThreadPoolExecutor, but (to my eyes, anyway) it made the code more complicated rather than less. Our usage of threads is very basic here.

[bdbaddog]

From the plan it proposed:

3. Phase 3: Replace manual threading with `concurrent.futures`.

It didn't do this, and I'm fine with that. I did experiment once with using the ThreadPoolExecutor, but (to my eyes, anyway) it made the code more complicated rather than less. Our usage of threads is very basic here.

Yes. I only asked it do do phase 1 and 2.

        sys.stderr.write("error: no tests matching the specification were found.\n")

Asking gemini to refactor to allow that to stay the same.

[bdbaddog]

Nit:

warning: squelched 13 whitespace errors
warning: 18 lines add whitespace errors.

What's this from?

[bdbaddog]

After refactoring here's the size in LOC for each function in runtest.py

┌────────────────────┬────────────┬──────────┬───────────┐
│ Function           │ Start Line │ End Line │ Total LOC │
├────────────────────┼────────────┼──────────┼───────────┤
│ get_template_command │ 44         │ 78       │ 35        │
│ posint             │ 171        │ 176      │ 6         │
│ build_parser       │ 179        │ 285      │ 107       │
│ process_arguments  │ 287        │ 337      │ 51        │
│ parse_args         │ 339        │ 344      │ 6         │
│ scanlist           │ 347        │ 355      │ 9         │
│ find_unit_tests      │ 358        │ 369      │ 12        │
│ find_e2e_tests       │ 372        │ 391      │ 20        │
│ setup_logging      │ 393        │ 501      │ 109       │
│ log_result         │ 504        │ 519      │ 16        │
│ run_test           │ 522        │ 558      │ 37        │
│ setup_env          │ 573        │ 643      │ 71        │
│ discover_tests     │ 645        │ 701      │ 57        │
│ create_run_context   │ 703        │ 722      │ 20        │
│ execute_tests      │ 724        │ 744      │ 21        │
│ report_results     │ 746        │ 817      │ 72        │
│ main               │ 819        │ 838      │ 20        │
└────────────────────┴────────────┴──────────┴───────────┘

[mwichmann]

Nit:

warning: squelched 13 whitespace errors
warning: 18 lines add whitespace errors.

What's this from?

pulling down the patch and applying it (wget https://github.com/SCons/scons/pull/4821.patch) - the file is apparently full of trailing spaces, which in normal cases would be handled by .editorconfig

[mwichmann]

Although only minor changes, I'd call this round an improvement.