670 lines
22 KiB
Python
670 lines
22 KiB
Python
#! /usr/bin/env python
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# -*- coding: iso-8859-1 -*-
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# Originally written by Barry Warsaw <barry@zope.com>
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#
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# Minimally patched to make it even more xgettext compatible
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# by Peter Funk <pf@artcom-gmbh.de>
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#
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# 2002-11-22 Jürgen Hermann <jh@web.de>
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# Added checks that _() only contains string literals, and
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# command line args are resolved to module lists, i.e. you
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# can now pass a filename, a module or package name, or a
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# directory (including globbing chars, important for Win32).
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# Made docstring fit in 80 chars wide displays using pydoc.
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#
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# for selftesting
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try:
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import fintl
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_ = fintl.gettext
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except ImportError:
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_ = lambda s: s
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__doc__ = _("""pygettext -- Python equivalent of xgettext(1)
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Many systems (Solaris, Linux, Gnu) provide extensive tools that ease the
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internationalization of C programs. Most of these tools are independent of
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the programming language and can be used from within Python programs.
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Martin von Loewis' work[1] helps considerably in this regard.
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There's one problem though; xgettext is the program that scans source code
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looking for message strings, but it groks only C (or C++). Python
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introduces a few wrinkles, such as dual quoting characters, triple quoted
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strings, and raw strings. xgettext understands none of this.
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Enter pygettext, which uses Python's standard tokenize module to scan
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Python source code, generating .pot files identical to what GNU xgettext[2]
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generates for C and C++ code. From there, the standard GNU tools can be
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used.
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A word about marking Python strings as candidates for translation. GNU
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xgettext recognizes the following keywords: gettext, dgettext, dcgettext,
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and gettext_noop. But those can be a lot of text to include all over your
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code. C and C++ have a trick: they use the C preprocessor. Most
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internationalized C source includes a #define for gettext() to _() so that
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what has to be written in the source is much less. Thus these are both
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translatable strings:
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gettext("Translatable String")
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_("Translatable String")
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Python of course has no preprocessor so this doesn't work so well. Thus,
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pygettext searches only for _() by default, but see the -k/--keyword flag
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below for how to augment this.
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[1] http://www.python.org/workshops/1997-10/proceedings/loewis.html
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[2] http://www.gnu.org/software/gettext/gettext.html
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NOTE: pygettext attempts to be option and feature compatible with GNU
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xgettext where ever possible. However some options are still missing or are
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not fully implemented. Also, xgettext's use of command line switches with
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option arguments is broken, and in these cases, pygettext just defines
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additional switches.
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Usage: pygettext [options] inputfile ...
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Options:
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-a
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--extract-all
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Extract all strings.
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-d name
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--default-domain=name
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Rename the default output file from messages.pot to name.pot.
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-E
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--escape
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Replace non-ASCII characters with octal escape sequences.
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-D
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--docstrings
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Extract module, class, method, and function docstrings. These do
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not need to be wrapped in _() markers, and in fact cannot be for
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Python to consider them docstrings. (See also the -X option).
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-h
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--help
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Print this help message and exit.
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-k word
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--keyword=word
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Keywords to look for in addition to the default set, which are:
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%(DEFAULTKEYWORDS)s
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You can have multiple -k flags on the command line.
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-K
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--no-default-keywords
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Disable the default set of keywords (see above). Any keywords
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explicitly added with the -k/--keyword option are still recognized.
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--no-location
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Do not write filename/lineno location comments.
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-n
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--add-location
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Write filename/lineno location comments indicating where each
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extracted string is found in the source. These lines appear before
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each msgid. The style of comments is controlled by the -S/--style
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option. This is the default.
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-o filename
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--output=filename
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Rename the default output file from messages.pot to filename. If
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filename is `-' then the output is sent to standard out.
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-p dir
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--output-dir=dir
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Output files will be placed in directory dir.
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-S stylename
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--style stylename
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Specify which style to use for location comments. Two styles are
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supported:
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Solaris # File: filename, line: line-number
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GNU #: filename:line
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The style name is case insensitive. GNU style is the default.
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-v
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--verbose
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Print the names of the files being processed.
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-V
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--version
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Print the version of pygettext and exit.
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-w columns
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--width=columns
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Set width of output to columns.
