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#!/usr/bin/python
#
# The azure lib checks the environment for two vars that can be sourced
# or defined before the command.
# export AZURE_STORAGE_ACCOUNT=tcontepub
# export AZURE_STORAGE_ACCESS_KEY='secret key'
from __future__ import print_function
from argparse import ArgumentParser
import base64
from collections import namedtuple
import hashlib
import mimetypes
from operator import attrgetter
import os
import socket
import sys
from azure.storage.blob import (
BlobBlock,
BlockBlobService,
ContentSettings,
Include,
)
mimetypes.init()
OK = 0
BAD_ARGS = 1
UNKNOWN_COMMAND = 2
NO_LOCAL_FILES = 4
UNKNOWN_PURPOSE = 5
LIST = 'list'
PUBLISH = 'publish'
DELETE = 'delete'
SYNC = 'sync'
RELEASED = 'released'
PROPOSED = 'proposed'
DEVEL = 'devel'
TESTING = 'testing'
WEEKLY = 'weekly'
PURPOSES = (RELEASED, PROPOSED, DEVEL, WEEKLY, TESTING)
JUJU_DIST = 'juju-tools'
CHUNK_SIZE = 4 * 1024 * 1024
SIGNED_EXTS = ('.sjson', '.gpg')
SyncFile = namedtuple(
'SyncFile', ['path', 'size', 'md5content', 'mimetype', 'local_path'])
def get_prefix(purpose):
"""Return the top-level dir name for the purpose."""
if purpose == RELEASED:
return 'tools'
else:
return purpose
def get_published_files(purpose, blob_service):
"""Return the SyncFile info about the published files."""
prefix = get_prefix(purpose)
return list_sync_files(prefix, blob_service)
def list_sync_files(prefix, blob_service):
"""Return the SyncFile info about files under the specified prefix."""
files = []
for blob in blob_service.list_blobs(
JUJU_DIST, prefix=prefix, include=Include.METADATA):
sync_file = SyncFile(
path=blob.name,
md5content=blob.properties.content_settings.content_md5,
size=blob.properties.content_length,
mimetype=blob.properties.content_settings.content_type,
local_path='')
files.append(sync_file)
return sorted(files, key=attrgetter('path'))
def get_local_files(purpose, local_dir):
"""Return SyncFile info about the files in the local tools tree."""
if not os.path.isdir(local_dir):
print('%s not found.' % local_dir)
return None
return [x for x in get_local_sync_files(get_prefix(purpose), local_dir) if
'mirror' not in os.path.basename(x.local_path)]
def get_local_sync_files(prefix, local_dir):
replacements = (local_dir, prefix)
found = []
for path, subdirs, files in os.walk(local_dir):
for name in files:
local_path = os.path.join(path, name)
publish_path = local_path.replace(*replacements)
if os.path.islink(local_path):
# The mirror files only belong on streams.canonical.com.
continue
size = os.path.getsize(local_path)
md5content = get_md5content(local_path)
mimetype, encoding = mimetypes.guess_type(name)
sync_file = SyncFile(
path=publish_path, size=size, md5content=md5content,
mimetype=mimetype, local_path=local_path)
found.append(sync_file)
return sorted(found, key=attrgetter('path'))
def get_md5content(local_path):
"""Return the base64 encoded md5 digest for the local file."""
md5 = hashlib.md5()
with open(local_path, mode='rb') as local_file:
md5.update(local_file.read())
base64_md5 = base64.encodestring(md5.digest()).strip()
return base64_md5
def publish_local_file(blob_service, sync_file):
"""Published the local file to the remote location.
The file is broken down into blocks that can be uploaded within
the azure restrictions. The blocks are then assembled into a blob
with the md5 content (base64 encoded digest).
"""
block_ids = []
index = 0
with open(sync_file.local_path, 'rb') as local_file:
while True:
data = local_file.read(CHUNK_SIZE)
if data:
block_id = base64.b64encode(str(index))
for i in range(0, 3):
try:
blob_service.put_block(
JUJU_DIST, sync_file.path, data, block_id)
block_ids.append(BlobBlock(id=block_id))
index += 1
break
except socket.error as e:
if e.errno not in (socket.errno.ECONNREFUSED,
socket.errno.ENETUNREACH,
socket.errno.ETIMEDOUT):
raise
else:
break
for i in range(0, 3):
try:
content_settings = ContentSettings(
content_type=sync_file.mimetype,
content_md5=sync_file.md5content)
blob_service.put_block_list(
JUJU_DIST, sync_file.path, block_ids,
content_settings=content_settings)
break
except socket.error as e:
if e.errno not in (socket.errno.ECONNREFUSED,
socket.errno.ENETUNREACH,
socket.errno.ETIMEDOUT):
raise
def list_published_files(blob_service, purpose):
"""List the files specified by the purpose."""
