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#!/usr/bin/env python3
# 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 QAPISchema
from qapi.types import gen_types
from qapi.visit import gen_visit
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='',
help="write output to directory OUTPUT_DIR")
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',
help="expose non-ABI names in introspection")
parser.add_argument('schema', action='store')
args = parser.parse_args()
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:
generate(args.schema,
output_dir=args.output_dir,
prefix=args.prefix,
unmask=args.unmask,
builtins=args.builtins)
except QAPIError as err:
print(f"{sys.argv[0]}: {str(err)}", file=sys.stderr)
return 1
return 0
if __name__ == '__main__':
sys.exit(main())
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