Update to use sip 6.6.x

1) Switch to running sip using its new sip-build command line interface,
   which requires writing out a pyproject.toml to configure it.
2) Generate the sip build file (sbf) ourselves since sip no longer writes
   them.
3) Remove the embedded sip module code and generate it on the fly during
   the build process.

Fixes #2169.

buildtools/wxpysip.py

@@ -1,110 +0,0 @@
-#----------------------------------------------------------------------
-# Name:        buildtools.wxpysip
-# Purpose:     Code to help migrate to SIP 5 with as little disruption
-#              as possible.
-#
-# Author:      Robin Dunn
-#
-# Created:     4-Jan-2021
-# Copyright:   (c) 2021 by Total Control Software
-# License:     wxWindows License
-#----------------------------------------------------------------------
-
-# NOTE: This code is mostly copied, adapted, and extended from the
-#       sipbuild.legacy.sip5 module. The main intent is to make it easy to run
-#       sip the same way as the legacy sip5 entry point, but without needing to
-#       run a subprocess, and to also add a little missing sip 4 functionality
-#       that we were depending on with the old SIP.
-import os
-
-from sipbuild.code_generator import (set_globals, parse, generateCode,
-        generateExtracts, generateAPI, generateXML, generateTypeHints)
-from sipbuild.exceptions import handle_exception, UserException
-from sipbuild.module import resolve_abi_version
-from sipbuild.version import SIP_VERSION, SIP_VERSION_STR
-
-
-def sip_runner(
-    specification,              # the name of the specification file [default stdin]
-    sources_dir=None,           # the name of the code output directory [default not generated]
-    include_dirs=[],            # add <DIR> to the list of directories to search when importing or including .sip files
-    warnings=False,             # enable warning messages [default disabled]
-    docstrings=False,           # enable the automatic generation of docstrings [default disabled]
-    release_gil=False,          # always release and reacquire the GIL [default only when specified]
-    sip_module=None,            # the fully qualified name of the sip module
-    api_extract=None,           # the name of the QScintilla API file [default not generated
-    exceptions=False,           # enable support for C++ exceptions [default disabled]
-    tracing=False,              # generate code with tracing enabled [default disabled]
-    extracts=[],                # add <ID:FILE> to the list of extracts to generate
-    pyi_extract=None,           # the name of the .pyi stub file [default not generated]
-    sbf_file=None,              # File to write the generated file lists to [default not generated]
-    abi_version=None,           # the sip ABI version
-    backstops=[],               # add <TAG> to the list of timeline backstops
-    py_debug=False,             # generate code for a debug build of Python
-    warnings_are_errors=False,  # warnings are handled as errors
-    parts=0,                    # split the generated code into <FILES> files [default 1 per class]
-    xml_extract=None,           # file to write sip xml to
-    protected_is_public=False,  # enable the protected/public hack [default disabled]
-    source_suffix=None,         # the suffix to use for C or C++ source files [default \".c\" or \".cpp\"]
-    tags=[],                    # add <TAG> to the list of versions/platforms to generate code for
-    disabled_features=[],       # add <FEATURE> to the list of disabled features
-    ):
-
-    print("Running SIP code generator on: {}".format(specification))
-
-    generated_files = []
-    try:
-        # The code generator requires the name of the sip module.
-        if sources_dir is not None and sip_module is None:
-            raise UserException("the name of the sip module must be given")
-
-        # Check the ABI version.
-        abi_major, abi_minor = resolve_abi_version(abi_version).split('.')
-
-        # Set the globals.
-        set_globals(SIP_VERSION, SIP_VERSION_STR, int(abi_major), int(abi_minor),
-                UserException, include_dirs)
-
-        # Parse the input file.
-        pt, _, _, _, tags, disabled_features = parse(specification,
-                (xml_extract is None), tags, backstops, disabled_features,
-                protected_is_public)
-
-        # Generate the bindings.
-        if sources_dir is not None:
-            generated_files = generateCode(pt, sources_dir, source_suffix,
-                    exceptions, tracing, release_gil, parts, tags,
-                    disabled_features, docstrings, py_debug, sip_module)
-
-        if sbf_file is not None:
-            generateBuildFile(sbf_file, generated_files)
-
-        # Generate any extracts.
-        generateExtracts(pt, extracts)
-
-        # Generate the API file.
-        if api_extract is not None:
-            generateAPI(pt, api_extract)
-
-        # Generate the type hints file.
-        if pyi_extract is not None:
-            generateTypeHints(pt, pyi_extract)
-
-        # Generate the XML file.
-        if xml_extract is not None:
-            generateXML(pt, xml_extract)
-
-    except Exception as e:
-        handle_exception(e)
-
-    return generated_files
-
-
-def generateBuildFile(sbf_file, generated_files):
-    header, sources = generated_files
-    header = os.path.basename(header)
-    sources = [os.path.basename(n) for n in sources]
-    with open(sbf_file, 'w') as f:
-        f.write("sources = {}\n".format(' '.join(sources)))
-        f.write("headers = {}\n".format(header))
-