#!/usr/bin/env python

## Amazon S3 manager
## Author: Michal Ludvig <michal@logix.cz>
##         http://www.logix.cz/michal
## License: GPL Version 2

import sys
import logging
import time
import os
import re
import errno
import glob
import traceback
import codecs
import locale

from copy import copy
from optparse import OptionParser, Option, OptionValueError, IndentedHelpFormatter
from logging import debug, info, warning, error
from distutils.spawn import find_executable

def output(message):
	sys.stdout.write(message + "\n")

def check_args_type(args, type, verbose_type):
	for arg in args:
		if S3Uri(arg).type != type:
			raise ParameterError("Expecting %s instead of '%s'" % (verbose_type, arg))

def cmd_du(args):
	s3 = S3(Config())
	if len(args) > 0:
		uri = S3Uri(args[0])
		if uri.type == "s3" and uri.has_bucket():
			subcmd_bucket_usage(s3, uri)
			return
	subcmd_bucket_usage_all(s3)

def subcmd_bucket_usage_all(s3):
	response = s3.list_all_buckets()

	buckets_size = 0
	for bucket in response["list"]:
		size = subcmd_bucket_usage(s3, S3Uri("s3://" + bucket["Name"]))
		if size != None:
			buckets_size += size
	total_size, size_coeff = formatSize(buckets_size, Config().human_readable_sizes)
	total_size_str = str(total_size) + size_coeff 
	output(u"".rjust(8, "-"))
	output(u"%s Total" % (total_size_str.ljust(8)))

def subcmd_bucket_usage(s3, uri):
	bucket = uri.bucket()
	object = uri.object()

	if object.endswith('*'):
		object = object[:-1]
	try:
		response = s3.bucket_list(bucket, prefix = object, recursive = True)
	except S3Error, e:
		if S3.codes.has_key(e.Code):
			error(S3.codes[e.Code] % bucket)
			return
		else:
			raise
	bucket_size = 0
	for object in response["list"]:
		size, size_coeff = formatSize(object["Size"], False)
		bucket_size += size
	total_size, size_coeff = formatSize(bucket_size, Config().human_readable_sizes)
	total_size_str = str(total_size) + size_coeff 
	output(u"%s %s" % (total_size_str.ljust(8), uri))
	return bucket_size

def cmd_ls(args):
	s3 = S3(Config())
	if len(args) > 0:
		uri = S3Uri(args[0])
		if uri.type == "s3" and uri.has_bucket():
			subcmd_bucket_list(s3, uri)
			return
	subcmd_buckets_list_all(s3)

def cmd_buckets_list_all_all(args):
	s3 = S3(Config())

	response = s3.list_all_buckets()

	for bucket in response["list"]:
		subcmd_bucket_list(s3, S3Uri("s3://" + bucket["Name"]))
		output(u"")


def subcmd_buckets_list_all(s3):
	response = s3.list_all_buckets()
	for bucket in response["list"]:
		output(u"%s  s3://%s" % (
			formatDateTime(bucket["CreationDate"]),
			bucket["Name"],
			))

def subcmd_bucket_list(s3, uri):
	bucket = uri.bucket()
	prefix = uri.object()

	debug(u"Bucket 's3://%s':" % bucket)
	if prefix.endswith('*'):
		prefix = prefix[:-1]
	try:
		response = s3.bucket_list(bucket, prefix = prefix)
	except S3Error, e:
		if S3.codes.has_key(e.info["Code"]):
			error(S3.codes[e.info["Code"]] % bucket)
			return
		else:
			raise

	for prefix in response['common_prefixes']:
		output(u"%s %s" % (
			"D".rjust(28),
			uri.compose_uri(bucket, prefix["Prefix"])))

	for object in response["list"]:
		size, size_coeff = formatSize(object["Size"], Config().human_readable_sizes)
		output(u"%s  %s%s  %s" % (
			formatDateTime(object["LastModified"]),
			str(size).rjust(8), size_coeff.ljust(1),
			uri.compose_uri(bucket, object["Key"]),
			))

def cmd_bucket_create(args):
	s3 = S3(Config())
	for arg in args:
		uri = S3Uri(arg)
		if not uri.type == "s3" or not uri.has_bucket() or uri.has_object():
			raise ParameterError("Expecting S3 URI with just the bucket name set instead of '%s'" % arg)
		try:
			response = s3.bucket_create(uri.bucket(), cfg.bucket_location)
			output(u"Bucket '%s' created" % uri.uri())
		except S3Error, e:
			if S3.codes.has_key(e.info["Code"]):
				error(S3.codes[e.info["Code"]] % uri.bucket())
				return
			else:
				raise

def cmd_bucket_delete(args):
	def _bucket_delete_one(uri):
		try:
			response = s3.bucket_delete(uri.bucket())
		except S3Error, e:
			if e.info['Code'] == 'BucketNotEmpty' and (cfg.force or cfg.recursive):
				warning(u"Bucket is not empty. Removing all the objects from it first. This may take some time...")
				subcmd_object_del_uri(uri, recursive = True)
				return _bucket_delete_one(uri)
			elif S3.codes.has_key(e.info["Code"]):
				error(S3.codes[e.info["Code"]] % uri.bucket())
				return
			else:
				raise
		
	s3 = S3(Config())
	for arg in args:
		uri = S3Uri(arg)
		if not uri.type == "s3" or not uri.has_bucket() or uri.has_object():
			raise ParameterError("Expecting S3 URI with just the bucket name set instead of '%s'" % arg)
		_bucket_delete_one(uri)
		output(u"Bucket '%s' removed" % uri.uri())

def fetch_remote_keys(args):
	remote_uris = []
	remote_keys = []

	for arg in args:
		uri = S3Uri(arg)
		if not uri.type == 's3':
			raise ParameterError("Expecting S3 URI instead of '%s'" % arg)
		remote_uris.append(uri)

	if cfg.recursive:
		for uri in remote_uris:
			objectlist = _get_filelist_remote(uri)
			for key in objectlist.iterkeys():
				object = S3Uri(objectlist[key]['object_uri_str'])
				## Remove leading '/' from remote filenames
				if key.find("/") == 0:
					key = key[1:]
				download_item = {
					'remote_uri' : object,
					'key' : key
				}
				remote_keys.append(download_item)
	else:
		for uri in remote_uris:
			uri_str = str(uri)
			## Wildcards used in remote URI?
			## If yes we'll need a bucket listing...
			if uri_str.find('*') > -1 or uri_str.find('?') > -1:
				first_wildcard = uri_str.find('*')
				first_questionmark = uri_str.find('?')
				if first_questionmark > -1 and first_questionmark < first_wildcard:
					first_wildcard = first_questionmark
				prefix = uri_str[:first_wildcard]
				rest = uri_str[first_wildcard+1:]
				## Only request recursive listing if the 'rest' of the URI,
				## i.e. the part after first wildcard, contains '/'
				need_recursion = rest.find('/') > -1
				objectlist = _get_filelist_remote(S3Uri(prefix), recursive = need_recursion)
				for key in objectlist:
					## Check whether the 'key' matches the requested wildcards
					if glob.fnmatch.fnmatch(objectlist[key]['object_uri_str'], uri_str):
						download_item = {
							'remote_uri' : S3Uri(objectlist[key]['object_uri_str']),
							'key' : key,
						}
						remote_keys.append(download_item)
			else:
				## No wildcards - simply append the given URI to the list
				key = os.path.basename(uri.object())
				if not key:
					raise ParameterError(u"Expecting S3 URI with a filename or --recursive: %s" % uri.uri())
				download_item = {
					'remote_uri' : uri,
					'key' : key
				}
				remote_keys.append(download_item)
	return remote_keys