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-x filename
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--exclude-file=filename
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Specify a file that contains a list of strings that are not be
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extracted from the input files. Each string to be excluded must
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appear on a line by itself in the file.
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-X filename
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--no-docstrings=filename
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Specify a file that contains a list of files (one per line) that
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should not have their docstrings extracted. This is only useful in
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conjunction with the -D option above.
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If `inputfile' is -, standard input is read.
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""")
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import os
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import imp
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import sys
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import glob
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import time
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import getopt
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import token
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import tokenize
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import operator
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__version__ = '1.5'
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default_keywords = ['_']
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DEFAULTKEYWORDS = ', '.join(default_keywords)
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EMPTYSTRING = ''
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# The normal pot-file header. msgmerge and Emacs's po-mode work better if it's
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# there.
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pot_header = _('''\
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# SOME DESCRIPTIVE TITLE.
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# Copyright (C) YEAR ORGANIZATION
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# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
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#
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msgid ""
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msgstr ""
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"Project-Id-Version: PACKAGE VERSION\\n"
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"POT-Creation-Date: %(time)s\\n"
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"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\\n"
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"Last-Translator: FULL NAME <EMAIL@ADDRESS>\\n"
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"Language-Team: LANGUAGE <LL@li.org>\\n"
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"MIME-Version: 1.0\\n"
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"Content-Type: text/plain; charset=CHARSET\\n"
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"Content-Transfer-Encoding: ENCODING\\n"
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"Generated-By: pygettext.py %(version)s\\n"
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''')
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def usage(code, msg=''):
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print >> sys.stderr, __doc__ % globals()
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if msg:
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print >> sys.stderr, msg
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sys.exit(code)
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escapes = []
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def make_escapes(pass_iso8859):
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global escapes
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if pass_iso8859:
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# Allow iso-8859 characters to pass through so that e.g. 'msgid
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# "Höhe"' would result not result in 'msgid "H\366he"'. Otherwise we
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# escape any character outside the 32..126 range.
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mod = 128
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else:
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mod = 256
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for i in range(256):
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if 32 <= (i % mod) <= 126:
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escapes.append(chr(i))
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else:
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escapes.append("\\%03o" % i)
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escapes[ord('\\')] = '\\\\'
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escapes[ord('\t')] = '\\t'
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escapes[ord('\r')] = '\\r'
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escapes[ord('\n')] = '\\n'
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escapes[ord('\"')] = '\\"'
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def escape(s):
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global escapes
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s = list(s)
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for i in range(len(s)):
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s[i] = escapes[ord(s[i])]
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return EMPTYSTRING.join(s)
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def safe_eval(s):
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# unwrap quotes, safely
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return eval(s, {'__builtins__':{}}, {})
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def normalize(s):
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# This converts the various Python string types into a format that is
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# appropriate for .po files, namely much closer to C style.
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lines = s.split('\n')
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if len(lines) == 1:
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s = '"' + escape(s) + '"'
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else:
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if not lines[-1]:
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del lines[-1]
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lines[-1] = lines[-1] + '\n'
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for i in range(len(lines)):
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lines[i] = escape(lines[i])
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lineterm = '\\n"\n"'
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s = '""\n"' + lineterm.join(lines) + '"'
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return s
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def containsAny(str, set):
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"""Check whether 'str' contains ANY of the chars in 'set'"""
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return 1 in [c in str for c in set]
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def _visit_pyfiles(list, dirname, names):
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"""Helper for getFilesForName()."""
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# get extension for python source files
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if not globals().has_key('_py_ext'):
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global _py_ext
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_py_ext = [triple[0] for triple in imp.get_suffixes()
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if triple[2] == imp.PY_SOURCE][0]
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# don't recurse into CVS directories
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if 'CVS' in names:
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names.remove('CVS')
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# add all *.py files to list
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list.extend(
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[os.path.join(dirname, file) for file in names
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if os.path.splitext(file)[1] == _py_ext]
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)
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def _get_modpkg_path(dotted_name, pathlist=None):
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"""Get the filesystem path for a module or a package.
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Return the file system path to a file for a module, and to a directory for
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a package. Return None if the name is not found, or is a builtin or
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extension module.
