code-3e31e53a6ff6/tools/pygettext.py0000644000000000000000000003537707401012143015513 0ustar 00000000000000#! /usr/bin/env python # Originally written by Barry Warsaw # # minimally patched to make it even more xgettext compatible # by Peter Funk # for selftesting try: import fintl _ = fintl.gettext except ImportError: _ = lambda s: s __doc__ = _("""pygettext -- Python equivalent of xgettext(1) Many systems (Solaris, Linux, Gnu) provide extensive tools that ease the internationalization of C programs. Most of these tools are independent of the programming language and can be used from within Python programs. Martin von Loewis' work[1] helps considerably in this regard. There's one problem though; xgettext is the program that scans source code looking for message strings, but it groks only C (or C++). Python introduces a few wrinkles, such as dual quoting characters, triple quoted strings, and raw strings. xgettext understands none of this. Enter pygettext, which uses Python's standard tokenize module to scan Python source code, generating .pot files identical to what GNU xgettext[2] generates for C and C++ code. From there, the standard GNU tools can be used. A word about marking Python strings as candidates for translation. GNU xgettext recognizes the following keywords: gettext, dgettext, dcgettext, and gettext_noop. But those can be a lot of text to include all over your code. C and C++ have a trick: they use the C preprocessor. Most internationalized C source includes a #define for gettext() to _() so that what has to be written in the source is much less. Thus these are both translatable strings: gettext("Translatable String") _("Translatable String") Python of course has no preprocessor so this doesn't work so well. Thus, pygettext searches only for _() by default, but see the -k/--keyword flag below for how to augment this. [1] http://www.python.org/workshops/1997-10/proceedings/loewis.html [2] http://www.gnu.org/software/gettext/gettext.html NOTE: pygettext attempts to be option and feature compatible with GNU xgettext where ever possible. However some options are still missing or are not fully implemented. Also, xgettext's use of command line switches with option arguments is broken, and in these cases, pygettext just defines additional switches. Usage: pygettext [options] inputfile ... Options: -a --extract-all Extract all strings -d name --default-domain=name Rename the default output file from messages.pot to name.pot -E --escape replace non-ASCII characters with octal escape sequences. -h --help print this help message and exit -k word --keyword=word Keywords to look for in addition to the default set, which are: %(DEFAULTKEYWORDS)s You can have multiple -k flags on the command line. -K --no-default-keywords Disable the default set of keywords (see above). Any keywords explicitly added with the -k/--keyword option are still recognized. --no-location Do not write filename/lineno location comments. -n --add-location Write filename/lineno location comments indicating where each extracted string is found in the source. These lines appear before each msgid. The style of comments is controlled by the -S/--style option. This is the default. -S stylename --style stylename Specify which style to use for location comments. Two styles are supported: Solaris # File: filename, line: line-number GNU #: filename:line The style name is case insensitive. GNU style is the default. -o filename --output=filename Rename the default output file from messages.pot to filename. If filename is `-' then the output is sent to standard out. -p dir --output-dir=dir Output files will be placed in directory dir. -v --verbose Print the names of the files being processed. -V --version Print the version of pygettext and exit. -w columns --width=columns Set width of output to columns. -x filename --exclude-file=filename Specify a file that contains a list of strings that are not be extracted from the input files. Each string to be excluded must appear on a line by itself in the file. If `inputfile' is -, standard input is read. """) import os import sys import time import getopt import token import tokenize __version__ = '1.1' default_keywords = ['_'] DEFAULTKEYWORDS = ', '.join(default_keywords) EMPTYSTRING = '' # The normal pot-file header. msgmerge and EMACS' po-mode work better if # it's there. pot_header = _('''\ # SOME DESCRIPTIVE TITLE. # Copyright (C) YEAR ORGANIZATION # FIRST AUTHOR , YEAR. # msgid "" msgstr "" "Project-Id-Version: PACKAGE VERSION\\n" "PO-Revision-Date: %(time)s\\n" "Last-Translator: FULL NAME \\n" "Language-Team: LANGUAGE \\n" "MIME-Version: 1.0\\n" "Content-Type: text/plain; charset=CHARSET\\n" "Content-Transfer-Encoding: ENCODING\\n" "Generated-By: pygettext.py %(version)s\\n" ''') def usage(code, msg=''): print __doc__ % globals() if msg: print msg sys.exit(code) escapes = [] def make_escapes(pass_iso8859): global escapes if pass_iso8859: # Allow iso-8859 characters to pass through so that e.g. 