def cmd_object_put(args):
	s3 = S3(Config())

	uri_arg = args.pop()
	check_args_type(args, 'file', 'filename')

	uri = S3Uri(uri_arg)
	if uri.type != "s3":
		raise ParameterError("Expecting S3 URI instead of '%s'" % uri_arg)

	if len(args) > 1 and uri.object() != "" and not Config().force:
		error(u"When uploading multiple files the last argument must")
		error(u"be a S3 URI specifying just the bucket name")
		error(u"WITHOUT object name!")
		error(u"Alternatively use --force argument and the specified")
		error(u"object name will be prefixed to all stored filenames.")
		sys.exit(1)
	
	seq = 0
	total = len(args)
	for file in args:
		seq += 1
		uri_arg_final = str(uri)
		if len(args) > 1 or uri.object() == "":
			uri_arg_final += os.path.basename(file)
		
		uri_final = S3Uri(uri_arg_final)
		extra_headers = {}
		real_filename = file
		seq_label = "[%d of %d]" % (seq, total)
		if Config().encrypt:
			exitcode, real_filename, extra_headers["x-amz-meta-s3tools-gpgenc"] = gpg_encrypt(file)
		try:
			response = s3.object_put(real_filename, uri_final, extra_headers, extra_label = seq_label)
		except S3UploadError, e:
			error(u"Upload of '%s' failed too many times. Skipping that file." % real_filename)
			continue
		except InvalidFileError, e:
			warning(u"File can not be uploaded: %s" % e)
			continue
		speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
		if not Config().progress_meter:
			output(u"File '%s' stored as %s (%d bytes in %0.1f seconds, %0.2f %sB/s) %s" %
				(file, uri_final, response["size"], response["elapsed"], speed_fmt[0], speed_fmt[1],
				seq_label))
		if Config().acl_public:
			output(u"Public URL of the object is: %s" %
				(uri_final.public_url()))
		if Config().encrypt and real_filename != file:
			debug(u"Removing temporary encrypted file: %s" % real_filename)
			os.remove(real_filename)

def cmd_object_get(args):
	cfg = Config()
	s3 = S3(cfg)

	## Check arguments:
	## if not --recursive:
	##   - first N arguments must be S3Uri
	##   - if the last one is S3 make current dir the destination_base
	##   - if the last one is a directory:
	##       - take all 'basenames' of the remote objects and
	##         make the destination name be 'destination_base'+'basename'
	##   - if the last one is a file or not existing:
	##       - if the number of sources (N, above) == 1 treat it
	##         as a filename and save the object there.
	##       - if there's more sources -> Error
	## if --recursive:
	##   - first N arguments must be S3Uri
	##       - for each Uri get a list of remote objects with that Uri as a prefix
	##       - apply exclude/include rules
	##       - each list item will have MD5sum, Timestamp and pointer to S3Uri
	##         used as a prefix.
	##   - the last arg may be a local directory - destination_base
	##   - if the last one is S3 make current dir the destination_base
	##   - if the last one doesn't exist check remote list:
	##       - if there is only one item and its_prefix==its_name 
	##         download that item to the name given in last arg.
	##       - if there are more remote items use the last arg as a destination_base
	##         and try to create the directory (incl. all parents).
	##
	## In both cases we end up with a list mapping remote object names (keys) to local file names.

	## Each item will be a dict with the following attributes
	# {'remote_uri', 'local_filename'}
	download_list = []

	if len(args) == 0:
		raise ParameterError("Nothing to download. Expecting S3 URI.")

	if S3Uri(args[-1]).type == 'file':
		destination_base = args.pop()
	else:
		destination_base = "."

	if len(args) == 0:
		raise ParameterError("Nothing to download. Expecting S3 URI.")

	remote_keys = fetch_remote_keys(args)
	total_count = len(remote_keys)

	if not os.path.isdir(destination_base) or destination_base == '-':
		## We were either given a file name (existing or not) or want STDOUT
		if total_count > 1:
			raise ParameterError("Destination must be a directory when downloading multiple sources.")
		remote_keys[0]['local_filename'] = destination_base
	elif os.path.isdir(destination_base):
		if destination_base[-1] != os.path.sep:
			destination_base += os.path.sep
		for key in remote_keys:
			key['local_filename'] = destination_base + key['key']
	else:
		raise InternalError("WTF? Is it a dir or not? -- %s" % destination_base)

	seq = 0
	for item in remote_keys:
		seq += 1
		uri = item['remote_uri']
		## Encode / Decode destination with "replace" to make sure it's compatible with current encoding
		destination = unicodise_safe(item['local_filename'])
		seq_label = "[%d of %d]" % (seq, total_count)

		start_position = 0

		if destination == "-":
			## stdout
			dst_stream = sys.__stdout__
		else:
			## File
			try:
				file_exists = os.path.exists(destination)
				try:
					dst_stream = open(destination, "ab")
				except IOError, e:
					if e.errno == errno.ENOENT:
						basename = destination[:destination.rindex(os.path.sep)]
						info(u"Creating directory: %s" % basename)
						os.makedirs(basename)
						dst_stream = open(destination, "ab")
					else:
						raise
				if file_exists:
					if Config().get_continue:
						start_position = dst_stream.tell()
					elif Config().force:
						start_position = 0L
						dst_stream.seek(0L)
						dst_stream.truncate()
					elif Config().skip_existing:
						info(u"Skipping over existing file: %s" % (destination))
						continue
					else:
						dst_stream.close()
						raise ParameterError(u"File %s already exists. Use either of --force / --continue / --skip-existing or give it a new name." % destination)
			except IOError, e:
				error(u"Skipping %s: %s" % (destination, e.strerror))
				continue
		response = s3.object_get(uri, dst_stream, start_position = start_position, extra_label = seq_label)
		if response["headers"].has_key("x-amz-meta-s3tools-gpgenc"):
			gpg_decrypt(destination, response["headers"]["x-amz-meta-s3tools-gpgenc"])
			response["size"] = os.stat(destination)[6]
		if not Config().progress_meter and destination != "-":
			speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
			output(u"File %s saved as '%s' (%d bytes in %0.1f seconds, %0.2f %sB/s)" %
				(uri, destination, response["size"], response["elapsed"], speed_fmt[0], speed_fmt[1]))

