esptool fails to build with Python 3.14.0a2.

_________________ TestMultipleCommands.test_multiple_cmds_help _________________

self = <test_espefuse.TestMultipleCommands object at 0x7fc49cbcc410>

    def test_multiple_cmds_help(self):
        if arg_chip == "esp32c2":
            command1 = (
                f"burn_key_digest {S_IMAGES_DIR}"
                "/ecdsa256_secure_boot_signing_key_v2.pem"
            )
            command2 = (
                f"burn_key BLOCK_KEY0 {IMAGES_DIR}/128bit_key "
                "XTS_AES_128_KEY_DERIVED_FROM_128_EFUSE_BITS"
            )
        elif arg_chip == "esp32":
            command1 = f"burn_key_digest {S_IMAGES_DIR}/rsa_secure_boot_signing_key.pem"
            command2 = f"burn_key flash_encryption {IMAGES_DIR}/256bit"
        else:
            command1 = f"burn_key_digest BLOCK_KEY0 \
            {S_IMAGES_DIR}/rsa_secure_boot_signing_key.pem SECURE_BOOT_DIGEST0"
            command2 = f"burn_key BLOCK_KEY0 \
            {S_IMAGES_DIR}/rsa_public_key_digest.bin SECURE_BOOT_DIGEST0"
    
>       self.espefuse_py(
            f"-h {command1} {command2}",
            check_msg="usage: __main__.py [-h]",
        )

test/test_espefuse.py:1955: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
test/test_espefuse.py:144: in espefuse_py
    output = self._run_command(full_cmd, check_msg, ret_code)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <test_espefuse.TestMultipleCommands object at 0x7fc49cbcc410>
cmd = '/usr/bin/python3 -m espefuse --chip esp32 --virt --path-efuse-file /tmp/tmp5doua2or -d --do-not-confirm -h burn_key_d...ing_key.pem burn_key flash_encryption /builddir/build/BUILD/esptool-4.8.1-build/esptool-4.8.1/test/images/efuse/256bit'
check_msg = 'usage: __main__.py [-h]', ret_code = 0

    def _run_command(self, cmd, check_msg, ret_code):
        try:
            p = subprocess.Popen(
                cmd.split(),
                shell=False,
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
                universal_newlines=True,
            )
            output, _ = p.communicate()
            returncode = p.returncode
            if check_msg:
>               assert check_msg in output
E               AssertionError: assert 'usage: __main__.py [-h]' in 'espefuse.py v4.8.1\nusage: python3 -m espefuse [-h]\n                           [--chip {auto,esp32,esp32c2,esp32c3,e... --extend-efuse-table EXTEND_EFUSE_TABLE\n                        CSV file from ESP-IDF (esp_efuse_custom_table.csv)\n'

https://docs.python.org/3.14/whatsnew/3.14.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08351976-esptool/

For all our attempts to build esptool with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/esptool/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.