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package Gitolite::Hooks::Update;
# everything to do with the update hook
# ----------------------------------------------------------------------
@EXPORT = qw(
update
update_hook
);
use Exporter 'import';
use Gitolite::Rc;
use Gitolite::Common;
use Gitolite::Conf::Load;
use strict;
use warnings;
# ----------------------------------------------------------------------
sub update {
# this is the *real* update hook for gitolite
bypass() if $ENV{GL_BYPASS_ACCESS_CHECKS};
my ( $ref, $oldsha, $newsha, $oldtree, $newtree, $aa ) = args(@ARGV);
trace( 2, $ENV{GL_REPO}, $ENV{GL_USER}, $aa, @ARGV );
my $ret = access( $ENV{GL_REPO}, $ENV{GL_USER}, $aa, $ref );
trigger( 'ACCESS_2', $ENV{GL_REPO}, $ENV{GL_USER}, $aa, $ref, $ret, $oldsha, $newsha );
_die $ret if $ret =~ /DENIED/;
check_vrefs( $ref, $oldsha, $newsha, $oldtree, $newtree, $aa );
gl_log( 'update', $ENV{GL_REPO}, $ENV{GL_USER}, $aa, @ARGV, $ret );
exit 0;
}
sub bypass {
require Cwd;
Cwd->import;
gl_log( 'update', getcwd(), '(' . ( $ENV{USER} || '?' ) . ')', 'bypass', @ARGV );
exit 0;
}
sub check_vrefs {
my ( $ref, $oldsha, $newsha, $oldtree, $newtree, $aa ) = @_;
my $name_seen = 0;
my $n_vrefs = 0;
for my $vref ( vrefs( $ENV{GL_REPO}, $ENV{GL_USER} ) ) {
$n_vrefs++;
if ( $vref =~ m(^VREF/NAME/) ) {
# this one is special; we process it right here, and only once
next if $name_seen++;
for my $ref ( map { chomp; s(^)(VREF/NAME/); $_; } `git diff --name-only $oldtree $newtree` ) {
check_vref( $aa, $ref );
}
} else {
my ( $dummy, $pgm, @args ) = split '/', $vref;
$pgm = _which( "VREF/$pgm", 'x' );
$pgm or _die "'$vref': helper program missing or unexecutable";
open( my $fh, "-|", $pgm, @_, $vref, @args ) or _die "'$vref': can't spawn helper program: $!";
while (<$fh>) {
# print non-vref lines and skip processing (for example,
# normal STDOUT by a normal update hook)
unless (m(^VREF/)) {
print;
next;
}
my ( $ref, $deny_message ) = split( ' ', $_, 2 );
check_vref( $aa, $ref, $deny_message );
}
close($fh) or _die $!
? "Error closing sort pipe: $!"
: "$vref: helper program exit status $?";
}
}
return $n_vrefs;
}
sub check_vref {
my ( $aa, $ref, $deny_message ) = @_;
my $ret = access( $ENV{GL_REPO}, $ENV{GL_USER}, $aa, $ref );
trace( 2, "access($ENV{GL_REPO}, $ENV{GL_USER}, $aa, $ref)", "-> $ret" );
if ( $ret =~ /by fallthru/ ) {
trace( 3, "remember, fallthru is success here!" );
return;
}
trigger( 'ACCESS_2', $ENV{GL_REPO}, $ENV{GL_USER}, $aa, $ref, $ret );
_die "$ret" . ( $deny_message ? "\n$deny_message" : '' ) if $ret =~ /DENIED/;
}
{
my $text = '';
sub update_hook {
if ( not $text ) {
local $/ = undef;
$text = <DATA>;
}
return $text;
}
}
# ----------------------------------------------------------------------
sub args {
my ( $ref, $oldsha, $newsha ) = @_;
my ( $oldtree, $newtree, $aa );
# this is special to git -- the hash of an empty tree
my $empty = '4b825dc642cb6eb9a060e54bf8d69288fbee4904';
$oldtree = $oldsha eq '0' x 40 ? $empty : $oldsha;
$newtree = $newsha eq '0' x 40 ? $empty : $newsha;
my $merge_base = '0' x 40;
# for branch create or delete, merge_base stays at '0'x40
chomp( $merge_base = `git merge-base $oldsha $newsha` )
unless $oldsha eq '0' x 40
or $newsha eq '0' x 40;
$aa = 'W';
# tag rewrite
$aa = '+' if $ref =~ m(refs/tags/) and $oldsha ne ( '0' x 40 );
# non-ff push to ref (including ref delete)
$aa = '+' if $oldsha ne $merge_base;
$aa = 'D' if ( option( $ENV{GL_REPO}, 'DELETE_IS_D' ) ) and $newsha eq '0' x 40;
$aa = 'C' if ( option( $ENV{GL_REPO}, 'CREATE_IS_C' ) ) and $oldsha eq '0' x 40;
# and now "M" commits. All the other accesses (W, +, C, D) were mutually
# exclusive in some sense. Sure a W could be a C or a + could be a D but
# that's by design. A merge commit, however, could still be any of the
# others (except a "D").
# so we have to *append* 'M' to $aa (if the repo has MERGE_CHECK in
# effect and this push contains a merge inside)
if ( option( $ENV{GL_REPO}, 'MERGE_CHECK' ) ) {
if ( $oldsha eq '0' x 40 or $newsha eq '0' x 40 ) {
_warn "ref create/delete ignored for purposes of merge-check\n";
} else {
$aa .= 'M' if `git rev-list -n 1 --merges $oldsha..$newsha` =~ /./;
}
}
return ( $ref, $oldsha, $newsha, $oldtree, $newtree, $aa );
}
1;
__DATA__
#!/usr/bin/perl
use strict;
use warnings;
use lib $ENV{GL_LIBDIR};
use Gitolite::Hooks::Update;
# gitolite update hook
# ----------------------------------------------------------------------
update(); # is not expected to return
exit 1; # so if it does, something is wrong
|
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