blob: 4cdcf18b58af6902ba14479df7fc1fbb1ccbf2e8 [file] [log] [blame]
#!/usr/bin/env python2.7
# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import argparse
import itertools
import os
import subprocess
import sys
import xml.etree.ElementTree as ET
def main():
parser = argparse.ArgumentParser(
description="Find the first integration revision that integrated"
"a given petal revision.")
parser.add_argument("petal_path")
parser.add_argument("petal_revision")
args = parser.parse_args()
fuchsia_dir = os.environ["FUCHSIA_DIR"]
imports = ET.parse(os.path.join(
fuchsia_dir,
".jiri_manifest")).findall('./imports/import[@name=\'integration\']')
components = []
for n in imports:
if n.attrib["remote"].startswith("sso://"):
components.append("fuchsia")
break
components.extend([args.petal_path, "minimal"])
integration_dir = os.path.join(fuchsia_dir, "integration")
petal_dir = os.path.join(fuchsia_dir, args.petal_path)
manifest_path = os.path.join(*components)
project_xpath = './projects/project[@name=\'%s\']' % args.petal_path
# Used to avoid shelling out to git multiple times with same petal revision.
last_petal_revision_checked = None
descendant_found = False
for i in itertools.count(start=0, step=1):
manifest_string = subprocess.check_output([
"git",
"-C",
integration_dir,
"show",
"HEAD~%d:%s" % (i, manifest_path),
])
for project in ET.fromstring(manifest_string).findall(project_xpath):
petal_revision_at_integration_revision = project.attrib["revision"]
if petal_revision_at_integration_revision != last_petal_revision_checked:
last_petal_revision_checked = petal_revision_at_integration_revision
if not subprocess.call([
"git",
"-C",
petal_dir,
"merge-base",
"--is-ancestor",
args.petal_revision,
petal_revision_at_integration_revision,
]):
descendant_found = True
elif descendant_found:
subprocess.check_call(
[
"git",
"-C",
integration_dir,
"rev-parse",
"HEAD~%d" % (i - 1),
],
stdout=sys.stdout,
stderr=sys.stderr,
)
break
if __name__ == "__main__":
main()