view sat_frontends/jp/cmd_input.py @ 2862:b2e898384c25

quick_frontend (app): progress callbacks handling: in addition to listeners, a frontend can now register progression callback and errback which are called when the given progressing action is finished. Those callbacks can be registered using registerProgressCbs or specified in actionManager.
author Goffi <goffi@goffi.org>
date Wed, 20 Mar 2019 09:08:47 +0100
parents 003b8b4b56a7
children ab2696e34d29
line wrap: on
line source

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# jp: a SàT command line tool
# Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import base
from sat.core.i18n import _
from sat.core import exceptions
from sat_frontends.jp.constants import Const as C
from sat.tools.common.ansi import ANSI as A
import subprocess
import argparse
import sys

__commands__ = ["Input"]
OPT_STDIN = "stdin"
OPT_SHORT = "short"
OPT_LONG = "long"
OPT_POS = "positional"
OPT_IGNORE = "ignore"
OPT_TYPES = (OPT_STDIN, OPT_SHORT, OPT_LONG, OPT_POS, OPT_IGNORE)
OPT_EMPTY_SKIP = "skip"
OPT_EMPTY_IGNORE = "ignore"
OPT_EMPTY_CHOICES = (OPT_EMPTY_SKIP, OPT_EMPTY_IGNORE)


class InputCommon(base.CommandBase):
    def __init__(self, host, name, help):
        base.CommandBase.__init__(
            self, host, name, use_verbose=True, use_profile=False, help=help
        )
        self.idx = 0
        self.reset()

    def reset(self):
        self.args_idx = 0
        self._stdin = []
        self._opts = []
        self._pos = []
        self._values_ori = []

    def add_parser_options(self):
        self.parser.add_argument(
            "--encoding", default="utf-8", help=_(u"encoding of the input data")
        )
        self.parser.add_argument(
            "-i",
            "--stdin",
            action="append_const",
            const=(OPT_STDIN, None),
            dest="arguments",
            help=_(u"standard input"),
        )
        self.parser.add_argument(
            "-s",
            "--short",
            type=self.opt(OPT_SHORT),
            action="append",
            dest="arguments",
            help=_(u"short option"),
        )
        self.parser.add_argument(
            "-l",
            "--long",
            type=self.opt(OPT_LONG),
            action="append",
            dest="arguments",
            help=_(u"long option"),
        )
        self.parser.add_argument(
            "-p",
            "--positional",
            type=self.opt(OPT_POS),
            action="append",
            dest="arguments",
            help=_(u"positional argument"),
        )
        self.parser.add_argument(
            "-x",
            "--ignore",
            action="append_const",
            const=(OPT_IGNORE, None),
            dest="arguments",
            help=_(u"ignore value"),
        )
        self.parser.add_argument(
            "-D",
            "--debug",
            action="store_true",
            help=_(u"don't actually run commands but echo what would be launched"),
        )
        self.parser.add_argument(
            "--log", type=argparse.FileType("wb"), help=_(u"log stdout to FILE")
        )
        self.parser.add_argument(
            "--log-err", type=argparse.FileType("wb"), help=_(u"log stderr to FILE")
        )
        self.parser.add_argument("command", nargs=argparse.REMAINDER)

    def opt(self, type_):
        return lambda s: (type_, s)

    def addValue(self, value):
        """add a parsed value according to arguments sequence"""
        self._values_ori.append(value)
        arguments = self.args.arguments
        try:
            arg_type, arg_name = arguments[self.args_idx]
        except IndexError:
            self.disp(
                _(u"arguments in input data and in arguments sequence don't match"),
                error=True,
            )
            self.host.quit(C.EXIT_DATA_ERROR)
        self.args_idx += 1
        while self.args_idx < len(arguments):
            next_arg = arguments[self.args_idx]
            if next_arg[0] not in OPT_TYPES:
                # value will not be used if False or None, so we skip filter
                if value not in (False, None):
                    # we have a filter
                    filter_type, filter_arg = arguments[self.args_idx]
                    value = self.filter(filter_type, filter_arg, value)
            else:
                break
            self.args_idx += 1

        if value is None:
            # we ignore this argument
            return

        if value is False:
            # we skip the whole row
            if self.args.debug:
                self.disp(
                    A.color(
                        C.A_SUBHEADER,
                        _(u"values: "),
                        A.RESET,
                        u", ".join(self._values_ori),
                    ),
                    2,
                )
                self.disp(A.color(A.BOLD, _(u"**SKIPPING**\n")))
            self.reset()
            self.idx += 1
            raise exceptions.CancelError

        if not isinstance(value, list):
            value = [value]

