jp (input): input command first draft:
this is an experimental command to use external data as input arguments. A series of data is used (only CSV is implemented so far), and it is used to fill argument of a command according to a sequence. The sequence is given using input arguments, with types corresponding to the data found (short option, long option, stdin). e.g. if a CSV file has row with 3 columns, we can say that column 1 is subject (long option), column 2 is body (stdin), and column 3 is language (short option -l). A filter can be used after each option type, to transform read value. Finally a static part is used to have the main command and non dynamic arguments to use.
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174
frontends/src/jp/cmd_input.py
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174
frontends/src/jp/cmd_input.py
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#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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# jp: a SàT command line tool
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# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import base
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from sat.core.i18n import _
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from sat_frontends.jp.constants import Const as C
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from sat.tools.common.ansi import ANSI as A
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import subprocess
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import argparse
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import os
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import sys
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__commands__ = ["Input"]
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OPT_STDIN = 'stdin'
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OPT_SHORT = 'short'
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OPT_LONG = 'long'
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OPT_POS = 'positional'
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OPT_IGNORE = 'ignore'
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OPT_TYPES = (OPT_STDIN, OPT_SHORT, OPT_LONG, OPT_POS, OPT_IGNORE)
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class InputCommon(base.CommandBase):
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def __init__(self, host, name, help):
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base.CommandBase.__init__(self, host, name, use_verbose=True, use_profile=False, help=help)
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self.idx = 0
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self.reset()
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def reset(self):
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self.args_idx = 0
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self._stdin = []
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self._opts = []
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self._pos = []
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def add_parser_options(self):
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self.parser.add_argument("--encoding", default='utf-8', help=_(u"encoding of the input data"))
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self.parser.add_argument("-i", "--stdin", action='append_const', const=(OPT_STDIN, None), dest='arguments', help=_(u"standard input"))
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self.parser.add_argument("-s", "--short", type=self.opt(OPT_SHORT), action='append', dest='arguments', help=_(u"short option"))
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self.parser.add_argument("-l", "--long", type=self.opt(OPT_LONG), action='append', dest='arguments', help=_(u"long option"))
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self.parser.add_argument("-p", "--positional", type=self.opt(OPT_POS), action='append', dest='arguments', help=_(u"positional argument"))
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self.parser.add_argument("-x", "--ignore", action='append_const', const=(OPT_IGNORE, None), dest='arguments', help=_(u"ignore value"))
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self.parser.add_argument("-D", "--debug", action='store_true', help=_(u"don't actually run commands but echo what would be launched"))
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self.parser.add_argument("command", nargs=argparse.REMAINDER)
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def opt(self, type_):
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return lambda s: (type_, s)
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def addValue(self, value):
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"""add a parsed value according to arguments sequence"""
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arguments = self.args.arguments
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try:
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arg_type, arg_name = arguments[self.args_idx]
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except IndexError:
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self.disp(_(u"arguments in input data and in arguments sequence don't match"), error=True)
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self.host.quit(C.EXIT_DATA_ERROR)
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self.args_idx += 1
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while self.args_idx < len(arguments):
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next_arg = arguments[self.args_idx]
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if next_arg[0] not in OPT_TYPES:
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# we have a filter
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filter_type, filter_arg = arguments[self.args_idx]
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value = self.filter(filter_type, filter_arg, value)
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else:
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break
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self.args_idx += 1
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if not isinstance(value, list):
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value = [value]
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for v in value:
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if arg_type == OPT_STDIN:
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self._stdin.append(v.encode('utf-8'))
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elif arg_type == OPT_SHORT:
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self._opts.append('-{}'.format(arg_name))
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self._opts.append(v.encode('utf-8'))
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elif arg_type == OPT_LONG:
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self._opts.append('--{}'.format(arg_name))
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self._opts.append(v.encode('utf-8'))
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elif arg_type == OPT_POS:
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self._pos.append(v.encode('utf-8'))
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elif arg_type == OPT_IGNORE:
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pass
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else:
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self.parser.error(_(u"Invalid argument, an option type is expected, got {type_}:{name}").format(
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type_=arg_type, name=arg_name))
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def runCommand(self):
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"""run requested command with parsed arguments"""
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if self.args_idx != len(self.args.arguments):
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self.disp(_(u"arguments in input data and in arguments sequence don't match"), error=True)
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self.host.quit(C.EXIT_DATA_ERROR)
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stdin = ''.join(self._stdin)
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if self.args.debug:
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self.disp(_(u'command {idx}').format(idx=self.idx))
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if stdin:
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self.disp(u'--- STDIN ---')
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self.disp(stdin.decode('utf-8'))
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self.disp(u'-------------')
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self.disp(u'{indent}{prog} {static} {options} {positionals}'.format(
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indent = 4*u' ',
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prog=sys.argv[0],
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static = ' '.join(self.args.command).encode('utf-8'),
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options = u' '.join([o.encode('utf-8') for o in self._opts]),
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positionals = u' '.join([p.encode('utf-8') for p in self._pos])
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))
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self.disp(u'')
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else:
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self.disp(_(u'command {idx}').format(idx=self.idx), no_lf=True)
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with open(os.devnull, 'wb') as DEVNULL:
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p = subprocess.Popen([sys.argv[0]] + self.args.command + self._opts + self._pos,
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stdin=subprocess.PIPE, stdout=DEVNULL, stderr=DEVNULL)
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p.communicate(stdin)
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ret = p.wait()
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if ret == 0:
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self.disp(A.color(C.A_SUCCESS, _(u'OK')))
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else:
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self.disp(A.color(C.A_FAILURE, _(u'FAILED')))
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self.reset()
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self.idx += 1
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def filter(self, filter_type, filter_arg, value):
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raise NotImplementedError
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class Csv(InputCommon):
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def __init__(self, host):
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super(Csv, self).__init__(host, 'csv', _(u'comma-separated values'))
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def add_parser_options(self):
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InputCommon.add_parser_options(self)
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self.parser.add_argument("-r", "--row", type=int, default=0, help=_(u"starting row (previous ones will be ignored)"))
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self.parser.add_argument("-S", "--split", action='append_const', const=('split', None), dest='arguments', help=_(u"split value in several options"))
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def filter(self, arg_type, filter_type, filter_arg, value):
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if filter_type == 'split':
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return value.split()
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super(Csv, self).filter(filter_type, filter_arg, value)
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def start(self):
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import csv
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reader = csv.reader(sys.stdin)
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for idx, row in enumerate(reader):
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if idx < self.args.row:
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continue
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for value in row:
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self.addValue(value.decode(self.args.encoding))
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self.runCommand()
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class Input(base.CommandBase):
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subcommands = (Csv,)
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def __init__(self, host):
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super(Input, self).__init__(host, 'input', use_profile=False, help=_(u'launch command with external input'))
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