#! /usr/bin/python # -*- coding: iso-8859-1 -*- # Originally written by Barry Warsaw # # Minimally patched to make it even more xgettext compatible # by Peter Funk # # 2002-11-22 Jürgen Hermann # Added checks that _() only contains string literals, and # command line args are resolved to module lists, i.e. you # can now pass a filename, a module or package name, or a # directory (including globbing chars, important for Win32). # Made docstring fit in 80 chars wide displays using pydoc. # # 2010-06-12 Jan-Hendrik Göllner # Made it plural sensitive, added ngettext as default keyword. # Any keyworded function that is being supplied > 2 arguments # is treated like ngettext. # Also added support for constructs like "_('foo' + 10*'bar')" # by evaluating the whole expression. # Code like _(foo(arg1, arg2) + "bar") does not work by design # as that expression must be evaluated at runtime and this script # only extracts static strings known before runtime. # However it is possible to do things like # "ngettext('World', 'Worlds', numWorlds)" # as only the first two arguments are evaluated. # Advanced version number from 1.5 to 1.6 # # for selftesting try: #pylint: disable=F0401 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. -D --docstrings Extract module, class, method, and function docstrings. These do not need to be wrapped in _() markers, and in fact cannot be for Python to consider them docstrings. (See also the -X option). -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. -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. -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. -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. -X filename --no-docstrings=filename Specify a file that contains a list of files (one per line) that should not have their docstrings extracted. This is only useful in conjunction with the -D option above. If `inputfile' is -, standard input is read. """) import os import imp import sys import glob import time import getopt import token import tokenize __version__ = '1.6' default_keywords = ['_', 'ngettext'] DEFAULTKEYWORDS = ', '.join(default_keywords) EMPTYSTRING = '' # The normal pot-file header. msgmerge and Emacs's 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" "POT-Creation-Date: %(time)s\\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\\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" "Plural-Forms: nplurals=INTEGER; plural=EXPRESSION;\\n" "Generated-By: pygettext.py %(version)s\\n" ''') def usage(code, msg=''): print >> sys.stderr, __doc__ % globals() if msg: print >> sys.stderr, 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 def containsAny(str, set): """Check whether 'str' contains ANY of the chars in 'set'""" return 1 in [c in str for c in set] def _visit_pyfiles(list, dirname, names): """Helper for getFilesForName().""" # get extension for python source files if not globals().has_key('_py_ext'): global _py_ext _py_ext = [triple[0] for triple in imp.get_suffixes() if triple[2] == imp.PY_SOURCE][0] # don't recurse into CVS directories if 'CVS' in names: names.remove('CVS') # add all *.py files to list list.extend( [os.path.join(dirname, file) for file in names if os.path.splitext(file)[1] == _py_ext] ) def _get_modpkg_path(dotted_name, pathlist=None): """Get the filesystem path for a module or a package. Return the file system path to a file for a module, and to a directory for a package. Return None if the name is not found, or is a builtin or extension module. """ # split off top-most name parts = dotted_name.split('.', 1) if len(parts) > 1: # we have a dotted path, import top-level package try: file, pathname, description = imp.find_module(parts[0], pathlist) if file: file.close() except ImportError: return None # check if it's indeed a package if description[2] == imp.PKG_DIRECTORY: # recursively handle the remaining name parts pathname = _get_modpkg_path(parts[1], [pathname]) else: pathname = None else: # plain name try: file, pathname, description = imp.find_module( dotted_name, pathlist) if file: file.close() if description[2] not in [imp.PY_SOURCE, imp.PKG_DIRECTORY]: pathname = None except ImportError: pathname = None return pathname def getFilesForName(name): """Get a list of module files for a filename, a module or package name, or a directory. """ if not os.path.exists(name): # check for glob chars if containsAny(name, "*?