[3260] | 1 | # -*- coding: UTF-8 -*- |
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[695] | 2 | # |
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[3260] | 3 | # PyKota : Print Quotas for CUPS |
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[695] | 4 | # |
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[3275] | 5 | # (c) 2003, 2004, 2005, 2006, 2007, 2008 Jerome Alet <alet@librelogiciel.com> |
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[3260] | 6 | # This program is free software: you can redistribute it and/or modify |
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[873] | 7 | # it under the terms of the GNU General Public License as published by |
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[3260] | 8 | # the Free Software Foundation, either version 3 of the License, or |
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[873] | 9 | # (at your option) any later version. |
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[3260] | 10 | # |
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[873] | 11 | # This program is distributed in the hope that it will be useful, |
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| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | # GNU General Public License for more details. |
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| 15 | # |
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| 16 | # You should have received a copy of the GNU General Public License |
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[3260] | 17 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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[695] | 18 | # |
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| 19 | # $Id$ |
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| 20 | # |
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[3304] | 21 | |
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| 22 | """This modules defines a command line options parser for PyKota's command line tools.""" |
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| 23 | |
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[3312] | 24 | import sys |
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| 25 | import os |
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[3304] | 26 | import optparse |
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| 27 | from gettext import gettext as _ |
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| 28 | |
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| 29 | from pykota import version |
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| 30 | |
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| 31 | class PyKotaOptionParser(optparse.OptionParser) : |
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| 32 | """ |
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| 33 | This class to define additional methods, and different help |
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| 34 | formatting, from the traditional OptionParser. |
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| 35 | """ |
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| 36 | def __init__(self, *args, **kwargs) : |
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| 37 | """ |
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| 38 | Initializes our option parser with additional attributes. |
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| 39 | """ |
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| 40 | self.examples = [] |
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[3316] | 41 | kwargs["version"] = "%s (PyKota) %s" % (os.path.basename(sys.argv[0]), |
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| 42 | version.__version__) |
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[3304] | 43 | optparse.OptionParser.__init__(self, *args, **kwargs) |
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| 44 | self.disable_interspersed_args() |
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[3316] | 45 | self.remove_version_and_help() |
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[3315] | 46 | self.add_generic_options() |
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[3304] | 47 | |
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| 48 | def format_help(self, formatter=None) : |
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| 49 | """ |
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| 50 | Reformats help our way : adding examples and copyright |
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| 51 | message at the end. |
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| 52 | """ |
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| 53 | if formatter is None : |
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| 54 | formatter = self.formatter |
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| 55 | result = [] |
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| 56 | result.append(optparse.OptionParser.format_help(self, formatter) + "\n") |
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[3314] | 57 | result.append(self.format_examples()) |
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| 58 | result.append(self.format_copyright()) |
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[3304] | 59 | return "".join(result) |
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[3314] | 60 | |
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| 61 | # |
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| 62 | # Below are PyKota specific additions |
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| 63 | # |
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[3304] | 64 | def format_examples(self, formatter=None) : |
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| 65 | """Formats examples our way.""" |
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| 66 | if formatter is None : |
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| 67 | formatter = self.formatter |
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| 68 | result = [] |
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| 69 | if self.examples : |
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| 70 | result.append(formatter.format_heading(_("examples"))) |
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| 71 | formatter.indent() |
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| 72 | for (cmd, explanation) in self.examples : |
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| 73 | result.append(formatter.format_description(self.expand_prog_name(cmd))) |
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| 74 | result.append(formatter.format_description(self.expand_prog_name(explanation)) + "\n") |
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| 75 | formatter.dedent() |
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| 76 | return "".join(result) |
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| 77 | |
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| 78 | def format_copyright(self, formatter=None) : |
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| 79 | """Formats copyright message our way.""" |
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| 80 | if formatter is None : |
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| 81 | formatter = self.formatter |
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| 82 | result = [] |
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| 83 | result.append(formatter.format_heading(_("licensing terms"))) |
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| 84 | formatter.indent() |
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| 85 | result.append(formatter.format_description("(c) %s %s\n" \ |
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| 86 | % (version.__years__, \ |
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| 87 | version.__author__))) |
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| 88 | for part in version.__gplblurb__.split("\n\n") : |
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| 89 | result.append(formatter.format_description(part) + "\n") |
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| 90 | formatter.dedent() |
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| 91 | return "".join(result) |
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| 92 | |
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| 93 | def add_example(self, command, doc) : |
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| 94 | """Adds an usage example.""" |
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| 95 | self.examples.append(("%prog " + command, doc)) |
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[3312] | 96 | |
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[3316] | 97 | def remove_version_and_help(self) : |
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| 98 | """Removes the default definitions for options version and help.""" |
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| 99 | for o in ("-h", "-help", "--help", "-v", "-version", "--version") : |
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| 100 | try : |
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| 101 | self.remove_option(o) |
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| 102 | except ValueError : |
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| 103 | pass |
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| 104 | |
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[3315] | 105 | def add_generic_options(self) : |
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| 106 | """Adds options which are common to all PyKota command line tools.""" |
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[3316] | 107 | self.add_option("-h", "--help", |
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| 108 | action="help", |
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| 109 | help=_("show this help message and exit")) |
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[3315] | 110 | self.add_option("-v", "--version", |
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[3316] | 111 | action="version", |
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[3315] | 112 | help=_("show the version number and exit")) |
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