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#!/usr/bin/env python3
"""Link your Launchpad user to github, proposing branches to LP and Github"""
from argparse import ArgumentParser
from subprocess import Popen, PIPE
import os
import sys
try:
from launchpadlib.launchpad import Launchpad
except ImportError:
print(
"Missing python launchpadlib dependency to create branches for you."
"Install with: sudo apt-get install python3-launchpadlib"
)
sys.exit(1)
if "avoid-pep8-E402-import-not-top-of-file":
_tdir = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
sys.path.insert(0, _tdir)
from cloudinit import util
DRYRUN = False
LP_TO_GIT_USER_FILE = ".lp-to-git-user"
MIGRATE_BRANCH_NAME = "migrate-lp-to-github"
GITHUB_PULL_URL = "https://github.com/canonical/cloud-init/compare/main...{github_user}:{branch}"
GH_UPSTREAM_URL = "https://github.com/canonical/cloud-init"
def error(message):
if isinstance(message, bytes):
message = message.decode("utf-8")
log("ERROR: {error}".format(error=message))
sys.exit(1)
def log(message):
print(message)
def subp(cmd, skip=False):
prefix = "SKIPPED: " if skip else "$ "
log("{prefix}{command}".format(prefix=prefix, command=" ".join(cmd)))
if skip:
return
proc = Popen(cmd, stdout=PIPE, stderr=PIPE)
out, err = proc.communicate()
if proc.returncode:
error(err if err else out)
return out.decode("utf-8")
LP_GIT_PATH_TMPL = "git+ssh://{launchpad_user}@git.launchpad.net/"
LP_UPSTREAM_PATH_TMPL = LP_GIT_PATH_TMPL + "cloud-init"
LP_REMOTE_PATH_TMPL = LP_GIT_PATH_TMPL + "~{launchpad_user}/cloud-init"
GITHUB_REMOTE_PATH_TMPL = "git@github.com:{github_user}/cloud-init.git"
# Comment templates
COMMIT_MSG_TMPL = """\
lp-to-git-users: adding {gh_username}
Mapped from {lp_username}
"""
PUBLISH_DIR = "/tmp/cloud-init-lp-to-github-migration"
def get_parser():
parser = ArgumentParser(description=__doc__)
parser.add_argument(
"--dryrun",
required=False,
default=False,
action="store_true",
help=(
"Run commands and review operation in dryrun mode, "
"making not changes."
),
)
parser.add_argument("launchpad_user", help="Your launchpad username.")
parser.add_argument("github_user", help="Your github username.")
parser.add_argument(
"--local-repo-dir",
required=False,
dest="repo_dir",
help=(
"The name of the local directory into which we clone."
" Default: {}".format(PUBLISH_DIR)
),
)
parser.add_argument(
"--upstream-branch",
required=False,
dest="upstream",
default="origin/main",
help=(
"The name of remote branch target into which we will merge."
" Default: origin/main"
),
)
parser.add_argument(
"-v",
"--verbose",
required=False,
default=False,
action="store_true",
help=("Print all actions."),
)
return parser
def create_publish_branch(upstream, publish_branch):
"""Create clean publish branch target in the current git repo."""
branches = subp(["git", "branch"])
upstream_remote, upstream_branch = upstream.split("/", 1)
subp(["git", "checkout", upstream_branch])
subp(["git", "pull"])
if publish_branch in branches:
subp(["git", "branch", "-D", publish_branch])
subp(["git", "checkout", upstream, "-b", publish_branch])
def add_lp_and_github_remotes(lp_user, gh_user):
"""Add lp and github remotes if not present.
@return Tuple with (lp_remote_name, gh_remote_name)
"""
lp_remote = LP_REMOTE_PATH_TMPL.format(launchpad_user=lp_user)
gh_remote = GITHUB_REMOTE_PATH_TMPL.format(github_user=gh_user)
remotes = subp(["git", "remote", "-v"])
lp_remote_name = gh_remote_name = None
for remote in remotes.splitlines():
if not remote:
continue
remote_name, remote_url, _operation = remote.split()
if lp_remote == remote_url:
lp_remote_name = remote_name
elif gh_remote == remote_url:
gh_remote_name = remote_name
if not lp_remote_name:
log(
"launchpad: Creating git remote launchpad-{} to point at your"
" LP repo".format(lp_user)
)
lp_remote_name = "launchpad-{}".format(lp_user)
subp(["git", "remote", "add", lp_remote_name, lp_remote])
try:
subp(["git", "fetch", lp_remote_name])
except:
log("launchpad: Pushing to ensure LP repo exists")
subp(["git", "push", lp_remote_name, "main:main"])
subp(["git", "fetch", lp_remote_name])
if not gh_remote_name:
log(
"github: Creating git remote github-{} to point at your"
" GH repo".format(gh_user)
)
gh_remote_name = "github-{}".format(gh_user)
subp(["git", "remote", "add", gh_remote_name, gh_remote])
try:
subp(["git", "fetch", gh_remote_name])
except:
log(
"ERROR: [github] Could not fetch remote '{remote}'."
