Example #1
0
def parse_cli():
    description = 'Utility routines for working with BDBags'

    parser = argparse.ArgumentParser(
        description=description,
        epilog="For more information see: http://github.com/fair-research/bdbag"
    )

    parser.add_argument('--quiet',
                        action="store_true",
                        help="Suppress logging output.")

    parser.add_argument('--debug',
                        action="store_true",
                        help="Enable debug logging output.")

    subparsers = parser.add_subparsers(dest="subparser",
                                       help="sub-command help")
    create_crfm_fs_subparser(subparsers)
    create_crfm_file_subparser(subparsers)
    create_crfm_urls_subparser(subparsers)

    args = parser.parse_args()

    bdb.configure_logging(level=logging.ERROR if args.quiet else (
        logging.DEBUG if args.debug else logging.INFO))

    return args, parser
Example #2
0
def main(argv):
    parser = argparse.ArgumentParser(description='Program to create a BDBag containing a set of Minids for remote content')
    parser.add_argument('-m', '--minids', metavar='<minid file>',
                        help='File listing Minids for new bag', required=True)
    parser.add_argument('-b', '--bagname', metavar='<bag name>',
                        help='Name of directory for new bag.', required=True)
    parser.add_argument('-v', '--verify', action='store_true',
                        help='Validate bag after building it.', required=False)
    parser.add_argument('-q', '--quiet', action="store_true", help="Suppress logging output.")
    parser.add_argument('-d', '--debug', action="store_true", help="Enable debug logging output.")
    parser.add_argument('-n', '--author-name', metavar="<person or entity name>",
        help="Optional name of the person or entity responsible for the creation of this bag, "
             "for inclusion in the bag metadata.")
    parser.add_argument('-o', '--author-orcid', metavar="<orcid>",
        help="Optional ORCID identifier of the bag creator, for inclusion in the bag metadata.")
    args = parser.parse_args()
   
    bdb.configure_logging(level=logging.ERROR if args.quiet else (logging.DEBUG if args.debug else logging.INFO))

    # Create the directory that will hold the new BDBag
    bdb.ensure_bag_path_exists(args.bagname)

    # For each supplied minid, fetch sub-bag to determine its properties
    minid_fields = extract_fields(args.minids)

    # Create 'README' file in the newly created bag directory. (moved to 'data' when bag is created)
    write_readme(args.bagname, minid_fields)

    # Create remote_file_manifest_file, to be used by make_bag
    working_dir = temp_path = tempfile.mkdtemp(prefix='encode2bag_')
    remote_file_manifest_file = osp.abspath(osp.join(working_dir, 'remote-file-manifest.json'))
    generate_remote_manifest_file(minid_fields, remote_file_manifest_file)

    # Create the new bag based on the supplied remote manifest file
    bag = bdb.make_bag(args.bagname,
                       algs=['md5', 'sha256'],
                       remote_file_manifest=remote_file_manifest_file)

    # Create metadata/manifest.json file with Research Object JSON object
    ro_manifest = ro.init_ro_manifest(author_name=args.author_name, author_orcid=args.author_orcid,
        creator_name = 'bagofbags using BDBag version: %s (Bagit version: %s)' % (VERSION, BAGIT_VERSION),
        creator_uri='https://github.com/fair-research/bdbag/examples/bagofbags/')
    add_remote_file_manifest_to_ro(ro_manifest, minid_fields)
    ro.write_bag_ro_metadata(ro_manifest, args.bagname, 'manifest.json')

    # Run make_bag again to include manifest.json in the checksums etc.
    bdb.make_bag(args.bagname, update=True)

    if args.verify:
        bdb.resolve_fetch(args.bagname, force=True) 
        bdb.validate_bag(args.bagname, fast=False, callback=None)
Example #3
0
def parse_cli():
    description = 'BDBag utility for working with Bagit/RO archives'

    parser = argparse.ArgumentParser(
        description=description,
        epilog="For more information see: http://github.com/fair-research/bdbag"
    )

    parser.add_argument('--version', action='version', version=VERSION)

    standard_args = parser.add_argument_group('Bag arguments')

    update_arg = "--update"
    standard_args.add_argument(
        update_arg,
        action="store_true",
        help=
        "Update an existing bag dir, regenerating manifests and fetch.txt if necessary."
    )

    revert_arg = "--revert"
    standard_args.add_argument(
        revert_arg,
        action="store_true",
        help=
        "Revert an existing bag directory back to a normal directory, deleting all bag metadata files. "
        "Payload files in the \'data\' directory will be moved back to the directory root, and the \'data\' "
        "directory will be deleted.")