        for v in value:
            if arg_type == OPT_STDIN:
                self._stdin.append(v.encode("utf-8"))
            elif arg_type == OPT_SHORT:
                self._opts.append("-{}".format(arg_name))
                self._opts.append(v.encode("utf-8"))
            elif arg_type == OPT_LONG:
                self._opts.append("--{}".format(arg_name))
                self._opts.append(v.encode("utf-8"))
            elif arg_type == OPT_POS:
                self._pos.append(v.encode("utf-8"))
            elif arg_type == OPT_IGNORE:
                pass
            else:
                self.parser.error(
                    _(
                        u"Invalid argument, an option type is expected, got {type_}:{name}"
                    ).format(type_=arg_type, name=arg_name)
                )

    def runCommand(self):
        """run requested command with parsed arguments"""
        if self.args_idx != len(self.args.arguments):
            self.disp(
                _(u"arguments in input data and in arguments sequence don't match"),
                error=True,
            )
            self.host.quit(C.EXIT_DATA_ERROR)
        self.disp(
            A.color(C.A_HEADER, _(u"command {idx}").format(idx=self.idx)),
            no_lf=not self.args.debug,
        )
        stdin = "".join(self._stdin)
        if self.args.debug:
            self.disp(
                A.color(
                    C.A_SUBHEADER, _(u"values: "), A.RESET, u", ".join(self._values_ori)
                ),
                2,
            )

            if stdin:
                self.disp(A.color(C.A_SUBHEADER, u"--- STDIN ---"))
                self.disp(stdin.decode("utf-8"))
                self.disp(A.color(C.A_SUBHEADER, u"-------------"))
            self.disp(
                u"{indent}{prog} {static} {options} {positionals}".format(
                    indent=4 * u" ",
                    prog=sys.argv[0],
                    static=" ".join(self.args.command).decode("utf-8"),
                    options=u" ".join([o.decode("utf-8") for o in self._opts]),
                    positionals=u" ".join([p.decode("utf-8") for p in self._pos]),
                )
            )
            self.disp(u"\n")
        else:
            self.disp(u" (" + u", ".join(self._values_ori) + u")", 2, no_lf=True)
            args = [sys.argv[0]] + self.args.command + self._opts + self._pos
            p = subprocess.Popen(
                args,
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE,
            )
            (stdout, stderr) = p.communicate(stdin)
            log = self.args.log
            log_err = self.args.log_err
            log_tpl = "{command}\n{buff}\n\n"
            if log:
                log.write(log_tpl.format(command=" ".join(args), buff=stdout))
            if log_err:
                log_err.write(log_tpl.format(command=" ".join(args), buff=stderr))
            ret = p.wait()
            if ret == 0:
                self.disp(A.color(C.A_SUCCESS, _(u"OK")))
            else:
                self.disp(A.color(C.A_FAILURE, _(u"FAILED")))

        self.reset()
        self.idx += 1

    def filter(self, filter_type, filter_arg, value):
        """change input value

        @param filter_type(unicode): name of the filter
        @param filter_arg(unicode, None): argument of the filter
        @param value(unicode): value to filter
        @return (unicode, False, None): modified value
            False to skip the whole row
            None to ignore this argument (but continue row with other ones)
        """
        raise NotImplementedError


class Csv(InputCommon):
    def __init__(self, host):
        super(Csv, self).__init__(host, "csv", _(u"comma-separated values"))

    def add_parser_options(self):
        InputCommon.add_parser_options(self)
        self.parser.add_argument(
            "-r",
            "--row",
            type=int,
            default=0,
            help=_(u"starting row (previous ones will be ignored)"),
        )
        self.parser.add_argument(
            "-S",
            "--split",
            action="append_const",
            const=("split", None),
            dest="arguments",
            help=_(u"split value in several options"),
        )
        self.parser.add_argument(
            "-E",
            "--empty",
            action="append",
            type=self.opt("empty"),
            dest="arguments",
            help=_(u"action to do on empty value ({choices})").format(
                choices=u", ".join(OPT_EMPTY_CHOICES)
            ),
        )

    def filter(self, filter_type, filter_arg, value):
        if filter_type == "split":
            return value.split()
        elif filter_type == "empty":
            if filter_arg == OPT_EMPTY_IGNORE:
                return value if value else None
            elif filter_arg == OPT_EMPTY_SKIP:
                return value if value else False
            else:
                self.parser.error(
                    _(u"--empty value must be one of {choices}").format(
                        choices=u", ".join(OPT_EMPTY_CHOICES)
                    )
                )

        super(Csv, self).filter(filter_type, filter_arg, value)

    def start(self):
        import csv

        reader = csv.reader(sys.stdin)
        for idx, row in enumerate(reader):
            try:
                if idx < self.args.row:
                    continue
                for value in row:
                    self.addValue(value.decode(self.args.encoding))
                self.runCommand()
            except exceptions.CancelError:
                #  this row has been cancelled, we skip it
                continue


class Input(base.CommandBase):
    subcommands = (Csv,)

    def __init__(self, host):
        super(Input, self).__init__(
            host,
            "input",
            use_profile=False,
            help=_(u"launch command with external input"),
        )