[]"): files = glob.glob(name) list = [] for file in files: list.extend(getFilesForName(file)) return list # try to find module or package name = _get_modpkg_path(name) if not name: return [] if os.path.isdir(name): # find all python files in directory list = [] os.path.walk(name, _visit_pyfiles, list) return list elif os.path.exists(name): # a single file return [name] return [] class TokenEater: def __init__(self, options): self.__options = options self.__messages = {} self.__state = self.__waiting self.__args = [] self.__lineno = -1 self.__freshmodule = 1 self.__curfile = None def __call__(self, ttype, tstring, stup, etup, line): # dispatch ## import token ## print >> sys.stderr, 'ttype:', token.tok_name[ttype], \ ## 'tstring:', tstring self.__state(ttype, tstring, stup[0]) def __waiting(self, ttype, tstring, lineno): opts = self.__options # Do docstring extractions, if enabled if opts.docstrings and not opts.nodocstrings.get(self.__curfile): # module docstring? if self.__freshmodule: if ttype == tokenize.STRING: try: s = safe_eval(tstring) except Exception as e: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: could not evaluate argument "%(arg)s"' ) % { 'arg': tstring, 'file': self.__curfile, 'lineno': self.__lineno } print >> sys.stderr, str(e) else: self.__addentry([s], lineno, isdocstring=1) self.__freshmodule = 0 elif ttype not in (tokenize.COMMENT, tokenize.NL): self.__freshmodule = 0 return # class docstring? if ttype == tokenize.NAME and tstring in ('class', 'def'): self.__state = self.__suiteseen return if ttype == tokenize.NAME and tstring in opts.keywords: self.__state = self.__keywordseen def __suiteseen(self, ttype, tstring, lineno): # ignore anything until we see the colon if ttype == tokenize.OP and tstring == ':': self.__state = self.__suitedocstring def __suitedocstring(self, ttype, tstring, lineno): # ignore any intervening noise if ttype == tokenize.STRING: try: s = safe_eval(tstring) except Exception as e: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: could not evaluate argument "%(arg)s"' ) % { 'arg': tstring, 'file': self.__curfile, 'lineno': self.__lineno } print >> sys.stderr, str(e) else: self.__addentry([s], lineno, isdocstring=1) self.__state = self.__waiting elif ttype not in (tokenize.NEWLINE, tokenize.INDENT, tokenize.COMMENT): # there was no class docstring self.__state = self.__waiting def __keywordseen(self, ttype, tstring, lineno): if ttype == tokenize.OP and tstring == '(': self.__args = [''] self.__lineno = lineno self.__depth = 0 self.__state = self.__scanstring1 else: self.__state = self.__waiting def __scanstring1(self, ttype, tstring, lineno): # handle first argument, which is supposed to be a string. if ttype == tokenize.OP and tstring == ')': # End of list of arguments for the current function call. # If the argument list is empty (as in keyword()), ignore this call. # otherwise evaluate the fragments we collected as the first # argument and record its line number and update the list of # messages seen. Reset state for the next batch. if self.__args[-1]: try: s = safe_eval(self.__args[-1]) except Exception as e: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: could not evaluate argument "%(arg)s"' ) % { 'arg': self.__args[-1], 'file': self.__curfile, 'lineno': self.__lineno } print >> sys.stderr, str(e) self.__state = self.__waiting return if type(s) == str or type(s) == unicode: self.__args[-1] = s self.__addentry(self.__args) else: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: argument is no str or unicode object "%(arg)s"' ) % { 'arg': s, 'file': self.__curfile, 'lineno': self.__lineno } self.__state = self.__waiting elif ttype == tokenize.OP and tstring == ',': # Start of the next argument. try: s = safe_eval(self.__args[-1]) except Exception as e: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: could not evaluate argument "%(arg)s"' ) % { 'arg': self.__args[-1], 'file': self.__curfile, 'lineno': self.__lineno } print >> sys.stderr, str(e) self.__state = self.__waiting return if type(s) == str or type(s) == unicode: self.__args[-1] = s self.__args.append('') # next argument. self.__state = self.