Add a script to extract last commands executed by soong

#!/usr/bin/env python3

# Copyright (C) 2024 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.

# This script extracts all the commands executed in the last soong run,

# and write them into a script file, and print the filename.

#

# All the commands are commented out. Uncomment what you want to execute as

# needed before running it.

import datetime

import gzip

import os

import re

import shlex

import sys

re_command = re.compile(r''' ^\[.*?\]  \s*  (.*) ''', re.X)

HEADER = r'''#!/bin/bash

set -e # Stop on a failed command

cd "${ANDROID_BUILD_TOP:?}"

'''

OUT_SCRIPT_DIR = "/tmp/"

OUT_SCRIPT_FORMAT = "soong-rerun-%Y-%m-%d_%H-%M-%S.sh"

def main(args):

    log = os.environ["ANDROID_BUILD_TOP"] + "/out/verbose.log.gz"

    outdir = "/tmp/"

    outfile = outdir + datetime.datetime.now().strftime(OUT_SCRIPT_FORMAT)

    with open(outfile, "w") as out:

        out.write(HEADER)

        with gzip.open(log) as f:

            for line in f:

                s = line.decode("utf-8")

                if s.startswith("verbose"):

                    continue

                if re.match('^\[.*bootstrap blueprint', s):

                    continue

                s = s.rstrip()

                m = re_command.search(s)

                if m:

                    command = m.groups()[0]

                    out.write('#========\n')

                    # Show the full command line before executing it.

                    out.write('#echo ' + shlex.quote(command) + '\n')

                    out.write('\n')

                    # Execute the command.

                    out.write('#' + command + '\n')

                    out.write('\n')

                    continue

                if s.startswith("FAILED:"):

                    break

    os.chmod(outfile, 0o755)

    print(outfile)

    return 0

if __name__ == '__main__':

    sys.exit(main(sys.argv[1:]))