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#!/usr/bin/env python3
from pathlib import Path as P
from urllib.parse import urlparse
from contextlib import contextmanager
import os
import re
import sys
import argparse
import requests
import subprocess
import random
import string
URL = "https://gitlab.freedesktop.org/"
PARSER = argparse.ArgumentParser(
description="`Rebase` a branch from an old GStreamer module onto the monorepo"
)
PARSER.add_argument("repo", help="The repo with the old module to use. ie https://gitlab.freedesktop.org/user/gst-plugins-bad.git or /home/me/gst-build/subprojects/gst-plugins-bad")
PARSER.add_argument("branch", help="The branch to rebase.")
log_depth = [] # type: T.List[str]
@contextmanager
def nested(name=''):
global log_depth
log_depth.append(name)
try:
yield
finally:
log_depth.pop()
def bold(text: str):
return f"\033[1m{text}\033[0m"
def green(text: str):
return f"\033[1;32m{text}\033[0m"
def red(text: str):
return f"\033[1;31m{text}\033[0m"
def yellow(text: str):
return f"\033[1;33m{text}\033[0m"
def fprint(msg, nested=True):
if log_depth:
prepend = log_depth[-1] + ' | ' if nested else ''
else:
prepend = ''
print(prepend + msg, end="")
sys.stdout.flush()
class GstCherryPicker:
def __init__(self):
self.branch = None
self.repo = None
self.module = None
self.git_rename_limit = None
def check_clean(self):
try:
out = self.git("status", "--porcelain")
if out:
fprint("\n" + red('Git repository is not clean:') + "\n```\n" + out + "\n```\n")
sys.exit(1)
except Exception as e:
sys.exit(
f"Git repository is not clean. Clean it up before running ({e})")
def run(self):
assert self.branch
assert self.repo
self.check_clean()
try:
git_rename_limit = int(self.git("config", "merge.renameLimit"))
except subprocess.CalledProcessError:
git_rename_limit = 0
if int(git_rename_limit) < 999999:
self.git_rename_limit = git_rename_limit
fprint("-> Setting git rename limit to 999999 so we can properly cherry-pick between repos")
self.git("config", "merge.renameLimit", "999999")
fprint(f"{green(' OK')}\n", nested=False)
try:
self.rebase()
finally:
if self.git_rename_limit is not None:
self.git("config", "merge.renameLimit", str(self.git_rename_limit))
def rebase(self):
repo = urlparse(self.repo)
repo_path = P(repo.path)
self.module = module = repo_path.stem
remote_name = f"{module}-{repo_path.parent.name}"
fprint('Adding remotes...')
self.git("remote", "add", remote_name, self.repo, can_fail=True)
self.git("remote", "add", module, f"{URL}gstreamer/{module}.git",
can_fail=True)
fprint(f"{green(' OK')}\n", nested=False)
fprint(f'Fetching {remote_name}...')
self.git("fetch", remote_name,
interaction_message=f"fetching {remote_name} with:\n"
f" `$ git fetch {remote_name}`")
fprint(f"{green(' OK')}\n", nested=False)
fprint(f'Fetching {module}...')
self.git("fetch", module,
interaction_message=f"fetching {module} with:\n"
f" `$ git fetch {module}`")
fprint(f"{green(' OK')}\n", nested=False)
prevbranch = self.git("rev-parse", "--abbrev-ref", "HEAD").strip()
tmpbranchname = f"{remote_name}_{self.branch}"
fprint(f'Checking out branch {remote_name}/{self.branch} as {tmpbranchname}\n')
try:
self.git("checkout", f"{remote_name}/{self.branch}", "-b", tmpbranchname)
self.git("rebase", f"{module}/master",
interaction_message=f"Failed rebasing {remote_name}/{self.branch} on {module}/master with:\n"
f" `$ git rebase {module}/master`")
ret = self.cherry_pick(tmpbranchname)
except Exception as e:
self.git("rebase", "--abort", can_fail=True)
self.git("checkout", prevbranch)
self.git("branch", "-D", tmpbranchname)
raise
if ret:
fprint(f"{green(' OK')}\n", nested=False)
else:
self.git("checkout", prevbranch)
self.git("branch", "-D", tmpbranchname)
fprint(f"{red(' ERROR')}\n", nested=False)
def cherry_pick(self, branch):
shas = self.git('log', '--format=format:%H', f'{self.module}/master..').strip()
fprint(f'Resetting on origin/main')
self.git("reset", "--hard", "origin/main")
fprint(f"{green(' OK')}\n", nested=False)
for sha in reversed(shas.split()):
fprint(f' - Cherry picking: {bold(sha)}\n')
try:
self.git("cherry-pick", sha,
interaction_message=f"cherry-picking {sha} onto {branch} with:\n "
f" `$ git cherry-pick {sha}`",
revert_operation=["cherry-pick", "--abort"])
except Exception as e:
fprint(f' - Cherry picking failed: {bold(sha)}\n')
return False
return True
def git(self, *args, can_fail=False, interaction_message=None, call=False, revert_operation=None):
retry = True
while retry:
retry = False
try:
if not call:
try:
return subprocess.check_output(["git"] + list(args),
stdin=subprocess.DEVNULL,
stderr=subprocess.STDOUT).decode()
except Exception as e:
if not can_fail:
fprint(f"\n\n{bold(red('ERROR'))}: `git {' '.join(args)}` failed" + "\n", nested=False)
raise
else:
subprocess.call(["git"] + list(args))
return "All good"
except Exception as e:
if interaction_message:
output = getattr(e, "output", b"")
if output is not None:
out = output.decode()
else:
out = "????"
fprint(f"\n```"
f"\n{out}\n"
f"Entering a shell to fix:\n\n"
f" {bold(interaction_message)}\n\n"
f"You should then exit with the following codes:\n\n"
f" - {bold('`exit 0`')}: once you have fixed the problem and we can keep moving the \n"
f" - {bold('`exit 1`')}: {bold('retry')}: once you have let the repo in a state where cherry-picking the commit should be to retried\n"
f" - {bold('`exit 2`')}: stop the script and abandon rebasing your branch\n"
"\n```\n", nested=False)
try:
if os.name == 'nt':
shell = os.environ.get(
"COMSPEC", r"C:\WINDOWS\system32\cmd.exe")
else:
shell = os.environ.get(
"SHELL", os.path.realpath("/bin/sh"))
subprocess.check_call(shell)
except subprocess.CalledProcessError as e:
if e.returncode == 1:
retry = True
continue
elif e.returncode == 2:
if revert_operation:
self.git(*revert_operation, can_fail=True)
raise
except Exception as e:
# Result of subshell does not really matter
pass
return "User fixed it"
if can_fail:
return "Failed but we do not care"
raise e
def main():
picker = GstCherryPicker()
PARSER.parse_args(namespace=picker)
picker.run()
if __name__ == '__main__':
main()
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