    archiver_arg = "--archiver"
    standard_args.add_argument(
        archiver_arg,
        choices=['zip', 'tar', 'tgz'],
        help="Archive a bag using the specified format.")

    checksum_arg = "--checksum"
    standard_args.add_argument(
        checksum_arg,
        action='append',
        choices=['md5', 'sha1', 'sha256', 'sha512', 'all'],
        help=
        "Checksum algorithm to use: can be specified multiple times with different values. "
        "If \'all\' is specified, every supported checksum will be generated")

    skip_manifests_arg = "--skip-manifests"
    standard_args.add_argument(
        skip_manifests_arg,
        action='store_true',
        help=str(
            "If \'skip-manifests\' is specified in conjunction with %s, only tagfile manifests will be "
            "regenerated, with payload manifests and fetch.txt (if any) left as is. This argument should be used "
            "when only bag metadata has changed." % update_arg))

    prune_manifests_arg = "--prune-manifests"
    standard_args.add_argument(
        prune_manifests_arg,
        action='store_true',
        help=
        "If specified, any existing checksum manifests not explicitly configured via either"
        " the \"checksum\" argument(s) or configuration file will be deleted from the bag during an update."
    )

    fetch_arg = "--resolve-fetch"
    standard_args.add_argument(
        fetch_arg,
        "--fetch",
        choices=['all', 'missing'],
        help="Download remote files listed in the bag's fetch.txt file. "
        "The \"missing\" option only attempts to fetch files that do not "
        "already exist in the bag payload directory. "
        "The \"all\" option causes all fetch files to be re-acquired,"
        " even if they already exist in the bag payload directory.")

    fetch_filter_arg = "--fetch-filter"
    standard_args.add_argument(
        fetch_filter_arg,
        metavar="<column><operator><value>",
        help=
        "A simple expression of the form <column><operator><value> where: <column> is the name of a column in "
        "the bag's fetch.txt to be filtered on, <operator> is one of the following tokens; %s, and <value> is a "
        "string pattern or integer to be filtered against." % FILTER_DOCSTRING)

    validate_arg = "--validate"
    standard_args.add_argument(
        validate_arg,
        choices=['fast', 'full', 'structure'],
        help=
        "Validate a bag directory or bag archive. If \"fast\" is specified, Payload-Oxum (if present) will be "
        "used to check that the payload files are present and accounted for. If \"full\" is specified, "
        "all checksums will be regenerated and compared to the corresponding entries in the manifest. "
        "If \"structure\" is specified, the bag will be checked for structural validity only."
    )

    validate_profile_arg = "--validate-profile"
    standard_args.add_argument(
        validate_profile_arg,
        action="store_true",
        help="Validate a bag against the profile specified by the bag's "
        "\"BagIt-Profile-Identifier\" metadata field, if present.")

    config_file_arg = "--config-file"
    standard_args.add_argument(
        config_file_arg,
        default=DEFAULT_CONFIG_FILE,
        metavar='<file>',
        help=
        "Optional path to a configuration file. If this argument is not specified, the configuration file "
        "defaults to: %s " % DEFAULT_CONFIG_FILE)

    keychain_file_arg = "--keychain-file"
    standard_args.add_argument(
        keychain_file_arg,
        default=DEFAULT_KEYCHAIN_FILE,
        metavar='<file>',
        help=
        "Optional path to a keychain file. If this argument is not specified, the keychain file "
        "defaults to: %s " % DEFAULT_KEYCHAIN_FILE)

    metadata_file_arg = "--metadata-file"
    standard_args.add_argument(
        metadata_file_arg,
        metavar='<file>',
        help="Optional path to a JSON formatted metadata file")

    ro_metadata_file_arg = "--ro-metadata-file"
    standard_args.add_argument(
        ro_metadata_file_arg,
        metavar='<file>',
        help="Optional path to a JSON formatted RO metadata file")

    ro_manifest_generate_arg = "--ro-manifest-generate"
    standard_args.add_argument(
        ro_manifest_generate_arg,
        choices=['overwrite', 'update'],
        help=
        "Automatically generate a basic RO metadata manifest.json file by introspecting a bag's metadata and "
        "structure.")

    remote_file_manifest_arg = "--remote-file-manifest"
    standard_args.add_argument(
        remote_file_manifest_arg,
        metavar='<file>',
        help=
        "Optional path to a JSON formatted remote file manifest configuration file used to add remote file entries"
        " to the bag manifest(s) and create the bag fetch.txt file.")