__scanstring2 else: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: argument 1 is no str or unicode object "%(arg)s"' ) % { 'arg': s, 'file': self.__curfile, 'lineno': self.__lineno } self.__state = self.__waiting else: # add string to current argument for later evaluation. # no state change in this case. self.__args[-1] += tstring def __scanstring2(self, ttype, tstring, lineno): # handle second argument, which is supposed to be a string. if ttype == tokenize.OP and tstring == ')': # End of list of arguments for the current function call. # This is an error if we expect either one or three arguments but # never two. print >> sys.stderr, _( '*** %(file)s:%(lineno)s: unexpected number of arguments (2)"' ) % { 'file': self.__curfile, 'lineno': self.__lineno } self.__state = self.__waiting elif ttype == tokenize.OP and tstring == ',': # Start of the next argument. We do not need to parse it, we only # made sure it is there and now we assume this is a plural call. try: s = safe_eval(self.__args[-1]) except Exception as e: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: could not evaluate argument "%(arg)s"' ) % { 'arg': self.__args[-1], 'file': self.__curfile, 'lineno': self.__lineno } print >> sys.stderr, str(e) self.__state = self.__waiting return s = safe_eval(self.__args[-1]) if type(s) == str or type(s) == unicode: self.__args[-1] = s self.__addentry(self.__args) self.__state = self.__waiting else: print >> sys.stderr, _( '*** %(file)s:%(lineno)s: argument 2 is no str or unicode object "%(arg)s"' ) % { 'arg': s, 'file': self.__curfile, 'lineno': self.__lineno } self.__state = self.__waiting else: # add string to current argument for later evaluation. # no state change in this case. self.__args[-1] += tstring def __addentry(self, args, lineno=None, isdocstring=0): isplural = 0 if len(args) > 1: isplural = 1 if lineno is None: lineno = self.__lineno exclude = 0 if args[0] in self.__options.toexclude: exclude = 1 if isplural: if args[1] not in self.__options.toexclude: # in case of plural, both strings must be in the toexclude list # to exclude this entry. exclude = 0 if not exclude: entry = (self.__curfile, lineno) # entries look like this: # {('arg1','arg2') : {(filename,lineno) : }, # ('arg1',) : {(filename,lineno) : }} # a key with len > 1 indicates plurals self.__messages.setdefault(tuple(args[0:2]), {})[entry] = isdocstring def set_filename(self, filename): self.__curfile = filename self.__freshmodule = 1 def write(self, fp): options = self.__options timestamp = time.strftime('%Y-%m-%d %H:%M+%Z') # The time stamp in the header doesn't have the same format as that # generated by xgettext... print >> fp, pot_header % {'time': timestamp, 'version': __version__} # Sort the entries. First sort each particular entry's keys, then # sort all the entries by their first item. reverse = {} for k, v in self.__messages.items(): keys = v.keys() keys.sort() reverse.setdefault(tuple(keys), []).append((k, v)) rkeys = reverse.keys() rkeys.sort() for rkey in rkeys: rentries = reverse[rkey] rentries.sort() for k, v in rentries: # If the entry was gleaned out of a docstring, then add a # comment stating so. This is to aid translators who may wish # to skip translating some unimportant docstrings. isdocstring = sum(v.values()) # k is the message string, v is a dictionary-set of (filename, # lineno) tuples. We want to sort the entries in v first by # file name and then by line number. v = v.keys() v.sort() 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 >>fp, _( '# 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 >> fp, locline locline = "#:" + s if len(locline) > 2: print >> fp, locline if isdocstring: print >> fp, '#, docstring' print >> fp, 'msgid', normalize(k[0]) if len(k) > 1: print >> fp, 'msgid_plural', normalize(k[1]) print >> fp, 'msgstr[0] ""' print >> fp, 'msgstr[1] ""\n' else: print >> fp, 'msgstr ""\n' def main(): global default_keywords try: opts, args = getopt.getopt( sys.argv[1:], 'ad:DEhk:Kno:p:S:Vvw:x:X:', ['extract-all', 'default-domain=', 'escape', 'help', 'keyword=', 'no-default-keywords', 'add-location', 'no-location', 'output=', 'output-dir=', 'style=', 'verbose', 'version', 'width=', 'exclude-file=', 'docstrings', 'no-docstrings', ]) 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 = '' 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')