def cmd_object_del(args):
	while (len(args)):
		uri_arg = args.pop(0)
		uri = S3Uri(uri_arg)
		if uri.type != "s3":
			raise ParameterError("Expecting S3 URI instead of '%s'" % uri_arg)
		if not uri.has_object():
			if Config().recursive and not Config().force:
				raise ParameterError("Please use --force to delete ALL contents of %s" % uri)
			elif not Config().recursive:
				raise ParameterError("Object name required, not only the bucket name")
		subcmd_object_del_uri(uri)

def subcmd_object_del_uri(uri, recursive = None):
	s3 = S3(Config())
	if recursive is None:
		recursive = cfg.recursive
	uri_list = []
	if recursive:
		filelist = _get_filelist_remote(uri)
		uri_base = 's3://' + uri.bucket() + "/"
		for idx in filelist:
			object = filelist[idx]
			debug(u"Adding URI " + uri_base + object['object_key'])
			uri_list.append(S3Uri(uri_base + object['object_key']))
	else:
		uri_list.append(uri)
	for _uri in uri_list:
		response = s3.object_delete(_uri)
		output(u"Object %s deleted" % _uri)

def subcmd_cp_mv(args, process_fce, message):
	src_uri = S3Uri(args.pop(0))
	dst_uri = S3Uri(args.pop(0))

	if len(args): 
		raise ParameterError("Too many parameters! Expected: %s" % commands['cp']['param']) 

	if src_uri.type != "s3" or dst_uri.type != "s3": 
		raise ParameterError("Parameters are not URIs! Expected: %s" % commands['cp']['param']) 

	if dst_uri.object() == "":
		dst_uri = S3Uri(dst_uri.uri() + src_uri.object())
 
	response = process_fce(src_uri, dst_uri) 
	output(message % { "src" : src_uri, "dst" : dst_uri})
	if Config().acl_public:
		output(u"Public URL is: %s" % dst_uri.public_url())

def cmd_cp(args):
	s3 = S3(Config())
	subcmd_cp_mv(args, s3.object_copy, "Object %(src)s copied to %(dst)s")

def cmd_mv(args):
	s3 = S3(Config())
	subcmd_cp_mv(args, s3.object_move, "Object %(src)s moved to %(dst)s")

def cmd_info(args):
	s3 = S3(Config())

	while (len(args)):
		uri_arg = args.pop(0)
		uri = S3Uri(uri_arg)
		if uri.type != "s3" or not uri.has_bucket():
			raise ParameterError("Expecting S3 URI instead of '%s'" % uri_arg)

		try:
			if uri.has_object():
				info = s3.object_info(uri)
				output(u"%s (object):" % uri.uri())
				output(u"   File size: %s" % info['headers']['content-length'])
				output(u"   Last mod:  %s" % info['headers']['last-modified'])
				output(u"   MIME type: %s" % info['headers']['content-type'])
				output(u"   MD5 sum:   %s" % info['headers']['etag'].strip('"'))
			else:
				info = s3.bucket_info(uri)
				output(u"%s (bucket):" % uri.uri())
				output(u"   Location:  %s" % info['bucket-location'])
			acl = s3.get_acl(uri)
			acl_list = acl.getGrantList()
			for user in acl_list:
				output(u"   ACL:       %s: %s" % (user, acl_list[user]))
			if acl.isAnonRead():
				output(u"   URL:       %s" % uri.public_url())
		except S3Error, e:
			if S3.codes.has_key(e.info["Code"]):
				error(S3.codes[e.info["Code"]] % uri.bucket())
				return
			else:
				raise

def _get_filelist_local(local_uri):
	info(u"Compiling list of local files...")
	local_path = deunicodise(local_uri.path())
	if os.path.isdir(local_path):
		loc_base = os.path.join(local_path, "")
		filelist = os.walk(local_path)
	else:
		loc_base = "." + os.path.sep
		filelist = [( '.', [], [local_path] )]
	loc_base_len = len(loc_base)
	loc_list = {}
	for root, dirs, files in filelist:
		## TODO: implement explicit exclude
		for f in files:
			full_name = os.path.join(root, f)
			if not os.path.isfile(full_name):
				continue
			if os.path.islink(full_name):
				## Synchronize symlinks... one day
				## for now skip over
				continue
			file = unicodise(full_name[loc_base_len:])
			sr = os.stat_result(os.lstat(full_name))
			loc_list[file] = {
				'full_name_unicoded' : unicodise(full_name),
				'full_name' : full_name,
				'size' : sr.st_size, 
				'mtime' : sr.st_mtime,
				## TODO: Possibly more to save here...
			}
	return loc_list

def _get_filelist_remote(remote_uri, recursive = True):
	## If remote_uri ends with '/' then all remote files will have 
	## the remote_uri prefix removed in the relative path.
	## If, on the other hand, the remote_uri ends with something else
	## (probably alphanumeric symbol) we'll use the last path part 
	## in the relative path.
	##
	## Complicated, eh? See an example:
	## _get_filelist_remote("s3://bckt/abc/def") may yield:
	## { 'def/file1.jpg' : {}, 'def/xyz/blah.txt' : {} }
	## _get_filelist_remote("s3://bckt/abc/def/") will yield:
	## { 'file1.jpg' : {}, 'xyz/blah.txt' : {} }
	## Furthermore a prefix-magic can restrict the return list:
	## _get_filelist_remote("s3://bckt/abc/def/x") yields:
	## { 'xyz/blah.txt' : {} }

	info(u"Retrieving list of remote files for %s ..." % remote_uri)

	s3 = S3(Config())
	response = s3.bucket_list(remote_uri.bucket(), prefix = remote_uri.object(), recursive = recursive)

	rem_base_original = rem_base = remote_uri.object()
	remote_uri_original = remote_uri
	if rem_base != '' and rem_base[-1] != '/':
		rem_base = rem_base[:rem_base.rfind('/')+1]
		remote_uri = S3Uri("s3://%s/%s" % (remote_uri.bucket(), rem_base))
	rem_base_len = len(rem_base)
	rem_list = {}
	break_now = False
	for object in response['list']:
		if object['Key'] == rem_base_original and object['Key'][-1] != os.path.sep:
			## We asked for one file and we got that file :-)
			key = os.path.basename(object['Key'])
			object_uri_str = remote_uri_original.uri()
			break_now = True
			rem_list = {}	## Remove whatever has already been put to rem_list
		else:
			key = object['Key'][rem_base_len:]		## Beware - this may be '' if object['Key']==rem_base !!
			object_uri_str = remote_uri.uri() + key
		rem_list[key] = { 
			'size' : int(object['Size']),
			'timestamp' : dateS3toUnix(object['LastModified']), ## Sadly it's upload time, not our lastmod time :-(
			'md5' : object['ETag'][1:-1],
			'object_key' : object['Key'],
			'object_uri_str' : object_uri_str,
			'base_uri' : remote_uri,
		}
		if break_now:
			break
	return rem_list

def _compare_filelists(src_list, dst_list, src_is_local_and_dst_is_remote):
	info(u"Verifying checksums...")
	cfg = Config()
	exists_list = {}
	exclude_list = {}
	if cfg.debug_syncmatch:
		logging.root.setLevel(logging.DEBUG)
	for file in src_list.keys():
		if not cfg.debug_syncmatch:
			debug(u"CHECK: %s" % (os.sep + file))
		excluded = False
		for r in cfg.exclude:
			## all paths start with '/' from the base dir
			if r.search(os.sep + file):
				## Can't directly 'continue' to the outer loop
				## therefore this awkward excluded switch :-(
				excluded = True
				if cfg.debug_syncmatch:
					debug(u"EXCL: %s" % (os.sep + file))
					debug(u"RULE: '%s'" % (cfg.debug_exclude[r]))
				else:
					info(u"%s: excluded" % file)
				break
		if excluded:
			exclude_list = src_list[file]
			del(src_list[file])
			continue
		else:
			debug(u"PASS: %s" % (os.sep + file))
		if dst_list.has_key(file):
			## Was --skip-existing requested?
			if cfg.skip_existing:
				debug(u"IGNR: %s (used --skip-existing)" % (file))
				exists_list[file] = src_list[file]
				del(src_list[file])
				## Remove from destination-list, all that is left there will be deleted
				del(dst_list[file])
				continue

