"make testios" fails with Xcode 16+ due to changes in xcresulttool

[ned-deily]

As of Xcode 16, Apple has changed the command interface to xcresultool such that the way it is invoked when running the testios recipe in Makefile.pre.in is no longer valid, causing the iOS test step to fail while attempting to extract the results of the test run.

[...]
# Regardless of success or failure, extract and print the test output
xcrun xcresulttool get --path iOSTestbed.arm64-iphonesimulator.1731824398/arm64-iphonesimulator.xcresult \
		--id $( xcrun xcresulttool get --path iOSTestbed.arm64-iphonesimulator.1731824398/arm64-iphonesimulator.xcresult --format json | _PYTHON_PROJECT_BASE=/Users/nad/Projects/PyDev/active/dev/3x/source/build-arm64-apple-ios-simulator _PYTHON_HOST_PLATFORM=ios-13.0-arm64-iphonesimulator PYTHONPATH=../Lib _PYTHON_SYSCONFIGDATA_NAME=_sysconfigdata__ios_arm64-iphonesimulator _PYTHON_SYSCONFIGDATA_PATH=/Users/nad/Projects/PyDev/active/dev/3x/source/build-arm64-apple-ios-simulator/build/lib.ios-13.0-arm64-iphonesimulator-3.14 /Users/nad/Projects/PyDev/active/dev/3x/source/build-arm64-apple-darwin/root-arm64-apple-darwin/bin/python3 -c "import sys, json; result = json.load(sys.stdin); print(result['actions']['_values'][0]['actionResult']['logRef']['id']['_value'])" ) \
		--format json | \
		_PYTHON_PROJECT_BASE=/Users/nad/Projects/PyDev/active/dev/3x/source/build-arm64-apple-ios-simulator _PYTHON_HOST_PLATFORM=ios-13.0-arm64-iphonesimulator PYTHONPATH=../Lib _PYTHON_SYSCONFIGDATA_NAME=_sysconfigdata__ios_arm64-iphonesimulator _PYTHON_SYSCONFIGDATA_PATH=/Users/nad/Projects/PyDev/active/dev/3x/source/build-arm64-apple-ios-simulator/build/lib.ios-13.0-arm64-iphonesimulator-3.14 /Users/nad/Projects/PyDev/active/dev/3x/source/build-arm64-apple-darwin/root-arm64-apple-darwin/bin/python3 -c "import sys, json; result = json.load(sys.stdin); print(result['subsections']['_values'][1]['subsections']['_values'][0]['emittedOutput']['_value'])"
Error: This command is deprecated and will be removed in a future release, --legacy flag is required to use it.
Usage: xcresulttool get object [--legacy] --path <path> [--id <id>] [--version <version>] [--format <format>]
  See 'xcresulttool get object --help' for more information.
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import sys, json; result = json.load(sys.stdin); print(result['actions']['_values'][0]['actionResult']['logRef']['id']['_value'])
                               ~~~~~~~~~^^^^^^^^^^^
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/__init__.py", line 293, in load
    return loads(fp.read(),
        cls=cls, object_hook=object_hook,
        parse_float=parse_float, parse_int=parse_int,
        parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ~~~~~~~~~~~~~~~~~~~~~~~^^^
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/decoder.py", line 345, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/decoder.py", line 363, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
Error: Missing value for '--id <id>'
Help:  --id <id>  The ID of the object [optional, assumes rootID if not specified].
Usage: xcresulttool get object [--legacy] --path <path> [--id <id>] [--version <version>] [--format <format>]
  See 'xcresulttool get object --help' for more information.
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import sys, json; result = json.load(sys.stdin); print(result['subsections']['_values'][1]['subsections']['_values'][0]['emittedOutput']['_value'])
                               ~~~~~~~~~^^^^^^^^^^^
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/__init__.py", line 293, in load
    return loads(fp.read(),
        cls=cls, object_hook=object_hook,
        parse_float=parse_float, parse_int=parse_int,
        parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
           ~~~~~~~~~~~~~~~~~~~~~~~^^^
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/decoder.py", line 345, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
               ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nad/Projects/PyDev/active/dev/3x/source/Lib/json/decoder.py", line 363, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
make: *** [testios] Error 1

Linked PRs

• gh-126925: Modify how iOS test results are gathered #127592
• [3.13] gh-126925: Modify how iOS test results are gathered (GH-127592) #127754
• gh-126925: Make PyConfig.use_system_logger read-only #129124

[freakboy3742]

See #126821 for related issue/feature. Adding stdout/stderr redirection will enable real-time log streaming, which means we don't need to extract stdout/err from the XCresult file, and will also allow progress tracking of a running test suite.