"Please create a fork for your github user by clicking 'Fork'"
" from {gh_upstream}".format(
remote=gh_remote, gh_upstream=GH_UPSTREAM_URL
)
)
sys.exit(1)
return (lp_remote_name, gh_remote_name)
def create_migration_branch(
branch_name, upstream, lp_user, gh_user, commit_msg
):
"""Create an LP to Github migration branch and add lp_user->gh_user."""
log(
"Creating a migration branch: {} adding your users".format(
MIGRATE_BRANCH_NAME
)
)
create_publish_branch(upstream, MIGRATE_BRANCH_NAME)
lp_to_git_map = {}
lp_to_git_file = os.path.join(os.getcwd(), "tools", LP_TO_GIT_USER_FILE)
if os.path.exists(lp_to_git_file):
with open(lp_to_git_file) as stream:
lp_to_git_map = util.load_json(stream.read())
if gh_user in lp_to_git_map.values():
raise RuntimeError(
"github user '{}' already in {}".format(gh_user, lp_to_git_file)
)
if lp_user in lp_to_git_map:
raise RuntimeError(
"launchpad user '{}' already in {}".format(lp_user, lp_to_git_file)
)
lp_to_git_map[lp_user] = gh_user
with open(lp_to_git_file, "w") as stream:
stream.write(util.json_dumps(lp_to_git_map))
subp(["git", "add", lp_to_git_file])
commit_file = os.path.join(os.path.dirname(os.getcwd()), "commit.msg")
with open(commit_file, "wb") as stream:
stream.write(commit_msg.encode("utf-8"))
subp(["git", "commit", "--all", "-F", commit_file])
def main():
global DRYRUN
global VERBOSITY
parser = get_parser()
args = parser.parse_args()
DRYRUN = args.dryrun
VERBOSITY = 1 if args.verbose else 0
repo_dir = args.repo_dir or PUBLISH_DIR
if not os.path.exists(repo_dir):
cleanup_repo_dir = True
subp(
[
"git",
"clone",
LP_UPSTREAM_PATH_TMPL.format(
launchpad_user=args.launchpad_user
),
repo_dir,
]
)
else:
cleanup_repo_dir = False
cwd = os.getcwd()
os.chdir(repo_dir)
log("Syncing main branch with upstream")
subp(["git", "checkout", "main"])
subp(["git", "pull"])
try:
lp_remote_name, gh_remote_name = add_lp_and_github_remotes(
args.launchpad_user, args.github_user
)
commit_msg = COMMIT_MSG_TMPL.format(
gh_username=args.github_user, lp_username=args.launchpad_user
)
create_migration_branch(
MIGRATE_BRANCH_NAME,
args.upstream,
args.launchpad_user,
args.github_user,
commit_msg,
)
for push_remote in (lp_remote_name, gh_remote_name):
subp(["git", "push", push_remote, MIGRATE_BRANCH_NAME, "--force"])
except Exception as e:
error("Failed setting up migration branches: {0}".format(e))
finally:
os.chdir(cwd)
if cleanup_repo_dir and os.path.exists(repo_dir):
util.del_dir(repo_dir)
# Make merge request on LP
log("[launchpad] Automatically creating merge proposal using launchpadlib")
lp = Launchpad.login_with(
"server-team github-migration tool", "production", version="devel"
)
main = lp.git_repositories.getByPath(path="cloud-init").getRefByPath(
path="main"
)
LP_BRANCH_PATH = "~{launchpad_user}/cloud-init/+git/cloud-init"
lp_git_repo = lp.git_repositories.getByPath(
path=LP_BRANCH_PATH.format(launchpad_user=args.launchpad_user)
)
lp_user_migrate_branch = lp_git_repo.getRefByPath(
path="refs/heads/migrate-lp-to-github"
)
lp_merge_url = (
"https://code.launchpad.net/"
+ LP_BRANCH_PATH.format(launchpad_user=args.launchpad_user)
+ "/+ref/"
+ MIGRATE_BRANCH_NAME
)
try:
lp_user_migrate_branch.createMergeProposal(
commit_message=commit_msg, merge_target=main, needs_review=True
)
except Exception:
log(
"[launchpad] active merge proposal already exists at:\n"
"{url}\n".format(url=lp_merge_url)
)
else:
log(
"[launchpad] Merge proposal created at:\n{url}.\n".format(
url=lp_merge_url
)
)
log(
"To link your account to github open your browser and"
" click 'Create pull request' at the following URL:\n"
"{url}".format(
url=GITHUB_PULL_URL.format(
github_user=args.github_user, branch=MIGRATE_BRANCH_NAME
)
)
)
if os.path.exists(repo_dir):
util.del_dir(repo_dir)
return 0
if __name__ == "__main__":
sys.exit(main())