    standard_args.add_argument('--quiet',
                               action="store_true",
                               help="Suppress logging output.")

    standard_args.add_argument('--debug',
                               action="store_true",
                               help="Enable debug logging output.")

    standard_args.add_argument(
        'path',
        metavar="<path>",
        help="Path to a bag directory or bag archive file.")

    metadata_args = parser.add_argument_group('Bag metadata arguments')
    headers = list(bagit.STANDARD_BAG_INFO_HEADERS)
    headers.append("Contact-Orcid")
    for header in sorted(headers):
        metadata_args.add_argument('--%s' % header.lower(),
                                   action=AddMetadataAction)

    args = parser.parse_args()

    bdb.configure_logging(level=logging.ERROR if args.quiet else (
        logging.DEBUG if args.debug else logging.INFO))

    path = os.path.abspath(args.path)
    if not os.path.exists(path):
        sys.stderr.write("Error: file or directory not found: %s\n\n" % path)
        sys.exit(2)

    is_file = os.path.isfile(path)
    if args.archiver and is_file:
        sys.stderr.write(
            "Error: A bag archive cannot be created from an existing bag archive.\n\n"
        )
        sys.exit(2)

    if args.checksum and is_file:
        sys.stderr.write(
            "Error: A checksum manifest cannot be added to an existing bag archive. "
            "The bag must be extracted, updated, and re-archived.\n\n")
        sys.exit(2)

    if args.update and is_file:
        sys.stderr.write(
            "Error: An existing bag archive cannot be updated in-place. "
            "The bag must first be extracted and then updated.\n\n")
        sys.exit(2)

    if args.revert and is_file:
        sys.stderr.write(
            "Error: An existing bag archive cannot be reverted in-place. "
            "The bag must first be extracted and then reverted.\n\n")
        sys.exit(2)

    if args.fetch_filter and not args.resolve_fetch:
        sys.stderr.write(
            "Error: The %s argument can only be used with the %s argument.\n\n"
            % (fetch_filter_arg, fetch_arg))
        sys.exit(2)

    if args.resolve_fetch and is_file:
        sys.stderr.write(
            "Error: It is not possible to resolve remote files directly into a bag archive. "
            "The bag must first be extracted before the %s argument can be specified.\n\n"
            % fetch_arg)
        sys.exit(2)

    if args.update and args.resolve_fetch:
        sys.stderr.write(
            "Error: The %s argument is not compatible with the %s argument.\n\n"
            % (update_arg, fetch_arg))
        sys.exit(2)

    if args.remote_file_manifest and args.resolve_fetch:
        sys.stderr.write(
            "Error: The %s argument is not compatible with the %s argument.\n\n"
            % (remote_file_manifest_arg, fetch_arg))
        sys.exit(2)

    is_bag = bdb.is_bag(path)
    if args.checksum and not args.update and is_bag:
        sys.stderr.write(
            "Error: Specifying %s for an existing bag requires the %s argument in order "
            "to apply any changes.\n\n" % (checksum_arg, update_arg))
        sys.exit(2)

    if args.remote_file_manifest and not args.update and is_bag:
        sys.stderr.write(
            "Error: Specifying %s for an existing bag requires the %s argument in order "
            "to apply any changes.\n\n" %
            (remote_file_manifest_arg, update_arg))
        sys.exit(2)

    if args.metadata_file and not args.update and is_bag:
        sys.stderr.write(
            "Error: Specifying %s for an existing bag requires the %s argument in order "
            "to apply any changes.\n\n" % (metadata_file_arg, update_arg))
        sys.exit(2)

    if args.ro_metadata_file and not args.update and is_bag:
        sys.stderr.write(
            "Error: Specifying %s for an existing bag requires the %s argument in order "
            "to apply any changes.\n\n" % (ro_metadata_file_arg, update_arg))
        sys.exit(2)

    if args.prune_manifests and not args.update and is_bag:
        sys.stderr.write(
            "Error: Specifying %s for an existing bag requires the %s argument in order "
            "to apply any changes.\n\n" % (prune_manifests_arg, update_arg))
        sys.exit(2)

    if args.skip_manifests and not args.update and is_bag:
        sys.stderr.write("Error: Specifying %s requires the %s argument.\n\n" %
                         (skip_manifests_arg, update_arg))
        sys.exit(2)

