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update hook: allow multiple "refs" to be checked

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This commit is contained in:
Sitaram Chamarty 2009-11-16 21:45:55 +05:30
parent e922dfb939
commit 498e62c2f3
1 changed files with 28 additions and 8 deletions
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36
src/hooks/update
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@ -47,9 +47,6 @@ chomp($merge_base = `git merge-base $oldsha $newsha`)
unless $oldsha eq '0' x 40
or $newsha eq '0' x 40;
# some of this is from an example hook in Documentation/howto of git.git, with
# some variations
# what are you trying to do? (is it 'W' or '+'?)
my $perm = 'W';
# rewriting a tag is considered a rewind, in terms of permissions
@ -65,6 +62,25 @@ push @allowed_refs, { "$PERSONAL/$ENV{GL_USER}/" => "RW+" } if $PERSONAL;
push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{$ENV{GL_USER}} || [] };
push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{'@all'} || [] };
# prepare the list of refs to be checked
# previously, we just checked $ref -- the ref being updated, which is passed
# to us by git (see man githooks). Now we also have to treat each PATH being
# updated as a potential "ref" and check that, if PATH-based restrictions have
# been specified
my @refs = ($ref); # the first ref to check is the real one
if (exists $repos{$ENV{GL_REPO}}{PATH_LIMITS}) {
# this is special to git -- the hash of an empty tree
my $empty='4b825dc642cb6eb9a060e54bf8d69288fbee4904';
# well they're not really "trees" but $empty is indeed the empty tree so
# we can just pretend $oldsha/$newsha are also trees, and anyway 'git
# diff' only wants trees
my $oldtree = $oldsha eq '0' x 40 ? $empty : $oldsha;
my $newtree = $newsha eq '0' x 40 ? $empty : $newsha;
push @refs, map { chomp; s/^/PATH\//; $_; } `git diff --name-only $oldtree $newtree`;
}
my $refex = '';
# check one ref
@ -88,21 +104,25 @@ sub check_ref {
die "$perm $ref $ENV{GL_USER} DENIED by $refex\n" if $ar->{$refex} eq '-';
# as far as *this* ref is concerned we're ok
return if ($ar->{$refex} =~ /\Q$perm/);
return $refex if ($ar->{$refex} =~ /\Q$perm/);
}
die "$perm $ref $ENV{GL_REPO} $ENV{GL_USER} DENIED by fallthru\n";
}
# and in this version, we have only one ref to check
check_ref($ref);
# and in this version, we have many "refs" to check. The one we print in the
# log is the *first* one (which is a *real* ref, like refs/heads/master),
# while all the rest (if they exist) are like PATH/something. So we do the
# first one separately to capture it, then run the rest (if any)
my $log_refex = check_ref(shift @refs);
check_ref($_) for @refs;
# if we returned at all, the check succeeded, so we log the action and exit 0
# if we returned at all, all the checks succeeded, so we log the action and exit 0
# logging note: if log failure isn't important enough to block pushes, get rid
# of all the error checking
open my $log_fh, ">>", $ENV{GL_LOG} or die "open log failed: $!\n";
print $log_fh "$ENV{GL_TS} $perm\t" .
substr($oldsha, 0, 14) . "\t" . substr($newsha, 0, 14) .
"\t$ENV{GL_REPO}\t$ref\t$ENV{GL_USER}\t$refex\n";
"\t$ENV{GL_REPO}\t$ref\t$ENV{GL_USER}\t$log_refex\n";
close $log_fh or die "close log failed: $!\n";
exit 0;