ad1218086e
Mypy cannot understand that this match can never be None, so help it along. Signed-off-by: John Snow <jsnow@redhat.com> Message-Id: <20210201193747.2169670-4-jsnow@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
98 lines
3.2 KiB
Python
98 lines
3.2 KiB
Python
# This work is licensed under the terms of the GNU GPL, version 2 or later.
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# See the COPYING file in the top-level directory.
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"""
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QAPI Generator
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This is the main entry point for generating C code from the QAPI schema.
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"""
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import argparse
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import re
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import sys
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from typing import Optional
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from .commands import gen_commands
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from .error import QAPIError
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from .events import gen_events
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from .introspect import gen_introspect
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from .schema import QAPISchema
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from .types import gen_types
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from .visit import gen_visit
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def invalid_prefix_char(prefix: str) -> Optional[str]:
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match = re.match(r'([A-Za-z_.-][A-Za-z0-9_.-]*)?', prefix)
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# match cannot be None, but mypy cannot infer that.
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assert match is not None
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if match.end() != len(prefix):
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return prefix[match.end()]
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return None
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def generate(schema_file: str,
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output_dir: str,
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prefix: str,
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unmask: bool = False,
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builtins: bool = False) -> None:
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"""
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Generate C code for the given schema into the target directory.
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:param schema_file: The primary QAPI schema file.
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:param output_dir: The output directory to store generated code.
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:param prefix: Optional C-code prefix for symbol names.
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:param unmask: Expose non-ABI names through introspection?
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:param builtins: Generate code for built-in types?
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:raise QAPIError: On failures.
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"""
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assert invalid_prefix_char(prefix) is None
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schema = QAPISchema(schema_file)
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gen_types(schema, output_dir, prefix, builtins)
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gen_visit(schema, output_dir, prefix, builtins)
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gen_commands(schema, output_dir, prefix)
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gen_events(schema, output_dir, prefix)
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gen_introspect(schema, output_dir, prefix, unmask)
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def main() -> int:
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"""
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gapi-gen executable entry point.
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Expects arguments via sys.argv, see --help for details.
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:return: int, 0 on success, 1 on failure.
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"""
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parser = argparse.ArgumentParser(
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description='Generate code from a QAPI schema')
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parser.add_argument('-b', '--builtins', action='store_true',
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help="generate code for built-in types")
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parser.add_argument('-o', '--output-dir', action='store',
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default='',
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help="write output to directory OUTPUT_DIR")
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parser.add_argument('-p', '--prefix', action='store',
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default='',
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help="prefix for symbols")
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parser.add_argument('-u', '--unmask-non-abi-names', action='store_true',
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dest='unmask',
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help="expose non-ABI names in introspection")
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parser.add_argument('schema', action='store')
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args = parser.parse_args()
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funny_char = invalid_prefix_char(args.prefix)
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if funny_char:
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msg = f"funny character '{funny_char}' in argument of --prefix"
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print(f"{sys.argv[0]}: {msg}", file=sys.stderr)
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return 1
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try:
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generate(args.schema,
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output_dir=args.output_dir,
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prefix=args.prefix,
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unmask=args.unmask,
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builtins=args.builtins)
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except QAPIError as err:
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print(f"{sys.argv[0]}: {str(err)}", file=sys.stderr)
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return 1
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return 0
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