package Git::SVN::Editor;
use vars qw/@ISA $_rmdir $_cp_similarity $_find_copies_harder $_rename_limit/;
use strict;
use warnings $ENV{GIT_PERL_FATAL_WARNINGS} ? qw(FATAL all) : ();
use SVN::Core;
use SVN::Delta;
use Carp qw/croak/;
use Git qw/command command_oneline command_noisy command_output_pipe
command_input_pipe command_close_pipe
command_bidi_pipe command_close_bidi_pipe
get_record/;
BEGIN {
@ISA = qw(SVN::Delta::Editor);
}
sub new {
my ($class, $opts) = @_;
foreach (qw/svn_path r ra tree_a tree_b log editor_cb/) {
die "$_ required!\n" unless (defined $opts->{$_});
}
my $pool = SVN::Pool->new;
my $mods = generate_diff($opts->{tree_a}, $opts->{tree_b});
my $types = check_diff_paths($opts->{ra}, $opts->{svn_path},
$opts->{r}, $mods);
# $opts->{ra} functions should not be used after this:
my @ce = $opts->{ra}->get_commit_editor($opts->{log},
$opts->{editor_cb}, $pool);
my $self = SVN::Delta::Editor->new(@ce, $pool);
bless $self, $class;
foreach (qw/svn_path r tree_a tree_b/) {
$self->{$_} = $opts->{$_};
}
$self->{url} = $opts->{ra}->{url};
$self->{mods} = $mods;
$self->{types} = $types;
$self->{pool} = $pool;
$self->{bat} = { '' => $self->open_root($self->{r}, $self->{pool}) };
$self->{rm} = { };
$self->{path_prefix} = length $self->{svn_path} ?
"$self->{svn_path}/" : '';
$self->{config} = $opts->{config};
$self->{mergeinfo} = $opts->{mergeinfo};
$self->{pathnameencoding} = Git::config('svn.pathnameencoding');
return $self;
}
sub generate_diff {
my ($tree_a, $tree_b) = @_;
my @diff_tree = qw(diff-tree -z -r);
if ($_cp_similarity) {
push @diff_tree, "-C$_cp_similarity";
} else {
push @diff_tree, '-C';
}
push @diff_tree, '--find-copies-harder' if $_find_copies_harder;
push @diff_tree, "-l$_rename_limit" if defined $_rename_limit;
push @diff_tree, $tree_a, $tree_b;
my ($diff_fh, $ctx) = command_output_pipe(@diff_tree);
my $state = 'meta';
my @mods;
while (defined($_ = get_record($diff_fh, "\0"))) {
if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s
($::oid)\s($::oid)\s
([MTCRAD])\d*$/xo) {
push @mods, { mode_a => $1, mode_b => $2,
sha1_a => $3, sha1_b => $4,
chg => $5 };
if ($5 =~ /^(?:C|R)$/) {
$state = 'file_a';
} else {
$state = 'file_b';
}
} elsif ($state eq 'file_a') {
my $x = $mods[$#mods] or croak "Empty array\n";
if ($x->{chg} !~ /^(?:C|R)$/) {
croak "Error parsing $_, $x->{chg}\n";
}
$x->{file_a} = $_;
$state = 'file_b';
} elsif ($state eq 'file_b') {
my $x = $mods[$#mods] or croak "Empty array\n";
if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) {
croak "Error parsing $_, $x->{chg}\n";
}
if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) {
croak "Error parsing $_, $x->{chg}\n";
}
$x->{file_b} = $_;
$state = 'meta';
} else {
croak "Error parsing $_\n";
}
}
command_close_pipe($diff_fh, $ctx);
\@mods;
}
sub check_diff_paths {
my ($ra, $pfx, $rev, $mods) = @_;
my %types;
$pfx .= '/' if length $pfx;
sub type_diff_paths {
my ($ra, $types, $path, $rev) = @_;
my @p = split m#/+#, $path;
my $c = shift @p;
unless (defined $types->{$c}) {
$types->{$c} = $ra->check_path($c, $rev);
}
while (@p) {