for sync_file in get_published_files(purpose, blob_service):
print(
'%s %s %s' % (
sync_file.path, sync_file.size, sync_file.md5content))
return OK
def normalized_dir(local_dir):
if local_dir.endswith('/'):
local_dir = local_dir[:-1]
return local_dir
def publish_files(blob_service, purpose, local_dir, args):
"""Publish the streams to the location for the intended purpose."""
local_dir = normalized_dir(local_dir)
print("Looking for published files in %s" % purpose)
published_files = get_published_files(purpose, blob_service)
print("Looking for local files in %s" % local_dir)
local_files = get_local_files(purpose, local_dir)
if local_files is None:
if args.verbose:
print("No files were found at {}".format(local_dir))
return NO_LOCAL_FILES
return publish_changed(blob_service, local_files, published_files, args)
def sync_files(blob_service, prefix, local_dir, args):
local_dir = normalized_dir(local_dir)
print("Looking for published files in %s" % prefix)
sync_files = list_sync_files(prefix, blob_service)
print("Looking for local files in %s" % local_dir)
local_files = get_local_sync_files(prefix, local_dir)
if local_files == []:
if args.verbose:
print("No files were found at {}".format(local_dir))
return NO_LOCAL_FILES
return publish_changed(blob_service, local_files, sync_files, args)
def publish_changed(blob_service, local_files, remote_files, args):
if args.verbose:
for lf in local_files:
print(lf.path)
published_dict = dict(
(sync_file.path, sync_file) for sync_file in remote_files)
for sync_file in local_files:
if sync_file.path not in published_dict:
print('%s is new.' % sync_file.path)
elif published_dict[sync_file.path].md5content != sync_file.md5content:
print('%s is different.' % sync_file.path)
if args.verbose:
print(
' published:%s != local:%s.' % (
published_dict[sync_file.path].md5content,
sync_file.md5content))
else:
if args.verbose:
print("Nothing to do: %s == %s" % (
sync_file.path, published_dict[sync_file.path].md5content))
continue
if not args.dry_run:
publish_local_file(blob_service, sync_file)
return OK
def delete_files(blob_service, purpose, files, args):
prefix = get_prefix(purpose)
for path in files:
if prefix is not None:
path = '%s/%s' % (prefix, path)
print("Deleting %s" % path)
if not args.dry_run:
blob_service.delete_blob(JUJU_DIST, path)
return OK
def main():
"""Execute the commands from the command line."""
parser = get_option_parser()
args = parser.parse_args()
blob_service = BlockBlobService(
account_name=args.account_name, account_key=args.account_key)
if args.command == SYNC:
return sync_files(blob_service, args.prefix, args.local_dir, args)
if args.purpose not in PURPOSES:
print('Unknown purpose: {}'.format(args.purpose))
return UNKNOWN_PURPOSE
if args.command == LIST:
return list_published_files(blob_service, args.purpose)
elif args.command == PUBLISH:
stream_path = os.path.join(args.path, get_prefix(args.purpose))
return publish_files(blob_service, args.purpose, stream_path, args)
elif args.command == DELETE:
if args.path is None:
parser.print_usage()
return BAD_ARGS
return delete_files(blob_service, args.purpose, args.path, args)
def add_mutation_args(parser, dr_help):
parser.add_argument("-d", "--dry-run", action="store_true",
default=False, help=dr_help)
parser.add_argument('-v', '--verbose', action="store_true",
default=False, help='Increase verbosity.')
def get_option_parser():
"""Return the option parser for this program."""
parser = ArgumentParser(description="Manage objects in Azure blob storage")
parser.add_argument(
'--account-name',
default=os.environ.get('AZURE_STORAGE_ACCOUNT', None),
help="The azure storage account, or env AZURE_STORAGE_ACCOUNT.")
parser.add_argument(
'--account-key',
default=os.environ.get('AZURE_STORAGE_ACCESS_KEY', None),
help="The azure storage account, or env AZURE_STORAGE_ACCESS_KEY.")
subparsers = parser.add_subparsers(help='sub-command help', dest='command')
for command in (LIST, PUBLISH, DELETE):
subparser = subparsers.add_parser(command, help='Command to run')
subparser.add_argument(
'purpose', help="<{}>".format(' | '.join(PURPOSES)))
if command == PUBLISH:
subparser.add_argument('path', help='The path to publish')
add_mutation_args(subparser, 'Do not publish')
elif command == DELETE:
subparser.add_argument('path', nargs="+",
help='The files to delete')
add_mutation_args(subparser, 'Do not delete')
sync_parser = subparsers.add_parser('sync',
help='Sync local files to remote.')
sync_parser.add_argument('local_dir', metavar='LOCAL-DIR',
help='The local directory to sync')
sync_parser.add_argument('prefix', metavar='PREFIX',
help='The remote prefix to sync to')
add_mutation_args(sync_parser, 'Do not sync')
return parser
if __name__ == '__main__':
sys.exit(main())
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