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"""
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# split off top-most name
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parts = dotted_name.split('.', 1)
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if len(parts) > 1:
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# we have a dotted path, import top-level package
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try:
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file, pathname, description = imp.find_module(parts[0], pathlist)
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if file: file.close()
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except ImportError:
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return None
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# check if it's indeed a package
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if description[2] == imp.PKG_DIRECTORY:
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# recursively handle the remaining name parts
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pathname = _get_modpkg_path(parts[1], [pathname])
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else:
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pathname = None
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else:
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# plain name
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try:
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file, pathname, description = imp.find_module(
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dotted_name, pathlist)
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if file:
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file.close()
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if description[2] not in [imp.PY_SOURCE, imp.PKG_DIRECTORY]:
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pathname = None
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except ImportError:
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pathname = None
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return pathname
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def getFilesForName(name):
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"""Get a list of module files for a filename, a module or package name,
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or a directory.
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"""
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if not os.path.exists(name):
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# check for glob chars
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if containsAny(name, "*?[]"):
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files = glob.glob(name)
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list = []
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for file in files:
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list.extend(getFilesForName(file))
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return list
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# try to find module or package
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name = _get_modpkg_path(name)
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if not name:
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return []
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if os.path.isdir(name):
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# find all python files in directory
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list = []
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os.path.walk(name, _visit_pyfiles, list)
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return list
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elif os.path.exists(name):
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# a single file
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return [name]
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return []
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class TokenEater:
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def __init__(self, options):
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self.__options = options
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self.__messages = {}
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self.__state = self.__waiting
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self.__data = []
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self.__lineno = -1
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self.__freshmodule = 1
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self.__curfile = None
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def __call__(self, ttype, tstring, stup, etup, line):
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# dispatch
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## import token
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## print >> sys.stderr, 'ttype:', token.tok_name[ttype], \
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## 'tstring:', tstring
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self.__state(ttype, tstring, stup[0])
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def __waiting(self, ttype, tstring, lineno):
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opts = self.__options
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# Do docstring extractions, if enabled
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if opts.docstrings and not opts.nodocstrings.get(self.__curfile):
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# module docstring?
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if self.__freshmodule:
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if ttype == tokenize.STRING:
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self.__addentry(safe_eval(tstring), lineno, isdocstring=1)
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self.__freshmodule = 0
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elif ttype not in (tokenize.COMMENT, tokenize.NL):
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self.__freshmodule = 0
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return
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# class docstring?
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if ttype == tokenize.NAME and tstring in ('class', 'def'):
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self.__state = self.__suiteseen
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return
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if ttype == tokenize.NAME and tstring in opts.keywords:
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self.__state = self.__keywordseen
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def __suiteseen(self, ttype, tstring, lineno):
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# ignore anything until we see the colon
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if ttype == tokenize.OP and tstring == ':':
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self.__state = self.__suitedocstring
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def __suitedocstring(self, ttype, tstring, lineno):
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# ignore any intervening noise
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if ttype == tokenize.STRING:
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self.__addentry(safe_eval(tstring), lineno, isdocstring=1)
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self.__state = self.__waiting
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elif ttype not in (tokenize.NEWLINE, tokenize.INDENT,
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tokenize.COMMENT):
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# there was no class docstring
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self.__state = self.__waiting
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def __keywordseen(self, ttype, tstring, lineno):
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if ttype == tokenize.OP and tstring == '(':
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self.__data = []
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self.__lineno = lineno
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self.__state = self.__openseen
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else:
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self.__state = self.__waiting
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def __openseen(self, ttype, tstring, lineno):
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if ttype == tokenize.OP and tstring == ')':
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# We've seen the last of the translatable strings. Record the
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# line number of the first line of the strings and update the list
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# of messages seen. Reset state for the next batch. If there
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# were no strings inside _(), then just ignore this entry.