$c .= '/' . shift @p;
next if defined $types->{$c};
$types->{$c} = $ra->check_path($c, $rev);
}
}
foreach my $m (@$mods) {
foreach my $f (qw/file_a file_b/) {
next unless defined $m->{$f};
my ($dir) = ($m->{$f} =~ m#^(.*?)/?(?:[^/]+)$#);
if (length $pfx.$dir && ! defined $types{$dir}) {
type_diff_paths($ra, \%types, $pfx.$dir, $rev);
}
}
}
\%types;
}
sub split_path {
return ($_[0] =~ m#^(.*?)/?([^/]+)$#);
}
sub repo_path {
my ($self, $path) = @_;
if (my $enc = $self->{pathnameencoding}) {
require Encode;
Encode::from_to($path, $enc, 'UTF-8');
}
$self->{path_prefix}.(defined $path ? $path : '');
}
sub url_path {
my ($self, $path) = @_;
$path = $self->repo_path($path);
if ($self->{url} =~ m#^https?://#) {
# characters are taken from subversion/libsvn_subr/path.c
$path =~ s#([^~a-zA-Z0-9_./!$&'()*+,-])#sprintf("%%%02X",ord($1))#eg;
}
$self->{url} . '/' . $path;
}
sub rmdirs {
my ($self) = @_;
my $rm = $self->{rm};
delete $rm->{''}; # we never delete the url we're tracking
return unless %$rm;
foreach (keys %$rm) {
my @d = split m#/#, $_;
my $c = shift @d;
$rm->{$c} = 1;
while (@d) {
$c .= '/' . shift @d;
$rm->{$c} = 1;
}
}
delete $rm->{$self->{svn_path}};
delete $rm->{''}; # we never delete the url we're tracking
return unless %$rm;
my ($fh, $ctx) = command_output_pipe(qw/ls-tree --name-only -r -z/,
$self->{tree_b});
while (defined($_ = get_record($fh, "\0"))) {
my @dn = split m#/#, $_;
while (pop @dn) {
delete $rm->{join '/', @dn};
}
unless (%$rm) {
close $fh;
return;
}
}
command_close_pipe($fh, $ctx);
my ($r, $p, $bat) = ($self->{r}, $self->{pool}, $self->{bat});
foreach my $d (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$rm) {
$self->close_directory($bat->{$d}, $p);
my ($dn) = ($d =~ m#^(.*?)/?(?:[^/]+)$#);
print "\tD+\t$d/\n" unless $::_q;
$self->SUPER::delete_entry($d, $r, $bat->{$dn}, $p);
delete $bat->{$d};
}
}
sub open_or_add_dir {
my ($self, $full_path, $baton, $deletions) = @_;
my $t = $self->{types}->{$full_path};
if (!defined $t) {
die "$full_path not known in r$self->{r} or we have a bug!\n";
}
{
no warnings 'once';
# SVN::Node::none and SVN::Node::file are used only once,
# so we're shutting up Perl's warnings about them.
if ($t == $SVN::Node::none || defined($deletions->{$full_path})) {
return $self->add_directory($full_path, $baton,
undef, -1, $self->{pool});
} elsif ($t == $SVN::Node::dir) {
return $self->open_directory($full_path, $baton,
$self->{r}, $self->{pool});
} # no warnings 'once'
print STDERR "$full_path already exists in repository at ",
"r$self->{r} and it is not a directory (",
($t == $SVN::Node::file ? 'file' : 'unknown'),"/$t)\n";
} # no warnings 'once'
exit 1;
}
sub ensure_path {
my ($self, $path, $deletions) = @_;
my $bat = $self->{bat};
my $repo_path = $self->repo_path($path);
return $bat->{''} unless (length $repo_path);
my @p = split m#/+#, $repo_path;
my $c = shift @p;
$bat->{$c} ||= $self->open_or_add_dir($c, $bat->{''}, $deletions);
while (@p) {
my $c0 = $c;
$c .= '/' . shift @p;
$bat->{$c} ||= $self->open_or_add_dir($c, $bat->{$c0}, $deletions);
}
return $bat->{$c};
