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/usr/bin/atraceroute is in ripe-atlas-tools 2.0.2-1.

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The actual contents of the file can be viewed below.

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#!/usr/bin/python

import os
import re
import sys

from ripe.atlas.tools.commands.base import Command, Factory
from ripe.atlas.tools.commands.measure import Factory as BaseFactory
from ripe.atlas.tools.exceptions import RipeAtlasToolsException


class RipeAtlas(object):

    def __init__(self):
        self.command = None
        self.args = []
        self.kwargs = {}

    def _generate_usage(self):
        usage = "Usage: ripe-atlas <command> [arguments]\n\n"
        usage += "Commands:\n"
        longest_command = 0
        classes = []
        for c in Command.get_available_commands():
            if c == "shibboleet":
                continue
            cmd_class = Command.load_command_class(c)
            classes.append(cmd_class)
            cmd_name = cmd_class.get_name()
            if len(cmd_name) > longest_command:
                longest_command = len(cmd_name)
        for cmd_cls in classes:
            usage += "\t{} {}\n".format(
                cmd_cls.get_name().ljust(longest_command + 1),
                cmd_cls.DESCRIPTION,
            )
        usage += (
            "\nFor help on a particular command, try "
            "ripe-atlas <command> --help"
        )
        return usage

    def _set_base_command(self):
        """
        Sets the base command covering cases where we call it with
        shortcut or asking for help.
        """
        caller = os.path.basename(sys.argv[0])
        shortcut = re.match('^a(ping|traceroute|dig|sslcert|ntp|http)$', caller)

        if shortcut:
            self.command = "measure"
            sys.argv.insert(1, self._translate_shortcut(shortcut.group(1)))
            return

        if len(sys.argv) < 2 or sys.argv[1] in ("-h", "--help"):
            self.command = "help"
            return

        self.command = sys.argv.pop(1)

    @staticmethod
    def _translate_shortcut(shortcut):
        if shortcut == "dig":
            return "dns"
        return shortcut

    def autocomplete(self):
        """
        This function is highly inspired from Django's own autocomplete
        manage.py. For more documentation check
        https://github.com/django/django/blob/1.9.4/django/core/management/__init__.py#L198-L270
        """

        def print_options(options, curr):
            """
            Prints matching with current word available autocomplete options
            in a formatted way to look good on bash.
            """
            sys.stdout.write(' '.join(sorted(filter(lambda x: x.startswith(curr), options))))

        # If we are not autocompleting continue as normal
        if 'RIPE_ATLAS_AUTO_COMPLETE' not in os.environ:
            return

        cwords = os.environ['COMP_WORDS'].split()[1:]
        cword = int(os.environ['COMP_CWORD'])

        try:
            curr = cwords[cword - 1]
        except IndexError:
            curr = ''

        commands = list(Command.get_available_commands())

        # base caller ripe-atlas
        if cword == 1:
            print_options(commands, curr)
        # special measure command
        elif cword == 2 and cwords[0] == "measure":
            print_options(BaseFactory.TYPES.keys(), curr)
        # rest of commands
        elif cwords[0] in commands:
            cmd = self.fetch_command_class(cwords[0], cwords)
            cmd.add_arguments()
            options = [sorted(s_opt.option_strings)[0] for s_opt in cmd.parser._actions if s_opt.option_strings]
            previous_options = [x for x in cwords[1:cword - 1]]
            options = [opt for opt in options if opt not in previous_options]
            print_options(options, curr)

        sys.exit(1)

    def fetch_command_class(self, command, arg_options):
        """Fetches the class responsible for the given command."""

        cmd_cls = Command.load_command_class(command)

        if cmd_cls is None:
            # Module containing the command class wasn't found
            raise RipeAtlasToolsException("No such command")

        #
        # If the imported module contains a `Factory` class, execute that
        # to get the `cmd` we're going to use.  Otherwise, we expect there
        # to be a `Command` class in there.
        #

        if issubclass(cmd_cls, Factory):
            cmd = cmd_cls(arg_options).create()
        else:
            cmd = cmd_cls(*self.args, **self.kwargs)

        return cmd

    def main(self):

        self._set_base_command()

        self.autocomplete()

        if self.command == "help":
            raise RipeAtlasToolsException(self._generate_usage())

        cmd = self.fetch_command_class(self.command, sys.argv)
        cmd.init_args()
        cmd.run()


if __name__ == '__main__':
    try:
        sys.exit(RipeAtlas().main())
    except RipeAtlasToolsException as e:
        e.write()
        raise SystemExit()