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if self.__data:
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self.__addentry(EMPTYSTRING.join(self.__data))
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self.__state = self.__waiting
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elif ttype == tokenize.STRING:
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self.__data.append(safe_eval(tstring))
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elif ttype not in [tokenize.COMMENT, token.INDENT, token.DEDENT,
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token.NEWLINE, tokenize.NL]:
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# warn if we see anything else than STRING or whitespace
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print >> sys.stderr, _(
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'*** %(file)s:%(lineno)s: Seen unexpected token "%(token)s"'
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) % {
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'token': tstring,
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'file': self.__curfile,
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'lineno': self.__lineno
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}
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self.__state = self.__waiting
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def __addentry(self, msg, lineno=None, isdocstring=0):
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if lineno is None:
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lineno = self.__lineno
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if not msg in self.__options.toexclude:
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entry = (self.__curfile, lineno)
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self.__messages.setdefault(msg, {})[entry] = isdocstring
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def set_filename(self, filename):
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self.__curfile = filename
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self.__freshmodule = 1
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def write(self, fp):
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options = self.__options
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timestamp = time.strftime('%Y-%m-%d %H:%M+%Z')
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# The time stamp in the header doesn't have the same format as that
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# generated by xgettext...
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print >> fp, pot_header % {'time': timestamp, 'version': __version__}
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# Sort the entries. First sort each particular entry's keys, then
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# sort all the entries by their first item.
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reverse = {}
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for k, v in self.__messages.items():
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keys = v.keys()
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keys.sort()
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reverse.setdefault(tuple(keys), []).append((k, v))
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rkeys = reverse.keys()
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rkeys.sort()
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for rkey in rkeys:
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rentries = reverse[rkey]
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rentries.sort()
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for k, v in rentries:
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isdocstring = 0
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# If the entry was gleaned out of a docstring, then add a
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# comment stating so. This is to aid translators who may wish
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# to skip translating some unimportant docstrings.
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if reduce(operator.__add__, v.values()):
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isdocstring = 1
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# k is the message string, v is a dictionary-set of (filename,
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# lineno) tuples. We want to sort the entries in v first by
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# file name and then by line number.
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v = v.keys()
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v.sort()
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if not options.writelocations:
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pass
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# location comments are different b/w Solaris and GNU:
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elif options.locationstyle == options.SOLARIS:
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for filename, lineno in v:
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d = {'filename': filename, 'lineno': lineno}
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print >>fp, _(
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'# File: %(filename)s, line: %(lineno)d') % d
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elif options.locationstyle == options.GNU:
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# fit as many locations on one line, as long as the
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# resulting line length doesn't exceeds 'options.width'
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locline = '#:'
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for filename, lineno in v:
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d = {'filename': filename, 'lineno': lineno}
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s = _(' %(filename)s:%(lineno)d') % d
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if len(locline) + len(s) <= options.width:
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locline = locline + s
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else:
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print >> fp, locline
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locline = "#:" + s
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if len(locline) > 2:
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print >> fp, locline
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if isdocstring:
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print >> fp, '#, docstring'
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print >> fp, 'msgid', normalize(k)
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print >> fp, 'msgstr ""\n'
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def main():
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global default_keywords
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try:
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opts, args = getopt.getopt(
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sys.argv[1:],
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'ad:DEhk:Kno:p:S:Vvw:x:X:',
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['extract-all', 'default-domain=', 'escape', 'help',
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'keyword=', 'no-default-keywords',
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'add-location', 'no-location', 'output=', 'output-dir=',
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'style=', 'verbose', 'version', 'width=', 'exclude-file=',
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'docstrings', 'no-docstrings',
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])
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except getopt.error, msg:
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usage(1, msg)
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# for holding option values
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class Options:
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# constants
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GNU = 1
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SOLARIS = 2
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# defaults
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extractall = 0 # FIXME: currently this option has no effect at all.
