pack_refs(): remove redundant check
[gitweb.git] / git-svn.perl
index ef1d30db3889d0d33b43b1d15cd19281291f5aea..eeb83d375931df81bd87ca285c8d0741c14f33a2 100755 (executable)
@@ -1,11 +1,12 @@
 #!/usr/bin/env perl
 # Copyright (C) 2006, Eric Wong <normalperson@yhbt.net>
 # License: GPL v2 or later
+use 5.008;
 use warnings;
 use strict;
 use vars qw/   $AUTHOR $VERSION
                $sha1 $sha1_short $_revision $_repository
-               $_q $_authors %users/;
+               $_q $_authors $_authors_prog %users/;
 $AUTHOR = 'Eric Wong <normalperson@yhbt.net>';
 $VERSION = '@@GIT_VERSION@@';
 
 $Git::SVN::default_repo_id = 'svn';
 $Git::SVN::default_ref_id = $ENV{GIT_SVN_ID} || 'git-svn';
 $Git::SVN::Ra::_log_window_size = 100;
+$Git::SVN::_minimize_url = 'unset';
+
+if (! exists $ENV{SVN_SSH} && exists $ENV{GIT_SSH}) {
+       $ENV{SVN_SSH} = $ENV{GIT_SSH};
+}
+
+if (exists $ENV{SVN_SSH} && $^O eq 'msys') {
+       $ENV{SVN_SSH} =~ s/\\/\\\\/g;
+       $ENV{SVN_SSH} =~ s/(.*)/"$1"/;
+}
 
 $Git::SVN::Log::TZ = $ENV{TZ};
 $ENV{TZ} = 'UTC';
 $| = 1; # unbuffer STDOUT
 
 sub fatal (@) { print STDERR "@_\n"; exit 1 }
-require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
-require SVN::Ra;
-require SVN::Delta;
-if ($SVN::Core::VERSION lt '1.1.0') {
-       fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
+sub _req_svn {
+       require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
+       require SVN::Ra;
+       require SVN::Delta;
+       if ($SVN::Core::VERSION lt '1.1.0') {
+               fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
+       }
 }
+my $can_compress = eval { require Compress::Zlib; 1};
 push @Git::SVN::Ra::ISA, 'SVN::Ra';
 push @SVN::Git::Editor::ISA, 'SVN::Delta::Editor';
 push @SVN::Git::Fetcher::ISA, 'SVN::Delta::Editor';
 use IO::File qw//;
 use File::Basename qw/dirname basename/;
 use File::Path qw/mkpath/;
+use File::Spec;
+use File::Find;
 use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
 use IPC::Open3;
 use Git;
+use Memoize;  # core since 5.8.0, Jul 2002
 
 BEGIN {
        # import functions from Git into our packages, en masse
@@ -55,6 +72,8 @@ BEGIN
                        *{"${package}::$_"} = \&{"Git::$_"};
                }
        }
+       Memoize::memoize 'Git::config';
+       Memoize::memoize 'Git::config_bool';
 }
 
 my ($SVN);
@@ -62,20 +81,23 @@ BEGIN
 $sha1 = qr/[a-f\d]{40}/;
 $sha1_short = qr/[a-f\d]{4,40}/;
 my ($_stdin, $_help, $_edit,
-       $_message, $_file,
+       $_message, $_file, $_branch_dest,
        $_template, $_shared,
        $_version, $_fetch_all, $_no_rebase, $_fetch_parent,
        $_merge, $_strategy, $_dry_run, $_local,
        $_prefix, $_no_checkout, $_url, $_verbose,
-       $_git_format, $_commit_url, $_tag);
+       $_git_format, $_commit_url, $_tag, $_merge_info, $_interactive);
 $Git::SVN::_follow_parent = 1;
+$SVN::Git::Fetcher::_placeholder_filename = ".gitignore";
 $_q ||= 0;
 my %remote_opts = ( 'username=s' => \$Git::SVN::Prompt::_username,
                     'config-dir=s' => \$Git::SVN::Ra::config_dir,
                     'no-auth-cache' => \$Git::SVN::Prompt::_no_auth_cache,
-                    'ignore-paths=s' => \$SVN::Git::Fetcher::_ignore_regex );
+                    'ignore-paths=s' => \$SVN::Git::Fetcher::_ignore_regex,
+                    'ignore-refs=s' => \$Git::SVN::Ra::_ignore_refs_regex );
 my %fc_opts = ( 'follow-parent|follow!' => \$Git::SVN::_follow_parent,
                'authors-file|A=s' => \$_authors,
+               'authors-prog=s' => \$_authors_prog,
                'repack:i' => \$Git::SVN::_repack,
                'noMetadata' => \$Git::SVN::_no_metadata,
                'useSvmProps' => \$Git::SVN::_use_svm_props,
@@ -90,17 +112,18 @@ BEGIN
                'localtime' => \$Git::SVN::_localtime,
                %remote_opts );
 
-my ($_trunk, $_tags, $_branches, $_stdlayout);
+my ($_trunk, @_tags, @_branches, $_stdlayout);
 my %icv;
 my %init_opts = ( 'template=s' => \$_template, 'shared:s' => \$_shared,
-                  'trunk|T=s' => \$_trunk, 'tags|t=s' => \$_tags,
-                  'branches|b=s' => \$_branches, 'prefix=s' => \$_prefix,
+                  'trunk|T=s' => \$_trunk, 'tags|t=s@' => \@_tags,
+                  'branches|b=s@' => \@_branches, 'prefix=s' => \$_prefix,
                   'stdlayout|s' => \$_stdlayout,
-                  'minimize-url|m' => \$Git::SVN::_minimize_url,
+                  'minimize-url|m!' => \$Git::SVN::_minimize_url,
                  'no-metadata' => sub { $icv{noMetadata} = 1 },
                  'use-svm-props' => sub { $icv{useSvmProps} = 1 },
                  'use-svnsync-props' => sub { $icv{useSvnsyncProps} = 1 },
                  'rewrite-root=s' => sub { $icv{rewriteRoot} = $_[1] },
+                 'rewrite-uuid=s' => sub { $icv{rewriteUUID} = $_[1] },
                   %remote_opts );
 my %cmt_opts = ( 'edit|e' => \$_edit,
                'rmdir' => \$SVN::Git::Editor::_rmdir,
@@ -117,6 +140,10 @@ BEGIN
                           %fc_opts } ],
        clone => [ \&cmd_clone, "Initialize and fetch revisions",
                        { 'revision|r=s' => \$_revision,
+                         'preserve-empty-dirs' =>
+                               \$SVN::Git::Fetcher::_preserve_empty_dirs,
+                         'placeholder-filename=s' =>
+                               \$SVN::Git::Fetcher::_placeholder_filename,
                           %fc_opts, %init_opts } ],
        init => [ \&cmd_init, "Initialize a repo for tracking" .
                          " (requires URL argument)",
@@ -135,16 +162,24 @@ BEGIN
                          'commit-url=s' => \$_commit_url,
                          'revision|r=i' => \$_revision,
                          'no-rebase' => \$_no_rebase,
+                         'mergeinfo=s' => \$_merge_info,
+                         'interactive|i' => \$_interactive,
                        %cmt_opts, %fc_opts } ],
        branch => [ \&cmd_branch,
                    'Create a branch in the SVN repository',
                    { 'message|m=s' => \$_message,
+                     'destination|d=s' => \$_branch_dest,
                      'dry-run|n' => \$_dry_run,
-                     'tag|t' => \$_tag } ],
+                     'tag|t' => \$_tag,
+                     'username=s' => \$Git::SVN::Prompt::_username,
+                     'commit-url=s' => \$_commit_url } ],
        tag => [ sub { $_tag = 1; cmd_branch(@_) },
                 'Create a tag in the SVN repository',
                 { 'message|m=s' => \$_message,
-                  'dry-run|n' => \$_dry_run } ],
+                  'destination|d=s' => \$_branch_dest,
+                  'dry-run|n' => \$_dry_run,
+                  'username=s' => \$Git::SVN::Prompt::_username,
+                  'commit-url=s' => \$_commit_url } ],
        'set-tree' => [ \&cmd_set_tree,
                        "Set an SVN repository to a git tree-ish",
                        { 'stdin' => \$_stdin, %cmt_opts, %fc_opts, } ],
@@ -152,6 +187,9 @@ BEGIN
                             'Create a .gitignore per svn:ignore',
                             { 'revision|r=i' => \$_revision
                             } ],
+       'mkdirs' => [ \&cmd_mkdirs ,
+                     "recreate empty directories after a checkout",
+                     { 'revision|r=i' => \$_revision } ],
         'propget' => [ \&cmd_propget,
                       'Print the value of a property on a file or directory',
                       { 'revision|r=i' => \$_revision } ],
@@ -209,14 +247,46 @@ BEGIN
        'blame' => [ \&Git::SVN::Log::cmd_blame,
                    "Show what revision and author last modified each line of a file",
                    { 'git-format' => \$_git_format } ],
+       'reset' => [ \&cmd_reset,
+                    "Undo fetches back to the specified SVN revision",
+                    { 'revision|r=s' => \$_revision,
+                      'parent|p' => \$_fetch_parent } ],
+       'gc' => [ \&cmd_gc,
+                 "Compress unhandled.log files in .git/svn and remove " .
+                 "index files in .git/svn",
+               {} ],
 );
 
+use Term::ReadLine;
+package FakeTerm;
+sub new {
+       my ($class, $reason) = @_;
+       return bless \$reason, shift;
+}
+sub readline {
+       my $self = shift;
+       die "Cannot use readline on FakeTerm: $$self";
+}
+package main;
+
+my $term = eval {
+       $ENV{"GIT_SVN_NOTTY"}
+               ? new Term::ReadLine 'git-svn', \*STDIN, \*STDOUT
+               : new Term::ReadLine 'git-svn';
+};
+if ($@) {
+       $term = new FakeTerm "$@: going non-interactive";
+}
+
 my $cmd;
 for (my $i = 0; $i < @ARGV; $i++) {
        if (defined $cmd{$ARGV[$i]}) {
                $cmd = $ARGV[$i];
                splice @ARGV, $i, 1;
                last;
+       } elsif ($ARGV[$i] eq 'help') {
+               $cmd = $ARGV[$i+1];
+               usage(0);
        }
 };
 
@@ -247,11 +317,11 @@ BEGIN
 
 my %opts = %{$cmd{$cmd}->[2]} if (defined $cmd);
 
-read_repo_config(\%opts);
+read_git_config(\%opts);
 if ($cmd && ($cmd eq 'log' || $cmd eq 'blame')) {
        Getopt::Long::Configure('pass_through');
 }
-my $rv = GetOptions(%opts, 'help|H|h' => \$_help, 'version|V' => \$_version,
+my $rv = GetOptions(%opts, 'h|H' => \$_help, 'version|V' => \$_version,
                     'minimize-connections' => \$Git::SVN::Migration::_minimize,
                     'id|i=s' => \$Git::SVN::default_ref_id,
                     'svn-remote|remote|R=s' => sub {
@@ -263,6 +333,9 @@ BEGIN
 version() if $_version;
 usage(1) unless defined $cmd;
 load_authors() if $_authors;
+if (defined $_authors_prog) {
+       $_authors_prog = "'" . File::Spec->rel2abs($_authors_prog) . "'";
+}
 
 unless ($cmd =~ /^(?:clone|init|multi-init|commit-diff)$/) {
        Git::SVN::Migration::migration_check();
@@ -310,10 +383,41 @@ sub usage {
 }
 
 sub version {
+       ::_req_svn();
        print "git-svn version $VERSION (svn $SVN::Core::VERSION)\n";
        exit 0;
 }
 