    if BAG_METADATA and not args.update and is_bag:
        sys.stderr.write(
            "Error: Adding or modifying metadata %s for an existing bag requires the %s argument "
            "in order to apply any changes.\n\n" % (BAG_METADATA, update_arg))
        sys.exit(2)

    if args.revert and not is_bag:
        sys.stderr.write(
            "Error: The directory %s is not a bag and therefore cannot be reverted.\n\n"
            % path)
        sys.exit(2)

    if args.revert and args.update and is_bag:
        sys.stderr.write(
            "Error: The %s argument is not compatible with the %s argument.\n\n"
            % (revert_arg, update_arg))
        sys.exit(2)

    return args, is_bag, is_file
Example #4
0
def parse_cli():
    description = 'Utility routines for working with BDBags'

    parser = argparse.ArgumentParser(
        description=description,
        epilog="For more information see: http://github.com/fair-research/bdbag"
    )

    parser.add_argument('--quiet',
                        action="store_true",
                        help="Suppress logging output.")

    parser.add_argument('--debug',
                        action="store_true",
                        help="Enable debug logging output.")

    subparsers = parser.add_subparsers(dest="subparser",
                                       help="sub-command help")

    parser_crfm = \
        subparsers.add_parser('create-rfm',
                              description="Create a remote file manifest by recursively scanning a directory.",
                              help='create-rfm help')

    parser_crfm.add_argument(
        'input_path',
        metavar="<input path>",
        help="Path to a directory tree which will be traversed for input files."
    )

    parser_crfm.add_argument(
        'output_file',
        metavar="<output file>",
        help=
        "Path of the filename where the remote file manifest will be written.")

    checksum_arg = parser_crfm.add_argument(
        "--checksum",
        action='append',
        required=True,
        choices=['md5', 'sha1', 'sha256', 'sha512', 'all'],
        help=
        "Checksum algorithm to use: can be specified multiple times with different values. "
        "If \'all\' is specified, every supported checksum will be generated")

    base_payload_path_arg = parser_crfm.add_argument(
        '--base-payload-path',
        metavar="<url>",
        help=
        "An optional path prefix to prepend to each relative file path found while walking the input directory "
        "tree. All files will be rooted under this base directory path in any bag created from this manifest."
    )

    base_url_arg = parser_crfm.add_argument(
        '--base-url',
        metavar="<url>",
        required=True,
        help=
        "A URL root to prepend to each file listed in the manifest. Can be used to generate fetch URL "
        "fields dynamically.")

    #    url_map_arg = parser_crfm.add_argument(
    #        '--url-map-file', metavar="<path>",
    #        help="Path to a JSON formatted file that maps file relative paths to URLs.")

    url_formatter_arg = parser_crfm.add_argument(
        "--url-formatter",
        choices=['none', 'append-path', 'append-filename'],
        default='none',
        help="Format function for generating remote file URLs. "
        "If \'append-path\' is specified, the existing relative path including the filename will be appended to"
        " the %s argument. If \'append-path\' is specified, only the filename will be appended. If \"none\" is "
        "specified, the %s argument will be used as-is." %
        (base_url_arg.option_strings, base_url_arg.option_strings))

    streaming_json_arg = parser_crfm.add_argument(
        "--streaming-json",
        action='store_true',
        default=False,
        help=str(
            "If \'streaming-json\' is specified, one JSON tuple object per line will be output to the output file."
            "Enable this option if the default behavior produces a file that is prohibitively large to parse "
            "entirely into system memory."))

    parser_crfm.set_defaults(func=create_remote_file_manifest)

    parser_grfm = \
        subparsers.add_parser('generate-rfm',
                              description="Generate a remote file manifest by from a list of HTTP(S) URLs by issuing "
                                          "HTTP HEAD requests for Content-Length, Content-Disposition, and Content-MD5 "
                                          "headers for each URL",
                              help='generate-rfm help')

    parser_grfm.add_argument(
        'input_file',
        metavar="<input file>",
        help=
        "Path to a newline delimited list of URLs that will be used to generate the remote file manifest."
    )

    parser_grfm.add_argument(
        'output_file',
        metavar="<output file>",
        help=
        "Path of the filename where the remote file manifest will be written.")