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escape = 0
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keywords = []
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outpath = ''
|
||
outfile = 'messages.pot'
|
||
writelocations = 1
|
||
locationstyle = GNU
|
||
verbose = 0
|
||
width = 78
|
||
excludefilename = ''
|
||
docstrings = 0
|
||
nodocstrings = {}
|
||
|
||
options = Options()
|
||
locations = {'gnu' : options.GNU,
|
||
'solaris' : options.SOLARIS,
|
||
}
|
||
|
||
# parse options
|
||
for opt, arg in opts:
|
||
if opt in ('-h', '--help'):
|
||
usage(0)
|
||
elif opt in ('-a', '--extract-all'):
|
||
options.extractall = 1
|
||
elif opt in ('-d', '--default-domain'):
|
||
options.outfile = arg + '.pot'
|
||
elif opt in ('-E', '--escape'):
|
||
options.escape = 1
|
||
elif opt in ('-D', '--docstrings'):
|
||
options.docstrings = 1
|
||
elif opt in ('-k', '--keyword'):
|
||
options.keywords.append(arg)
|
||
elif opt in ('-K', '--no-default-keywords'):
|
||
default_keywords = []
|
||
elif opt in ('-n', '--add-location'):
|
||
options.writelocations = 1
|
||
elif opt in ('--no-location',):
|
||
options.writelocations = 0
|
||
elif opt in ('-S', '--style'):
|
||
options.locationstyle = locations.get(arg.lower())
|
||
if options.locationstyle is None:
|
||
usage(1, _('Invalid value for --style: %s') % arg)
|
||
elif opt in ('-o', '--output'):
|
||
options.outfile = arg
|
||
elif opt in ('-p', '--output-dir'):
|
||
options.outpath = arg
|
||
elif opt in ('-v', '--verbose'):
|
||
options.verbose = 1
|
||
elif opt in ('-V', '--version'):
|
||
print _('pygettext.py (xgettext for Python) %s') % __version__
|
||
sys.exit(0)
|
||
elif opt in ('-w', '--width'):
|
||
try:
|
||
options.width = int(arg)
|
||
except ValueError:
|
||
usage(1, _('--width argument must be an integer: %s') % arg)
|
||
elif opt in ('-x', '--exclude-file'):
|
||
options.excludefilename = arg
|
||
elif opt in ('-X', '--no-docstrings'):
|
||
fp = open(arg)
|
||
try:
|
||
while 1:
|
||
line = fp.readline()
|
||
if not line:
|
||
break
|
||
options.nodocstrings[line[:-1]] = 1
|
||
finally:
|
||
fp.close()
|
||
|
||
# calculate escapes
|
||
make_escapes(options.escape)
|
||
|
||
# calculate all keywords
|
||
options.keywords.extend(default_keywords)
|
||
|
||
# initialize list of strings to exclude
|
||
if options.excludefilename:
|
||
try:
|
||
fp = open(options.excludefilename)
|
||
options.toexclude = fp.readlines()
|
||
fp.close()
|
||
except IOError:
|
||
print >> sys.stderr, _(
|
||
"Can't read --exclude-file: %s") % options.excludefilename
|
||
sys.exit(1)
|
||
else:
|
||
options.toexclude = []
|
||
|
||
# resolve args to module lists
|
||
expanded = []
|
||
for arg in args:
|
||
if arg == '-':
|
||
expanded.append(arg)
|
||
else:
|
||
expanded.extend(getFilesForName(arg))
|
||
args = expanded
|
||
|
||
# slurp through all the files
|
||
eater = TokenEater(options)
|
||
for filename in args:
|
||
if filename == '-':
|
||
if options.verbose:
|
||
print _('Reading standard input')
|
||
fp = sys.stdin
|
||
closep = 0
|
||
else:
|
||
if options.verbose:
|
||
print _('Working on %s') % filename
|
||
fp = open(filename)
|
||
closep = 1
|
||
try:
|
||
eater.set_filename(filename)
|
||
try:
|
||
tokenize.tokenize(fp.readline, eater)
|
||
except tokenize.TokenError, e:
|
||
print >> sys.stderr, '%s: %s, line %d, column %d' % (
|
||
e[0], filename, e[1][0], e[1][1])
|
||
finally:
|
||
if closep:
|
||
fp.close()
|
||
|
||
# write the output
|
||
if options.outfile == '-':
|
||
fp = sys.stdout
|
||
closep = 0
|
||
else:
|
||
if options.outpath:
|
||
options.outfile = os.path.join(options.outpath, options.outfile)
|
||
fp = open(options.outfile, 'w')
|
||
closep = 1
|
||
try:
|
||
eater.write(fp)
|
||
finally:
|
||
if closep:
|
||
fp.close()
|
||
|
||
|
||
if __name__ == '__main__':
|
||
main()
|
||
# some more test strings
|
||
_(u'a unicode string')
|
||
# this one creates a warning
|
||
_('*** Seen unexpected token "%(token)s"') % {'token': 'test'}
|
||
_('more' 'than' 'one' 'string')
|