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Sat, 10 Oct 2020 11:55:04 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PULL 03/34] qapi-gen: Separate arg-parsing from generation Date: Sat, 10 Oct 2020 11:54:33 +0200 Message-Id: <20201010095504.796182-4-armbru@redhat.com> In-Reply-To: <20201010095504.796182-1-armbru@redhat.com> References: <20201010095504.796182-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=216.205.24.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/10 02:57:53 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, John Snow , Eduardo Habkost , Cleber Rosa Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: John Snow This is a minor re-work of the entrypoint script. It isolates a generate() method from the actual command-line mechanism. Signed-off-by: John Snow Reviewed-by: Eduardo Habkost Reviewed-by: Cleber Rosa Tested-by: Cleber Rosa Message-Id: <20201009161558.107041-4-jsnow@redhat.com> Reviewed-by: Markus Armbruster [invalid_char() renamed to invalid_prefix_char()] Signed-off-by: Markus Armbruster --- scripts/qapi-gen.py | 89 ++++++++++++++++++++++++++++++++++----------- 1 file changed, 67 insertions(+), 22 deletions(-) diff --git a/scripts/qapi-gen.py b/scripts/qapi-gen.py index 541e8c1f55..cf942d9ce3 100644 --- a/scripts/qapi-gen.py +++ b/scripts/qapi-gen.py @@ -1,30 +1,77 @@ #!/usr/bin/env python3 -# QAPI generator -# + # This work is licensed under the terms of the GNU GPL, version 2 or later. # See the COPYING file in the top-level directory. +""" +QAPI Generator + +This is the main entry point for generating C code from the QAPI schema. +""" import argparse import re import sys +from typing import Optional from qapi.commands import gen_commands +from qapi.error import QAPIError from qapi.events import gen_events from qapi.introspect import gen_introspect -from qapi.schema import QAPIError, QAPISchema +from qapi.schema import QAPISchema from qapi.types import gen_types from qapi.visit import gen_visit -def main(argv): +def invalid_prefix_char(prefix: str) -> Optional[str]: + match = re.match(r'([A-Za-z_.-][A-Za-z0-9_.-]*)?', prefix) + if match.end() != len(prefix): + return prefix[match.end()] + return None + + +def generate(schema_file: str, + output_dir: str, + prefix: str, + unmask: bool = False, + builtins: bool = False) -> None: + """ + Generate C code for the given schema into the target directory. + + :param schema_file: The primary QAPI schema file. + :param output_dir: The output directory to store generated code. + :param prefix: Optional C-code prefix for symbol names. + :param unmask: Expose non-ABI names through introspection? + :param builtins: Generate code for built-in types? + + :raise QAPIError: On failures. + """ + assert invalid_prefix_char(prefix) is None + + schema = QAPISchema(schema_file) + gen_types(schema, output_dir, prefix, builtins) + gen_visit(schema, output_dir, prefix, builtins) + gen_commands(schema, output_dir, prefix) + gen_events(schema, output_dir, prefix) + gen_introspect(schema, output_dir, prefix, unmask) + + +def main() -> int: + """ + gapi-gen executable entry point. + Expects arguments via sys.argv, see --help for details. + + :return: int, 0 on success, 1 on failure. + """ parser = argparse.ArgumentParser( description='Generate code from a QAPI schema') parser.add_argument('-b', '--builtins', action='store_true', help="generate code for built-in types") - parser.add_argument('-o', '--output-dir', action='store', default='', + parser.add_argument('-o', '--output-dir', action='store', + default='', help="write output to directory OUTPUT_DIR") - parser.add_argument('-p', '--prefix', action='store', default='', + parser.add_argument('-p', '--prefix', action='store', + default='', help="prefix for symbols") parser.add_argument('-u', '--unmask-non-abi-names', action='store_true', dest='unmask', @@ -32,25 +79,23 @@ def main(argv): parser.add_argument('schema', action='store') args = parser.parse_args() - match = re.match(r'([A-Za-z_.-][A-Za-z0-9_.-]*)?', args.prefix) - if match.end() != len(args.prefix): - print("%s: 'funny character '%s' in argument of --prefix" - % (sys.argv[0], args.prefix[match.end()]), - file=sys.stderr) - sys.exit(1) + funny_char = invalid_prefix_char(args.prefix) + if funny_char: + msg = f"funny character '{funny_char}' in argument of --prefix" + print(f"{sys.argv[0]}: {msg}", file=sys.stderr) + return 1 try: - schema = QAPISchema(args.schema) + generate(args.schema, + output_dir=args.output_dir, + prefix=args.prefix, + unmask=args.unmask, + builtins=args.builtins) except QAPIError as err: - print(err, file=sys.stderr) - exit(1) - - gen_types(schema, args.output_dir, args.prefix, args.builtins) - gen_visit(schema, args.output_dir, args.prefix, args.builtins) - gen_commands(schema, args.output_dir, args.prefix) - gen_events(schema, args.output_dir, args.prefix) - gen_introspect(schema, args.output_dir, args.prefix, args.unmask) + print(f"{sys.argv[0]}: {str(err)}", file=sys.stderr) + return 1 + return 0 if __name__ == '__main__': - main(sys.argv) + sys.exit(main()) -- 2.26.2