			## Check size first
			if dst_list[file]['size'] == src_list[file]['size']:
				#debug(u"%s same size: %s" % (file, dst_list[file]['size']))
				## ... same size, check MD5
				if src_is_local_and_dst_is_remote:
					src_md5 = Utils.hash_file_md5(src_list[file]['full_name'])
					dst_md5 = dst_list[file]['md5']
				else:
					src_md5 = src_list[file]['md5']
					dst_md5 = Utils.hash_file_md5(dst_list[file]['full_name'])
				if src_md5 == dst_md5:
					#debug(u"%s md5 matches: %s" % (file, dst_md5))
					## Checksums are the same.
					## Remove from source-list, all that is left there will be transferred
					debug(u"IGNR: %s (transfer not needed: MD5 OK, Size OK)" % file)
					exists_list[file] = src_list[file]
					del(src_list[file])
				else:
					debug(u"XFER: %s (md5 mismatch: src=%s dst=%s)" % (file, src_md5, dst_md5))
			else:
				debug(u"XFER: %s (size mismatch: src=%s dst=%s)" % (file, src_list[file]['size'], dst_list[file]['size']))
                        
			## Remove from destination-list, all that is left there will be deleted
			#debug(u"%s removed from destination list" % file)
			del(dst_list[file])
	if cfg.debug_syncmatch:
		warning(u"Exiting because of --debug-syncmatch")
		sys.exit(0)

	return src_list, dst_list, exists_list, exclude_list

def cmd_sync_remote2local(src, dst):
	def _parse_attrs_header(attrs_header):
		attrs = {}
		for attr in attrs_header.split("/"):
			key, val = attr.split(":")
			attrs[key] = val
		return attrs
		
	s3 = S3(Config())

	src_uri = S3Uri(src)
	dst_uri = S3Uri(dst)

	src_base = src_uri.uri()
	dst_base = dst_uri.path()
	if not src_base[-1] == "/": src_base += "/"

	rem_list = _get_filelist_remote(src_uri)
	rem_count = len(rem_list)

	loc_list = _get_filelist_local(dst_uri)
	loc_count = len(loc_list)
	
	info(u"Found %d remote files, %d local files" % (rem_count, loc_count))

	_compare_filelists(rem_list, loc_list, False)

	info(u"Summary: %d remote files to download, %d local files to delete" % (len(rem_list), len(loc_list)))

	for file in loc_list:
		if cfg.delete_removed:
			os.unlink(dst_base + file)
			output(u"deleted '%s'" % (dst_base + file))
		else:
			output(u"not-deleted '%s'" % file)

	total_size = 0
	total_count = len(rem_list)
	total_elapsed = 0.0
	timestamp_start = time.time()
	seq = 0
	dir_cache = {}
	file_list = rem_list.keys()
	file_list.sort()
	for file in file_list:
		seq += 1
		uri = S3Uri(src_base + file)
		dst_file = dst_base + file
		seq_label = "[%d of %d]" % (seq, total_count)
		try:
			dst_dir = os.path.dirname(dst_file)
			if not dir_cache.has_key(dst_dir):
				dir_cache[dst_dir] = Utils.mkdir_with_parents(dst_dir)
			if dir_cache[dst_dir] == False:
				warning(u"%s: destination directory not writable: %s" % (file, dst_dir))
				continue
			try:
				open_flags = os.O_CREAT
				if cfg.force:
					open_flags |= os.O_TRUNC
				else:
					open_flags |= os.O_EXCL

				debug(u"dst_file=%s" % dst_file)
				# This will have failed should the file exist
				os.close(os.open(dst_file, open_flags))
				# Yeah I know there is a race condition here. Sadly I don't know how to open() in exclusive mode.
				dst_stream = open(dst_file, "wb")
				response = s3.object_get(uri, dst_stream, extra_label = seq_label)
				dst_stream.close()
				if response['headers'].has_key('x-amz-meta-s3cmd-attrs') and cfg.preserve_attrs:
					attrs = _parse_attrs_header(response['headers']['x-amz-meta-s3cmd-attrs'])
					if attrs.has_key('mode'):
						os.chmod(dst_file, int(attrs['mode']))
					if attrs.has_key('mtime') or attrs.has_key('atime'):
						mtime = attrs.has_key('mtime') and int(attrs['mtime']) or int(time.time())
						atime = attrs.has_key('atime') and int(attrs['atime']) or int(time.time())
						os.utime(dst_file, (atime, mtime))
					## FIXME: uid/gid / uname/gname handling comes here! TODO
			except OSError, e:
				try: dst_stream.close()
				except: pass
				if e.errno == errno.EEXIST:
					warning(u"%s exists - not overwriting" % (dst_file))
					continue
				if e.errno in (errno.EPERM, errno.EACCES):
					warning(u"%s not writable: %s" % (dst_file, e.strerror))
					continue
				raise e
			except KeyboardInterrupt:
				try: dst_stream.close()
				except: pass
				warning(u"Exiting after keyboard interrupt")
				return
			except Exception, e:
				try: dst_stream.close()
				except: pass
				error(u"%s: %s" % (file, e))
				continue
			# We have to keep repeating this call because 
			# Python 2.4 doesn't support try/except/finally
			# construction :-(
			try: dst_stream.close()
			except: pass
		except S3DownloadError, e:
			error(u"%s: download failed too many times. Skipping that file." % file)
			continue
		speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
		if not Config().progress_meter:
			output(u"File '%s' stored as %s (%d bytes in %0.1f seconds, %0.2f %sB/s) %s" %
				(uri, dst_file, response["size"], response["elapsed"], speed_fmt[0], speed_fmt[1],
				seq_label))
		total_size += response["size"]

	total_elapsed = time.time() - timestamp_start
	speed_fmt = formatSize(total_size/total_elapsed, human_readable = True, floating_point = True)

