Add a script to extract last commands executed by soong

This script will extract them into a shell script file under /tmp/,
which can be executed to reproduce the last execution.

Flag: EXEMPT host test change only
Bug: 292141694
Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/extract-last-soong-commands.py
    and check the content.
Change-Id: If29f62f14a1fd092263577a7a579a1b637982c99

1 files changed, 89 insertions, 0 deletions

diff --git a/ravenwood/scripts/extract-last-soong-commands.py b/ravenwood/scripts/extract-last-soong-commands.py
new file mode 100755
index 000000000000..bdc1de0c44f4
--- /dev/null
+++ b/ravenwood/scripts/extract-last-soong-commands.py
@@ -0,0 +1,89 @@
+#!/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:]))