}
# Subroutine to convert a globbing pattern to a regular expression.
# From perl cookbook.
sub glob2pat {
my $globstr = shift;
my %patmap = ('*' => '.*', '?' => '.', '[' => '[', ']' => ']');
$globstr =~ s{(.)} { $patmap{$1} || "\Q$1" }ge;
return '^' . $globstr . '$';
}
sub check_autoprop {
my ($self, $pattern, $properties, $file, $fbat) = @_;
# Convert the globbing pattern to a regular expression.
my $regex = glob2pat($pattern);
# Check if the pattern matches the file name.
if($file =~ m/($regex)/) {
# Parse the list of properties to set.
my @props = split(/;/, $properties);
foreach my $prop (@props) {
# Parse 'name=value' syntax and set the property.
if ($prop =~ /([^=]+)=(.*)/) {
my ($n,$v) = ($1,$2);
for ($n, $v) {
s/^\s+//; s/\s+$//;
}
$self->change_file_prop($fbat, $n, $v);
}
}
}
}
sub apply_autoprops {
my ($self, $file, $fbat) = @_;
my $conf_t = ${$self->{config}}{'config'};
no warnings 'once';
# Check [miscellany]/enable-auto-props in svn configuration.
if (SVN::_Core::svn_config_get_bool(
$conf_t,
$SVN::_Core::SVN_CONFIG_SECTION_MISCELLANY,
$SVN::_Core::SVN_CONFIG_OPTION_ENABLE_AUTO_PROPS,
0)) {
# Auto-props are enabled. Enumerate them to look for matches.
my $callback = sub {
$self->check_autoprop($_[0], $_[1], $file, $fbat);
};
SVN::_Core::svn_config_enumerate(
$conf_t,
$SVN::_Core::SVN_CONFIG_SECTION_AUTO_PROPS,
$callback);
}
}
sub check_attr {
my ($attr,$path) = @_;
my $val = command_oneline("check-attr", $attr, "--", $path);
if ($val) { $val =~ s/^[^:]*:\s*[^:]*:\s*(.*)\s*$/$1/; }
return $val;
}
sub apply_manualprops {
my ($self, $file, $fbat) = @_;
my $pending_properties = check_attr( "svn-properties", $file );
if ($pending_properties eq "") { return; }
# Parse the list of properties to set.
my @props = split(/;/, $pending_properties);
# TODO: get existing properties to compare to
# - this fails for add so currently not done
# my $existing_props = ::get_svnprops($file);
my $existing_props = {};
# TODO: caching svn properties or storing them in .gitattributes
# would make that faster
foreach my $prop (@props) {
# Parse 'name=value' syntax and set the property.
if ($prop =~ /([^=]+)=(.*)/) {
my ($n,$v) = ($1,$2);
for ($n, $v) {
s/^\s+//; s/\s+$//;
}
my $existing = $existing_props->{$n};
if (!defined($existing) || $existing ne $v) {
$self->change_file_prop($fbat, $n, $v);
}
}
}
}
sub A {
my ($self, $m, $deletions) = @_;
my ($dir, $file) = split_path($m->{file_b});
my $pbat = $self->ensure_path($dir, $deletions);
my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
undef, -1);
print "\tA\t$m->{file_b}\n" unless $::_q;
$self->apply_autoprops($file, $fbat);
$self->apply_manualprops($m->{file_b}, $fbat);
$self->chg_file($fbat, $m);
$self->close_file($fbat,undef,$self->{pool});
}
sub C {
my ($self, $m, $deletions) = @_;
my ($dir, $file) = split_path($m->{file_b});
my $pbat = $self->ensure_path($dir, $deletions);
# workaround for a bug in svn serf backend (v1.8.5 and below):
# store third argument to ->add_file() in a local variable, to make it
# have the same lifetime as $fbat
my $upa = $self->url_path($m->{file_a});
my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
$upa, $self->{r});
print "\tC\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
$self->apply_manualprops($m->{file_b}, $fbat);
$self->chg_file($fbat, $m);
