annotate i18n/check-translation.py @ 44202:a7f8160cc4e4

setup: don't skip the search for global hg.exe if there is no local instance

The point of trying not to blindly execute `hg` on Windows is that the local
hg.exe would be given precedence, and if py3 isn't on PATH, it errors out with a
modal dialog.  But that's not a problem if there is no local executable that
could be run.

The problem that I recently ran into was I upgraded the repo format to use zstd.
But doing a `make clean` deletes all of the supporting libraries, causing the
next run to abort with a message about not understanding the
`revlog-compression-zstd` requirement.  By getting rid of the local executable
in the previous commit when cleaning, we avoid leaving a broken executable
around, and avoid the py3 PATH problem too.  There is still a small hole in that
`hg.exe` needs to be deleted before switching between py2/py3/PyOxidizer builds,
because the zstd module won't load.  But that seems like good hygiene anyway.

Differential Revision: https://phab.mercurial-scm.org/D8038

#!/usr/bin/env python
#
# check-translation.py - check Mercurial specific translation problems
from __future__ import absolute_import

import re

import polib

scanners = []
checkers = []


def scanner():
    def decorator(func):
        scanners.append(func)
        return func

    return decorator


def levelchecker(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 levelchecker('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"


deprecatedpe = None


@scanner()
def deprecatedsetup(pofile):
    pes = [p for p in pofile if p.msgid == '(DEPRECATED)' and p.msgstr]
    if len(pes):
        global deprecatedpe
        deprecatedpe = pes[0]


@fatalchecker(r'\(DEPRECATED\)')
def deprecated(pe):
    """Check for DEPRECATED
    >>> ped = polib.POEntry(
    ...     msgid = '(DEPRECATED)',
    ...     msgstr= '(DETACERPED)')
    >>> deprecatedsetup([ped])
    >>> pe = polib.POEntry(
    ...     msgid = 'Something (DEPRECATED)',
    ...     msgstr= 'something (DEPRECATED)')
    >>> match(deprecated, pe)
    True
    >>> for e in deprecated(pe): print(e)
    >>> pe = polib.POEntry(
    ...     msgid = 'Something (DEPRECATED)',
    ...     msgstr= 'something (DETACERPED)')
    >>> match(deprecated, pe)
    True
    >>> for e in deprecated(pe): print(e)
    >>> pe = polib.POEntry(
    ...     msgid = 'Something (DEPRECATED)',
    ...     msgstr= 'something')
    >>> match(deprecated, pe)
    True
    >>> for e in deprecated(pe): print(e)
    msgstr inconsistently translated (DEPRECATED)
    >>> pe = polib.POEntry(
    ...     msgid = 'Something (DEPRECATED, foo bar)',
    ...     msgstr= 'something (DETACERPED, foo bar)')
    >>> match(deprecated, pe)
    """
    if not (
        '(DEPRECATED)' in pe.msgstr
        or (deprecatedpe and deprecatedpe.msgstr in pe.msgstr)
    ):
        yield "msgstr inconsistently translated (DEPRECATED)"


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


def warningchecker(msgidpat=None):
    return levelchecker('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 checker in scanners:
        checker(pofile)
    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)

    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)