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| | # Copyright (C) 2017 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
package PublicInbox::GitIdx;
use strict;
use warnings;
use base qw(Exporter);
our @EXPORT = qw(git_umask_for with_umask);
use PublicInbox::Git;
use constant {
PERM_UMASK => 0,
OLD_PERM_GROUP => 1,
OLD_PERM_EVERYBODY => 2,
PERM_GROUP => 0660,
PERM_EVERYBODY => 0664,
};
sub _git_config_perm ($) {
my ($git) = @_;
my @cmd = qw(config core.sharedRepository);
$git = PublicInbox::Git->new($git) unless ref $git;
my $perm = $git->qx(@cmd);
chomp $perm if defined $perm;
return PERM_GROUP if (!defined($perm) || $perm eq '');
return PERM_UMASK if ($perm eq 'umask');
return PERM_GROUP if ($perm eq 'group');
if ($perm =~ /\A(?:all|world|everybody)\z/) {
return PERM_EVERYBODY;
}
return PERM_GROUP if ($perm =~ /\A(?:true|yes|on|1)\z/);
return PERM_UMASK if ($perm =~ /\A(?:false|no|off|0)\z/);
my $i = oct($perm);
return PERM_UMASK if ($i == PERM_UMASK);
return PERM_GROUP if ($i == OLD_PERM_GROUP);
return PERM_EVERYBODY if ($i == OLD_PERM_EVERYBODY);
if (($i & 0600) != 0600) {
die "core.sharedRepository mode invalid: ".
sprintf('%.3o', $i) . "\nOwner must have permissions\n";
}
($i & 0666);
}
sub git_umask_for ($) {
my ($git) = @_;
my $perm = _git_config_perm($git);
my $rv = $perm;
return umask if $rv == 0;
# set +x bit if +r or +w were set
$rv |= 0100 if ($rv & 0600);
$rv |= 0010 if ($rv & 0060);
$rv |= 0001 if ($rv & 0006);
(~$rv & 0777);
}
sub with_umask ($$) {
my ($umask, $cb) = @_;
my $old = umask $umask;
my $rv = eval { $cb->() };
my $err = $@;
umask $old;
die $err if $@;
$rv;
}
1;
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