$self->close_file($fbat,undef,$self->{pool});
}
sub delete_entry {
my ($self, $path, $pbat) = @_;
my $rpath = $self->repo_path($path);
my ($dir, $file) = split_path($rpath);
$self->{rm}->{$dir} = 1;
$self->SUPER::delete_entry($rpath, $self->{r}, $pbat, $self->{pool});
}
sub R {
my ($self, $m, $deletions) = @_;
my ($dir, $file) = split_path($m->{file_b});
my $pbat = $self->ensure_path($dir, $deletions);
# workaround for a bug in svn serf backend, see comment in C() above
my $upa = $self->url_path($m->{file_a});
my $fbat = $self->add_file($self->repo_path($m->{file_b}), $pbat,
$upa, $self->{r});
print "\tR\t$m->{file_a} => $m->{file_b}\n" unless $::_q;
$self->apply_autoprops($file, $fbat);
$self->apply_manualprops($m->{file_b}, $fbat);
$self->chg_file($fbat, $m);
$self->close_file($fbat,undef,$self->{pool});
($dir, $file) = split_path($m->{file_a});
$pbat = $self->ensure_path($dir, $deletions);
$self->delete_entry($m->{file_a}, $pbat);
}
sub M {
my ($self, $m, $deletions) = @_;
my ($dir, $file) = split_path($m->{file_b});
my $pbat = $self->ensure_path($dir, $deletions);
my $fbat = $self->open_file($self->repo_path($m->{file_b}),
$pbat,$self->{r},$self->{pool});
print "\t$m->{chg}\t$m->{file_b}\n" unless $::_q;
$self->apply_manualprops($m->{file_b}, $fbat);
$self->chg_file($fbat, $m);
$self->close_file($fbat,undef,$self->{pool});
}
sub T {
my ($self, $m, $deletions) = @_;
# Work around subversion issue 4091: toggling the "is a
# symlink" property requires removing and re-adding a
# file or else "svn up" on affected clients trips an
# assertion and aborts.
if (($m->{mode_b} =~ /^120/ && $m->{mode_a} !~ /^120/) ||
($m->{mode_b} !~ /^120/ && $m->{mode_a} =~ /^120/)) {
$self->D({
mode_a => $m->{mode_a}, mode_b => '000000',
sha1_a => $m->{sha1_a}, sha1_b => '0' x $::oid_length,
chg => 'D', file_b => $m->{file_b}
}, $deletions);
$self->A({
mode_a => '000000', mode_b => $m->{mode_b},
sha1_a => '0' x $::oid_length, sha1_b => $m->{sha1_b},
chg => 'A', file_b => $m->{file_b}
}, $deletions);
return;
}
$self->M($m, $deletions);
}
sub change_file_prop {
my ($self, $fbat, $pname, $pval) = @_;
$self->SUPER::change_file_prop($fbat, $pname, $pval, $self->{pool});
}
sub change_dir_prop {
my ($self, $pbat, $pname, $pval) = @_;
$self->SUPER::change_dir_prop($pbat, $pname, $pval, $self->{pool});
}
sub _chg_file_get_blob ($$$$) {
my ($self, $fbat, $m, $which) = @_;
my $fh = $::_repository->temp_acquire("git_blob_$which");
if ($m->{"mode_$which"} =~ /^120/) {
print $fh 'link ' or croak $!;
$self->change_file_prop($fbat,'svn:special','*');
} elsif ($m->{mode_a} =~ /^120/ && $m->{"mode_$which"} !~ /^120/) {
$self->change_file_prop($fbat,'svn:special',undef);
}
my $blob = $m->{"sha1_$which"};
return ($fh,) if ($blob =~ /^0+$/);
my $size = $::_repository->cat_blob($blob, $fh);
croak "Failed to read object $blob" if ($size < 0);
$fh->flush == 0 or croak $!;
seek $fh, 0, 0 or croak $!;
my $exp = ::md5sum($fh);
seek $fh, 0, 0 or croak $!;
return ($fh, $exp);
}
sub chg_file {
my ($self, $fbat, $m) = @_;
if ($m->{mode_b} =~ /755$/ && $m->{mode_a} !~ /755$/) {
$self->change_file_prop($fbat,'svn:executable','*');
} elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) {
$self->change_file_prop($fbat,'svn:executable',undef);
}
my ($fh_a, $exp_a) = _chg_file_get_blob $self, $fbat, $m, 'a';
