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#! /usr/bin/env python
# Software License Agreement (BSD License)
#
# Copyright (c) 2008, Willow Garage, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
#  * Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#  * Redistributions in binary form must reproduce the above
#    copyright notice, this list of conditions and the following
#    disclaimer in the documentation and/or other materials provided
#    with the distribution.
#  * Neither the name of Willow Garage, Inc. nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Revision $Id: gendeps 3009 2008-12-05 00:47:44Z sfkwc $
# $Author: sfkwc $

## Script for determining the ROS messages a particular message
## depends on.  This is important for determining messages file that
## need to be rebuilt.

from __future__ import print_function

import sys

import roslib.msgs
import roslib.srvs
import roslib.gentools

import rospkg

NAME='gendeps'

def usage(progname, stdout=sys.stdout):
    print("%(progname)s msg-or-srv-file" % vars(), file=stdout)

## main method for gendeps command
## @param argv [str]: sys args
## @param stdout pipe: stdout pipe
## @param stderr pipe: stderr pipe
def gendeps_main(argv, stdout, stderr):
    from optparse import OptionParser
    parser = OptionParser(usage="usage: %prog [options] [files...]", prog=NAME)
    parser.add_option("-m", "--md5",
                      dest="md5", default=False,
                      action="store_true",
                      help="Generate md5 hash of files")
    parser.add_option("-s", "--sha1",
                      dest="sha1", default=False,
                      action="store_true",
                      help="Generate SHA1 hash of files")
    parser.add_option("-c", "--cat",
                      dest="cat_files", default=False,
                      action="store_true",
                      help="Generate concatenated list of files")
    (options, args) = parser.parse_args(argv)

    # get the file name
    if len(args) != 2:
        parser.error("you must specify one input file")
    f = args[1]

    # validate that options are compatible
    if options.md5 and (options.sha1 or options.cat_files):
        parser.error("md5 option is not compatible with other options")
    if options.sha1 and (options.md5 or options.cat_files):
        parser.error("sha1 option is not compatible with other options")
    if options.cat_files and (options.md5 or options.sha1):
        parser.error("cat option is not compatible with other options")

    # rospack instance for caching of deps
    rospack = rospkg.RosPack()
    retval = roslib.gentools.get_file_dependencies(f, stdout=stdout, stderr=stderr, rospack=rospack)

    if options.md5:
        print(roslib.gentools.compute_md5(retval, rospack=rospack), file=stdout)
    elif options.sha1:
        print(roslib.gentools.compute_sha1(retval, rospack=rospack), file=stdout)
    elif options.cat_files:
        # this option is used for the message definition that is
        # stored in exchanged in ROS handshakes and then stored in bag
        # files
        print(roslib.gentools.compute_full_text(retval), file=stdout)
    else:
        print(' '.join(retval['files'].values()), file=stdout)

if __name__ == "__main__":
    try:
        gendeps_main(sys.argv, sys.stdout, sys.stderr)
    except Exception as e:
        print(e, file=sys.stderr)
        sys.exit(1)