git-svn: remove any need for the XML::Simple dependency

XML::Simple was originally required back when I made svn-arch-mirror
because I needed to explictly track renames with Arch.  Then I carried
it over to git-svn because I was afraid somebody could commit an svn
log message that could throw off a non-XML log parser.  Then I noticed
the <n> lines column in the header.  So, no more XML :)

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/contrib/git-svn/git-svn b/contrib/git-svn/git-svn
index 5f23d6b..4391bc3 100755 (executable)
--- a/contrib/git-svn/git-svn
+++ b/contrib/git-svn/git-svn
@@ -21,7 +21,7 @@ $ENV{LC_ALL} = 'C';
 
 # If SVN:: library support is added, please make the dependencies
 # optional and preserve the capability to use the command-line client.
-# See what I do with XML::Simple to make the dependency optional.
+# use eval { require SVN::... } to make it lazy load
 use Carp qw/croak/;
 use IO::File qw//;
 use File::Basename qw/dirname basename/;
@@ -177,8 +177,7 @@ sub fetch {
        push @log_args, "-r$_revision";
        push @log_args, '--stop-on-copy' unless $_no_stop_copy;
 
-       eval { require XML::Simple or croak $! };
-       my $svn_log = $@ ? svn_log_raw(@log_args) : svn_log_xml(@log_args);
+       my $svn_log = svn_log_raw(@log_args);
        @$svn_log = sort { $a->{revision} <=> $b->{revision} } @$svn_log;
 
        my $base = shift @$svn_log or croak "No base revision!\n";
@@ -476,49 +475,6 @@ sub svn_commit_tree {
        return fetch("$rev_committed=$commit")->{revision};
 }
 
-sub svn_log_xml {
-       my (@log_args) = @_;
-       my $log_fh = IO::File->new_tmpfile or croak $!;
-
-       my $pid = fork;
-       defined $pid or croak $!;
-
-       if ($pid == 0) {
-               open STDOUT, '>&', $log_fh or croak $!;
-               exec (qw(svn log --xml), @log_args) or croak $!
-       }
-
-       waitpid $pid, 0;
-       croak $? if $?;
-
-       seek $log_fh, 0, 0;
-       my @svn_log;
-       my $log = XML::Simple::XMLin( $log_fh,
-                               ForceArray => ['path','revision','logentry'],
-                               KeepRoot => 0,
-                               KeyAttr => {    logentry => '+revision',
-                                               paths => '+path' },
-                       )->{logentry};
-       foreach my $r (sort {$a <=> $b} keys %$log) {
-               my $log_msg = $log->{$r};
-               my ($Y,$m,$d,$H,$M,$S) = ($log_msg->{date} =~
-                                       /(\d{4})\-(\d\d)\-(\d\d)T
-                                        (\d\d)\:(\d\d)\:(\d\d)\.\d+Z$/x)
-                                        or croak "Failed to parse date: ",
-                                                $log->{$r}->{date};
-               $log_msg->{date} = "+0000 $Y-$m-$d $H:$M:$S";
-
-               # XML::Simple can't handle <msg></msg> as a string:
-               if (ref $log_msg->{msg} eq 'HASH') {
-                       $log_msg->{msg} = "\n";
-               } else {
-                       $log_msg->{msg} .= "\n";
-               }
-               push @svn_log, $log->{$r};
-       }
-       return \@svn_log;
-}
-
 sub svn_log_raw {
        my (@log_args) = @_;
        my $pid = open my $log_fh,'-|';
@@ -529,21 +485,42 @@ sub svn_log_raw {
        }
 
        my @svn_log;
-       my $state;
+       my $state = 'sep';
        while (<$log_fh>) {
                chomp;
                if (/^\-{72}$/) {
+                       if ($state eq 'msg') {
+                               if ($svn_log[$#svn_log]->{lines}) {
+                                       $svn_log[$#svn_log]->{msg} .= $_."\n";
+                                       unless(--$svn_log[$#svn_log]->{lines}) {
+                                               $state = 'sep';
+                                       }
+                               } else {
+                                       croak "Log parse error at: $_\n",
+                                               $svn_log[$#svn_log]->{revision},
+                                               "\n";
+                               }
+                               next;
+                       }
+                       if ($state ne 'sep') {
+                               croak "Log parse error at: $_\n",
+                                       "state: $state\n",
+                                       $svn_log[$#svn_log]->{revision},
+                                       "\n";
+                       }
                        $state = 'rev';
 
                        # if we have an empty log message, put something there:
                        if (@svn_log) {
                                $svn_log[$#svn_log]->{msg} ||= "\n";
+                               delete $svn_log[$#svn_log]->{lines};
                        }
                        next;
                }
                if ($state eq 'rev' && s/^r(\d+)\s*\|\s*//) {
                        my $rev = $1;
-                       my ($author, $date) = split(/\s*\|\s*/, $_, 2);
+                       my ($author, $date, $lines) = split(/\s*\|\s*/, $_, 3);
+                       ($lines) = ($lines =~ /(\d+)/);
                        my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~
                                        /(\d{4})\-(\d\d)\-(\d\d)\s
                                         (\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x)
@@ -551,6 +528,7 @@ sub svn_log_raw {
                        my %log_msg = ( revision => $rev,
                                        date => "$tz $Y-$m-$d $H:$M:$S",
                                        author => $author,
+                                       lines => $lines,
                                        msg => '' );
                        push @svn_log, \%log_msg;
                        $state = 'msg_start';
@@ -560,7 +538,15 @@ sub svn_log_raw {
                if ($state eq 'msg_start' && /^$/) {
                        $state = 'msg';
                } elsif ($state eq 'msg') {
-                       $svn_log[$#svn_log]->{msg} .= $_."\n";
+                       if ($svn_log[$#svn_log]->{lines}) {
+                               $svn_log[$#svn_log]->{msg} .= $_."\n";
+                               unless (--$svn_log[$#svn_log]->{lines}) {
+                                       $state = 'sep';
+                               }
+                       } else {
+                               croak "Log parse error at: $_\n",
+                                       $svn_log[$#svn_log]->{revision},"\n";
+                       }
                }
        }
        close $log_fh or croak $?;