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- #!/usr/bin/perl
- use strict;
- use warnings;
- # === update ===
- # this is gitolite's update hook
- # ----------------------------------------------------------------------------
- # find the rc file, then pull the libraries
- # ----------------------------------------------------------------------------
- BEGIN {
- # people with shell access should be allowed to bypass the update hook,
- # simply by setting an env var that the ssh "front door" will never set
- exit 0 if exists $ENV{GL_BYPASS_UPDATE_HOOK};
- die "ENV GL_RC not set\n" unless $ENV{GL_RC};
- die "ENV GL_BINDIR not set\n" unless $ENV{GL_BINDIR};
- }
- use lib $ENV{GL_BINDIR};
- use gitolite_rc;
- use gitolite qw(:DEFAULT %repos);
- # ----------------------------------------------------------------------------
- # start...
- # ----------------------------------------------------------------------------
- my ($perm, $creator, $wild) = repo_rights($ENV{GL_REPO});
- my $reported_repo = $ENV{GL_REPO} . ( $wild ? " ($wild)" : "" );
- # arguments are as supplied to an update hook by git; man githooks
- my ($ref, $oldsha, $newsha) = @ARGV;
- 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
- or $newsha eq '0' x 40;
- # att_acc == attempted access -- what are you trying to do? (is it 'W' or '+'?)
- my $att_acc = 'W';
- # rewriting a tag is considered a rewind, in terms of permissions
- $att_acc = '+' if $ref =~ m(refs/tags/) and $oldsha ne ('0' x 40);
- # non-ff push to ref
- # notice that ref delete looks like a rewind, as it should
- $att_acc = '+' if $oldsha ne $merge_base;
- # were any 'D' perms specified? If they were, it means we have to separate
- # deletes from rewinds, so if the new sha is all 0's, change the '+' to a 'D'
- $att_acc = 'D' if ( $repos{$ENV{GL_REPO}}{DELETE_IS_D} or $repos{'@all'}{DELETE_IS_D} ) and $newsha eq '0' x 40;
- # similarly C for create a branch
- $att_acc = 'C' if ( $repos{$ENV{GL_REPO}}{CREATE_IS_C} or $repos{'@all'}{CREATE_IS_C} ) and $oldsha eq '0' x 40;
- my @allowed_refs;
- # @all repos: see comments in similar code in check_access
- push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{$ENV{GL_USER}} || [] };
- push @allowed_refs, @ { $repos{'@all'} {$ENV{GL_USER}} || [] };
- push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{'@all'} || [] };
- push @allowed_refs, @ { $repos{'@all'} {'@all'} || [] };
- # prepare the list of refs to be checked
- # previously, we just checked $ref -- the ref being updated, which is passed
- # to us by git (see man githooks). Now we also have to treat each NAME being
- # updated as a potential "ref" and check that, if NAME-based restrictions have
- # been specified
- my @refs = ($ref); # the first ref to check is the real one
- # because making it work screws up efficiency like no tomorrow...
- if (exists $repos{$ENV{GL_REPO}}{NAME_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/^/NAME\//; $_; } `git diff --name-only $oldtree $newtree`;
- }
- # we potentially 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 NAME/something. So we do the first one
- # separately to capture it, then run the rest (if any)
- my $log_refex = check_ref(\@allowed_refs, $ENV{GL_REPO}, (shift @refs), $att_acc);
- check_ref (\@allowed_refs, $ENV{GL_REPO}, $_ , $att_acc) for @refs;
- # if we returned at all, all the checks succeeded. Check secondary hooks now
- $UPDATE_CHAINS_TO ||= 'hooks/update.secondary';
- -x $UPDATE_CHAINS_TO and system ( $UPDATE_CHAINS_TO, @ARGV ) and die "$UPDATE_CHAINS_TO died\n";
- # now log it and exit 0 so git can get on with it
- log_it("", "$att_acc\t" . substr($oldsha, 0, 14) . "\t" . substr($newsha, 0, 14) .
- "\t$reported_repo\t$ref\t$log_refex");
- exit 0;
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