	# Only print out the result if any work has been done or 
	# if the user asked for verbose output
	outstr = "Done. Downloaded %d bytes in %0.1f seconds, %0.2f %sB/s" % (total_size, total_elapsed, speed_fmt[0], speed_fmt[1])
	if total_size > 0:
		output(outstr)
	else:
		info(outstr)

def cmd_sync_local2remote(src, dst):
	def _build_attr_header(src):
		import pwd, grp
		attrs = {}
		src = deunicodise(src)
		st = os.stat_result(os.stat(src))
		for attr in cfg.preserve_attrs_list:
			if attr == 'uname':
				try:
					val = pwd.getpwuid(st.st_uid).pw_name
				except KeyError:
					attr = "uid"
					val = st.st_uid
					warning(u"%s: Owner username not known. Storing UID=%d instead." % (unicodise(src), val))
			elif attr == 'gname':
				try:
					val = grp.getgrgid(st.st_gid).gr_name
				except KeyError:
					attr = "gid"
					val = st.st_gid
					warning(u"%s: Owner groupname not known. Storing GID=%d instead." % (unicodise(src), val))
			else:
				val = getattr(st, 'st_' + attr)
			attrs[attr] = val
		result = ""
		for k in attrs: result += "%s:%s/" % (k, attrs[k])
		return { 'x-amz-meta-s3cmd-attrs' : result[:-1] }

	s3 = S3(cfg)

	if cfg.encrypt:
		error(u"S3cmd 'sync' doesn't support GPG encryption, sorry.")
		error(u"Either use unconditional 's3cmd put --recursive'")
		error(u"or disable encryption with --no-encrypt parameter.")
		sys.exit(1)


	src_uri = S3Uri(src)
	dst_uri = S3Uri(dst)

	loc_list = _get_filelist_local(src_uri)
	loc_count = len(loc_list)
	
	rem_list = _get_filelist_remote(dst_uri)
	rem_count = len(rem_list)

	info(u"Found %d local files, %d remote files" % (loc_count, rem_count))

	_compare_filelists(loc_list, rem_list, True)

	info(u"Summary: %d local files to upload, %d remote files to delete" % (len(loc_list), len(rem_list)))

	for file in rem_list:
		uri = S3Uri("s3://" + dst_uri.bucket()+"/"+rem_list[file]['object_key'])
		if cfg.delete_removed:
			response = s3.object_delete(uri)
			output(u"deleted '%s'" % uri)
		else:
			output(u"not-deleted '%s'" % uri)

	total_size = 0
	total_count = len(loc_list)
	total_elapsed = 0.0
	timestamp_start = time.time()
	seq = 0
	dst_base = dst_uri.uri()
	if not dst_base[-1] == "/": dst_base += "/"
	file_list = loc_list.keys()
	file_list.sort()
	for file in file_list:
		seq += 1
		src = loc_list[file]
		uri = S3Uri(dst_base + file)
		seq_label = "[%d of %d]" % (seq, total_count)
		attr_header = None
		if cfg.preserve_attrs:
			attr_header = _build_attr_header(src['full_name'])
			debug(attr_header)
		try:
			response = s3.object_put(src['full_name'], uri, attr_header, extra_label = seq_label)
		except S3UploadError, e:
			error(u"%s: upload failed too many times. Skipping that file." % src['full_name_unicode'])
			continue
		except InvalidFileError, e:
			warning(u"File can not be uploaded: %s" % e)
			continue
		speed_fmt = formatSize(response["speed"], human_readable = True, floating_point = True)
		if not cfg.progress_meter:
			output(u"File '%s' stored as %s (%d bytes in %0.1f seconds, %0.2f %sB/s) %s" %
				(src, uri, response["size"], response["elapsed"], speed_fmt[0], speed_fmt[1],
				seq_label))
		total_size += response["size"]

	total_elapsed = time.time() - timestamp_start
	total_speed = total_elapsed and total_size/total_elapsed or 0.0
	speed_fmt = formatSize(total_speed, human_readable = True, floating_point = True)

	# Only print out the result if any work has been done or 
	# if the user asked for verbose output
	outstr = "Done. Uploaded %d bytes in %0.1f seconds, %0.2f %sB/s" % (total_size, total_elapsed, speed_fmt[0], speed_fmt[1])
	if total_size > 0:
		output(outstr)
	else:
		info(outstr)

def cmd_sync(args):
	src = args.pop(0)
	dst = args.pop(0)
	if (len(args)):
		raise ParameterError("Too many parameters! Expected: %s" % commands['sync']['param'])

	if S3Uri(src).type == "s3" and not src.endswith('/'):
		src += "/"

	if not dst.endswith('/'):
		dst += "/"

	if S3Uri(src).type == "file" and S3Uri(dst).type == "s3":
		return cmd_sync_local2remote(src, dst)
	if S3Uri(src).type == "s3" and S3Uri(dst).type == "file":
		return cmd_sync_remote2local(src, dst)

def cmd_setacl(args):
	s3 = S3(cfg)

	set_to_acl = cfg.acl_public and "Public" or "Private"

	remote_keys = fetch_remote_keys(args)
	total_keys = len(remote_keys)
	seq = 0
	for key in remote_keys:
		seq += 1
		seq_label = "[%d of %d]" % (seq, total_keys)
		uri = key['remote_uri']
		acl = s3.get_acl(uri)
		debug(u"acl: %s - %r" % (uri, acl.grantees))
		if cfg.acl_public:
			if acl.isAnonRead():
				info(u"%s: already Public, skipping %s" % (uri, seq_label))
				continue
			acl.grantAnonRead()
		else:
			if not acl.isAnonRead():
				info(u"%s: already Private, skipping %s" % (uri, seq_label))
				continue
			acl.revokeAnonRead()
		retsponse = s3.set_acl(uri, acl)
		if retsponse['status'] == 200:
			output(u"%s: ACL set to %s  %s" % (uri, set_to_acl, seq_label))

def resolve_list(lst, args):
	retval = []
	for item in lst:
		retval.append(item % args)
	return retval

def gpg_command(command, passphrase = ""):
	p_in, p_out = os.popen4(command)
	if command.count("--passphrase-fd"):
		p_in.write(passphrase+"\n")
		p_in.flush()
	for line in p_out:
		info(line.strip())
	p_pid, p_exitcode = os.wait()
	return p_exitcode

def gpg_encrypt(filename):
	tmp_filename = Utils.mktmpfile()
	args = {
		"gpg_command" : cfg.gpg_command,
		"passphrase_fd" : "0",
		"input_file" : filename, 
		"output_file" : tmp_filename,
	}
	info(u"Encrypting file %(input_file)s to %(output_file)s..." % args)
	command = resolve_list(cfg.gpg_encrypt.split(" "), args)
	code = gpg_command(command, cfg.gpg_passphrase)
	return (code, tmp_filename, "gpg")

def gpg_decrypt(filename, gpgenc_header = "", in_place = True):
	tmp_filename = Utils.mktmpfile(filename)
	args = {
		"gpg_command" : cfg.gpg_command,
		"passphrase_fd" : "0",
		"input_file" : filename, 
		"output_file" : tmp_filename,
	}
	info(u"Decrypting file %(input_file)s to %(output_file)s..." % args)
	command = resolve_list(cfg.gpg_decrypt.split(" "), args)
	code = gpg_command(command, cfg.gpg_passphrase)
	if code == 0 and in_place:
		debug(u"Renaming %s to %s" % (tmp_filename, filename))
		os.unlink(filename)
		os.rename(tmp_filename, filename)
		tmp_filename = filename
	return (code, tmp_filename)

