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update hook: squelch message for branch deletion

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Ilari pointed out that in case of branch deletion the *new* SHA could be 0,
which causes an ugly

    fatal: Not a valid commit name 0000000000000000000000000000000000000000

Since we consider deletion an extreme form of rewind, the end result does not
change ($merge_base will be unequal to $oldsha anyway), but we do need to
squelch the ugly message.
This commit is contained in:
Sitaram Chamarty
2009-08-25 06:38:05 +05:30
parent 0f726bea9a
commit 92cf77d9c2
1 changed files with 7 additions and 3 deletions
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update-hook.pl
+7 -3
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@@ -55,17 +55,21 @@ my $ref = shift;
my $oldsha = shift;
my $newsha = shift;
my $merge_base = '0' x 40;
# compute a merge-base if both SHAs are non-0, else leave it as '0'x40
# (i.e., for branch create or delete, merge_base == '0'x40)
chomp($merge_base = `git merge-base $oldsha $newsha`)
unless $oldsha eq '0' x 40;
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
# rewriting a tag is considered a rewind, in terms of permissions
$perm = '+' if $ref =~ m(refs/tags/) and $oldsha ne ('0' x 40);
# non-ff push to branch
# non-ff push to branch. Notice that branch delete looks like a rewind, as it
# should
$perm = '+' if $ref =~ m(refs/heads/) and $oldsha ne $merge_base;
my $allowed_refs = $repos{$ENV{GL_REPO}}{$perm}{$ENV{GL_USER}};