+sub ask {
+       my ($prompt, %arg) = @_;
+       my $valid_re = $arg{valid_re};
+       my $default = $arg{default};
+       my $resp;
+       my $i = 0;
+
+       if ( !( defined($term->IN)
+            && defined( fileno($term->IN) )
+            && defined( $term->OUT )
+            && defined( fileno($term->OUT) ) ) ){
+               return defined($default) ? $default : undef;
+       }
+
+       while ($i++ < 10) {
+               $resp = $term->readline($prompt);
+               if (!defined $resp) { # EOF
+                       print "\n";
+                       return defined $default ? $default : undef;
+               }
+               if ($resp eq '' and defined $default) {
+                       return $default;
+               }
+               if (!defined $valid_re or $resp =~ /$valid_re/) {
+                       return $resp;
+               }
+       }
+       return undef;
+}
+
 sub do_git_init_db {
        unless (-d $ENV{GIT_DIR}) {
                my @init_db = ('init');
@@ -328,7 +432,6 @@ sub do_git_init_db {
                command_noisy(@init_db);
                $_repository = Git->repository(Repository => ".git");
        }
-       command_noisy('config', 'core.autocrlf', 'false');
        my $set;
        my $pfx = "svn-remote.$Git::SVN::default_repo_id";
        foreach my $i (keys %icv) {
@@ -337,9 +440,18 @@ sub do_git_init_db {
                command_noisy('config', "$pfx.$i", $icv{$i});
                $set = $i;
        }
-       my $ignore_regex = \$SVN::Git::Fetcher::_ignore_regex;
-       command_noisy('config', "$pfx.ignore-paths", $$ignore_regex)
-               if defined $$ignore_regex;
+       my $ignore_paths_regex = \$SVN::Git::Fetcher::_ignore_regex;
+       command_noisy('config', "$pfx.ignore-paths", $$ignore_paths_regex)
+               if defined $$ignore_paths_regex;
+       my $ignore_refs_regex = \$Git::SVN::Ra::_ignore_refs_regex;
+       command_noisy('config', "$pfx.ignore-refs", $$ignore_refs_regex)
+               if defined $$ignore_refs_regex;
+
+       if (defined $SVN::Git::Fetcher::_preserve_empty_dirs) {
+               my $fname = \$SVN::Git::Fetcher::_placeholder_filename;
+               command_noisy('config', "$pfx.preserve-empty-dirs", 'true');
+               command_noisy('config', "$pfx.placeholder-filename", $$fname);
+       }
 }
 
 sub init_subdir {
@@ -353,30 +465,38 @@ sub init_subdir {
 sub cmd_clone {
        my ($url, $path) = @_;
        if (!defined $path &&
-           (defined $_trunk || defined $_branches || defined $_tags ||
+           (defined $_trunk || @_branches || @_tags ||
             defined $_stdlayout) &&
            $url !~ m#^[a-z\+]+://#) {
                $path = $url;
        }
        $path = basename($url) if !defined $path || !length $path;
+       my $authors_absolute = $_authors ? File::Spec->rel2abs($_authors) : "";
        cmd_init($url, $path);
+       command_oneline('config', 'svn.authorsfile', $authors_absolute)
+           if $_authors;
        Git::SVN::fetch_all($Git::SVN::default_repo_id);
 }
 
 sub cmd_init {
        if (defined $_stdlayout) {
                $_trunk = 'trunk' if (!defined $_trunk);
-               $_tags = 'tags' if (!defined $_tags);
-               $_branches = 'branches' if (!defined $_branches);
+               @_tags = 'tags' if (! @_tags);
+               @_branches = 'branches' if (! @_branches);
        }
-       if (defined $_trunk || defined $_branches || defined $_tags) {
+       if (defined $_trunk || @_branches || @_tags) {
                return cmd_multi_init(@_);
        }
        my $url = shift or die "SVN repository location required ",
                               "as a command-line argument\n";
+       $url = canonicalize_url($url);
        init_subdir(@_);
        do_git_init_db();
 
+       if ($Git::SVN::_minimize_url eq 'unset') {
+               $Git::SVN::_minimize_url = 0;
+       }
+
        Git::SVN->init($url);
 }
 
@@ -389,6 +509,7 @@ sub cmd_fetch {
        if (@_ > 1) {
                die "Usage: $0 fetch [--all] [--parent] [svn-remote]\n";
        }
+       $Git::SVN::no_reuse_existing = undef;
        if ($_fetch_parent) {
                my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
                unless ($gs) {
@@ -442,14 +563,218 @@ sub cmd_set_tree {
        unlink $gs->{index};
 }
 
+sub split_merge_info_range {
+       my ($range) = @_;
+       if ($range =~ /(\d+)-(\d+)/) {
+               return (int($1), int($2));
+       } else {
+               return (int($range), int($range));
+       }
+}
+
+sub combine_ranges {
+       my ($in) = @_;
+
+       my @fnums = ();
+       my @arr = split(/,/, $in);
+       for my $element (@arr) {
+               my ($start, $end) = split_merge_info_range($element);
+               push @fnums, $start;
+       }
+
+       my @sorted = @arr [ sort {
+               $fnums[$a] <=> $fnums[$b]
+       } 0..$#arr ];
+
+       my @return = ();
+       my $last = -1;
+       my $first = -1;
+       for my $element (@sorted) {
+               my ($start, $end) = split_merge_info_range($element);
+
+               if ($last == -1) {
+                       $first = $start;
+                       $last = $end;
+                       next;
+               }
+               if ($start <= $last+1) {
+                       if ($end > $last) {
+                               $last = $end;
+                       }
+                       next;
+               }
+               if ($first == $last) {
+                       push @return, "$first";
+               } else {
+                       push @return, "$first-$last";
+               }
+               $first = $start;
+               $last = $end;
+       }
+
+       if ($first != -1) {
+               if ($first == $last) {
+                       push @return, "$first";
+               } else {
+                       push @return, "$first-$last";
+               }
+       }
+
+       return join(',', @return);
+}
+
+sub merge_revs_into_hash {
+       my ($hash, $minfo) = @_;
+       my @lines = split(' ', $minfo);
+
+       for my $line (@lines) {
+               my ($branchpath, $revs) = split(/:/, $line);
+
+               if (exists($hash->{$branchpath})) {
+                       # Merge the two revision sets
+                       my $combined = "$hash->{$branchpath},$revs";
+                       $hash->{$branchpath} = combine_ranges($combined);
+               } else {
+                       # Just do range combining for consolidation
+                       $hash->{$branchpath} = combine_ranges($revs);
+               }
+       }
+}
+
+sub merge_merge_info {
+       my ($mergeinfo_one, $mergeinfo_two) = @_;
+       my %result_hash = ();
+
+       merge_revs_into_hash(\%result_hash, $mergeinfo_one);
+       merge_revs_into_hash(\%result_hash, $mergeinfo_two);
+
+       my $result = '';
+       # Sort below is for consistency's sake
+       for my $branchname (sort keys(%result_hash)) {
+               my $revlist = $result_hash{$branchname};
+               $result .= "$branchname:$revlist\n"
+       }
+       return $result;
+}
+
+sub populate_merge_info {
+       my ($d, $gs, $uuid, $linear_refs, $rewritten_parent) = @_;
+
+       my %parentshash;
+       read_commit_parents(\%parentshash, $d);
+       my @parents = @{$parentshash{$d}};
+       if ($#parents > 0) {
+               # Merge commit
+               my $all_parents_ok = 1;
+               my $aggregate_mergeinfo = '';
+               my $rooturl = $gs->repos_root;
+
+               if (defined($rewritten_parent)) {
+                       # Replace first parent with newly-rewritten version
+                       shift @parents;
+                       unshift @parents, $rewritten_parent;
+               }
+
+               foreach my $parent (@parents) {
+                       my ($branchurl, $svnrev, $paruuid) =
+                               cmt_metadata($parent);
+
+                       unless (defined($svnrev)) {
+                               # Should have been caught be preflight check
+                               fatal "merge commit $d has ancestor $parent, but that change "
+                     ."does not have git-svn metadata!";
+                       }
+                       unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
+                               fatal "commit $parent git-svn metadata changed mid-run!";
+                       }
+                       my $branchpath = $1;
+
+                       my $ra = Git::SVN::Ra->new($branchurl);
+                       my (undef, undef, $props) =
+                               $ra->get_dir(canonicalize_path("."), $svnrev);
+                       my $par_mergeinfo = $props->{'svn:mergeinfo'};
+                       unless (defined $par_mergeinfo) {
+                               $par_mergeinfo = '';
+                       }
+                       # Merge previous mergeinfo values
+                       $aggregate_mergeinfo =
+                               merge_merge_info($aggregate_mergeinfo,
+                                                                $par_mergeinfo, 0);
+
+                       next if $parent eq $parents[0]; # Skip first parent
+                       # Add new changes being placed in tree by merge
+                       my @cmd = (qw/rev-list --reverse/,
+                                          $parent, qw/--not/);
+                       foreach my $par (@parents) {
+                               unless ($par eq $parent) {
+                                       push @cmd, $par;
+                               }
+                       }
+                       my @revsin = ();
+                       my ($revlist, $ctx) = command_output_pipe(@cmd);
+                       while (<$revlist>) {
+                               my $irev = $_;
+                               chomp $irev;
+                               my (undef, $csvnrev, undef) =
+                                       cmt_metadata($irev);
+                               unless (defined $csvnrev) {
+                                       # A child is missing SVN annotations...
+                                       # this might be OK, or might not be.
+                                       warn "W:child $irev is merged into revision "
+                                                ."$d but does not have git-svn metadata. "
+                                                ."This means git-svn cannot determine the "
+                                                ."svn revision numbers to place into the "
+                                                ."svn:mergeinfo property. You must ensure "
+                                                ."a branch is entirely committed to "
+                                                ."SVN before merging it in order for "
+                                                ."svn:mergeinfo population to function "
+                                                ."properly";
+                               }
+                               push @revsin, $csvnrev;
+                       }
+                       command_close_pipe($revlist, $ctx);
+
+                       last unless $all_parents_ok;
+
+                       # We now have a list of all SVN revnos which are
+                       # merged by this particular parent. Integrate them.
+                       next if $#revsin == -1;
+                       my $newmergeinfo = "$branchpath:" . join(',', @revsin);
+                       $aggregate_mergeinfo =
+                               merge_merge_info($aggregate_mergeinfo,
+                                                                $newmergeinfo, 1);
+               }
+               if ($all_parents_ok and $aggregate_mergeinfo) {
+                       return $aggregate_mergeinfo;
+               }
+       }
+
+       return undef;
+}
+
 sub cmd_dcommit {
        my $head = shift;
+       command_noisy(qw/update-index --refresh/);
        git_cmd_try { command_oneline(qw/diff-index --quiet HEAD/) }
                'Cannot dcommit with a dirty index.  Commit your changes first, '
                . "or stash them with `git stash'.\n";
        $head ||= 'HEAD';
+
+       my $old_head;
+       if ($head ne 'HEAD') {
+               $old_head = eval {
+                       command_oneline([qw/symbolic-ref -q HEAD/])
+               };
+               if ($old_head) {
+                       $old_head =~ s{^refs/heads/}{};
+               } else {
+                       $old_head = eval { command_oneline(qw/rev-parse HEAD/) };
+               }
+               command(['checkout', $head], STDERR => 0);
+       }
+
        my @refs;
-       my ($url, $rev, $uuid, $gs) = working_head_info($head, \@refs);
+       my ($url, $rev, $uuid, $gs) = working_head_info('HEAD', \@refs);
        unless ($gs) {
                die "Unable to determine upstream SVN information from ",
                    "$head history.\nPerhaps the repository is empty.";
@@ -461,7 +786,7 @@ sub cmd_dcommit {
                $url = eval { command_oneline('config', '--get',
                              "svn-remote.$gs->{repo_id}.commiturl") };
                if (!$url) {
-                       $url = $gs->full_url
+                       $url = $gs->full_pushurl
                }
        }
 
