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132 lines
4.3 KiB
Python
132 lines
4.3 KiB
Python
# Copyright 2011 Google Inc. All Rights Reserved.
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# Copyright 2011, Nexenta Systems Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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from gslib.command import Command
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from gslib.command import COMMAND_NAME
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from gslib.command import COMMAND_NAME_ALIASES
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from gslib.command import CONFIG_REQUIRED
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from gslib.command import FILE_URIS_OK
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from gslib.command import MAX_ARGS
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from gslib.command import MIN_ARGS
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from gslib.command import PROVIDER_URIS_OK
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from gslib.command import SUPPORTED_SUB_ARGS
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from gslib.command import URIS_START_ARG
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from gslib.exception import CommandException
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from gslib.help_provider import HELP_NAME
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from gslib.help_provider import HELP_NAME_ALIASES
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from gslib.help_provider import HELP_ONE_LINE_SUMMARY
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from gslib.help_provider import HELP_TEXT
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from gslib.help_provider import HelpType
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from gslib.help_provider import HELP_TYPE
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from gslib.util import NO_MAX
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from gslib.wildcard_iterator import ContainsWildcard
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_detailed_help_text = ("""
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<B>SYNOPSIS</B>
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gsutil cat [-h] uri...
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<B>DESCRIPTION</B>
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The cat command outputs the contents of one or more URIs to stdout.
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It is equivalent to doing:
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gsutil cp uri... -
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(The final '-' causes gsutil to stream the output to stdout.)
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<B>OPTIONS</B>
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-h Prints short header for each object. For example:
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gsutil cat -h gs://bucket/meeting_notes/2012_Feb/*.txt
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""")
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class CatCommand(Command):
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"""Implementation of gsutil cat command."""
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# Command specification (processed by parent class).
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command_spec = {
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# Name of command.
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COMMAND_NAME : 'cat',
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# List of command name aliases.
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COMMAND_NAME_ALIASES : [],
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# Min number of args required by this command.
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MIN_ARGS : 0,
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# Max number of args required by this command, or NO_MAX.
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MAX_ARGS : NO_MAX,
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# Getopt-style string specifying acceptable sub args.
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SUPPORTED_SUB_ARGS : 'hv',
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# True if file URIs acceptable for this command.
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FILE_URIS_OK : False,
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# True if provider-only URIs acceptable for this command.
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PROVIDER_URIS_OK : False,
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# Index in args of first URI arg.
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URIS_START_ARG : 0,
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# True if must configure gsutil before running command.
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CONFIG_REQUIRED : True,
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}
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help_spec = {
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# Name of command or auxiliary help info for which this help applies.
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HELP_NAME : 'cat',
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# List of help name aliases.
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HELP_NAME_ALIASES : [],
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# Type of help:
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HELP_TYPE : HelpType.COMMAND_HELP,
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# One line summary of this help.
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HELP_ONE_LINE_SUMMARY : 'Concatenate object content to stdout',
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# The full help text.
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HELP_TEXT : _detailed_help_text,
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}
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# Command entry point.
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def RunCommand(self):
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show_header = False
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if self.sub_opts:
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for o, unused_a in self.sub_opts:
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if o == '-h':
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show_header = True
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elif o == '-v':
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self.THREADED_LOGGER.info('WARNING: The %s -v option is no longer'
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' needed, and will eventually be removed.\n'
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% self.command_name)
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printed_one = False
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# We manipulate the stdout so that all other data other than the Object
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# contents go to stderr.
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cat_outfd = sys.stdout
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sys.stdout = sys.stderr
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did_some_work = False
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for uri_str in self.args:
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for uri in self.WildcardIterator(uri_str).IterUris():
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if not uri.names_object():
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raise CommandException('"%s" command must specify objects.' %
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self.command_name)
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did_some_work = True
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if show_header:
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if printed_one:
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print
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print '==> %s <==' % uri.__str__()
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printed_one = True
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key = uri.get_key(False, self.headers)
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key.get_file(cat_outfd, self.headers)
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sys.stdout = cat_outfd
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if not did_some_work:
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raise CommandException('No URIs matched')
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return 0
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