def run_configure(config_file):
	cfg = Config()
	options = [
		("access_key", "Access Key", "Access key and Secret key are your identifiers for Amazon S3"),
		("secret_key", "Secret Key"),
		("gpg_passphrase", "Encryption password", "Encryption password is used to protect your files from reading\nby unauthorized persons while in transfer to S3"),
		("gpg_command", "Path to GPG program"),
		("use_https", "Use HTTPS protocol", "When using secure HTTPS protocol all communication with Amazon S3\nservers is protected from 3rd party eavesdropping. This method is\nslower than plain HTTP and can't be used if you're behind a proxy"),
		("proxy_host", "HTTP Proxy server name", "On some networks all internet access must go through a HTTP proxy.\nTry setting it here if you can't conect to S3 directly"),
		("proxy_port", "HTTP Proxy server port"),
		]
	## Option-specfic defaults
	if getattr(cfg, "gpg_command") == "":
		setattr(cfg, "gpg_command", find_executable("gpg"))

	if getattr(cfg, "proxy_host") == "" and os.getenv("http_proxy"):
		re_match=re.match("(http://)?([^:]+):(\d+)", os.getenv("http_proxy"))
		if re_match:
			setattr(cfg, "proxy_host", re_match.groups()[1])
			setattr(cfg, "proxy_port", re_match.groups()[2])

	try:
		while 1:
			output(u"\nEnter new values or accept defaults in brackets with Enter.")
			output(u"Refer to user manual for detailed description of all options.")
			for option in options:
				prompt = option[1]
				## Option-specific handling
				if option[0] == 'proxy_host' and getattr(cfg, 'use_https') == True:
					setattr(cfg, option[0], "")
					continue
				if option[0] == 'proxy_port' and getattr(cfg, 'proxy_host') == "":
					setattr(cfg, option[0], 0)
					continue

				try:
					val = getattr(cfg, option[0])
					if type(val) is bool:
						val = val and "Yes" or "No"
					if val not in (None, ""):
						prompt += " [%s]" % val
				except AttributeError:
					pass

				if len(option) >= 3:
					output(u"\n%s" % option[2])

				val = raw_input(prompt + ": ")
				if val != "":
					if type(getattr(cfg, option[0])) is bool:
						# Turn 'Yes' into True, everything else into False
						val = val.lower().startswith('y')
					setattr(cfg, option[0], val)
			output(u"\nNew settings:")
			for option in options:
				output(u"  %s: %s" % (option[1], getattr(cfg, option[0])))
			val = raw_input("\nTest access with supplied credentials? [Y/n] ")
			if val.lower().startswith("y") or val == "":
				try:
					output(u"Please wait...")
					S3(Config()).bucket_list("", "")
					output(u"Success. Your access key and secret key worked fine :-)")

					output(u"\nNow verifying that encryption works...")
					if not getattr(cfg, "gpg_command") or not getattr(cfg, "gpg_passphrase"):
						output(u"Not configured. Never mind.")
					else:
						if not getattr(cfg, "gpg_command"):
							raise Exception("Path to GPG program not set")
						if not os.path.isfile(getattr(cfg, "gpg_command")):
							raise Exception("GPG program not found")
						filename = Utils.mktmpfile()
						f = open(filename, "w")
						f.write(os.sys.copyright)
						f.close()
						ret_enc = gpg_encrypt(filename)
						ret_dec = gpg_decrypt(ret_enc[1], ret_enc[2], False)
						hash = [
							Utils.hash_file_md5(filename),
							Utils.hash_file_md5(ret_enc[1]),
							Utils.hash_file_md5(ret_dec[1]),
						]
						os.unlink(filename)
						os.unlink(ret_enc[1])
						os.unlink(ret_dec[1])
						if hash[0] == hash[2] and hash[0] != hash[1]:
							output ("Success. Encryption and decryption worked fine :-)") 
						else:
							raise Exception("Encryption verification error.")

				except Exception, e:
					error(u"Test failed: %s" % (e))
					val = raw_input("\nRetry configuration? [Y/n] ")
					if val.lower().startswith("y") or val == "":
						continue
					

			val = raw_input("\nSave settings? [y/N] ")
			if val.lower().startswith("y"):
				break
			val = raw_input("Retry configuration? [Y/n] ")
			if val.lower().startswith("n"):
				raise EOFError()

		## Overwrite existing config file, make it user-readable only
		old_mask = os.umask(0077)
		try:
			os.remove(config_file)
		except OSError, e:
			if e.errno != errno.ENOENT:
				raise
		f = open(config_file, "w")
		os.umask(old_mask)
		cfg.dump_config(f)
		f.close()
		output(u"Configuration saved to '%s'" % config_file)

	except (EOFError, KeyboardInterrupt):
		output(u"\nConfiguration aborted. Changes were NOT saved.")
		return
	
	except IOError, e:
		error(u"Writing config file failed: %s: %s" % (config_file, e.strerror))
		sys.exit(1)

def process_exclude_from_file(exf, exclude_array):
	try:
		exfi = open(exf, "rt")
	except IOError, e:
		error(e)
		sys.exit(1)
	for ex in exfi:
		ex = ex.strip()
		if re.match("^#", ex) or re.match("^\s*$", ex):
			continue
		debug(u"adding rule: %s" % ex)
		exclude_array.append(ex)

commands = {}
commands_list = [
	{"cmd":"mb", "label":"Make bucket", "param":"s3://BUCKET", "func":cmd_bucket_create, "argc":1},
	{"cmd":"rb", "label":"Remove bucket", "param":"s3://BUCKET", "func":cmd_bucket_delete, "argc":1},
	{"cmd":"ls", "label":"List objects or buckets", "param":"[s3://BUCKET[/PREFIX]]", "func":cmd_ls, "argc":0},
	{"cmd":"la", "label":"List all object in all buckets", "param":"", "func":cmd_buckets_list_all_all, "argc":0},
	{"cmd":"put", "label":"Put file into bucket", "param":"FILE [FILE...] s3://BUCKET[/PREFIX]", "func":cmd_object_put, "argc":2},
	{"cmd":"get", "label":"Get file from bucket", "param":"s3://BUCKET/OBJECT LOCAL_FILE", "func":cmd_object_get, "argc":1},
	{"cmd":"del", "label":"Delete file from bucket", "param":"s3://BUCKET/OBJECT", "func":cmd_object_del, "argc":1},
	#{"cmd":"mkdir", "label":"Make a virtual S3 directory", "param":"s3://BUCKET/path/to/dir", "func":cmd_mkdir, "argc":1},
	{"cmd":"sync", "label":"Synchronize a directory tree to S3", "param":"LOCAL_DIR s3://BUCKET[/PREFIX] or s3://BUCKET[/PREFIX] LOCAL_DIR", "func":cmd_sync, "argc":2},
	{"cmd":"du", "label":"Disk usage by buckets", "param":"[s3://BUCKET[/PREFIX]]", "func":cmd_du, "argc":0},
	{"cmd":"info", "label":"Get various information about Buckets or Objects", "param":"s3://BUCKET[/OBJECT]", "func":cmd_info, "argc":1},
	{"cmd":"cp", "label":"Copy object", "param":"s3://BUCKET1/OBJECT1 s3://BUCKET2[/OBJECT2]", "func":cmd_cp, "argc":2},
	{"cmd":"mv", "label":"Move object", "param":"s3://BUCKET1/OBJECT1 s3://BUCKET2[/OBJECT2]", "func":cmd_mv, "argc":2},
	{"cmd":"setacl", "label":"Modify Access control list for Bucket or Object", "param":"s3://BUCKET[/OBJECT]", "func":cmd_setacl, "argc":1},
	]

