author | Augie Fackler <augie@google.com> |
Wed, 14 Nov 2018 10:11:37 -0500 | |
branch | stable |
changeset 40726 | 6c01fad8de32 |
parent 38815 | 617ae7e33a65 |
child 43691 | 47ef023d0165 |
permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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# |
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# hggettext - carefully extract docstrings for Mercurial |
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# |
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# Copyright 2009 Matt Mackall <mpm@selenic.com> and others |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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# The normalize function is taken from pygettext which is distributed |
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# with Python under the Python License, which is GPL compatible. |
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|
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"""Extract docstrings from Mercurial commands. |
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Compared to pygettext, this script knows about the cmdtable and table |
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dictionaries used by Mercurial, and will only extract docstrings from |
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functions mentioned therein. |
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Use xgettext like normal to extract strings marked as translatable and |
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join the message cataloges to get the final catalog. |
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""" |
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|
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from __future__ import absolute_import, print_function |
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import inspect |
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import os |
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import re |
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import sys |
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def escape(s): |
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# The order is important, the backslash must be escaped first |
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# since the other replacements introduce new backslashes |
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# themselves. |
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s = s.replace('\\', '\\\\') |
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s = s.replace('\n', '\\n') |
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s = s.replace('\r', '\\r') |
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s = s.replace('\t', '\\t') |
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s = s.replace('"', '\\"') |
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return s |
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def normalize(s): |
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# This converts the various Python string types into a format that |
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# is 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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lines = map(escape, lines) |
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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 poentry(path, lineno, s): |
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return ('#: %s:%d\n' % (path, lineno) + |
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'msgid %s\n' % normalize(s) + |
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'msgstr ""\n') |
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doctestre = re.compile(r'^ +>>> ', re.MULTILINE) |
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|
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def offset(src, doc, name, lineno, default): |
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"""Compute offset or issue a warning on stdout.""" |
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# remove doctest part, in order to avoid backslash mismatching |
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m = doctestre.search(doc) |
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if m: |
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doc = doc[:m.start()] |
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# Backslashes in doc appear doubled in src. |
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end = src.find(doc.replace('\\', '\\\\')) |
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if end == -1: |
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# This can happen if the docstring contains unnecessary escape |
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# sequences such as \" in a triple-quoted string. The problem |
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# is that \" is turned into " and so doc wont appear in src. |
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sys.stderr.write("%s:%d:warning:" |
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" unknown docstr offset, assuming %d lines\n" |
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% (name, lineno, default)) |
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return default |
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else: |
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return src.count('\n', 0, end) |
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|
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def importpath(path): |
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"""Import a path like foo/bar/baz.py and return the baz module.""" |
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if path.endswith('.py'): |
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path = path[:-3] |
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if path.endswith('/__init__'): |
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path = path[:-9] |
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path = path.replace('/', '.') |
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mod = __import__(path) |
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for comp in path.split('.')[1:]: |
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mod = getattr(mod, comp) |
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return mod |
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|
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def docstrings(path): |
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"""Extract docstrings from path. |
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|
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This respects the Mercurial cmdtable/table convention and will |
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only extract docstrings from functions mentioned in these tables. |
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""" |
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mod = importpath(path) |
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if not path.startswith('mercurial/') and mod.__doc__: |
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with open(path) as fobj: |
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src = fobj.read() |
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lineno = 1 + offset(src, mod.__doc__, path, 1, 7) |
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print(poentry(path, lineno, mod.__doc__)) |
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functions = list(getattr(mod, 'i18nfunctions', [])) |
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functions = [(f, True) for f in functions] |
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cmdtable = getattr(mod, 'cmdtable', {}) |
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if not cmdtable: |
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# Maybe we are processing mercurial.commands? |
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cmdtable = getattr(mod, 'table', {}) |
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functions.extend((c[0], False) for c in cmdtable.itervalues()) |
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121 |
|
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for func, rstrip in functions: |
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if func.__doc__: |
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docobj = func # this might be a proxy to provide formatted doc |
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func = getattr(func, '_origfunc', func) |
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126 |
funcmod = inspect.getmodule(func) |
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127 |
extra = '' |
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128 |
if funcmod.__package__ == funcmod.__name__: |
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extra = '/__init__' |
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actualpath = '%s%s.py' % (funcmod.__name__.replace('.', '/'), extra) |
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131 |
|
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132 |
src = inspect.getsource(func) |
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lineno = inspect.getsourcelines(func)[1] |
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doc = docobj.__doc__ |
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135 |
origdoc = getattr(docobj, '_origdoc', '') |
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if rstrip: |
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doc = doc.rstrip() |
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origdoc = origdoc.rstrip() |
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139 |
if origdoc: |
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lineno += offset(src, origdoc, actualpath, lineno, 1) |
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141 |
else: |
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lineno += offset(src, doc, actualpath, lineno, 1) |
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print(poentry(actualpath, lineno, doc)) |
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144 |
|
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145 |
|
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146 |
def rawtext(path): |
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with open(path) as f: |
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148 |
src = f.read() |
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print(poentry(path, 1, src)) |
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150 |
|
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151 |
|
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152 |
if __name__ == "__main__": |
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153 |
# It is very important that we import the Mercurial modules from |
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154 |
# the source tree where hggettext is executed. Otherwise we might |
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155 |
# accidentally import and extract strings from a Mercurial |
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156 |
# installation mentioned in PYTHONPATH. |
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157 |
sys.path.insert(0, os.getcwd()) |
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158 |
from mercurial import demandimport; demandimport.enable() |
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159 |
for path in sys.argv[1:]: |
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if path.endswith('.txt'): |
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161 |
rawtext(path) |
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162 |
else: |
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163 |
docstrings(path) |