516 lines
16 KiB
Python
Executable File
516 lines
16 KiB
Python
Executable File
#! /usr/bin/env python
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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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# Completely butchered to add glade support for the GRAMPS
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# project by Don Allingham (dallingham@users.sourceforge.net)
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#
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"""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. Martin
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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 introduces
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a few wrinkles, such as dual quoting characters, triple quoted strings, and
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raw strings. xgettext understands none of this.
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Enter pygettext, which uses Python's standard tokenize module to scan Python
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source code, generating .pot files identical to what GNU xgettext[2] generates
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for C and C++ code. From there, the standard GNU tools can be 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, and
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gettext_noop. But those can be a lot of text to include all over your code.
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C and C++ have a trick: they use the C preprocessor. Most internationalized C
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source includes a #define for gettext() to _() so that what has to be written
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in the source is much less. Thus these are both 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 xgettext
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where ever possible. However some options are still missing or are not fully
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implemented. Also, xgettext's use of command line switches with option
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arguments is broken, and in these cases, pygettext just defines additional
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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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-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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-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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-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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If `inputfile' is -, standard input is read.
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"""
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import os
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import sys
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import time
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import getopt
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import tokenize
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import operator
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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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def _(s): return s
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__version__ = '1.4'
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default_keywords = ['_']
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EMPTYSTRING = ''
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import sys
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import string
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import xmllib
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class TranslatableStringParser(xmllib.XMLParser):
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def __init__(self,msgs):
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xmllib.XMLParser.__init__(self)
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self.filename = None
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self.strings = msgs
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self.data = ""
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def add_string(self, string):
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if string == "":
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return
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entry = (self.filename, self.lineno)
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if self.strings.has_key(string):
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self.strings[string][entry] = 0
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else:
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self.strings[string] = {entry: 0}
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def read_file(self, filename):
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self.reset()
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self.filename = filename
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fp = open(filename, "r")
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data = fp.read(8192)
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while data:
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self.feed(data)
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data = fp.read(8192)
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fp.close()
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def syntax_error(self, message):
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sys.stderr.write("%s:%d: %s\n" % (self.filename, self.lineno,
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message))
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sys.exit(1)
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def unknown_starttag(self, tag, attrs):
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self.data = ""
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def handle_data(self, data):
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self.data = self.data + data
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def translate_this_string(self):
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self.add_string(self.data)
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# this list should include all tags for which translation should occur
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end_label = translate_this_string
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end_title = translate_this_string
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end_text = translate_this_string
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end_format = translate_this_string
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end_copyright = translate_this_string
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end_comments = translate_this_string
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end_preview_text = translate_this_string
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end_tooltip = translate_this_string
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def end_items(self):
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for item in string.split(self.data, '\n'):
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self.add_string(item)
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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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# GRAMPS
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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=iso-8859-1\\n"
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"Content-Transfer-Encoding: 8bit\\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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sys.stderr.write(_(__doc__) % globals())
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if msg:
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sys.stderr.write(msg)
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sys.stderr.write('\n')
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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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# "H<>he"' 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 string.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 = string.split(s,'\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"' + string.join(lines,lineterm) + '"'
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return s
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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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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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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(string.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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# TBD: should we warn if we seen anything else?
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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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if self.__messages.has_key(msg):
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self.__messages[msg][entry] = isdocstring
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else:
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self.__messages[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 get_messages(self):
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return self.__messages
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def write(self, fp):
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options = self.__options
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timestamp = time.ctime(time.time())
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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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fp.write(pot_header % {'time': timestamp, 'version': __version__})
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fp.write('\n')
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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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if reverse.has_key(tuple(keys)):
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reverse[tuple(keys)].append((k,v))
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else:
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reverse[tuple(keys)] = [(k,v)]
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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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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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fp.write(locline + "\n");
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locline = "#:" + s
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if len(locline) > 2:
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fp.write(locline + "\n")
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fp.write('msgid ' + normalize(k) + "\n")
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fp.write('msgstr ""\n' + "\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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'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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# 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 = ''
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outfile = 'messages.pot'
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verbose = 0
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width = 78
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excludefilename = ''
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docstrings = 0
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nodocstrings = {}
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options = Options()
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# parse options
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for opt, arg in opts:
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if opt in ('-h', '--help'):
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usage(0)
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elif opt in ('-a', '--extract-all'):
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options.extractall = 1
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elif opt in ('-d', '--default-domain'):
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options.outfile = arg + '.pot'
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elif opt in ('-E', '--escape'):
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options.escape = 1
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elif opt in ('-k', '--keyword'):
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options.keywords.append(arg)
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elif opt in ('-K', '--no-default-keywords'):
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default_keywords = []
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elif opt in ('-o', '--output'):
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options.outfile = arg
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elif opt in ('-p', '--output-dir'):
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options.outpath = arg
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elif opt in ('-v', '--verbose'):
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options.verbose = 1
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elif opt in ('-V', '--version'):
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print _('pygettext.py (xgettext for Python) %s') % __version__
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sys.exit(0)
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elif opt in ('-w', '--width'):
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try:
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options.width = int(arg)
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except ValueError:
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usage(1, _('--width argument must be an integer: %s') % arg)
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elif opt in ('-x', '--exclude-file'):
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options.excludefilename = arg
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# calculate escapes
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make_escapes(options.escape)
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# calculate all keywords
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options.keywords.extend(default_keywords)
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# initialize list of strings to exclude
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if options.excludefilename:
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try:
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fp = open(options.excludefilename)
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options.toexclude = fp.readlines()
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fp.close()
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except IOError:
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sys.stderr.write(_("Can't read --exclude-file: %s") % options.excludefilename)
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sys.exit(1)
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else:
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options.toexclude = []
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# slurp through all the files
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eater = TokenEater(options)
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p = TranslatableStringParser(eater.get_messages())
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for filename in args:
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if filename[-5:] == 'glade':
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print 'Working on %s' % filename
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p.read_file(filename)
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else:
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print 'Working on %s' % filename
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fp = open(filename)
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closep = 1
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try:
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eater.set_filename(filename)
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try:
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tokenize.tokenize(fp.readline, eater)
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except tokenize.TokenError, e:
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sys.stderr.write('%s: %s, line %d, column %d' % (e[0], filename, e[1][0], e[1][1]))
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finally:
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if closep:
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fp.close()
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# write the output
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if options.outfile == '-':
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fp = sys.stdout
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closep = 0
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else:
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if options.outpath:
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options.outfile = os.path.join(options.outpath, options.outfile)
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fp = open(options.outfile, 'w')
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closep = 1
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try:
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eater.write(fp)
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finally:
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if closep:
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fp.close()
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if __name__ == '__main__':
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main()
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