see doc/3 for details (look for "separating delete and rewind rights" ---- and for gerrit, this is one more thing it can do that we can too ;-) [the original text was somewhat misleading. We mean "prevent someone from creating a branch that they have permissions to push". That is what is now possible, where it was not possible before.]
118 lines
4.6 KiB
Perl
Executable file
118 lines
4.6 KiB
Perl
Executable file
#!/usr/bin/perl
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
# === update ===
|
|
# this is gitolite's update hook
|
|
|
|
# part of the gitolite (GL) suite
|
|
|
|
# how run: via git, being copied as .git/hooks/update in every repo
|
|
# when: every push
|
|
# input:
|
|
# - see man githooks for STDIN
|
|
# - uses the compiled config file to get permissions info
|
|
# output: based on permissions etc., exit 0 or 1
|
|
# security:
|
|
# - none
|
|
|
|
# robustness:
|
|
|
|
# other notes:
|
|
|
|
# ----------------------------------------------------------------------------
|
|
# common definitions
|
|
# ----------------------------------------------------------------------------
|
|
|
|
our ($GL_CONF_COMPILED, $UPDATE_CHAINS_TO);
|
|
our %repos;
|
|
|
|
# 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};
|
|
|
|
# we should already have the GL_RC env var set when we enter this hook
|
|
die "parse $ENV{GL_RC} failed: " . ($! or $@) unless do $ENV{GL_RC};
|
|
|
|
require "$ENV{GL_BINDIR}/gitolite.pm";
|
|
|
|
my ($perm, $creator, $wild) = &repo_rights($ENV{GL_REPO});
|
|
my $reported_repo = $ENV{GL_REPO} . ( $ENV{GL_REPOPATT} ? " ($ENV{GL_REPOPATT})" : "" );
|
|
|
|
# ----------------------------------------------------------------------------
|
|
# start...
|
|
# ----------------------------------------------------------------------------
|
|
|
|
my @saved_ARGV = @ARGV; # for chaining to another update hook at the end
|
|
|
|
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
|
|
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;
|
|
|
|
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'} || [] };
|
|
|
|
# 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
|
|
# if a new ref is being created, add a special ref to record that
|
|
push @refs, 'refs/heads/CREATE_REF' if $oldsha eq '0' x 40;
|
|
# 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`;
|
|
}
|
|
|
|
# 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 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}, $_ , $att_acc) for @refs;
|
|
|
|
# if we returned at all, all the checks succeeded, so we log the action and exit 0
|
|
|
|
&log_it("$ENV{GL_TS} $att_acc\t" .
|
|
substr($oldsha, 0, 14) . "\t" . substr($newsha, 0, 14) .
|
|
"\t$reported_repo\t$ref\t$ENV{GL_USER}\t$log_refex\n");
|
|
|
|
# now chain to the local admin defined update hook, if present
|
|
$UPDATE_CHAINS_TO ||= 'hooks/update.secondary';
|
|
exec $UPDATE_CHAINS_TO, @saved_ARGV
|
|
if -f $UPDATE_CHAINS_TO or -l $UPDATE_CHAINS_TO;
|
|
|
|
exit 0;
|