98 lines
4.2 KiB
Perl
Executable file
98 lines
4.2 KiB
Perl
Executable file
#!/usr/bin/perl
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use strict;
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use warnings;
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# === update ===
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# this is gitolite's update hook
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# ----------------------------------------------------------------------------
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# find the rc file, then pull the libraries
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# ----------------------------------------------------------------------------
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BEGIN {
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# people with shell access should be allowed to bypass the update hook,
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# simply by setting an env var that the ssh "front door" will never set
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exit 0 if exists $ENV{GL_BYPASS_UPDATE_HOOK};
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die "ENV GL_RC not set\n" unless $ENV{GL_RC};
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die "ENV GL_BINDIR not set\n" unless $ENV{GL_BINDIR};
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}
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use lib $ENV{GL_BINDIR};
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use gitolite_rc;
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use gitolite qw(:DEFAULT %repos);
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# ----------------------------------------------------------------------------
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# start...
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# ----------------------------------------------------------------------------
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my ($perm, $creator, $wild) = repo_rights($ENV{GL_REPO});
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my $reported_repo = $ENV{GL_REPO} . ( $wild ? " ($wild)" : "" );
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# arguments are as supplied to an update hook by git; man githooks
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my ($ref, $oldsha, $newsha) = @ARGV;
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my $merge_base = '0' x 40;
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# compute a merge-base if both SHAs are non-0, else leave it as '0'x40
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# (i.e., for branch create or delete, merge_base == '0'x40)
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chomp($merge_base = `git merge-base $oldsha $newsha`)
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unless $oldsha eq '0' x 40
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or $newsha eq '0' x 40;
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# att_acc == attempted access -- what are you trying to do? (is it 'W' or '+'?)
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my $att_acc = 'W';
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# rewriting a tag is considered a rewind, in terms of permissions
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$att_acc = '+' if $ref =~ m(refs/tags/) and $oldsha ne ('0' x 40);
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# non-ff push to ref
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# notice that ref delete looks like a rewind, as it should
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$att_acc = '+' if $oldsha ne $merge_base;
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# were any 'D' perms specified? If they were, it means we have to separate
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# deletes from rewinds, so if the new sha is all 0's, change the '+' to a 'D'
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$att_acc = 'D' if ( $repos{$ENV{GL_REPO}}{DELETE_IS_D} or $repos{'@all'}{DELETE_IS_D} ) and $newsha eq '0' x 40;
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# similarly C for create a branch
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$att_acc = 'C' if ( $repos{$ENV{GL_REPO}}{CREATE_IS_C} or $repos{'@all'}{CREATE_IS_C} ) and $oldsha eq '0' x 40;
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my @allowed_refs;
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# @all repos: see comments in similar code in check_access
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push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{$ENV{GL_USER}} || [] };
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push @allowed_refs, @ { $repos{'@all'} {$ENV{GL_USER}} || [] };
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push @allowed_refs, @ { $repos{$ENV{GL_REPO}}{'@all'} || [] };
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# prepare the list of refs to be checked
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# previously, we just checked $ref -- the ref being updated, which is passed
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# to us by git (see man githooks). Now we also have to treat each NAME being
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# updated as a potential "ref" and check that, if NAME-based restrictions have
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# been specified
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my @refs = ($ref); # the first ref to check is the real one
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# because making it work screws up efficiency like no tomorrow...
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if (exists $repos{$ENV{GL_REPO}}{NAME_LIMITS}) {
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# this is special to git -- the hash of an empty tree
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my $empty='4b825dc642cb6eb9a060e54bf8d69288fbee4904';
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# well they're not really "trees" but $empty is indeed the empty tree so
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# we can just pretend $oldsha/$newsha are also trees, and anyway 'git
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# diff' only wants trees
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my $oldtree = $oldsha eq '0' x 40 ? $empty : $oldsha;
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my $newtree = $newsha eq '0' x 40 ? $empty : $newsha;
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push @refs, map { chomp; s/^/NAME\//; $_; } `git diff --name-only $oldtree $newtree`;
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}
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# we potentially have many "refs" to check. The one we print in the log is
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# the *first* one (which is a *real* ref, like refs/heads/master), while all
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# the rest (if they exist) are like NAME/something. So we do the first one
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# separately to capture it, then run the rest (if any)
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my $log_refex = check_ref(\@allowed_refs, $ENV{GL_REPO}, (shift @refs), $att_acc);
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check_ref (\@allowed_refs, $ENV{GL_REPO}, $_ , $att_acc) for @refs;
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# if we returned at all, all the checks succeeded. Check secondary hooks now
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$UPDATE_CHAINS_TO ||= 'hooks/update.secondary';
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-x $UPDATE_CHAINS_TO and system ( $UPDATE_CHAINS_TO, @ARGV ) and die "$UPDATE_CHAINS_TO died\n";
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# now log it and exit 0 so git can get on with it
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log_it("", "$att_acc\t" . substr($oldsha, 0, 14) . "\t" . substr($newsha, 0, 14) .
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"\t$reported_repo\t$ref\t$log_refex");
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exit 0;
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