@@ -476,8 +801,88 @@ sub cmd_dcommit {
                     "If these changes depend on each other, re-running ",
                     "without --no-rebase may be required."
        }
+
+       if (defined $_interactive){
+               my $ask_default = "y";
+               foreach my $d (@$linear_refs){
+                       my ($fh, $ctx) = command_output_pipe(qw(show --summary), "$d");
+                       while (<$fh>){
+                               print $_;
+                       }
+                       command_close_pipe($fh, $ctx);
+                       $_ = ask("Commit this patch to SVN? ([y]es (default)|[n]o|[q]uit|[a]ll): ",
+                                valid_re => qr/^(?:yes|y|no|n|quit|q|all|a)/i,
+                                default => $ask_default);
+                       die "Commit this patch reply required" unless defined $_;
+                       if (/^[nq]/i) {
+                               exit(0);
+                       } elsif (/^a/i) {
+                               last;
+                       }
+               }
+       }
+
        my $expect_url = $url;
+
+       my $push_merge_info = eval {
+               command_oneline(qw/config --get svn.pushmergeinfo/)
+               };
+       if (not defined($push_merge_info)
+                       or $push_merge_info eq "false"
+                       or $push_merge_info eq "no"
+                       or $push_merge_info eq "never") {
+               $push_merge_info = 0;
+       }
+
+       unless (defined($_merge_info) || ! $push_merge_info) {
+               # Preflight check of changes to ensure no issues with mergeinfo
+               # This includes check for uncommitted-to-SVN parents
+               # (other than the first parent, which we will handle),
+               # information from different SVN repos, and paths
+               # which are not underneath this repository root.
+               my $rooturl = $gs->repos_root;
+               foreach my $d (@$linear_refs) {
+                       my %parentshash;
+                       read_commit_parents(\%parentshash, $d);
+                       my @realparents = @{$parentshash{$d}};
+                       if ($#realparents > 0) {
+                               # Merge commit
+                               shift @realparents; # Remove/ignore first parent
+                               foreach my $parent (@realparents) {
+                                       my ($branchurl, $svnrev, $paruuid) = cmt_metadata($parent);
+                                       unless (defined $paruuid) {
+                                               # A parent is missing SVN annotations...
+                                               # abort the whole operation.
+                                               fatal "$parent is merged into revision $d, "
+                                                        ."but does not have git-svn metadata. "
+                                                        ."Either dcommit the branch or use a "
+                                                        ."local cherry-pick, FF merge, or rebase "
+                                                        ."instead of an explicit merge commit.";
+                                       }
+
+                                       unless ($paruuid eq $uuid) {
+                                               # Parent has SVN metadata from different repository
+                                               fatal "merge parent $parent for change $d has "
+                                                        ."git-svn uuid $paruuid, while current change "
+                                                        ."has uuid $uuid!";
+                                       }
+
+                                       unless ($branchurl =~ /^\Q$rooturl\E(.*)/) {
+                                               # This branch is very strange indeed.
+                                               fatal "merge parent $parent for $d is on branch "
+                                                        ."$branchurl, which is not under the "
+                                                        ."git-svn root $rooturl!";
+                                       }
+                               }
+                       }
+               }
+       }
+
+       my $rewritten_parent;
        Git::SVN::remove_username($expect_url);
+       if (defined($_merge_info)) {
+               $_merge_info =~ tr{ }{\n};
+       }
        while (1) {
                my $d = shift @$linear_refs or last;
                unless (defined $last_rev) {
@@ -491,6 +896,14 @@ sub cmd_dcommit {
                        print "diff-tree $d~1 $d\n";
                } else {
                        my $cmt_rev;
+
+                       unless (defined($_merge_info) || ! $push_merge_info) {
+                               $_merge_info = populate_merge_info($d, $gs,
+                                                            $uuid,
+                                                            $linear_refs,
+                                                            $rewritten_parent);
+                       }
+
                        my %ed_opts = ( r => $last_rev,
                                        log => get_commit_entry($d)->{log},
                                        ra => Git::SVN::Ra->new($url),
@@ -503,6 +916,7 @@ sub cmd_dcommit {
                                               print "Committed r$_[0]\n";
                                               $cmt_rev = $_[0];
                                        },
+                                       mergeinfo => $_merge_info,
                                        svn_path => '');
                        if (!SVN::Git::Editor->new(\%ed_opts)->apply_diff) {
                                print "No changes\n$d~1 == $d\n";
@@ -532,10 +946,13 @@ sub cmd_dcommit {
                                @finish = qw/reset --mixed/;
                        }
                        command_noisy(@finish, $gs->refname);
+
+                       $rewritten_parent = command_oneline(qw/rev-parse HEAD/);
+
                        if (@diff) {
                                @refs = ();
                                my ($url_, $rev_, $uuid_, $gs_) =
-                                             working_head_info($head, \@refs);
+                                             working_head_info('HEAD', \@refs);
                                my ($linear_refs_, $parents_) =
                                              linearize_history($gs_, \@refs);
                                if (scalar(@$linear_refs) !=
@@ -553,8 +970,15 @@ sub cmd_dcommit {
                                          "\nBefore dcommitting";
                                }
                                if ($url_ ne $expect_url) {
-                                       fatal "URL mismatch after rebase: ",
-                                             "$url_ != $expect_url";
+                                       if ($url_ eq $gs->metadata_url) {
+                                               print
+                                                 "Accepting rewritten URL:",
+                                                 " $url_\n";
+                                       } else {
+                                               fatal
+                                                 "URL mismatch after rebase:",
+                                                 " $url_ != $expect_url";
+                                       }
                                }
                                if ($uuid_ ne $uuid) {
                                        fatal "uuid mismatch after rebase: ",
@@ -573,6 +997,22 @@ sub cmd_dcommit {
                        }
                }
        }
+
+       if ($old_head) {
+               my $new_head = command_oneline(qw/rev-parse HEAD/);
+               my $new_is_symbolic = eval {
+                       command_oneline(qw/symbolic-ref -q HEAD/);
+               };
+               if ($new_is_symbolic) {
+                       print "dcommitted the branch ", $head, "\n";
+               } else {
+                       print "dcommitted on a detached HEAD because you gave ",
+                             "a revision argument.\n",
+                             "The rewritten commit is: ", $new_head, "\n";
+               }
+               command(['checkout', $old_head], STDERR => 0);
+       }
+
        unlink $gs->{index};
 }
 
@@ -584,12 +1024,68 @@ sub cmd_branch {
        }
        $head ||= 'HEAD';
 
-       my ($src, $rev, undef, $gs) = working_head_info($head);
+       my (undef, $rev, undef, $gs) = working_head_info($head);
+       my $src = $gs->full_pushurl;
 
        my $remote = Git::SVN::read_all_remotes()->{$gs->{repo_id}};
-       my $glob = $remote->{ $_tag ? 'tags' : 'branches' };
+       my $allglobs = $remote->{ $_tag ? 'tags' : 'branches' };
+       my $glob;
+       if ($#{$allglobs} == 0) {
+               $glob = $allglobs->[0];
+       } else {
+               unless(defined $_branch_dest) {
+                       die "Multiple ",
+                           $_tag ? "tag" : "branch",
+                           " paths defined for Subversion repository.\n",
+                           "You must specify where you want to create the ",
+                           $_tag ? "tag" : "branch",
+                           " with the --destination argument.\n";
+               }
+               foreach my $g (@{$allglobs}) {
+                       # SVN::Git::Editor could probably be moved to Git.pm..
+                       my $re = SVN::Git::Editor::glob2pat($g->{path}->{left});
+                       if ($_branch_dest =~ /$re/) {
+                               $glob = $g;
+                               last;
+                       }
+               }
+               unless (defined $glob) {
+                       my $dest_re = qr/\b\Q$_branch_dest\E\b/;
+                       foreach my $g (@{$allglobs}) {
+                               $g->{path}->{left} =~ /$dest_re/ or next;
+                               if (defined $glob) {
+                                       die "Ambiguous destination: ",
+                                           $_branch_dest, "\nmatches both '",
+                                           $glob->{path}->{left}, "' and '",
+                                           $g->{path}->{left}, "'\n";
+                               }
+                               $glob = $g;
+                       }
+                       unless (defined $glob) {
+                               die "Unknown ",
+                                   $_tag ? "tag" : "branch",
+                                   " destination $_branch_dest\n";
+                       }
+               }
+       }
        my ($lft, $rgt) = @{ $glob->{path} }{qw/left right/};
-       my $dst = join '/', $remote->{url}, $lft, $branch_name, ($rgt || ());
+       my $url;
+       if (defined $_commit_url) {
+               $url = $_commit_url;
+       } else {
+               $url = eval { command_oneline('config', '--get',
+                       "svn-remote.$gs->{repo_id}.commiturl") };
+               if (!$url) {
+                       $url = $remote->{pushurl} || $remote->{url};
+               }
+       }
+       my $dst = join '/', $url, $lft, $branch_name, ($rgt || ());
+
+       if ($dst =~ /^https:/ && $src =~ /^http:/) {
+               $src=~s/^http:/https:/;
+       }
+
+       ::_req_svn();
 
        my $ctx = SVN::Client->new(
                auth    => Git::SVN::Ra::_auth_providers(),
@@ -634,6 +1130,15 @@ sub cmd_find_rev {
        print "$result\n" if $result;
 }
 
+sub auto_create_empty_directories {
+       my ($gs) = @_;
+       my $var = eval { command_oneline('config', '--get', '--bool',
+                                        "svn-remote.$gs->{repo_id}.automkdirs") };
+       # By default, create empty directories by consulting the unhandled log,
+       # but allow setting it to 'false' to skip it.
+       return !($var && $var eq 'false');
+}
+
 sub cmd_rebase {
        command_noisy(qw/update-index --refresh/);
        my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
@@ -657,6 +1162,9 @@ sub cmd_rebase {
                $_fetch_all ? $gs->fetch_all : $gs->fetch;
        }
        command_noisy(rebase_cmd(), $gs->refname);
+       if (auto_create_empty_directories($gs)) {
+               $gs->mkemptydirs;
+       }
 }
 
 sub cmd_show_ignore {
@@ -668,6 +1176,7 @@ sub cmd_show_ignore {
                print STDOUT "\n# $path\n";
                my $s = $props->{'svn:ignore'} or return;
                $s =~ s/[\r\n]+/\n/g;
+               $s =~ s/^\n+//;
                chomp $s;
                $s =~ s#^#$path#gm;
                print STDOUT "$s\n";
@@ -705,6 +1214,7 @@ sub cmd_create_ignore {
                open(GITIGNORE, '>', $ignore)
                  or fatal("Failed to open `$ignore' for writing: $!");
                $s =~ s/[\r\n]+/\n/g;
+               $s =~ s/^\n+//;
                chomp $s;
                # Prefix all patterns so that the ignore doesn't apply
                # to sub-directories.
@@ -716,6 +1226,12 @@ sub cmd_create_ignore {
        });
 }
 
+sub cmd_mkdirs {
+       my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
+       $gs ||= Git::SVN->new;
+       $gs->mkemptydirs($_revision);
+}
+
 sub canonicalize_path {
        my ($path) = @_;
        my $dot_slash_added = 0;
@@ -735,6 +1251,12 @@ sub canonicalize_path {
        return $path;
 }
 
+sub canonicalize_url {
+       my ($url) = @_;
+       $url =~ s#^([^:]+://[^/]*/)(.*)$#$1 . canonicalize_path($2)#e;
+       return $url;
+}
+
 # get_svnprops(PATH)
 # ------------------
 # Helper for cmd_propget and cmd_proplist below.
@@ -794,22 +1316,19 @@ sub cmd_proplist {
 
 sub cmd_multi_init {
        my $url = shift;
-       unless (defined $_trunk || defined $_branches || defined $_tags) {
+       unless (defined $_trunk || @_branches || @_tags) {
                usage(1);
        }
 
-       # there are currently some bugs that prevent multi-init/multi-fetch
-       # setups from working well without this.
-       $Git::SVN::_minimize_url = 1;
-
        $_prefix = '' unless defined $_prefix;
        if (defined $url) {
-               $url =~ s#/+$##;
+               $url = canonicalize_url($url);
                init_subdir(@_);
        }
        do_git_init_db();
        if (defined $_trunk) {
-               my $trunk_ref = $_prefix . 'trunk';
+               $_trunk =~ s#^/+##;
+               my $trunk_ref = 'refs/remotes/' . $_prefix . 'trunk';
                # try both old-style and new-style lookups:
                my $gs_trunk = eval { Git::SVN->new($trunk_ref) };
                unless ($gs_trunk) {
@@ -819,13 +1338,18 @@ sub cmd_multi_init {
                                                   undef, $trunk_ref);
                }
        }
-       return unless defined $_branches || defined $_tags;
+       return unless @_branches || @_tags;
        my $ra = $url ? Git::SVN::Ra->new($url) : undef;
-       complete_url_ls_init($ra, $_branches, '--branches/-b', $_prefix);
-       complete_url_ls_init($ra, $_tags, '--tags/-t', $_prefix . 'tags/');
+       foreach my $path (@_branches) {
+               complete_url_ls_init($ra, $path, '--branches/-b', $_prefix);
+       }
+       foreach my $path (@_tags) {
+               complete_url_ls_init($ra, $path, '--tags/-t', $_prefix.'tags/');
+       }
 }
 
 sub cmd_multi_fetch {
+       $Git::SVN::no_reuse_existing = undef;
        my $remotes = Git::SVN::read_all_remotes();
        foreach my $repo_id (sort keys %$remotes) {
                if ($remotes->{$repo_id}->{url}) {
@@ -943,6 +1467,7 @@ sub cmd_info {
        if ($@) {
                $result .= "Repository Root: (offline)\n";
        }
+       ::_req_svn();
        $result .= "Repository UUID: $uuid\n" unless $diff_status eq "A" &&
                ($SVN::Core::VERSION le '1.5.4' || $file_type ne "dir");
        $result .= "Revision: " . ($diff_status eq "A" ? 0 : $rev) . "\n";
@@ -1015,6 +1540,29 @@ sub cmd_info {
        print $result, "\n";
 }
 