'msgid # "Höhe"' would result not result in 'msgid "H\366he"'. Otherwise we # escape any character outside the 32..126 range. mod = 128 else: mod = 256 for i in range(256): if 32 <= (i % mod) <= 126: escapes.append(chr(i)) else: escapes.append("\\%03o" % i) escapes[ord('\\')] = '\\\\' escapes[ord('\t')] = '\\t' escapes[ord('\r')] = '\\r' escapes[ord('\n')] = '\\n' escapes[ord('\"')] = '\\"' def escape(s): global escapes s = list(s) for i in range(len(s)): s[i] = escapes[ord(s[i])] return EMPTYSTRING.join(s) def safe_eval(s): # unwrap quotes, safely return eval(s, {'__builtins__':{}}, {}) def normalize(s): # This converts the various Python string types into a format that is # appropriate for .po files, namely much closer to C style. lines = s.split('\n') if len(lines) == 1: s = '"' + escape(s) + '"' else: if not lines[-1]: del lines[-1] lines[-1] = lines[-1] + '\n' for i in range(len(lines)): lines[i] = escape(lines[i]) lineterm = '\\n"\n"' s = '""\n"' + lineterm.join(lines) + '"' return s class TokenEater: def __init__(self, options): self.__options = options self.__messages = {} self.__state = self.__waiting self.__data = [] self.__lineno = -1 def __call__(self, ttype, tstring, stup, etup, line): # dispatch self.__state(ttype, tstring, stup[0]) def __waiting(self, ttype, tstring, lineno): if ttype == tokenize.NAME and tstring in self.__options.keywords: self.__state = self.__keywordseen def __keywordseen(self, ttype, tstring, lineno): if ttype == tokenize.OP and tstring == '(': self.__data = [] self.__lineno = lineno self.__state = self.__openseen else: self.__state = self.__waiting def __openseen(self, ttype, tstring, lineno): if ttype == tokenize.OP and tstring == ')': # We've seen the last of the translatable strings. Record the # line number of the first line of the strings and update the list # of messages seen. Reset state for the next batch. If there # were no strings inside _(), then just ignore this entry. if self.__data: msg = EMPTYSTRING.join(self.__data) if not msg in self.__options.toexclude: entry = (self.__curfile, self.__lineno) linenos = self.__messages.get(msg) if linenos is None: self.__messages[msg] = [entry] else: linenos.append(entry) self.__state = self.__waiting elif ttype == tokenize.STRING: self.__data.append(safe_eval(tstring)) elif ttype not in [tokenize.COMMENT, token.INDENT, token.DEDENT, token.NEWLINE, tokenize.NL]: # warn if we see anything else than STRING or whitespace print >>sys.stderr, _('*** %(file)s:%(lineno)s: Seen unexpected token "%(token)s"') % { 'token': tstring, 'file': self.__curfile, 'lineno': self.__lineno} self.__state = self.__waiting def set_filename(self, filename): self.__curfile = filename def write(self, fp): options = self.__options timestamp = time.ctime(time.time()) # common header try: sys.stdout = fp # The time stamp in the header doesn't have the same format # as that generated by xgettext... print pot_header % {'time': timestamp, 'version': __version__} for k, v in self.__messages.items(): if not options.writelocations: pass # location comments are different b/w Solaris and GNU: elif options.locationstyle == options.SOLARIS: for filename, lineno in v: d = {'filename': filename, 'lineno': lineno} print _('# File: %(filename)s, line: %(lineno)d') % d elif options.locationstyle == options.GNU: # fit as many locations on one line, as long as the # resulting line length doesn't exceeds 'options.width' locline = '#:' for filename, lineno in v: d = {'filename': filename, 'lineno': lineno} s = _(' %(filename)s:%(lineno)d') % d if len(locline) + len(s) <= options.width: locline = locline + s else: print locline locline = "#:" + s if len(locline) > 2: print locline # TBD: sorting, normalizing print 'msgid', normalize(k) print 'msgstr ""\n' finally: sys.stdout = sys.__stdout__ def main(): global default_keywords try: opts, args = getopt.getopt( sys.argv[1:], 'ad:Ehk:Kno:p:S:Vvw:x:', ['extract-all', 'default-domain', 'escape', 'help', 'keyword=', 'no-default-keywords', 'add-location', 'no-location', 'output=', 'output-dir=', 'style=', 'verbose', 'version', 'width=', 'exclude-file=', ]) except getopt.error, msg: usage(1, msg) # for holding option values class Options: # constants GNU = 1 SOLARIS = 2 # defaults extractall = 0 # FIXME: currently this option has no effect at all. escape = 0 keywords = [] outpath = '' outfile = 'messages.pot' writelocations = 1 locationstyle = GNU verbose = 0 width = 78 excludefilename = '' 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 ('-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 # 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: sys.stderr.write(_("Can't read --exclude-file: %s") % options.excludefilename) sys.exit(1) else: options.toexclude = [] # on win32, do internal globbing if sys.platform == 'win32': import glob expanded = [] for arg in args: expanded.extend(glob.glob(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) tokenize.tokenize(fp.readline, eater) 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') _('*** Seen unexpected token "%(token)s"' % {'token': 'test'}) _('more' 'than' 'one' 'string')