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git/perl/Git/I18N.pm
Jeff King 5338ed2b26 perl: check for perl warnings while running tests
We set "use warnings" in most of our perl code to catch problems. But as
the name implies, warnings just emit a message to stderr and don't
otherwise affect the program. So our tests are quite likely to miss that
warnings are being spewed, as most of them do not look at stderr.

We could ask perl to make all warnings fatal, but this is likely
annoying for non-developers, who would rather have a running program
with a warning than something that refuses to work at all.

So instead, let's teach the perl code to respect an environment variable
(GIT_PERL_FATAL_WARNINGS) to increase the severity of the warnings. This
can be set for day-to-day running if people want to be really pedantic,
but the primary use is to trigger it within the test suite.

We could also trigger that for every test run, but likewise even the
tests failing may be annoying to distro builders, etc (just as -Werror
would be for compiling C code). So we'll tie it to a special test-mode
variable (GIT_TEST_PERL_FATAL_WARNINGS) that can be set in the
environment or as a Makefile knob, and we'll automatically turn the knob
when DEVELOPER=1 is set. That should give developers and CI the more
careful view without disrupting normal users or packagers.

Note that the mapping from the GIT_TEST_* form to the GIT_* form in
test-lib.sh is necessary even if they had the same name: the perl
scripts need it to be normalized to a perl truth value, and we also have
to make sure it's exported (we might have gotten it from the
environment, but we might also have gotten it from GIT-BUILD-OPTIONS
directly).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-21 23:11:48 -07:00

116 lines
2.5 KiB
Perl

package Git::I18N;
use 5.008;
use strict;
use warnings $ENV{GIT_PERL_FATAL_WARNINGS} ? qw(FATAL all) : ();
BEGIN {
require Exporter;
if ($] < 5.008003) {
*import = \&Exporter::import;
} else {
# Exporter 5.57 which supports this invocation was
# released with perl 5.8.3
Exporter->import('import');
}
}
our @EXPORT = qw(__ __n N__);
our @EXPORT_OK = @EXPORT;
sub __bootstrap_locale_messages {
our $TEXTDOMAIN = 'git';
our $TEXTDOMAINDIR ||= $ENV{GIT_TEXTDOMAINDIR} || '@@LOCALEDIR@@';
require POSIX;
POSIX->import(qw(setlocale));
# Non-core prerequisite module
require Locale::Messages;
Locale::Messages->import(qw(:locale_h :libintl_h));
setlocale(LC_MESSAGES(), '');
setlocale(LC_CTYPE(), '');
textdomain($TEXTDOMAIN);
bindtextdomain($TEXTDOMAIN => $TEXTDOMAINDIR);
return;
}
BEGIN
{
# Used by our test script to see if it should test fallbacks or
# not.
our $__HAS_LIBRARY = 1;
local $@;
eval {
__bootstrap_locale_messages();
*__ = \&Locale::Messages::gettext;
*__n = \&Locale::Messages::ngettext;
1;
} or do {
# Tell test.pl that we couldn't load the gettext library.
$Git::I18N::__HAS_LIBRARY = 0;
# Just a fall-through no-op
*__ = sub ($) { $_[0] };
*__n = sub ($$$) { $_[2] == 1 ? $_[0] : $_[1] };
};
sub N__($) { return shift; }
}
1;
__END__
=head1 NAME
Git::I18N - Perl interface to Git's Gettext localizations
=head1 SYNOPSIS
use Git::I18N;
print __("Welcome to Git!\n");
printf __("The following error occurred: %s\n"), $error;
printf __n("committed %d file\n", "committed %d files\n", $files), $files;
=head1 DESCRIPTION
Git's internal Perl interface to gettext via L<Locale::Messages>. If
L<Locale::Messages> can't be loaded (it's not a core module) we
provide stub passthrough fallbacks.
This is a distilled interface to gettext, see C<info '(gettext)Perl'>
for the full interface. This module implements only a small part of
it.
=head1 FUNCTIONS
=head2 __($)
L<Locale::Messages>'s gettext function if all goes well, otherwise our
passthrough fallback function.
=head2 __n($$$)
L<Locale::Messages>'s ngettext function or passthrough fallback function.
=head2 N__($)
No-operation that only returns its argument. Use this if you want xgettext to
extract the text to the pot template but do not want to trigger retrival of the
translation at run time.
=head1 AUTHOR
E<AElig>var ArnfjE<ouml>rE<eth> Bjarmason <avarab@gmail.com>
=head1 COPYRIGHT
Copyright 2010 E<AElig>var ArnfjE<ouml>rE<eth> Bjarmason <avarab@gmail.com>
=cut