view i18n/check-translation.py @ 20836:a8b4541bb961

grep: reuse the first "util.binary()" result for efficiency

Before this patch, to check whether the file in the specified revision
is binary or not, "util.binary()" is invoked via internal function
"binary()" of "hg grep" once per a line of "hg grep" output, even
though binary-ness is not changed in the same file.

This patch reuses the first "util.binary()" invocation result by
annotating internal function "binary()" with "@util.cachefunc".

Performance improvement measured by "hgperf grep -r 88d8e568add1 vfs
mercurial/scmutil.py":

  before this patch:
    ! wall 0.024000 comb 0.015600 user 0.015600 sys 0.000000 (best of 118)

  after this patch:
    ! wall 0.023000 comb 0.015600 user 0.015600 sys 0.000000 (best of 123)

Status of recent(88d8e568add1) "mercurial/scmutil.py":

  # of lines:     919 (may affect cost of search)
  # of bytes:   29633 (may affect cost of "util.binary()")
  # of matches:    22 (may affect frequency of "util.binary()")

#!/usr/bin/env python
#
# check-translation.py - check Mercurial specific translation problems

import polib
import re

checkers = []

def checker(level, msgidpat):
    def decorator(func):
        if msgidpat:
            match = re.compile(msgidpat).search
        else:
            match = lambda msgid: True
        checkers.append((func, level))
        func.match = match
        return func
    return decorator

def match(checker, pe):
    """Examine whether POEntry "pe" is target of specified checker or not
    """
    if not checker.match(pe.msgid):
        return
    # examine suppression by translator comment
    nochecker = 'no-%s-check' % checker.__name__
    for tc in pe.tcomment.split():
        if nochecker == tc:
            return
    return True

####################

def fatalchecker(msgidpat=None):
    return checker('fatal', msgidpat)

@fatalchecker(r'\$\$')
def promptchoice(pe):
    """Check translation of the string given to "ui.promptchoice()"

    >>> pe = polib.POEntry(
    ...     msgid ='prompt$$missing &sep$$missing &amp$$followed by &none',
    ...     msgstr='prompt  missing &sep$$missing  amp$$followed by none&')
    >>> match(promptchoice, pe)
    True
    >>> for e in promptchoice(pe): print e
    number of choices differs between msgid and msgstr
    msgstr has invalid choice missing '&'
    msgstr has invalid '&' followed by none
    """
    idchoices = [c.rstrip(' ') for c in pe.msgid.split('$$')[1:]]
    strchoices = [c.rstrip(' ') for c in pe.msgstr.split('$$')[1:]]

    if len(idchoices) != len(strchoices):
        yield "number of choices differs between msgid and msgstr"

    indices = [(c, c.find('&')) for c in strchoices]
    if [c for c, i in indices if i == -1]:
        yield "msgstr has invalid choice missing '&'"
    if [c for c, i in indices if len(c) == i + 1]:
        yield "msgstr has invalid '&' followed by none"

####################

def warningchecker(msgidpat=None):
    return checker('warning', msgidpat)

@warningchecker()
def taildoublecolons(pe):
    """Check equality of tail '::'-ness between msgid and msgstr

    >>> pe = polib.POEntry(
    ...     msgid ='ends with ::',
    ...     msgstr='ends with ::')
    >>> for e in taildoublecolons(pe): print e
    >>> pe = polib.POEntry(
    ...     msgid ='ends with ::',
    ...     msgstr='ends without double-colons')
    >>> for e in taildoublecolons(pe): print e
    tail '::'-ness differs between msgid and msgstr
    >>> pe = polib.POEntry(
    ...     msgid ='ends without double-colons',
    ...     msgstr='ends with ::')
    >>> for e in taildoublecolons(pe): print e
    tail '::'-ness differs between msgid and msgstr
    """
    if pe.msgid.endswith('::') != pe.msgstr.endswith('::'):
        yield "tail '::'-ness differs between msgid and msgstr"

@warningchecker()
def indentation(pe):
    """Check equality of initial indentation between msgid and msgstr

    This may report unexpected warning, because this doesn't aware
    the syntax of rst document and the context of msgstr.

    >>> pe = polib.POEntry(
    ...     msgid ='    indented text',
    ...     msgstr='  narrowed indentation')
    >>> for e in indentation(pe): print e
    initial indentation width differs betweeen msgid and msgstr
    """
    idindent = len(pe.msgid) - len(pe.msgid.lstrip())
    strindent = len(pe.msgstr) - len(pe.msgstr.lstrip())
    if idindent != strindent:
        yield "initial indentation width differs betweeen msgid and msgstr"

####################

def check(pofile, fatal=True, warning=False):
    targetlevel = { 'fatal': fatal, 'warning': warning }
    targetcheckers = [(checker, level)
                      for checker, level in checkers
                      if targetlevel[level]]
    if not targetcheckers:
        return []

    detected = []
    for pe in pofile.translated_entries():
        errors = []
        for checker, level in targetcheckers:
            if match(checker, pe):
                errors.extend((level, checker.__name__, error)
                              for error in checker(pe))
        if errors:
            detected.append((pe, errors))
    return detected

########################################

if __name__ == "__main__":
    import sys
    import optparse

    optparser = optparse.OptionParser("""%prog [options] pofile ...

This checks Mercurial specific translation problems in specified
'*.po' files.

Each detected problems are shown in the format below::

    filename:linenum:type(checker): problem detail .....

"type" is "fatal" or "warning". "checker" is the name of the function
detecting corresponded error.

Checking by checker "foo" on the specific msgstr can be suppressed by
the "translator comment" like below. Multiple "no-xxxx-check" should
be separated by whitespaces::

    # no-foo-check
    msgid = "....."
    msgstr = "....."
""")
    optparser.add_option("", "--warning",
                         help="show also warning level problems",
                         action="store_true")
    optparser.add_option("", "--doctest",
                         help="run doctest of this tool, instead of check",
                         action="store_true")
    (options, args) = optparser.parse_args()

    if options.doctest:
        import os
        if 'TERM' in os.environ:
            del os.environ['TERM']
        import doctest
        failures, tests = doctest.testmod()
        sys.exit(failures and 1 or 0)

    # replace polib._POFileParser to show linenum of problematic msgstr
    class ExtPOFileParser(polib._POFileParser):
        def process(self, symbol, linenum):
            super(ExtPOFileParser, self).process(symbol, linenum)
            if symbol == 'MS': # msgstr
                self.current_entry.linenum = linenum
    polib._POFileParser = ExtPOFileParser

    detected = []
    warning = options.warning
    for f in args:
        detected.extend((f, pe, errors)
                        for pe, errors in check(polib.pofile(f),
                                                warning=warning))
    if detected:
        for f, pe, errors in detected:
            for level, checker, error in errors:
                sys.stderr.write('%s:%d:%s(%s): %s\n'
                                 % (f, pe.linenum, level, checker, error))
        sys.exit(1)