my ($fh_b, $exp_b) = _chg_file_get_blob $self, $fbat, $m, 'b';
my $pool = SVN::Pool->new;
my $atd = $self->apply_textdelta($fbat, $exp_a, $pool);
if (-s $fh_a) {
my $txstream = SVN::TxDelta::new ($fh_a, $fh_b, $pool);
my $res = SVN::TxDelta::send_txstream($txstream, @$atd, $pool);
if (defined $res) {
die "Unexpected result from send_txstream: $res\n",
"(SVN::Core::VERSION: $SVN::Core::VERSION)\n";
}
} else {
my $got = SVN::TxDelta::send_stream($fh_b, @$atd, $pool);
die "Checksum mismatch\nexpected: $exp_b\ngot: $got\n"
if ($got ne $exp_b);
}
Git::temp_release($fh_b, 1);
Git::temp_release($fh_a, 1);
$pool->clear;
}
sub D {
my ($self, $m, $deletions) = @_;
my ($dir, $file) = split_path($m->{file_b});
my $pbat = $self->ensure_path($dir, $deletions);
print "\tD\t$m->{file_b}\n" unless $::_q;
$self->delete_entry($m->{file_b}, $pbat);
}
sub close_edit {
my ($self) = @_;
my ($p,$bat) = ($self->{pool}, $self->{bat});
foreach (sort { $b =~ tr#/#/# <=> $a =~ tr#/#/# } keys %$bat) {
next if $_ eq '';
$self->close_directory($bat->{$_}, $p);
}
$self->close_directory($bat->{''}, $p);
$self->SUPER::close_edit($p);
$p->clear;
}
sub abort_edit {
my ($self) = @_;
$self->SUPER::abort_edit($self->{pool});
}
sub DESTROY {
my $self = shift;
$self->SUPER::DESTROY(@_);
$self->{pool}->clear;
}
# this drives the editor
sub apply_diff {
my ($self) = @_;
my $mods = $self->{mods};
my %o = ( D => 0, C => 1, R => 2, A => 3, M => 4, T => 5 );
my %deletions;
foreach my $m (@$mods) {
if ($m->{chg} eq "D") {
$deletions{$m->{file_b}} = 1;
}
}
foreach my $m (sort { $o{$a->{chg}} <=> $o{$b->{chg}} } @$mods) {
my $f = $m->{chg};
if (defined $o{$f}) {
$self->$f($m, \%deletions);
} else {
fatal("Invalid change type: $f");
}
}
if (defined($self->{mergeinfo})) {
$self->change_dir_prop($self->{bat}{''}, "svn:mergeinfo",
$self->{mergeinfo});
}
$self->rmdirs if $_rmdir;
if (@$mods == 0 && !defined($self->{mergeinfo})) {
$self->abort_edit;
} else {
$self->close_edit;
}
return scalar @$mods;
}
1;
__END__
=head1 NAME
Git::SVN::Editor - commit driver for "git svn set-tree" and dcommit
=head1 SYNOPSIS
use Git::SVN::Editor;
use Git::SVN::Ra;
my $ra = Git::SVN::Ra->new($url);
my %opts = (
r => 19,
log => "log message",
ra => $ra,
config => SVN::Core::config_get_config($svn_config_dir),
tree_a => "$commit^",
tree_b => "$commit",
editor_cb => sub { print "Committed r$_[0]\n"; },
mergeinfo => "/branches/foo:1-10",
svn_path => "trunk"
);
Git::SVN::Editor->new(\%opts)->apply_diff or print "No changes\n";
my $re = Git::SVN::Editor::glob2pat("trunk/*");
if ($branchname =~ /$re/) {
print "matched!\n";
}
=head1 DESCRIPTION
This module is an implementation detail of the "git svn" command.
Do not use it unless you are developing git-svn.
This module adapts the C<SVN::Delta::Editor> object returned by
C<SVN::Delta::get_commit_editor> and drives it to convey the
difference between two git tree objects to a remote Subversion
repository.
The interface will change as git-svn evolves.
=head1 DEPENDENCIES
Subversion perl bindings,
the core L<Carp> module,
and git's L<Git> helper module.
C<Git::SVN::Editor> has not been tested using callers other than
B<git-svn> itself.
=head1 SEE ALSO
L<SVN::Delta>,
L<Git::SVN::Fetcher>.
=head1 INCOMPATIBILITIES
None reported.
=head1 BUGS
None.
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