Add tool to help finalize extension SDK

Not intended to be a long-term solution, but allows us to get off
the ground and download/commit the artifacts in an efficient way.

Bug: 188787081
Test: run script on test topic
Change-Id: Ia01929cd3614f18cdad1e1b23594dd473a11051e
Merged-In: Ia01929cd3614f18cdad1e1b23594dd473a11051e
(cherry picked from commit a874e95adc)

tools/finalize_sdk.py

@@ -0,0 +1,114 @@
+#!/usr/bin/python3
+
+import argparse
+import os
+import re
+import subprocess
+import sys
+import tempfile
+import zipfile
+
+from collections import defaultdict
+
+# See go/fetch_artifact for details on this script.
+FETCH_ARTIFACT = '/google/data/ro/projects/android/fetch_artifact'
+BUILD_TARGET = 'mainline_modules-userdebug'
+ARTIFACT_PATTERN = 'mainline-sdks/*-%d.zip'
+COMMIT_TEMPLATE = """Finalize artifacts for extension SDK %d
+
+Import from build id %s.
+
+Generated with:
+$ %s
+
+Bug: %d
+Test: presubmit"""
+
+def fail(*args, **kwargs):
+    print(*args, file=sys.stderr, **kwargs)
+    sys.exit(1)
+
+def fetch_artifacts(target, build_id, artifact_path):
+    tmpdir = tempfile.TemporaryDirectory().name
+    os.mkdir(tmpdir)
+    print('Fetching %s from %s ...' % (artifact_path, target))
+    fetch_cmd = [FETCH_ARTIFACT]
+    fetch_cmd.extend(['--bid', str(build_id)])
+    fetch_cmd.extend(['--target', target])
+    fetch_cmd.append(artifact_path)
+    fetch_cmd.append(tmpdir)
+    print("Running: " + ' '.join(fetch_cmd))
+    try:
+        subprocess.check_output(fetch_cmd, stderr=subprocess.STDOUT)
+    except subprocess.CalledProcessError:
+        fail('FAIL: Unable to retrieve %s artifact for build ID %s' % (artifact_path, build_id))
+    return tmpdir
+
+def repo_for_sdk(filename):
+    module = filename.split('-')[0]
+    target_dir = ''
+    if module == 'media': return 'prebuilts/module_sdk/Media'
+    if module == 'tethering': return 'prebuilts/module_sdk/Connectivity'
+    for dir in os.listdir('prebuilts/module_sdk/'):
+        if module.lower() in dir.lower():
+            if target_dir:
+                fail('Multiple target dirs matched "%s": %s' % (module, (target_dir, dir)))
+            target_dir = dir
+    if not target_dir:
+        fail('Could not find a target dir for %s' % filename)
+
+    return 'prebuilts/module_sdk/%s' % target_dir
+
+def dir_for_sdk(filename, version):
+    base = str(version)
+    if 'test-exports' in filename:
+        return os.path.join(base, 'test-exports')
+    if 'host-exports' in filename:
+        return os.path.join(base, 'host-exports')
+    return base
+
+if not os.path.isdir('build/soong'):
+    fail("This script must be run from the top of an Android source tree.")
+
+parser = argparse.ArgumentParser(description=('Finalize an extension SDK with prebuilts'))
+parser.add_argument('-f', '--finalize_sdk', type=int, required=True, help='The numbered SDK to finalize.')
+parser.add_argument('-b', '--bug', type=int, required=True, help='The bug number to add to the commit message.')
+parser.add_argument('-a', '--amend_last_commit', action="store_true", help='Amend current HEAD commits instead of making new commits.')
+parser.add_argument('bid', help='Build server build ID')
+args = parser.parse_args()
+
+branch_name = 'finalize-%d' % args.finalize_sdk
+cmdline = " ".join(filter(lambda x: x not in ['-a', '--amend_last_commit'], sys.argv))
+commit_message = COMMIT_TEMPLATE % (args.finalize_sdk, args.bid, cmdline, args.bug)
+
+tmpdir = fetch_artifacts(BUILD_TARGET, args.bid, ARTIFACT_PATTERN % args.finalize_sdk)
+
+created_dirs = defaultdict(list)
+
+for f in os.listdir(tmpdir):
+    repo = repo_for_sdk(f)
+    dir = dir_for_sdk(f, args.finalize_sdk)
+    target_dir = os.path.join(repo, dir)
+    if os.path.isfile(target_dir):
+        print('Removing existing dir %s' % target_dir)
+        shutil.rmtree(target_dir)
+    with zipfile.ZipFile(os.path.join(tmpdir, f)) as zipFile:
+        zipFile.extractall(target_dir)
+
+    # Work around broken IPsec build rules (b/190499958)
+    if repo == 'prebuilts/module_sdk/IPsec':
+        os.rename(os.path.join(target_dir, 'Android.bp'), os.path.join(target_dir, 'Android.bp.disabled'))
+
+    print('Created %s' % target_dir)
+    created_dirs[repo].append(dir)
+
+subprocess.check_output(['repo', 'start', branch_name] + list(created_dirs.keys()))
+print('Running git commit')
+for repo in created_dirs:
+    git = ['git', '-C', repo]
+    subprocess.check_output(git + ['add'] + created_dirs[repo])
+    if args.amend_last_commit:
+        change_id = '\n' + re.search(r'Change-Id: [^\\n]+', str(subprocess.check_output(git + ['log', '-1']))).group(0)
+        subprocess.check_output(git + ['commit', '--amend', '-m', commit_message + change_id])
+    else:
+        subprocess.check_output(git + ['commit', '-m', commit_message])