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#!/usr/bin/env python
# Copyright (C) 2013 Linaro Ltd.
import argparse
import os
import subprocess
import sys
import urlparse
import pwd
from tempfile import gettempdir
# Default read-only git URL.
BASE_PATH = "http://git.linaro.org/git-ro/"
# Path to local bin directory, %s is the user name.
LOCAL_BIN_DIR = "/home/%s/.local/bin"
# Default API host for RhodeCode.
DEFAULT_API_HOST = "http://0.0.0.0:5000"
# Name for a lock file.
LOCK_FILE_NAME = "mirror-repos.lock"
LOCK_FILE = os.path.join(gettempdir(), LOCK_FILE_NAME)
def args_parser():
"""Sets up the argument parser."""
parser = argparse.ArgumentParser()
parser.add_argument("--repos-list",
required=True,
help="File with the repository names to mirror.")
parser.add_argument("--checkout-dir",
required=True,
help="Where git repositories will be cloned.")
parser.add_argument("--user",
help="User to run the commands as.")
parser.add_argument("--rescan-repos",
action="store_true",
help="If the directory containing repositories "
"should be re-scanned when adding new ones.")
parser.add_argument("--api-key",
help="The RhodeCode API key to use for re-scanning "
"the repositories.")
parser.add_argument("--api-host",
default=DEFAULT_API_HOST,
help="The host URL where API interface is located. "
"Defaults to '%s'." % DEFAULT_API_HOST)
return parser
def check_args(args, parser):
"""Checks command line arguments passed.
:param args: All the command lines as returned by argparse.
:param parser: The argparse instance.
"""
if not os.path.exists(args.repos_list) or \
not os.path.isfile(args.repos_list):
print ("Error: file '%s' does not exists or is not a regular file." %
args.repos_list)
parser.print_usage()
sys.exit(1)
if not os.path.exists(args.checkout_dir) or \
not os.path.isdir(args.checkout_dir):
print ("Error: directory '%s' does not exists or cannot be "
"accessed." % args.checkout_dir)
parser.print_usage()
sys.exit(1)
if args.rescan_repos:
if not args.api_key:
print ("It is necessary to specify the API key of the admin user "
"to perform the rescan operation.")
parser.print_usage()
sys.exit(1)
# Just print a warning...
if args.api_host == DEFAULT_API_HOST:
print ("Warning: default API host will be used: "
"%s" % DEFAULT_API_HOST)
def mirror_repos(file, dest, user=None):
"""Clone a mirror copy of a remote repository from git.linaro.org.
:param file: The file where to read the repositories to mirror.
:param dest: The directory where to clone the repositories into.
"""
for line in open(file).readlines():
line = line.strip()
base_dir = os.path.basename(line)
# Git repos need to have a valid name.
if base_dir.split(".git")[0]:
# Maintain the same directory layout of original git.linaro.org.
full_path = os.path.join(dest, line.split(base_dir)[0])
# Skip if repository is already there.
if os.path.exists(os.path.join(full_path, base_dir)):
continue
# We need to do so, to create the directory as the RhodeCode user
# for our installation.
cmd_args = ["mkdir", "-p", full_path]
execute_command(cmd_args, user=user)
# We mirror the original repository, then through a cron job we can
# easily update it using the command 'git fetch -q'.
full_repo = urlparse.urljoin(BASE_PATH, line)
cmd_args = ["git", "clone", "--mirror", full_repo]
print "Cloning repository %s..." % full_repo
execute_command(cmd_args, work_dir=full_path, user=user)
def rescan_git_directory(api_key, api_host, user=None):
"""Rescans git directories for new repositories added.
:param api_key: The RhodeCode API key.
:type str
:param api_host: The RhodeCode host where to run the remote command.
:type str
:param user: The user to run the command as.
:type str
"""
if not user:
# Try to gess a user.
user = pwd.getpwuid(os.getuid())[0]
api_key_cmd = "--apikey=%s" % str(api_key)
api_host_cmd = "--apihost=%s" % api_host
api_cmd = os.path.join(LOCAL_BIN_DIR % user, "rhodecode-api")
cmd_args = [api_cmd, api_key_cmd, api_host_cmd, "rescan_repos"]
execute_command(cmd_args, user=user)
def execute_command(cmd_args, as_sudo=True, user=None, work_dir=os.getcwd()):
"""Executes the command using Popen.
:param cmd_args: The list of command and parameters to run.
:param as_sudo: If the command has to be run with 'sudo'.
:param user: Runs the comand as the specified user.
:param work_dir: Where the command should be run from.
"""
exec_args = []
if not isinstance(cmd_args, list):
cmd_args = [cmd_args]
if as_sudo:
exec_args = ["sudo"]
if user and as_sudo:
exec_args += ["-u", user, "-H"]
exec_args += cmd_args
process = subprocess.Popen(exec_args,
cwd=work_dir,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
p_out, p_err = process.communicate()
if process.returncode != 0:
print "Error executing the following command: %s" % " ".join(cmd_args)
if __name__ == '__main__':
parser = args_parser()
args = parser.parse_args()
check_args(args, parser)
if os.path.exists(LOCK_FILE):
print "Another process is still running: cannot acquire lock."
else:
try:
with open(LOCK_FILE, 'w'):
mirror_repos(args.repos_list,
args.checkout_dir,
user=args.user)
if args.rescan_repos:
print "Re-scanning git repositories directory..."
rescan_git_directory(args.api_key,
args.api_host,
user=args.user)
finally:
os.unlink(LOCK_FILE)
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