def format_commands(progname):
	help = "Commands:\n"
	for cmd in commands_list:
		help += "  %s\n      %s %s %s\n" % (cmd["label"], progname, cmd["cmd"], cmd["param"])
	return help

class OptionMimeType(Option):
	def check_mimetype(option, opt, value):
		if re.compile("^[a-z0-9]+/[a-z0-9+\.-]+$", re.IGNORECASE).match(value):
			return value
		raise OptionValueError("option %s: invalid MIME-Type format: %r" % (opt, value))

	TYPES = Option.TYPES + ("mimetype",)
	TYPE_CHECKER = copy(Option.TYPE_CHECKER)
	TYPE_CHECKER["mimetype"] = check_mimetype

class MyHelpFormatter(IndentedHelpFormatter):
	def format_epilog(self, epilog):
		if epilog:
			return "\n" + epilog + "\n"
		else:
			return ""

def main():
	global cfg
	if float("%d.%d" %(sys.version_info[0], sys.version_info[1])) < 2.4:
		sys.stderr.write("ERROR: Python 2.4 or higher required, sorry.\n")
		sys.exit(1)

	## Populate "commands" from "commands_list"
	for cmd in commands_list:
		if cmd.has_key("cmd"):
			commands[cmd["cmd"]] = cmd

	default_verbosity = Config().verbosity
	optparser = OptionParser(option_class=OptionMimeType, formatter=MyHelpFormatter())
	#optparser.disable_interspersed_args()

	config_file = None
	if os.getenv("HOME"):
		config_file = os.path.join(os.getenv("HOME"), ".s3cfg")
	elif os.name == "nt" and os.getenv("USERPROFILE"):
		config_file = os.path.join(os.getenv("USERPROFILE"), "Application Data", "s3cmd.ini")

	preferred_encoding = locale.getpreferredencoding() or "UTF-8"

	optparser.set_defaults(encoding = preferred_encoding)
	optparser.set_defaults(config = config_file)
	optparser.set_defaults(verbosity = default_verbosity)

	optparser.add_option(      "--configure", dest="run_configure", action="store_true", help="Invoke interactive (re)configuration tool.")
	optparser.add_option("-c", "--config", dest="config", metavar="FILE", help="Config file name. Defaults to %default")
	optparser.add_option(      "--dump-config", dest="dump_config", action="store_true", help="Dump current configuration after parsing config files and command line options and exit.")

	#optparser.add_option("-n", "--dry-run", dest="dry_run", action="store_true", help="Only show what should be uploaded or downloaded but don't actually do it. May still perform S3 requests to get bucket listings and other information though.")

	optparser.add_option("-e", "--encrypt", dest="encrypt", action="store_true", help="Encrypt files before uploading to S3.")
	optparser.add_option(      "--no-encrypt", dest="encrypt", action="store_false", help="Don't encrypt files.")
	optparser.add_option("-f", "--force", dest="force", action="store_true", help="Force overwrite and other dangerous operations.")
	optparser.add_option(      "--continue", dest="get_continue", action="store_true", help="Continue getting a partially downloaded file (only for [get] command).")
	optparser.add_option(      "--skip-existing", dest="skip_existing", action="store_true", help="Skip over files that exist at the destination (only for [get] and [sync] commands).")
	optparser.add_option("-r", "--recursive", dest="recursive", action="store_true", help="Recursive upload, download or removal.")
	optparser.add_option("-P", "--acl-public", dest="acl_public", action="store_true", help="Store objects with ACL allowing read for anyone.")
	optparser.add_option(      "--acl-private", dest="acl_public", action="store_false", help="Store objects with default ACL allowing access for you only.")
	optparser.add_option(      "--delete-removed", dest="delete_removed", action="store_true", help="Delete remote objects with no corresponding local file [sync]")
	optparser.add_option(      "--no-delete-removed", dest="delete_removed", action="store_false", help="Don't delete remote objects.")
	optparser.add_option("-p", "--preserve", dest="preserve_attrs", action="store_true", help="Preserve filesystem attributes (mode, ownership, timestamps). Default for [sync] command.")
	optparser.add_option(      "--no-preserve", dest="preserve_attrs", action="store_false", help="Don't store FS attributes")
	optparser.add_option(      "--exclude", dest="exclude", action="append", metavar="GLOB", help="Filenames and paths matching GLOB will be excluded from sync")
	optparser.add_option(      "--exclude-from", dest="exclude_from", action="append", metavar="FILE", help="Read --exclude GLOBs from FILE")
	optparser.add_option(      "--rexclude", dest="rexclude", action="append", metavar="REGEXP", help="Filenames and paths matching REGEXP (regular expression) will be excluded from sync")
	optparser.add_option(      "--rexclude-from", dest="rexclude_from", action="append", metavar="FILE", help="Read --rexclude REGEXPs from FILE")
	optparser.add_option(      "--debug-syncmatch", "--debug-exclude", dest="debug_syncmatch", action="store_true", help="Output detailed information about remote vs. local filelist matching and --exclude processing and then exit")

	optparser.add_option(      "--bucket-location", dest="bucket_location", help="Datacentre to create bucket in. Either EU or US (default)")

	optparser.add_option("-m", "--mime-type", dest="default_mime_type", type="mimetype", metavar="MIME/TYPE", help="Default MIME-type to be set for objects stored.")
	optparser.add_option("-M", "--guess-mime-type", dest="guess_mime_type", action="store_true", help="Guess MIME-type of files by their extension. Falls back to default MIME-Type as specified by --mime-type option")

	optparser.add_option(      "--encoding", dest="encoding", metavar="ENCODING", help="Override autodetected terminal and filesystem encoding (character set). Autodetected: %s" % preferred_encoding)

	optparser.add_option("-H", "--human-readable-sizes", dest="human_readable_sizes", action="store_true", help="Print sizes in human readable form.")