+sub cmd_reset {
+       my $target = shift || $_revision or die "SVN revision required\n";
+       $target = $1 if $target =~ /^r(\d+)$/;
+       $target =~ /^\d+$/ or die "Numeric SVN revision expected\n";
+       my ($url, $rev, $uuid, $gs) = working_head_info('HEAD');
+       unless ($gs) {
+               die "Unable to determine upstream SVN information from ".
+                   "history\n";
+       }
+       my ($r, $c) = $gs->find_rev_before($target, not $_fetch_parent);
+       die "Cannot find SVN revision $target\n" unless defined($c);
+       $gs->rev_map_set($r, $c, 'reset', $uuid);
+       print "r$r = $c ($gs->{ref_id})\n";
+}
+
+sub cmd_gc {
+       if (!$can_compress) {
+               warn "Compress::Zlib could not be found; unhandled.log " .
+                    "files will not be compressed.\n";
+       }
+       find({ wanted => \&gc_directory, no_chdir => 1}, "$ENV{GIT_DIR}/svn");
+}
+
 ########################### utility functions #########################
 
 sub rebase_cmd {
@@ -1030,6 +1578,17 @@ sub post_fetch_checkout {
        my $gs = $Git::SVN::_head or return;
        return if verify_ref('refs/heads/master^0');
 
+       # look for "trunk" ref if it exists
+       my $remote = Git::SVN::read_all_remotes()->{$gs->{repo_id}};
+       my $fetch = $remote->{fetch};
+       if ($fetch) {
+               foreach my $p (keys %$fetch) {
+                       basename($fetch->{$p}) eq 'trunk' or next;
+                       $gs = Git::SVN->new($fetch->{$p}, $gs->{repo_id}, $p);
+                       last;
+               }
+       }
+
        my $valid_head = verify_ref('HEAD^0');
        command_noisy(qw(update-ref refs/heads/master), $gs->refname);
        return if ($valid_head || !verify_ref('HEAD^0'));
@@ -1043,6 +1602,9 @@ sub post_fetch_checkout {
        command_noisy(qw/read-tree -m -u -v HEAD HEAD/);
        print STDERR "Checked out HEAD:\n  ",
                     $gs->full_url, " r", $gs->last_rev, "\n";
+       if (auto_create_empty_directories($gs)) {
+               $gs->mkemptydirs($gs->last_rev);
+       }
 }
 
 sub complete_svn_url {
@@ -1084,7 +1646,8 @@ sub complete_url_ls_init {
                    "wanted to set to: $gs->{url}\n";
        }
        command_oneline('config', $k, $gs->{url}) unless $orig_url;
-       my $remote_path = "$ra->{svn_path}/$repo_path";
+       my $remote_path = "$gs->{path}/$repo_path";
+       $remote_path =~ s{%([0-9A-F]{2})}{chr hex($1)}ieg;
        $remote_path =~ s#/+#/#g;
        $remote_path =~ s#^/##g;
        $remote_path .= "/*" if $remote_path !~ /\*/;
@@ -1093,6 +1656,7 @@ sub complete_url_ls_init {
                die "--prefix='$pfx' must have a trailing slash '/'\n";
        }
        command_noisy('config',
+                     '--add',
                      "svn-remote.$gs->{repo_id}.$n",
                      "$remote_path:refs/remotes/$pfx*" .
                        ('/*' x (($remote_path =~ tr/*/*/) - 1)) );
@@ -1166,22 +1730,32 @@ sub get_commit_entry {
        close $log_fh or croak $!;
 
        if ($_edit || ($type eq 'tree')) {
-               my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi';
-               # TODO: strip out spaces, comments, like git-commit.sh
-               system($editor, $commit_editmsg);
+               chomp(my $editor = command_oneline(qw(var GIT_EDITOR)));
+               system('sh', '-c', $editor.' "$@"', $editor, $commit_editmsg);
        }
        rename $commit_editmsg, $commit_msg or croak $!;
        {
+               require Encode;
                # SVN requires messages to be UTF-8 when entering the repo
                local $/;
                open $log_fh, '<', $commit_msg or croak $!;
                binmode $log_fh;
                chomp($log_entry{log} = <$log_fh>);
 
-               if (my $enc = Git::config('i18n.commitencoding')) {
-                       require Encode;
-                       Encode::from_to($log_entry{log}, $enc, 'UTF-8');
+               my $enc = Git::config('i18n.commitencoding') || 'UTF-8';
+               my $msg = $log_entry{log};
+
+               eval { $msg = Encode::decode($enc, $msg, 1) };
+               if ($@) {
+                       die "Could not decode as $enc:\n", $msg,
+                           "\nPerhaps you need to set i18n.commitencoding\n";
                }
+
+               eval { $msg = Encode::encode('UTF-8', $msg, 1) };
+               die "Could not encode as UTF-8:\n$msg\n" if $@;
+
+               $log_entry{log} = $msg;
+
                close $log_fh or croak $!;
        }
        unlink $commit_msg;
@@ -1224,8 +1798,7 @@ sub load_authors {
 }
 
 # convert GetOpt::Long specs for use by git-config
-sub read_repo_config {
-       return unless -d $ENV{GIT_DIR};
+sub read_git_config {
        my $opts = shift;
        my @config_only;
        foreach my $o (keys %$opts) {
@@ -1255,11 +1828,11 @@ sub read_repo_config {
 sub extract_metadata {
        my $id = shift or return (undef, undef, undef);
        my ($url, $rev, $uuid) = ($id =~ /^\s*git-svn-id:\s+(.*)\@(\d+)
-                                                       \s([a-f\d\-]+)$/x);
+                                                       \s([a-f\d\-]+)$/ix);
        if (!defined $rev || !$uuid || !$url) {
                # some of the original repositories I made had
                # identifiers like this:
-               ($rev, $uuid) = ($id =~/^\s*git-svn-id:\s(\d+)\@([a-f\d\-]+)/);
+               ($rev, $uuid) = ($id =~/^\s*git-svn-id:\s(\d+)\@([a-f\d\-]+)/i);
        }
        return ($url, $rev, $uuid);
 }
@@ -1305,7 +1878,8 @@ sub cmt_sha2rev_batch {
 
 sub working_head_info {
        my ($head, $refs) = @_;
-       my @args = ('log', '--no-color', '--first-parent', '--pretty=medium');
+       my @args = qw/log --no-color --no-decorate --first-parent
+                     --pretty=medium/;
        my ($fh, $ctx) = command_output_pipe(@args, $head);
        my $hash;
        my %max;
@@ -1423,6 +1997,25 @@ sub md5sum {
        return $md5->hexdigest();
 }
 
+sub gc_directory {
+       if ($can_compress && -f $_ && basename($_) eq "unhandled.log") {
+               my $out_filename = $_ . ".gz";
+               open my $in_fh, "<", $_ or die "Unable to open $_: $!\n";
+               binmode $in_fh;
+               my $gz = Compress::Zlib::gzopen($out_filename, "ab") or
+                               die "Unable to open $out_filename: $!\n";
+
+               my $res;
+               while ($res = sysread($in_fh, my $str, 1024)) {
+                       $gz->gzwrite($str) or
+                               die "Unable to write: ".$gz->gzerror()."!\n";
+               }
+               unlink $_ or die "unlink $File::Find::name: $!\n";
+       } elsif (-f $_ && basename($_) eq "index") {
+               unlink $_ or die "unlink $_: $!\n";
+       }
+}
+
 package Git::SVN;
 use strict;
 use warnings;
@@ -1436,6 +2029,8 @@ package Git::SVN;
 use File::Path qw/mkpath/;
 use File::Copy qw/copy/;
 use IPC::Open3;
+use Memoize;  # core since 5.8.0, Jul 2002
+use Memoize::Storable;
 
 my ($_gc_nr, $_gc_period);
 
@@ -1486,23 +2081,23 @@ sub resolve_local_globs {
        return unless defined $glob_spec;
        my $ref = $glob_spec->{ref};
        my $path = $glob_spec->{path};
-       foreach (command(qw#for-each-ref --format=%(refname) refs/remotes#)) {
-               next unless m#^refs/remotes/$ref->{regex}$#;
+       foreach (command(qw#for-each-ref --format=%(refname) refs/#)) {
+               next unless m#^$ref->{regex}$#;
                my $p = $1;
                my $pathname = desanitize_refname($path->full_path($p));
                my $refname = desanitize_refname($ref->full_path($p));
                if (my $existing = $fetch->{$pathname}) {
                        if ($existing ne $refname) {
                                die "Refspec conflict:\n",
-                                   "existing: refs/remotes/$existing\n",
-                                   " globbed: refs/remotes/$refname\n";
+                                   "existing: $existing\n",
+                                   " globbed: $refname\n";
                        }
-                       my $u = (::cmt_metadata("refs/remotes/$refname"))[0];
+                       my $u = (::cmt_metadata("$refname"))[0];
                        $u =~ s!^\Q$url\E(/|$)!! or die
-                         "refs/remotes/$refname: '$url' not found in '$u'\n";
+                         "$refname: '$url' not found in '$u'\n";
                        if ($pathname ne $u) {
                                warn "W: Refspec glob conflict ",
-                                    "(ref: refs/remotes/$refname):\n",
+                                    "(ref: $refname):\n",
                                     "expected path: $pathname\n",
                                     "    real path: $u\n",
                                     "Continuing ahead with $u\n";
@@ -1543,12 +2138,18 @@ sub fetch_all {
        my $ra = Git::SVN::Ra->new($url);
        my $uuid = $ra->get_uuid;
        my $head = $ra->get_latest_revnum;
+
+       # ignore errors, $head revision may not even exist anymore
+       eval { $ra->get_log("", $head, 0, 1, 0, 1, sub { $head = $_[1] }) };
+       warn "W: $@\n" if $@;
+
        my $base = defined $fetch ? $head : 0;
 
        # read the max revs for wildcard expansion (branches/*, tags/*)
        foreach my $t (qw/branches tags/) {
                defined $remote->{$t} or next;
-               push @globs, $remote->{$t};
+               push @globs, @{$remote->{$t}};
+
                my $max_rev = eval { tmp_config(qw/--int --get/,
                                         "svn-remote.$repo_id.${t}-maxRev") };
                if (defined $max_rev && ($max_rev < $base)) {
@@ -1578,32 +2179,41 @@ sub read_all_remotes {
        my $use_svm_props = eval { command_oneline(qw/config --bool
            svn.useSvmProps/) };
        $use_svm_props = $use_svm_props eq 'true' if $use_svm_props;
+       my $svn_refspec = qr{\s*(.*?)\s*:\s*(.+?)\s*};
        foreach (grep { s/^svn-remote\.// } command(qw/config -l/)) {
-               if (m!^(.+)\.fetch=\s*(.*)\s*:\s*(.+)\s*$!) {
-                       my ($remote, $local_ref, $_remote_ref) = ($1, $2, $3);
-                       die("svn-remote.$remote: remote ref '$_remote_ref' "
-                           . "must start with 'refs/remotes/'\n")
-                               unless $_remote_ref =~ m{^refs/remotes/(.+)};
-                       my $remote_ref = $1;
-                       $local_ref =~ s{^/}{};
+               if (m!^(.+)\.fetch=$svn_refspec$!) {
+                       my ($remote, $local_ref, $remote_ref) = ($1, $2, $3);
+                       die("svn-remote.$remote: remote ref '$remote_ref' "
+                           . "must start with 'refs/'\n")
+                               unless $remote_ref =~ m{^refs/};
+                       $local_ref = uri_decode($local_ref);
                        $r->{$remote}->{fetch}->{$local_ref} = $remote_ref;
                        $r->{$remote}->{svm} = {} if $use_svm_props;
                } elsif (m!^(.+)\.usesvmprops=\s*(.*)\s*$!) {
                        $r->{$1}->{svm} = {};
                } elsif (m!^(.+)\.url=\s*(.*)\s*$!) {
                        $r->{$1}->{url} = $2;
-               } elsif (m!^(.+)\.(branches|tags)=
-                          (.*):refs/remotes/(.+)\s*$/!x) {
-                       my ($p, $g) = ($3, $4);
-                       my $rs = $r->{$1}->{$2} = {
-                                         t => $2,
-                                         remote => $1,
-                                         path => Git::SVN::GlobSpec->new($p),
-                                         ref => Git::SVN::GlobSpec->new($g) };
+               } elsif (m!^(.+)\.pushurl=\s*(.*)\s*$!) {
+                       $r->{$1}->{pushurl} = $2;
+               } elsif (m!^(.+)\.ignore-refs=\s*(.*)\s*$!) {
+                       $r->{$1}->{ignore_refs_regex} = $2;
+               } elsif (m!^(.+)\.(branches|tags)=$svn_refspec$!) {
+                       my ($remote, $t, $local_ref, $remote_ref) =
+                                                            ($1, $2, $3, $4);
+                       die("svn-remote.$remote: remote ref '$remote_ref' ($t) "
+                           . "must start with 'refs/'\n")
+                               unless $remote_ref =~ m{^refs/};
+                       $local_ref = uri_decode($local_ref);
+                       my $rs = {
+                           t => $t,
+                           remote => $remote,
+                           path => Git::SVN::GlobSpec->new($local_ref, 1),
+                           ref => Git::SVN::GlobSpec->new($remote_ref, 0) };
                        if (length($rs->{ref}->{right}) != 0) {
                                die "The '*' glob character must be the last ",
-                                   "character of '$g'\n";
+                                   "character of '$remote_ref'\n";
                        }
+                       push @{ $r->{$remote}->{$t} }, $rs;
                }
        }
 
