tools/gen_syntaqlite_parser

#!/usr/bin/env python3
# Copyright (C) 2026 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Regenerate the amalgamated PerfettoSQL parser using the syntaqlite CLI.

Reads the canonical grammar (`perfetto.y`) and AST node definitions
(`perfetto.synq`) from `src/trace_processor/perfetto_sql/syntaqlite/` and
writes the amalgamated `syntaqlite_perfetto.{c,h}` pair back into the same
directory.

The syntaqlite CLI is a prebuilt binary expected at
`buildtools/syntaqlite/syntaqlite[.exe]`. Run
`tools/install-build-deps --syntaqlite` to fetch it.
"""

import os
import platform
import subprocess
import sys

ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
SYNTAQLITE_DIR = os.path.join(ROOT_DIR, 'src', 'trace_processor',
                              'perfetto_sql', 'syntaqlite')
SYNTAQLITE_BIN_DIR = os.path.join(ROOT_DIR, 'buildtools', 'syntaqlite')


def syntaqlite_binary_path():
  suffix = '.exe' if platform.system() == 'Windows' else ''
  return os.path.join(SYNTAQLITE_BIN_DIR, f'syntaqlite{suffix}')


def main():
  binary = syntaqlite_binary_path()
  if not os.path.isfile(binary):
    sys.exit(f'syntaqlite binary not found at {binary}\n'
             f'Run `tools/install-build-deps --syntaqlite` to fetch it.')

  cmd = [
      binary,
      'dialect',
      'generate',
      '--name',
      'perfetto',
      '--actions-dir',
      SYNTAQLITE_DIR,
      '--nodes-dir',
      SYNTAQLITE_DIR,
      '--output-type',
      'full',
      '--output-dir',
      SYNTAQLITE_DIR,
      '--macro-style',
      'rust',
  ]
  print('Running:', ' '.join(cmd))
  subprocess.check_call(cmd)
  print(f'Wrote {SYNTAQLITE_DIR}/syntaqlite_perfetto.{{c,h}}')


if __name__ == '__main__':
  main()