	optparser.add_option(      "--progress", dest="progress_meter", action="store_true", help="Display progress meter (default on TTY).")
	optparser.add_option(      "--no-progress", dest="progress_meter", action="store_false", help="Don't display progress meter (default on non-TTY).")
	optparser.add_option("-v", "--verbose", dest="verbosity", action="store_const", const=logging.INFO, help="Enable verbose output.")
	optparser.add_option("-d", "--debug", dest="verbosity", action="store_const", const=logging.DEBUG, help="Enable debug output.")
	optparser.add_option(      "--version", dest="show_version", action="store_true", help="Show s3cmd version (%s) and exit." % (PkgInfo.version))

	optparser.set_usage(optparser.usage + " COMMAND [parameters]")
	optparser.set_description('S3cmd is a tool for managing objects in '+
		'Amazon S3 storage. It allows for making and removing '+
		'"buckets" and uploading, downloading and removing '+
		'"objects" from these buckets.')
	optparser.epilog = format_commands(optparser.get_prog_name())
	optparser.epilog += ("\nSee program homepage for more information at\n%s\n" % PkgInfo.url)

	(options, args) = optparser.parse_args()

	## Some mucking with logging levels to enable 
	## debugging/verbose output for config file parser on request
	logging.basicConfig(level=options.verbosity,
	                    format='%(levelname)s: %(message)s',
	                    stream = sys.stderr)
	
	if options.show_version:
		output(u"s3cmd version %s" % PkgInfo.version)
		sys.exit(0)

	## Now finally parse the config file
	if not options.config:
		error(u"Can't find a config file. Please use --config option.")
		sys.exit(1)

	try:
		cfg = Config(options.config)
	except IOError, e:
		if options.run_configure:
			cfg = Config()
		else:
			error(u"%s: %s"  % (options.config, e.strerror))
			error(u"Configuration file not available.")
			error(u"Consider using --configure parameter to create one.")
			sys.exit(1)

	## And again some logging level adjustments
	## according to configfile and command line parameters
	if options.verbosity != default_verbosity:
		cfg.verbosity = options.verbosity
	logging.root.setLevel(cfg.verbosity)

	## Default to --progress on TTY devices, --no-progress elsewhere
	## Can be overriden by actual --(no-)progress parameter
	cfg.update_option('progress_meter', sys.stdout.isatty())

	## Unsupported features on Win32 platform
	if os.name == "nt":
		if cfg.preserve_attrs:
			error(u"Option --preserve is not yet supported on MS Windows platform. Assuming --no-preserve.")
			cfg.preserve_attrs = False
		if cfg.progress_meter:
			error(u"Option --progress is not yet supported on MS Windows platform. Assuming --no-progress.")
			cfg.progress_meter = False

	## Update Config with other parameters
	for option in cfg.option_list():
		try:
			if getattr(options, option) != None:
				debug(u"Updating %s -> %s" % (option, getattr(options, option)))
				cfg.update_option(option, getattr(options, option))
		except AttributeError:
			## Some Config() options are not settable from command line
			pass

	## Set output and filesystem encoding for printing out filenames.
	sys.stdout = codecs.getwriter(cfg.encoding)(sys.stdout, "replace")
	sys.stderr = codecs.getwriter(cfg.encoding)(sys.stderr, "replace")

	## Process GLOB (shell wildcard style) excludes
	if options.exclude is None:
		options.exclude = []

	if options.exclude_from:
		for exf in options.exclude_from:
			debug(u"processing --exclude-from %s" % exf)
			process_exclude_from_file(exf, options.exclude)

	if options.exclude:
		for ex in options.exclude:
			debug(u"processing rule: %s" % ex)
			exc = re.compile(glob.fnmatch.translate(ex))
			cfg.exclude.append(exc)
			if options.debug_syncmatch:
				cfg.debug_exclude[exc] = ex

	## Process REGEXP style excludes
	if options.rexclude is None:
		options.rexclude = []

	if options.rexclude_from:
		for exf in options.rexclude_from:
			debug(u"processing --rexclude-from %s" % exf)
			process_exclude_from_file(exf, options.rexclude)

	if options.rexclude:
		for ex in options.rexclude:
			debug(u"processing rule: %s" % ex)
			exc = re.compile(ex)
			cfg.exclude.append(exc)
			if options.debug_syncmatch:
				cfg.debug_exclude[exc] = ex

	if cfg.encrypt and cfg.gpg_passphrase == "":
		error(u"Encryption requested but no passphrase set in config file.")
		error(u"Please re-run 's3cmd --configure' and supply it.")
		sys.exit(1)

	if options.dump_config:
		cfg.dump_config(sys.stdout)
		sys.exit(0)

	if options.run_configure:
		run_configure(options.config)
		sys.exit(0)

	if len(args) < 1:
		error(u"Missing command. Please run with --help for more information.")
		sys.exit(1)

	## Unicodise all remaining arguments:
	args = [unicodise(arg) for arg in args]

	command = args.pop(0)
	try:
		debug(u"Command: %s" % commands[command]["cmd"])
		## We must do this lookup in extra step to 
		## avoid catching all KeyError exceptions
		## from inner functions.
		cmd_func = commands[command]["func"]
	except KeyError, e:
		error(u"Invalid command: %s" % e)
		sys.exit(1)

	if len(args) < commands[command]["argc"]:
		error(u"Not enough paramters for command '%s'" % command)
		sys.exit(1)

	try:
		cmd_func(args)
	except S3Error, e:
		error(u"S3 error: %s" % e)
		if e.info.has_key("Message"):
			error(e.info['Message'])
		sys.exit(1)
	except ParameterError, e:
		error(u"Parameter problem: %s" % e)
		sys.exit(1)

if __name__ == '__main__':
	try:
		## Our modules
		## Keep them in try/except block to 
		## detect any syntax errors in there
		from S3 import PkgInfo
		from S3.S3 import *
		from S3.Config import Config
		from S3.S3Uri import *
		from S3 import Utils
		from S3.Exceptions import *
		from S3.Utils import unicodise
		from S3.Progress import Progress

		main()
		sys.exit(0)

	except SystemExit, e:
		sys.exit(e.code)

	except KeyboardInterrupt:
		sys.stderr.write("See ya!\n")
		sys.exit(1)

	except Exception, e:
		sys.stderr.write("""
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    An unexpected error has occurred.
  Please report the following lines to:
   s3tools-bugs@lists.sourceforge.net
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

""")
		tb = traceback.format_exc(sys.exc_info())
		e_class = str(e.__class__)
		e_class = e_class[e_class.rfind(".")+1 : -2]
		sys.stderr.write(u"Problem: %s: %s\n" % (e_class, e))
		try:
			sys.stderr.write("S3cmd:   %s\n" % PkgInfo.version)
		except NameError:
			sys.stderr.write("S3cmd:   unknown version. Module import problem?\n")
		sys.stderr.write("Python:  %s\n" % sys.version.replace('\n', ' '))
		sys.stderr.write("\n")
		sys.stderr.write(unicode(tb, errors="replace"))
		if type(e) == ImportError:
			sys.stderr.write("\n")
			sys.stderr.write("Your sys.path contains these entries:\n")
			for path in sys.path:
				sys.stderr.write(u"\t%s\n" % path)
			sys.stderr.write("Now the question is where has S3/S3.py been installed?\n")
		sys.stderr.write("""
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    An unexpected error has occurred.
    Please report the above lines to:
   s3tools-bugs@lists.sourceforge.net
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
""")
		sys.exit(1)