@@ -1623,6 +2233,16 @@ sub read_all_remotes {
                }
        } keys %$r;
 
+       foreach my $remote (keys %$r) {
+               foreach ( grep { defined $_ }
+                         map { $r->{$remote}->{$_} } qw(branches tags) ) {
+                       foreach my $rs ( @$_ ) {
+                               $rs->{ignore_refs_regex} =
+                                   $r->{$remote}->{ignore_refs_regex};
+                       }
+               }
+       }
+
        $r;
 }
 
@@ -1711,14 +2331,15 @@ sub init_remote_config {
                }
        }
        my ($xrepo_id, $xpath) = find_ref($self->refname);
-       if (defined $xpath) {
+       if (!$no_write && defined $xpath) {
                die "svn-remote.$xrepo_id.fetch already set to track ",
-                   "$xpath:refs/remotes/", $self->refname, "\n";
+                   "$xpath:", $self->refname, "\n";
        }
        unless ($no_write) {
                command_noisy('config',
                              "svn-remote.$self->{repo_id}.url", $url);
                $self->{path} =~ s{^/}{};
+               $self->{path} =~ s{%([0-9A-F]{2})}{chr hex($1)}ieg;
                command_noisy('config', '--add',
                              "svn-remote.$self->{repo_id}.fetch",
                              "$self->{path}:".$self->refname);
@@ -1743,9 +2364,10 @@ sub find_by_url { # repos_root and, path are optional
                next if defined $repos_root && $repos_root ne $u;
 
                my $fetch = $remotes->{$repo_id}->{fetch} || {};
-               foreach (qw/branches tags/) {
-                       resolve_local_globs($u, $fetch,
-                                           $remotes->{$repo_id}->{$_});
+               foreach my $t (qw/branches tags/) {
+                       foreach my $globspec (@{$remotes->{$repo_id}->{$t}}) {
+                               resolve_local_globs($u, $fetch, $globspec);
+                       }
                }
                my $p = $path;
                my $rwr = rewrite_root({repo_id => $repo_id});
@@ -1787,7 +2409,7 @@ sub find_ref {
        my ($ref_id) = @_;
        foreach (command(qw/config -l/)) {
                next unless m!^svn-remote\.(.+)\.fetch=
-                             \s*(.*)\s*:\s*refs/remotes/(.+)\s*$!x;
+                             \s*(.*?)\s*:\s*(.+?)\s*$!x;
                my ($repo_id, $path, $ref) = ($1, $2, $3);
                if ($ref eq $ref_id) {
                        $path = '' if ($path =~ m#^\./?#);
@@ -1804,27 +2426,32 @@ sub new {
                if (!defined $repo_id) {
                        die "Could not find a \"svn-remote.*.fetch\" key ",
                            "in the repository configuration matching: ",
-                           "refs/remotes/$ref_id\n";
+                           "$ref_id\n";
                }
        }
        my $self = _new($class, $repo_id, $ref_id, $path);
        if (!defined $self->{path} || !length $self->{path}) {
                my $fetch = command_oneline('config', '--get',
                                            "svn-remote.$repo_id.fetch",
-                                           ":refs/remotes/$ref_id\$") or
+                                           ":$ref_id\$") or
                     die "Failed to read \"svn-remote.$repo_id.fetch\" ",
-                        "\":refs/remotes/$ref_id\$\" in config\n";
+                        "\":$ref_id\$\" in config\n";
                ($self->{path}, undef) = split(/\s*:\s*/, $fetch);
        }
+       $self->{path} =~ s{/+}{/}g;
+       $self->{path} =~ s{\A/}{};
+       $self->{path} =~ s{/\z}{};
        $self->{url} = command_oneline('config', '--get',
                                       "svn-remote.$repo_id.url") or
                   die "Failed to read \"svn-remote.$repo_id.url\" in config\n";
+       $self->{pushurl} = eval { command_oneline('config', '--get',
+                                 "svn-remote.$repo_id.pushurl") };
        $self->rebuild;
        $self;
 }
 
 sub refname {
-       my ($refname) = "refs/remotes/$_[0]->{ref_id}" ;
+       my ($refname) = $_[0]->{ref_id} ;
 
        # It cannot end with a slash /, we'll throw up on this because
        # SVN can't have directories with a slash in their name, either:
@@ -1849,6 +2476,14 @@ sub refname {
        # .. becomes %2E%2E
        $refname =~ s{\.\.}{%2E%2E}g;
 
+       # trailing dots and .lock are not allowed
+       # .$ becomes %2E and .lock becomes %2Elock
+       $refname =~ s{\.(?=$|lock$)}{%2E};
+
+       # the sequence @{ is used to access the reflog
+       # @{ becomes %40{
+       $refname =~ s{\@\{}{%40\{}g;
+
        return $refname;
 }
 
@@ -1903,7 +2538,7 @@ sub _set_svm_vars {
 
                chomp($src, $uuid);
 
-               $uuid =~ m{^[0-9a-f\-]{30,}$}
+               $uuid =~ m{^[0-9a-f\-]{30,}$}i
                    or die "doesn't look right - svm:uuid is '$uuid'\n";
 
                # the '!' is used to mark the repos_root!/relative/path
@@ -1978,6 +2613,10 @@ sub svnsync {
                die "Can't have both 'useSvnsyncProps' and 'rewriteRoot' ",
                    "options set!\n";
        }
+       if ($self->rewrite_uuid) {
+               die "Can't have both 'useSvnsyncProps' and 'rewriteUUID' ",
+                   "options set!\n";
+       }
 
        my $svnsync;
        # see if we have it in our config, first:
@@ -1989,7 +2628,7 @@ sub svnsync {
                   die "doesn't look right - svn:sync-from-url is '$url'\n";
 
                my $uuid = tmp_config('--get', "$section.svnsync-uuid");
-               ($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}) or
+               ($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}i) or
                   die "doesn't look right - svn:sync-from-uuid is '$uuid'\n";
 
                $svnsync = { url => $url, uuid => $uuid }
@@ -2007,7 +2646,7 @@ sub svnsync {
                   die "doesn't look right - svn:sync-from-url is '$url'\n";
 
        my $uuid = $rp->{'svn:sync-from-uuid'} or die $err . "uuid\n";
-       ($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}) or
+       ($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}i) or
                   die "doesn't look right - svn:sync-from-uuid is '$uuid'\n";
 
        my $section = "svn-remote.$self->{repo_id}";
@@ -2023,7 +2662,7 @@ sub ra_uuid {
        unless ($self->{ra_uuid}) {
                my $key = "svn-remote.$self->{repo_id}.uuid";
                my $uuid = eval { tmp_config('--get', $key) };
-               if (!$@ && $uuid && $uuid =~ /^([a-f\d\-]{30,})$/) {
+               if (!$@ && $uuid && $uuid =~ /^([a-f\d\-]{30,})$/i) {
                        $self->{ra_uuid} = $uuid;
                } else {
                        die "ra_uuid called without URL\n" unless $self->{url};
@@ -2066,16 +2705,6 @@ sub ra {
        $ra;
 }
 
-sub rel_path {
-       my ($self) = @_;
-       my $repos_root = $self->ra->{repos_root};
-       return $self->{path} if ($self->{url} eq $repos_root);
-       my $url = $self->{url} .
-                 (length $self->{path} ? "/$self->{path}" : $self->{path});
-       $url =~ s!^\Q$repos_root\E(?:/+|$)!!g;
-       $url;
-}
-
 # prop_walk(PATH, REV, SUB)
 # -------------------------
 # Recursively traverse PATH at revision REV and invoke SUB for each
@@ -2251,12 +2880,6 @@ sub get_commit_parents {
                next if $seen{$p};
                $seen{$p} = 1;
                push @ret, $p;
-               # MAXPARENT is defined to 16 in commit-tree.c:
-               last if @ret >= 16;
-       }
-       if (@tmp) {
-               die "r$log_entry->{revision}: No room for parents:\n\t",
-                   join("\n\t", @tmp), "\n";
        }
        @ret;
 }
@@ -2275,6 +2898,20 @@ sub rewrite_root {
        $self->{-rewrite_root} = $rwr;
 }
 
+sub rewrite_uuid {
+       my ($self) = @_;
+       return $self->{-rewrite_uuid} if exists $self->{-rewrite_uuid};
+       my $k = "svn-remote.$self->{repo_id}.rewriteUUID";
+       my $rwid = eval { command_oneline(qw/config --get/, $k) };
+       if ($rwid) {
+               $rwid =~ s#/+$##;
+               if ($rwid !~ m#^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}$#) {
+                       die "$rwid is not a valid UUID (key: $k)\n";
+               }
+       }
+       $self->{-rewrite_uuid} = $rwid;
+}
+
 sub metadata_url {
        my ($self) = @_;
        ($self->rewrite_root || $self->{url}) .
@@ -2286,6 +2923,15 @@ sub full_url {
        $self->{url} . (length $self->{path} ? '/' . $self->{path} : '');
 }
 
+sub full_pushurl {
+       my ($self) = @_;
+       if ($self->{pushurl}) {
+               return $self->{pushurl} . (length $self->{path} ? '/' .
+                      $self->{path} : '');
+       } else {
+               return $self->full_url;
+       }
+}
 
 sub set_commit_header_env {
        my ($log_entry) = @_;
@@ -2401,10 +3047,7 @@ sub match_paths {
        if (my $path = $paths->{"/$self->{path}"}) {
                return ($path->{action} eq 'D') ? 0 : 1;
        }
-       my $repos_root = $self->ra->{repos_root};
-       my $extended_path = $self->{url} . '/' . $self->{path};
-       $extended_path =~ s#^\Q$repos_root\E(/|$)##;
-       $self->{path_regex} ||= qr/^\/\Q$extended_path\E\//;
+       $self->{path_regex} ||= qr/^\/\Q$self->{path}\E\//;
        if (grep /$self->{path_regex}/, keys %$paths) {
                return 1;
        }
@@ -2427,15 +3070,14 @@ sub find_parent_branch {
        unless (defined $paths) {
                my $err_handler = $SVN::Error::handler;
                $SVN::Error::handler = \&Git::SVN::Ra::skip_unknown_revs;
-               $self->ra->get_log([$self->{path}], $rev, $rev, 0, 1, 1, sub {
-                                  $paths =
-                                     Git::SVN::Ra::dup_changed_paths($_[0]) });
+               $self->ra->get_log([$self->{path}], $rev, $rev, 0, 1, 1,
+                                  sub { $paths = $_[0] });
                $SVN::Error::handler = $err_handler;
        }
        return undef unless defined $paths;
 
        # look for a parent from another branch:
-       my @b_path_components = split m#/#, $self->rel_path;
+       my @b_path_components = split m#/#, $self->{path};
        my @a_path_components;
        my $i;
        while (@b_path_components) {
@@ -2453,11 +3095,12 @@ sub find_parent_branch {
        my $r = $i->{copyfrom_rev};
        my $repos_root = $self->ra->{repos_root};
        my $url = $self->ra->{url};
-       my $new_url = $repos_root . $branch_from;
+       my $new_url = $url . $branch_from;
        print STDERR  "Found possible branch point: ",
-                     "$new_url => ", $self->full_url, ", $r\n";
+                     "$new_url => ", $self->full_url, ", $r\n"
+                     unless $::_q > 1;
        $branch_from =~ s#^/##;
-       my $gs = $self->other_gs($new_url, $url, $repos_root,
+       my $gs = $self->other_gs($new_url, $url,
                                 $branch_from, $r, $self->{ref_id});
        my ($r0, $parent) = $gs->find_rev_before($r, 1);
        {
@@ -2476,11 +3119,13 @@ sub find_parent_branch {
                ($r0, $parent) = $gs->find_rev_before($r, 1);
        }
        if (defined $r0 && defined $parent) {
-               print STDERR "Found branch parent: ($self->{ref_id}) $parent\n";
+               print STDERR "Found branch parent: ($self->{ref_id}) $parent\n"
+                            unless $::_q > 1;
                my $ed;
                if ($self->ra->can_do_switch) {
                        $self->assert_index_clean($parent);
-                       print STDERR "Following parent with do_switch\n";
+                       print STDERR "Following parent with do_switch\n"
+                                    unless $::_q > 1;
                        # do_switch works with svn/trunk >= r22312, but that
                        # is not included with SVN 1.4.3 (the latest version
                        # at the moment), so we can't rely on it
@@ -2495,18 +3140,20 @@ sub find_parent_branch {
                        print STDERR "Trees match:\n",
                                     "  $new_url\@$r0\n",
                                     "  ${\$self->full_url}\@$rev\n",
-                                    "Following parent with no changes\n";
+                                    "Following parent with no changes\n"
+                                    unless $::_q > 1;
                        $self->tmp_index_do(sub {
                            command_noisy('read-tree', $parent);
                        });
                        $self->{last_commit} = $parent;
                } else {
-                       print STDERR "Following parent with do_update\n";
+                       print STDERR "Following parent with do_update\n"
+                                    unless $::_q > 1;
                        $ed = SVN::Git::Fetcher->new($self);
                        $self->ra->gs_do_update($rev, $rev, $self, $ed)
                          or die "SVN connection failed somewhere...\n";
                }
-               print STDERR "Successfully followed parent\n";
+               print STDERR "Successfully followed parent\n" unless $::_q > 1;
                return $self->make_log_entry($rev, [$parent], $ed);
        }
        return undef;
@@ -2542,6 +3189,62 @@ sub do_fetch {
        $self->make_log_entry($rev, \@parents, $ed);
 }
 