    parser_grfm.add_argument(
        '--keychain-file',
        default=DEFAULT_KEYCHAIN_FILE,
        metavar='<file>',
        help=
        "Optional path to a keychain file. If this argument is not specified, the keychain file "
        "defaults to: %s " % DEFAULT_KEYCHAIN_FILE)

    grfm_base_payload_path_arg = parser_grfm.add_argument(
        '--base-payload-path',
        metavar="<url>",
        help=
        "An optional path prefix to prepend to each relative file path found while querying each URL for metadata."
        " All files will be rooted under this base directory path in any bag created from this manifest."
    )

    #    grfm_url_map_arg = parser_grfm.add_argument(
    #        '--url-map-file', metavar="<path>",
    #        help="Path to a JSON formatted file that maps file relative paths to URLs.")

    parser_grfm.add_argument(
        '--preserve-url-path',
        default=False,
        action="store_true",
        help="Preserve the URL file path in the local payload.")

    grfm_streaming_json_arg = parser_grfm.add_argument(
        "--streaming-json",
        action='store_true',
        default=False,
        help=str(
            "If \'streaming-json\' is specified, one JSON tuple object per line will be output to the output file."
            "Enable this option if the default behavior produces a file that is prohibitively large to parse "
            "entirely into system memory."))

    parser_grfm.set_defaults(func=generate_remote_file_manifest)

    args = parser.parse_args()

    bdb.configure_logging(level=logging.ERROR if args.quiet else (
        logging.DEBUG if args.debug else logging.INFO))

    return args, parser
Example #5
0
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import os
import gc
import sys
import shutil
import tempfile
import unittest
import logging
from bdbag.bdbag_api import configure_logging
from bdbag.bdbagit import open_text_file

configure_logging(logpath='test.log', filemode='w', level=logging.DEBUG)


class BaseTest(unittest.TestCase):
    def setUp(self):

        if sys.version_info < (3, ):
            self.assertRaisesRegex = self.assertRaisesRegexp

        self.tmpdir = tempfile.mkdtemp(prefix="bdbag_test_")
        shutil.copytree(os.path.abspath(os.path.join('test-data')),
                        os.path.join(self.tmpdir, 'test-data'))

        self.test_data_dir = os.path.join(self.tmpdir, 'test-data', 'test-dir')
        self.assertTrue(os.path.isdir(self.test_data_dir))
        self.test_archive_dir = os.path.join(self.tmpdir, 'test-data',
Example #6
0
def parse_cli():
    description = 'BD2K BDBag utility for working with Bagit/RO archives'

    parser = argparse.ArgumentParser(
        description=description, epilog="For more information see: http://github.com/ini-bdds/bdbag")
    standard_args = parser.add_argument_group('Standard arguments')

    update_arg = standard_args.add_argument(
        '--update', action="store_true",
        help="Update an existing bag dir, regenerating manifests and fetch.txt if necessary.")

    standard_args.add_argument(
        "--archiver", choices=['zip', 'tar', 'tgz'], help="Archive a bag using the specified format.")

    checksum_arg = standard_args.add_argument(
        "--checksum", action='append', choices=['md5', 'sha1', 'sha256', 'sha512', 'all'],
        help="Checksum algorithm to use: can be specified multiple times with different values. "
             "If \'all\' is specified, every supported checksum will be generated")

    skip_manifests_arg = standard_args.add_argument(
        "--skip-manifests", action='store_true',
        help=str("If \'skip-manifests\' is specified in conjunction with %s, only tagfile manifests will be "
                 "regenerated, with payload manifests and fetch.txt (if any) left as is. This argument should be used "
                 "when only bag metadata has changed." % update_arg.option_strings))

    prune_manifests_arg = standard_args.add_argument(
        "--prune-manifests", action='store_true',
        help="If specified, any existing checksum manifests not explicitly configured via either"
             " the \"checksum\" argument(s) or configuration file will be deleted from the bag during an update.")

    fetch_arg = standard_args.add_argument(
        '--resolve-fetch', choices=['all', 'missing'],
        help="Download remote files listed in the bag's fetch.txt file. "
             "The \"missing\" option only attempts to fetch files that do not "
             "already exist in the bag payload directory. "
             "The \"all\" option causes all fetch files to be re-acquired,"
             " even if they already exist in the bag payload directory.")

    standard_args.add_argument(
        '--validate', choices=['fast', 'full'],
        help="Validate a bag directory or bag archive. If \"fast\" is specified, Payload-Oxum (if present) will be "
             "used to check that the payload files are present and accounted for. Otherwise if \"full\" is specified, "
             "all checksums will be regenerated and compared to the corresponding entries in the manifest")

    standard_args.add_argument(
        '--validate-profile', action="store_true",
        help="Validate a bag against the profile specified by the bag's "
             "\"BagIt-Profile-Identifier\" metadata field, if present.")

