Synnefo » ./kamaki

#!/usr/bin/env python

# Copyright 2012 GRNET S.A. All rights reserved.

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from kamaki.cli.command_tree import CommandTree

from kamaki.cli.argument import IntArgument, ValueArgument

from kamaki.cli.argument import ArgumentParseManager

from kamaki.cli.history import History

from kamaki.cli import command

from kamaki.cli.commands import _command_init, errors

from kamaki.cli import exec_cmd, print_error_message

from kamaki.cli.errors import CLIError, raiseCLIError

from kamaki.cli.utils import split_input

from kamaki.clients import ClientError

history_cmds = CommandTree('history', 'Command history')

_commands = [history_cmds]

def _get_num_list(num_str):

    if num_str.startswith('-'):

        num1, sep, num2 = num_str[1:].partition('-')

        num1 = '-%s' % num1

    else:

        num1, sep, num2 = num_str.partition('-')

    (num1, num2) = (num1.strip(), num2.strip())

    try:

        num1 = (-int(num1[1:])) if num1.startswith('-') else int(num1)

    except ValueError as e:

        raiseCLIError(e, 'Invalid id %s' % num1)

    if sep:

        try:

            num2 = (-int(num2[1:])) if num2.startswith('-') else int(num2)

            num2 += 1 if num2 > 0 else 0

        except ValueError as e:

            raiseCLIError(e, 'Invalid id %s' % num2)

    else:

        num2 = (1 + num1) if num1 else 0

    return [i for i in range(num1, num2)]

class _init_history(_command_init):

    @errors.generic.all

    @errors.history.init

    def _run(self):

        self.history = History(self.config.get('history', 'file'))

    def main(self):

        self._run()

@command(history_cmds)

class history_show(_init_history):

    """Show intersession command history

    ---

    - With no parameters : pick all commands in history records

    - With:

    .   1.  <order-id> : pick the <order-id>th command

    .   2.  <order-id-1>-<order-id-2> : pick all commands ordered in the range

    .       [<order-id-1> - <order-id-2>]

    .   - the above can be mixed and repeated freely, separated by spaces

    .       e.g. pick 2 4-7 -3

    .   - Use negative integers to count from the end of the list, e.g.:

    .       -2 means : the command before the last one

    .       -2-5 means : last 2 commands + the first 5

    .       -5--2 means : the last 5 commands except the last 2

    """

    arguments = dict(

        limit=IntArgument('number of lines to show', '-n', default=0),

        match=ValueArgument('show lines that match given terms', '--match')

    )

    @errors.generic.all

    def _run(self, *cmd_ids):

        ret = self.history.get(match_terms=self['match'], limit=self['limit'])

        if not cmd_ids:

            print(''.join(ret))

            return

        num_list = []

        for num_str in cmd_ids:

            num_list += _get_num_list(num_str)

        for cmd_id in num_list:

            try:

                cur_id = int(cmd_id)

                if cur_id:

                    print(ret[cur_id - (1 if cur_id > 0 else 0)][:-1])

            except IndexError as e2:

                raiseCLIError(e2, 'Command id out of 1-%s range' % len(ret))

    def main(self, *cmd_ids):

        super(self.__class__, self)._run()

        self._run(*cmd_ids)

@command(history_cmds)

class history_clean(_init_history):

    """Clean up history (permanent)"""

    @errors.generic.all

    def _run(self):

        self.history.clean()

    def main(self):

        super(self.__class__, self)._run()

        self._run()

@command(history_cmds)

class history_run(_init_history):

    """Run previously executed command(s)

    Use with:

    .   1.  <order-id> : pick the <order-id>th command

    .   2.  <order-id-1>-<order-id-2> : pick all commands ordered in the range

    .       [<order-id-1> - <order-id-2>]

    .   - Use negative integers to count from the end of the list, e.g.:

    .       -2 means : the command before the last one

    .       -2-5 means : last 2 commands + the first 5

    .       -5--2 mean

    .   - to find order ids for commands try   /history show.

    """

    _cmd_tree = None

    def __init__(self, arguments={}, cmd_tree=None):

        super(self.__class__, self).__init__(arguments)

        self._cmd_tree = cmd_tree

    @errors.generic.all

    def _run_from_line(self, line):

        terms = split_input(line)

        cmd, args = self._cmd_tree.find_best_match(terms)

        if not cmd.is_command:

            return

        try:

            instance = cmd.get_class()(self.arguments)

            instance.config = self.config

            prs = ArgumentParseManager(cmd.path.split(),

                dict(instance.arguments))

            prs.syntax = '%s %s' % (

                cmd.path.replace('_', ' '),

                cmd.get_class().syntax)

            prs.parse(args)

            exec_cmd(instance, prs.unparsed, prs.parser.print_help)

        except (CLIError, ClientError) as err:

            print_error_message(err)

        except Exception as e:

            print('Execution of [ %s ] failed' % line)

            print('\t%s' % e)

    @errors.generic.all

    @errors.history._get_cmd_ids

    def _get_cmd_ids(self, cmd_ids):

        cmd_id_list = []

        for cmd_str in cmd_ids:

            cmd_id_list += _get_num_list(cmd_str)

        return cmd_id_list

    @errors.generic.all

    def _run(self, *command_ids):

        cmd_list = self._get_cmd_ids(command_ids)

        for cmd_id in cmd_list:

            r = self.history.retrieve(cmd_id)

            try:

                print('< %s >' % r[:-1])

            except (TypeError, KeyError):

                continue

            if self._cmd_tree:

                r = r[len('kamaki '):-1] if r.startswith('kamaki ') else r[:-1]

                self._run_from_line(r)

    def main(self, *command_ids):

        super(self.__class__, self)._run()

        self._run(*command_ids)