+sub mkemptydirs {
+       my ($self, $r) = @_;
+
+       sub scan {
+               my ($r, $empty_dirs, $line) = @_;
+               if (defined $r && $line =~ /^r(\d+)$/) {
+                       return 0 if $1 > $r;
+               } elsif ($line =~ /^  \+empty_dir: (.+)$/) {
+                       $empty_dirs->{$1} = 1;
+               } elsif ($line =~ /^  \-empty_dir: (.+)$/) {
+                       my @d = grep {m[^\Q$1\E(/|$)]} (keys %$empty_dirs);
+                       delete @$empty_dirs{@d};
+               }
+               1; # continue
+       };
+
+       my %empty_dirs = ();
+       my $gz_file = "$self->{dir}/unhandled.log.gz";
+       if (-f $gz_file) {
+               if (!$can_compress) {
+                       warn "Compress::Zlib could not be found; ",
+                            "empty directories in $gz_file will not be read\n";
+               } else {
+                       my $gz = Compress::Zlib::gzopen($gz_file, "rb") or
+                               die "Unable to open $gz_file: $!\n";
+                       my $line;
+                       while ($gz->gzreadline($line) > 0) {
+                               scan($r, \%empty_dirs, $line) or last;
+                       }
+                       $gz->gzclose;
+               }
+       }
+
+       if (open my $fh, '<', "$self->{dir}/unhandled.log") {
+               binmode $fh or croak "binmode: $!";
+               while (<$fh>) {
+                       scan($r, \%empty_dirs, $_) or last;
+               }
+               close $fh;
+       }
+
+       my $strip = qr/\A\Q$self->{path}\E(?:\/|$)/;
+       foreach my $d (sort keys %empty_dirs) {
+               $d = uri_decode($d);
+               $d =~ s/$strip//;
+               next unless length($d);
+               next if -d $d;
+               if (-e $d) {
+                       warn "$d exists but is not a directory\n";
+               } else {
+                       print "creating empty directory: $d\n";
+                       mkpath([$d]);
+               }
+       }
+}
+
 sub get_untracked {
        my ($self, $ed) = @_;
        my @out;
@@ -2642,45 +3345,414 @@ sub parse_svn_date {
 }
 
 sub other_gs {
-       my ($self, $new_url, $url, $repos_root,
+       my ($self, $new_url, $url,
            $branch_from, $r, $old_ref_id) = @_;
-       my $gs = Git::SVN->find_by_url($new_url, $repos_root, $branch_from);
+       my $gs = Git::SVN->find_by_url($new_url, $url, $branch_from);
        unless ($gs) {
                my $ref_id = $old_ref_id;
-               $ref_id =~ s/\@\d+$//;
+               $ref_id =~ s/\@\d+-*$//;
                $ref_id .= "\@$r";
                # just grow a tail if we're not unique enough :x
                $ref_id .= '-' while find_ref($ref_id);
-               print STDERR "Initializing parent: $ref_id\n";
                my ($u, $p, $repo_id) = ($new_url, '', $ref_id);
                if ($u =~ s#^\Q$url\E(/|$)##) {
                        $p = $u;
                        $u = $url;
                        $repo_id = $self->{repo_id};
                }
-               $gs = Git::SVN->init($u, $p, $repo_id, $ref_id, 1);
+               while (1) {
+                       # It is possible to tag two different subdirectories at
+                       # the same revision.  If the url for an existing ref
+                       # does not match, we must either find a ref with a
+                       # matching url or create a new ref by growing a tail.
+                       $gs = Git::SVN->init($u, $p, $repo_id, $ref_id, 1);
+                       my (undef, $max_commit) = $gs->rev_map_max(1);
+                       last if (!$max_commit);
+                       my ($url) = ::cmt_metadata($max_commit);
+                       last if ($url eq $gs->metadata_url);
+                       $ref_id .= '-';
+               }
+               print STDERR "Initializing parent: $ref_id\n" unless $::_q > 1;
        }
        $gs
 }
 
+sub call_authors_prog {
+       my ($orig_author) = @_;
+       $orig_author = command_oneline('rev-parse', '--sq-quote', $orig_author);
+       my $author = `$::_authors_prog $orig_author`;
+       if ($? != 0) {
+               die "$::_authors_prog failed with exit code $?\n"
+       }
+       if ($author =~ /^\s*(.+?)\s*<(.*)>\s*$/) {
+               my ($name, $email) = ($1, $2);
+               $email = undef if length $2 == 0;
+               return [$name, $email];
+       } else {
+               die "Author: $orig_author: $::_authors_prog returned "
+                       . "invalid author format: $author\n";
+       }
+}
+
 sub check_author {
        my ($author) = @_;
        if (!defined $author || length $author == 0) {
                $author = '(no author)';
-       } elsif (defined $::_authors && ! defined $::users{$author}) {
-               die "Author: $author not defined in $::_authors file\n";
+       }
+       if (!defined $::users{$author}) {
+               if (defined $::_authors_prog) {
+                       $::users{$author} = call_authors_prog($author);
+               } elsif (defined $::_authors) {
+                       die "Author: $author not defined in $::_authors file\n";
+               }
        }
        $author;
 }
 
+sub find_extra_svk_parents {
+       my ($self, $ed, $tickets, $parents) = @_;
+       # aha!  svk:merge property changed...
+       my @tickets = split "\n", $tickets;
+       my @known_parents;
+       for my $ticket ( @tickets ) {
+               my ($uuid, $path, $rev) = split /:/, $ticket;
+               if ( $uuid eq $self->ra_uuid ) {
+                       my $url = $self->{url};
+                       my $repos_root = $url;
+                       my $branch_from = $path;
+                       $branch_from =~ s{^/}{};
+                       my $gs = $self->other_gs($repos_root."/".$branch_from,
+                                                $url,
+                                                $branch_from,
+                                                $rev,
+                                                $self->{ref_id});
+                       if ( my $commit = $gs->rev_map_get($rev, $uuid) ) {
+                               # wahey!  we found it, but it might be
+                               # an old one (!)
+                               push @known_parents, [ $rev, $commit ];
+                       }
+               }
+       }
+       # Ordering matters; highest-numbered commit merge tickets
+       # first, as they may account for later merge ticket additions
+       # or changes.
+       @known_parents = map {$_->[1]} sort {$b->[0] <=> $a->[0]} @known_parents;
+       for my $parent ( @known_parents ) {
+               my @cmd = ('rev-list', $parent, map { "^$_" } @$parents );
+               my ($msg_fh, $ctx) = command_output_pipe(@cmd);
+               my $new;
+               while ( <$msg_fh> ) {
+                       $new=1;last;
+               }
+               command_close_pipe($msg_fh, $ctx);
+               if ( $new ) {
+                       print STDERR
+                           "Found merge parent (svk:merge ticket): $parent\n";
+                       push @$parents, $parent;
+               }
+       }
+}
+
+sub lookup_svn_merge {
+       my $uuid = shift;
+       my $url = shift;
+       my $merge = shift;
+
+       my ($source, $revs) = split ":", $merge;
+       my $path = $source;
+       $path =~ s{^/}{};
+       my $gs = Git::SVN->find_by_url($url.$source, $url, $path);
+       if ( !$gs ) {
+               warn "Couldn't find revmap for $url$source\n";
+               return;
+       }
+       my @ranges = split ",", $revs;
+       my ($tip, $tip_commit);
+       my @merged_commit_ranges;
+       # find the tip
+       for my $range ( @ranges ) {
+               my ($bottom, $top) = split "-", $range;
+               $top ||= $bottom;
+               my $bottom_commit = $gs->find_rev_after( $bottom, 1, $top );
+               my $top_commit = $gs->find_rev_before( $top, 1, $bottom );
+
+               unless ($top_commit and $bottom_commit) {
+                       warn "W:unknown path/rev in svn:mergeinfo "
+                               ."dirprop: $source:$range\n";
+                       next;
+               }
+
+               if (scalar(command('rev-parse', "$bottom_commit^@"))) {
+                       push @merged_commit_ranges,
+                            "$bottom_commit^..$top_commit";
+               } else {
+                       push @merged_commit_ranges, "$top_commit";
+               }
+
+               if ( !defined $tip or $top > $tip ) {
+                       $tip = $top;
+                       $tip_commit = $top_commit;
+               }
+       }
+       return ($tip_commit, @merged_commit_ranges);
+}
+
+sub _rev_list {
+       my ($msg_fh, $ctx) = command_output_pipe(
+               "rev-list", @_,
+              );
+       my @rv;
+       while ( <$msg_fh> ) {
+               chomp;
+               push @rv, $_;
+       }
+       command_close_pipe($msg_fh, $ctx);
+       @rv;
+}
+
+sub check_cherry_pick {
+       my $base = shift;
+       my $tip = shift;
+       my $parents = shift;
+       my @ranges = @_;
+       my %commits = map { $_ => 1 }
+               _rev_list("--no-merges", $tip, "--not", $base, @$parents, "--");
+       for my $range ( @ranges ) {
+               delete @commits{_rev_list($range, "--")};
+       }
+       for my $commit (keys %commits) {
+               if (has_no_changes($commit)) {
+                       delete $commits{$commit};
+               }
+       }
+       return (keys %commits);
+}
+
+sub has_no_changes {
+       my $commit = shift;
+
+       my @revs = split / /, command_oneline(
+               qw(rev-list --parents -1 -m), $commit);
+
+       # Commits with no parents, e.g. the start of a partial branch,
+       # have changes by definition.
+       return 1 if (@revs < 2);
+
+       # Commits with multiple parents, e.g a merge, have no changes
+       # by definition.
+       return 0 if (@revs > 2);
+
+       return (command_oneline("rev-parse", "$commit^{tree}") eq
+               command_oneline("rev-parse", "$commit~1^{tree}"));
+}
+
+# The GIT_DIR environment variable is not always set until after the command
+# line arguments are processed, so we can't memoize in a BEGIN block.
+{
+       my $memoized = 0;
+
+       sub memoize_svn_mergeinfo_functions {
+               return if $memoized;
+               $memoized = 1;
+
+               my $cache_path = "$ENV{GIT_DIR}/svn/.caches/";
+               mkpath([$cache_path]) unless -d $cache_path;
+
+               tie my %lookup_svn_merge_cache => 'Memoize::Storable',
+                   "$cache_path/lookup_svn_merge.db", 'nstore';
+               memoize 'lookup_svn_merge',
+                       SCALAR_CACHE => 'FAULT',
+                       LIST_CACHE => ['HASH' => \%lookup_svn_merge_cache],
+               ;
+
+               tie my %check_cherry_pick_cache => 'Memoize::Storable',
+                   "$cache_path/check_cherry_pick.db", 'nstore';
+               memoize 'check_cherry_pick',
+                       SCALAR_CACHE => 'FAULT',
+                       LIST_CACHE => ['HASH' => \%check_cherry_pick_cache],
+               ;
+
+               tie my %has_no_changes_cache => 'Memoize::Storable',
+                   "$cache_path/has_no_changes.db", 'nstore';
+               memoize 'has_no_changes',
+                       SCALAR_CACHE => ['HASH' => \%has_no_changes_cache],
+                       LIST_CACHE => 'FAULT',
+               ;
+       }
+
+       sub unmemoize_svn_mergeinfo_functions {
+               return if not $memoized;
+               $memoized = 0;
+
+               Memoize::unmemoize 'lookup_svn_merge';
+               Memoize::unmemoize 'check_cherry_pick';
+               Memoize::unmemoize 'has_no_changes';
+       }
+
+       Memoize::memoize 'Git::SVN::repos_root';
+}
+
+END {
+       # Force cache writeout explicitly instead of waiting for
+       # global destruction to avoid segfault in Storable:
+       # http://rt.cpan.org/Public/Bug/Display.html?id=36087
+       unmemoize_svn_mergeinfo_functions();
+}
+
+sub parents_exclude {
+       my $parents = shift;
+       my @commits = @_;
+       return unless @commits;
+
+       my @excluded;
+       my $excluded;
+       do {
+               my @cmd = ('rev-list', "-1", @commits, "--not", @$parents );
+               $excluded = command_oneline(@cmd);
+               if ( $excluded ) {
+                       my @new;
+                       my $found;
+                       for my $commit ( @commits ) {
+                               if ( $commit eq $excluded ) {
+                                       push @excluded, $commit;
+                                       $found++;
+                                       last;
+                               }
+                               else {
+                                       push @new, $commit;
+                               }
+                       }
+                       die "saw commit '$excluded' in rev-list output, "
+                               ."but we didn't ask for that commit (wanted: @commits --not @$parents)"
+                                       unless $found;
+                       @commits = @new;
+               }
+       }
+               while ($excluded and @commits);
+
+       return @excluded;
+}
+
+
+# note: this function should only be called if the various dirprops
+# have actually changed
+sub find_extra_svn_parents {
+       my ($self, $ed, $mergeinfo, $parents) = @_;
+       # aha!  svk:merge property changed...
+
+       memoize_svn_mergeinfo_functions();
+
+       # We first search for merged tips which are not in our
+       # history.  Then, we figure out which git revisions are in
+       # that tip, but not this revision.  If all of those revisions
+       # are now marked as merge, we can add the tip as a parent.
+       my @merges = split "\n", $mergeinfo;
+       my @merge_tips;
+       my $url = $self->{url};
+       my $uuid = $self->ra_uuid;
+       my %ranges;
+       for my $merge ( @merges ) {
+               my ($tip_commit, @ranges) =
+                       lookup_svn_merge( $uuid, $url, $merge );
+               unless (!$tip_commit or
+                               grep { $_ eq $tip_commit } @$parents ) {
+                       push @merge_tips, $tip_commit;
+                       $ranges{$tip_commit} = \@ranges;
+               } else {
+                       push @merge_tips, undef;
+               }
+       }
+
+       my %excluded = map { $_ => 1 }
+               parents_exclude($parents, grep { defined } @merge_tips);
+
+       # check merge tips for new parents
+       my @new_parents;
+       for my $merge_tip ( @merge_tips ) {
+               my $spec = shift @merges;
+               next unless $merge_tip and $excluded{$merge_tip};
+
+               my $ranges = $ranges{$merge_tip};
+
+               # check out 'new' tips
+               my $merge_base;
+               eval {
+                       $merge_base = command_oneline(
+                               "merge-base",
+                               @$parents, $merge_tip,
+                       );
+               };
+               if ($@) {
+                       die "An error occurred during merge-base"
+                               unless $@->isa("Git::Error::Command");
+
+                       warn "W: Cannot find common ancestor between ".
+                            "@$parents and $merge_tip. Ignoring merge info.\n";
+                       next;
+               }
+
+               # double check that there are no missing non-merge commits
+               my (@incomplete) = check_cherry_pick(
+                       $merge_base, $merge_tip,
+                       $parents,
+                       @$ranges,
+                      );
+
+               if ( @incomplete ) {
+                       warn "W:svn cherry-pick ignored ($spec) - missing "
+                               .@incomplete." commit(s) (eg $incomplete[0])\n";
+               } else {
+                       warn
+                               "Found merge parent (svn:mergeinfo prop): ",
+                                       $merge_tip, "\n";
+                       push @new_parents, $merge_tip;
+               }
+       }
+
+       # cater for merges which merge commits from multiple branches
+       if ( @new_parents > 1 ) {
+               for ( my $i = 0; $i <= $#new_parents; $i++ ) {
+                       for ( my $j = 0; $j <= $#new_parents; $j++ ) {
+                               next if $i == $j;
+                               next unless $new_parents[$i];
+                               next unless $new_parents[$j];
+                               my $revs = command_oneline(
+                                       "rev-list", "-1",
+                                       "$new_parents[$i]..$new_parents[$j]",
+                                      );
+                               if ( !$revs ) {
+                                       undef($new_parents[$j]);
+                               }
+                       }
+               }
+       }
+       push @$parents, grep { defined } @new_parents;
+}
+
 sub make_log_entry {
        my ($self, $rev, $parents, $ed) = @_;
        my $untracked = $self->get_untracked($ed);
 