    standard_args.add_argument(
        '--config-file', default=DEFAULT_CONFIG_FILE, metavar='<file>',
        help="Optional path to a configuration file. If this argument is not specified, the configuration file "
             "defaults to: %s " % DEFAULT_CONFIG_FILE)

    metadata_file_arg = standard_args.add_argument(
        '--metadata-file', metavar='<file>', help="Optional path to a JSON formatted metadata file")

    remote_file_manifest_arg = standard_args.add_argument(
        '--remote-file-manifest', metavar='<file>',
        help="Optional path to a JSON formatted remote file manifest configuration file used to add remote file entries"
             " to the bag manifest(s) and create the bag fetch.txt file.")

    standard_args.add_argument(
        '--quiet', action="store_true", help="Suppress logging output.")

    standard_args.add_argument(
        '--debug', action="store_true", help="Enable debug logging output.")

    standard_args.add_argument(
        '--bag-path', metavar="<path>", required=True,
        help="Path to a bag directory or bag archive file.")

    metadata_args = parser.add_argument_group('Bag metadata arguments')
    for header in bagit.STANDARD_BAG_INFO_HEADERS:
        metadata_args.add_argument('--%s' % header.lower(), action=AddMetadataAction)

    args = parser.parse_args()

    bdb.configure_logging(level=logging.ERROR if args.quiet else (logging.DEBUG if args.debug else logging.INFO))

    path = os.path.abspath(args.bag_path)
    if not os.path.exists(path):
        sys.stderr.write("Error: file or directory not found: %s\n\n" % path)
        sys.exit(2)

    is_file = os.path.isfile(path)
    if args.archiver and is_file:
        sys.stderr.write("Error: A bag archive cannot be created from an existing bag archive.\n\n")
        sys.exit(2)

    if args.checksum and is_file:
        sys.stderr.write("Error: A checksum manifest cannot be added to an existing bag archive. "
                         "The bag must be extracted, updated, and re-archived.\n\n")
        sys.exit(2)

    if args.update and is_file:
        sys.stderr.write("Error: An existing bag archive cannot be updated in-place. "
                         "The bag must first be extracted and then updated.\n\n")
        sys.exit(2)

    if args.update and args.resolve_fetch:
        sys.stderr.write("Error: The %s argument is not compatible with the %s argument.\n\n" %
                         (update_arg.option_strings, fetch_arg.option_strings))
        sys.exit(2)

    if args.remote_file_manifest and args.resolve_fetch:
        sys.stderr.write("Error: The %s argument is not compatible with the %s argument.\n\n" %
                         (remote_file_manifest_arg.option_strings, fetch_arg.option_strings))
        sys.exit(2)

    is_bag = bdb.is_bag(path)
    if args.checksum and not args.update and is_bag:
        sys.stderr.write("Error: Specifying %s for an existing bag requires the %s argument in order "
                         "to apply any changes.\n\n" % (checksum_arg.option_strings, update_arg.option_strings))
        sys.exit(2)

    if args.remote_file_manifest and not args.update and is_bag:
        sys.stderr.write("Error: Specifying %s for an existing bag requires the %s argument in order "
                         "to apply any changes.\n\n" % (remote_file_manifest_arg.option_strings, update_arg.option_strings))
        sys.exit(2)

    if args.metadata_file and not args.update and is_bag:
        sys.stderr.write("Error: Specifying %s for an existing bag requires the %s argument in order "
                         "to apply any changes.\n\n" % (metadata_file_arg.option_strings, update_arg.option_strings))
        sys.exit(2)

    if args.prune_manifests and not args.update and is_bag:
        sys.stderr.write("Error: Specifying %s for an existing bag requires the %s argument in order "
                         "to apply any changes.\n\n" % (prune_manifests_arg.option_strings, update_arg.option_strings))
        sys.exit(2)

    if args.skip_manifests and not args.update and is_bag:
        sys.stderr.write("Error: Specifying %s requires the %s argument.\n\n" %
                         (skip_manifests_arg.option_strings, update_arg.option_strings))
        sys.exit(2)

    if BAG_METADATA and not args.update and is_bag:
        sys.stderr.write("Error: Adding or modifying metadata %s for an existing bag requires the %s argument "
                         "in order to apply any changes.\n\n" % (BAG_METADATA, update_arg.option_strings))
        sys.exit(2)

    return args, is_bag, is_file