+       my @parents = @$parents;
+       my $ps = $ed->{path_strip} || "";
+       for my $path ( grep { m/$ps/ } %{$ed->{dir_prop}} ) {
+               my $props = $ed->{dir_prop}{$path};
+               if ( $props->{"svk:merge"} ) {
+                       $self->find_extra_svk_parents
+                               ($ed, $props->{"svk:merge"}, \@parents);
+               }
+               if ( $props->{"svn:mergeinfo"} ) {
+                       $self->find_extra_svn_parents
+                               ($ed,
+                                $props->{"svn:mergeinfo"},
+                                \@parents);
+               }
+       }
+
        open my $un, '>>', "$self->{dir}/unhandled.log" or croak $!;
        print $un "r$rev\n" or croak $!;
        print $un $_, "\n" foreach @$untracked;
-       my %log_entry = ( parents => $parents || [], revision => $rev,
+       my %log_entry = ( parents => \@parents, revision => $rev,
                          log => '');
 
        my $headrev;
@@ -2734,7 +3806,11 @@ sub make_log_entry {
                        die "Can't have both 'useSvmProps' and 'rewriteRoot' ",
                            "options set!\n";
                }
-               my ($uuid, $r) = $headrev =~ m{^([a-f\d\-]{30,}):(\d+)$};
+               if ($self->rewrite_uuid) {
+                       die "Can't have both 'useSvmProps' and 'rewriteUUID' ",
+                           "options set!\n";
+               }
+               my ($uuid, $r) = $headrev =~ m{^([a-f\d\-]{30,}):(\d+)$}i;
                # we don't want "SVM: initializing mirror for junk" ...
                return undef if $r == 0;
                my $svm = $self->svm;
@@ -2764,10 +3840,10 @@ sub make_log_entry {
        } else {
                my $url = $self->metadata_url;
                remove_username($url);
-               $log_entry{metadata} = "$url\@$rev " .
-                                      $self->ra->get_uuid;
-               $email ||= "$author\@" . $self->ra->get_uuid;
-               $commit_email ||= "$author\@" . $self->ra->get_uuid;
+               my $uuid = $self->rewrite_uuid || $self->ra->get_uuid;
+               $log_entry{metadata} = "$url\@$rev " . $uuid;
+               $email ||= "$author\@" . $uuid;
+               $commit_email ||= "$author\@" . $uuid;
        }
        $log_entry{name} = $name;
        $log_entry{email} = $email;
@@ -2849,7 +3925,7 @@ sub rebuild {
                                '--');
        my $metadata_url = $self->metadata_url;
        remove_username($metadata_url);
-       my $svn_uuid = $self->ra_uuid;
+       my $svn_uuid = $self->rewrite_uuid || $self->ra_uuid;
        my $c;
        while (<$log>) {
                if ( m{^commit ($::sha1)$} ) {
@@ -2952,6 +4028,14 @@ sub _rev_map_set {
          croak "write: $!";
 }
 
+sub _rev_map_reset {
+       my ($fh, $rev, $commit) = @_;
+       my $c = _rev_map_get($fh, $rev);
+       $c eq $commit or die "_rev_map_reset(@_) commit $c does not match!\n";
+       my $offset = sysseek($fh, 0, SEEK_CUR) or croak "seek: $!";
+       truncate $fh, $offset or croak "truncate: $!";
+}
+
 sub mkfile {
        my ($path) = @_;
        unless (-e $path) {
@@ -2964,10 +4048,12 @@ sub mkfile {
 
 sub rev_map_set {
        my ($self, $rev, $commit, $update_ref, $uuid) = @_;
+       defined $commit or die "missing arg3\n";
        length $commit == 40 or die "arg3 must be a full SHA1 hexsum\n";
        my $db = $self->map_path($uuid);
        my $db_lock = "$db.lock";
        my $sig;
+       $update_ref ||= 0;
        if ($update_ref) {
                $SIG{INT} = $SIG{HUP} = $SIG{TERM} = $SIG{ALRM} = $SIG{PIPE} =
                            $SIG{USR1} = $SIG{USR2} = sub { $sig = $_[0] };
@@ -2991,7 +4077,8 @@ sub rev_map_set {
 
        sysopen(my $fh, $db_lock, O_RDWR | O_CREAT)
             or croak "Couldn't open $db_lock: $!\n";
-       _rev_map_set($fh, $rev, $commit);
+       $update_ref eq 'reset' ? _rev_map_reset($fh, $rev, $commit) :
+                                _rev_map_set($fh, $rev, $commit);
        if ($sync) {
                $fh->flush or die "Couldn't flush $db_lock: $!\n";
                $fh->sync or die "Couldn't sync $db_lock: $!\n";
@@ -2999,7 +4086,9 @@ sub rev_map_set {
        close $fh or croak $!;
        if ($update_ref) {
                $_head = $self;
-               command_noisy('update-ref', '-m', "r$rev",
+               my $note = "";
+               $note = " ($update_ref)" if ($update_ref !~ /^\d*$/);
+               command_noisy('update-ref', '-m', "r$rev$note",
                              $self->refname, $commit);
        }
        rename $db_lock, $db or die "rev_map_set(@_): ", "Failed to rename: ",
@@ -3061,12 +4150,19 @@ sub rev_map_get {
        return undef unless -e $map_path;
 
        sysopen(my $fh, $map_path, O_RDONLY) or croak "open: $!";
+       my $c = _rev_map_get($fh, $rev);
+       close($fh) or croak "close: $!";
+       $c
+}
+
+sub _rev_map_get {
+       my ($fh, $rev) = @_;
+
        binmode $fh or croak "binmode: $!";
        my $size = (stat($fh))[7];
        ($size % 24) == 0 or croak "inconsistent size: $size";
 
        if ($size == 0) {
-               close $fh or croak "close: $fh";
                return undef;
        }
 
@@ -3077,18 +4173,16 @@ sub rev_map_get {
                my $i = int(($l/24 + $u/24) / 2) * 24;
                sysseek($fh, $i, SEEK_SET) or croak "seek: $!";
                sysread($fh, my $buf, 24) == 24 or croak "read: $!";
-               my ($r, $c) = unpack('NH40', $buf);
+               my ($r, $c) = unpack(rev_map_fmt, $buf);
 
                if ($r < $rev) {
                        $l = $i + 24;
                } elsif ($r > $rev) {
                        $u = $i - 24;
                } else { # $r == $rev
-                       close($fh) or croak "close: $!";
                        return $c eq ('0' x 40) ? undef : $c;
                }
        }
-       close($fh) or croak "close: $!";
        undef;
 }
 
@@ -3100,6 +4194,8 @@ sub find_rev_before {
        my ($self, $rev, $eq_ok, $min_rev) = @_;
        --$rev unless $eq_ok;
        $min_rev ||= 1;
+       my $max_rev = $self->rev_map_max;
+       $rev = $max_rev if ($rev > $max_rev);
        while ($rev >= $min_rev) {
                if (my $c = $self->rev_map_get($rev)) {
                        return ($rev, $c);
@@ -3132,12 +4228,24 @@ sub _new {
                $repo_id = $Git::SVN::default_repo_id;
        }
        unless (defined $ref_id && length $ref_id) {
-               $_[2] = $ref_id = $Git::SVN::default_ref_id;
+               $_prefix = '' unless defined($_prefix);
+               $_[2] = $ref_id =
+                            "refs/remotes/$_prefix$Git::SVN::default_ref_id";
        }
        $_[1] = $repo_id;
        my $dir = "$ENV{GIT_DIR}/svn/$ref_id";
+
+       # Older repos imported by us used $GIT_DIR/svn/foo instead of
+       # $GIT_DIR/svn/refs/remotes/foo when tracking refs/remotes/foo
+       if ($ref_id =~ m{^refs/remotes/(.*)}) {
+               my $old_dir = "$ENV{GIT_DIR}/svn/$1";
+               if (-d $old_dir && ! -d $dir) {
+                       $dir = $old_dir;
+               }
+       }
+
        $_[3] = $path = '' unless (defined $path);
-       mkpath(["$ENV{GIT_DIR}/svn"]);
+       mkpath([$dir]);
        bless {
                ref_id => $ref_id, dir => $dir, index => "$dir/index",
                path => $path, config => "$ENV{GIT_DIR}/svn/config",
@@ -3175,6 +4283,12 @@ sub uri_encode {
        $f
 }
 
+sub uri_decode {
+       my ($f) = @_;
+       $f =~ s#%([0-9a-fA-F]{2})#chr(hex($1))#eg;
+       $f
+}
+
 sub remove_username {
        $_[0] =~ s{^([^:]*://)[^@]+@}{$1};
 }
@@ -3301,29 +4415,36 @@ sub username {
 
 sub _read_password {
        my ($prompt, $realm) = @_;
-       print STDERR $prompt;
-       STDERR->flush;
-       require Term::ReadKey;
-       Term::ReadKey::ReadMode('noecho');
        my $password = '';
-       while (defined(my $key = Term::ReadKey::ReadKey(0))) {
-               last if $key =~ /[\012\015]/; # \n\r
-               $password .= $key;
+       if (exists $ENV{GIT_ASKPASS}) {
+               open(PH, "-|", $ENV{GIT_ASKPASS}, $prompt);
+               $password = <PH>;
+               $password =~ s/[\012\015]//; # \n\r
+               close(PH);
+       } else {
+               print STDERR $prompt;
+               STDERR->flush;
+               require Term::ReadKey;
+               Term::ReadKey::ReadMode('noecho');
+               while (defined(my $key = Term::ReadKey::ReadKey(0))) {
+                       last if $key =~ /[\012\015]/; # \n\r
+                       $password .= $key;
+               }
+               Term::ReadKey::ReadMode('restore');
+               print STDERR "\n";
+               STDERR->flush;
        }
-       Term::ReadKey::ReadMode('restore');
-       print STDERR "\n";
-       STDERR->flush;
        $password;
 }
 
 package SVN::Git::Fetcher;
-use vars qw/@ISA/;
+use vars qw/@ISA $_ignore_regex $_preserve_empty_dirs $_placeholder_filename
+            @deleted_gpath %added_placeholder $repo_id/;
 use strict;
 use warnings;
 use Carp qw/croak/;
-use File::Temp qw/tempfile/;
+use File::Basename qw/dirname/;
 use IO::File qw//;
-use vars qw/$_ignore_regex/;
 
 # file baton members: path, mode_a, mode_b, pool, fh, blob, base
 sub new {
@@ -3335,14 +4456,41 @@ sub new {
                $self->{empty_symlinks} =
                                  _mark_empty_symlinks($git_svn, $switch_path);
        }
-       $self->{ignore_regex} = eval { command_oneline('config', '--get',
-                            "svn-remote.$git_svn->{repo_id}.ignore-paths") };
+
+       # some options are read globally, but can be overridden locally
+       # per [svn-remote "..."] section.  Command-line options will *NOT*
+       # override options set in an [svn-remote "..."] section
+       $repo_id = $git_svn->{repo_id};
+       my $k = "svn-remote.$repo_id.ignore-paths";
+       my $v = eval { command_oneline('config', '--get', $k) };
+       $self->{ignore_regex} = $v;
+
+       $k = "svn-remote.$repo_id.preserve-empty-dirs";
+       $v = eval { command_oneline('config', '--get', '--bool', $k) };
+       if ($v && $v eq 'true') {
+               $_preserve_empty_dirs = 1;
+               $k = "svn-remote.$repo_id.placeholder-filename";
+               $v = eval { command_oneline('config', '--get', $k) };
+               $_placeholder_filename = $v;
+       }
+
+       # Load the list of placeholder files added during previous invocations.
+       $k = "svn-remote.$repo_id.added-placeholder";
+       $v = eval { command_oneline('config', '--get-all', $k) };
+       if ($_preserve_empty_dirs && $v) {
+               # command() prints errors to stderr, so we only call it if
+               # command_oneline() succeeded.
+               my @v = command('config', '--get-all', $k);
+               $added_placeholder{ dirname($_) } = $_ foreach @v;
+       }
+
        $self->{empty} = {};
        $self->{dir_prop} = {};
        $self->{file_prop} = {};
        $self->{absent_dir} = {};
        $self->{absent_file} = {};
        $self->{gii} = $git_svn->tmp_index_do(sub { Git::IndexInfo->new });
+       $self->{pathnameencoding} = Git::config('svn.pathnameencoding');
        $self;
 }
 
@@ -3426,6 +4574,10 @@ sub open_directory {
 
 sub git_path {
        my ($self, $path) = @_;
+       if (my $enc = $self->{pathnameencoding}) {
+               require Encode;
+               Encode::from_to($path, 'UTF-8', $enc);
+       }
        if ($self->{path_strip}) {
                $path =~ s!$self->{path_strip}!! or
                  die "Failed to strip path '$path' ($self->{path_strip})\n";
@@ -3456,11 +4608,13 @@ sub delete_entry {
                }
                print "\tD\t$gpath/\n" unless $::_q;
                command_close_pipe($ls, $ctx);
-               $self->{empty}->{$path} = 0
        } else {
                $self->{gii}->remove($gpath);
                print "\tD\t$gpath\n" unless $::_q;
        }
+       # Don't add to @deleted_gpath if we're deleting a placeholder file.
+       push @deleted_gpath, $gpath unless $added_placeholder{dirname($path)};
+       $self->{empty}->{$path} = 0;
        undef;
 }
 
@@ -3492,7 +4646,15 @@ sub add_file {
                my ($dir, $file) = ($path =~ m#^(.*?)/?([^/]+)$#);
                delete $self->{empty}->{$dir};
                $mode = '100644';
+
+               if ($added_placeholder{$dir}) {
+                       # Remove our placeholder file, if we created one.
+                       delete_entry($self, $added_placeholder{$dir})
+                               unless $path eq $added_placeholder{$dir};
+                       delete $added_placeholder{$dir}
+               }
        }
+
        { path => $path, mode_a => $mode, mode_b => $mode,
          pool => SVN::Pool->new, action => 'A' };
 }
@@ -3510,6 +4672,7 @@ sub add_directory {
                        chomp;
                        $self->{gii}->remove($_);
                        print "\tD\t$_\n" unless $::_q;
+                       push @deleted_gpath, $gpath;
                }
                command_close_pipe($ls, $ctx);
                $self->{empty}->{$path} = 0;
@@ -3517,6 +4680,13 @@ sub add_directory {
        my ($dir, $file) = ($path =~ m#^(.*?)/?([^/]+)$#);
        delete $self->{empty}->{$dir};
        $self->{empty}->{$path} = 1;
+
+       if ($added_placeholder{$dir}) {
+               # Remove our placeholder file, if we created one.
+               delete_entry($self, $added_placeholder{$dir});
+               delete $added_placeholder{$dir}
+       }
+
 out:
        { path => $path };
 }
@@ -3680,12 +4850,96 @@ sub abort_edit {
 
 sub close_edit {
        my $self = shift;
+
+       if ($_preserve_empty_dirs) {
+               my @empty_dirs;
+
+               # Any entry flagged as empty that also has an associated
+               # dir_prop represents a newly created empty directory.
+               foreach my $i (keys %{$self->{empty}}) {
+                       push @empty_dirs, $i if exists $self->{dir_prop}->{$i};
+               }
+
+               # Search for directories that have become empty due subsequent
+               # file deletes.
+               push @empty_dirs, $self->find_empty_directories();
+
+               # Finally, add a placeholder file to each empty directory.
+               $self->add_placeholder_file($_) foreach (@empty_dirs);
+
+               $self->stash_placeholder_list();
+       }
+
        $self->{git_commit_ok} = 1;
        $self->{nr} = $self->{gii}->{nr};
        delete $self->{gii};
        $self->SUPER::close_edit(@_);
 }
 
+sub find_empty_directories {
+       my ($self) = @_;
+       my @empty_dirs;
+       my %dirs = map { dirname($_) => 1 } @deleted_gpath;
+
+       foreach my $dir (sort keys %dirs) {
+               next if $dir eq ".";
+
+               # If there have been any additions to this directory, there is
+               # no reason to check if it is empty.
+               my $skip_added = 0;
+               foreach my $t (qw/dir_prop file_prop/) {
+                       foreach my $path (keys %{ $self->{$t} }) {
+                               if (exists $self->{$t}->{dirname($path)}) {
+                                       $skip_added = 1;
+                                       last;
+                               }
+                       }
+                       last if $skip_added;
+               }
+               next if $skip_added;
+
+               # Use `git ls-tree` to get the filenames of this directory
+               # that existed prior to this particular commit.
+               my $ls = command('ls-tree', '-z', '--name-only',
+                                $self->{c}, "$dir/");
+               my %files = map { $_ => 1 } split(/\0/, $ls);
+
+               # Remove the filenames that were deleted during this commit.
+               delete $files{$_} foreach (@deleted_gpath);
+
+               # Report the directory if there are no filenames left.
+               push @empty_dirs, $dir unless (scalar %files);
+       }
+       @empty_dirs;
+}
+
+sub add_placeholder_file {
+       my ($self, $dir) = @_;
+       my $path = "$dir/$_placeholder_filename";
+       my $gpath = $self->git_path($path);
+
+       my $fh = $::_repository->temp_acquire($gpath);
+       my $hash = $::_repository->hash_and_insert_object(Git::temp_path($fh));
+       Git::temp_release($fh, 1);
+       $self->{gii}->update('100644', $hash, $gpath) or croak $!;
+
+       # The directory should no longer be considered empty.
+       delete $self->{empty}->{$dir} if exists $self->{empty}->{$dir};
+
+       # Keep track of any placeholder files we create.
+       $added_placeholder{$dir} = $path;
+}
+
+sub stash_placeholder_list {
+       my ($self) = @_;
+       my $k = "svn-remote.$repo_id.added-placeholder";
+       my $v = eval { command_oneline('config', '--get-all', $k) };
+       command_noisy('config', '--unset-all', $k) if $v;
+       foreach (values %added_placeholder) {
+               command_noisy('config', '--add', $k, $_);
+       }
+}
+
 package SVN::Git::Editor;
 use vars qw/@ISA $_rmdir $_cp_similarity $_find_copies_harder $_rename_limit/;
 use strict;
@@ -3721,6 +4975,7 @@ sub new {
        $self->{path_prefix} = length $self->{svn_path} ?
                               "$self->{svn_path}/" : '';
        $self->{config} = $opts->{config};
+       $self->{mergeinfo} = $opts->{mergeinfo};
        return $self;
 }
 
@@ -3814,13 +5069,17 @@ sub split_path {
 
 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, $path) = @_;
        if ($self->{url} =~ m#^https?://#) {
-               $path =~ s/([^~a-zA-Z0-9_.-])/uc sprintf("%%%02x",ord($1))/eg;
+               $path =~ s!([^~a-zA-Z0-9_./-])!uc sprintf("%%%02x",ord($1))!eg;
        }
        $self->{url} . '/' . $self->repo_path($path);
 }
@@ -4026,6 +5285,11 @@ sub change_file_prop {
        $self->SUPER::change_file_prop($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");
@@ -4119,8 +5383,13 @@ sub apply_diff {
                        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) {
+       if (@$mods == 0 && !defined($self->{mergeinfo})) {
                $self->abort_edit;
        } else {
                $self->close_edit;
@@ -4129,7 +5398,7 @@ sub apply_diff {
 }
 
 package Git::SVN::Ra;
-use vars qw/@ISA $config_dir $_log_window_size/;
+use vars qw/@ISA $config_dir $_ignore_refs_regex $_log_window_size/;
 use strict;
 use warnings;
 my ($ra_invalid, $can_do_switch, %ignored_err, $RA);
@@ -4194,6 +5463,8 @@ sub new {
        $url =~ s!/+$!!;
        return $RA if ($RA && $RA->{url} eq $url);
 
+       ::_req_svn();
+
        SVN::_Core::svn_config_ensure($config_dir, undef);
        my ($baton, $callbacks) = SVN::Core::auth_open_helper(_auth_providers);
        my $config = SVN::Core::config_get_config($config_dir);
@@ -4280,6 +5551,34 @@ sub get_log {
        my ($self, @args) = @_;
        my $pool = SVN::Pool->new;
 
+       # svn_log_changed_path_t objects passed to get_log are likely to be
+       # overwritten even if only the refs are copied to an external variable,
+       # so we should dup the structures in their entirety.  Using an
+       # externally passed pool (instead of our temporary and quickly cleared
+       # pool in Git::SVN::Ra) does not help matters at all...
+       my $receiver = pop @args;
+       my $prefix = "/".$self->{svn_path};
+       $prefix =~ s#/+($)##;
+       my $prefix_regex = qr#^\Q$prefix\E#;
+       push(@args, sub {
+               my ($paths) = $_[0];
+               return &$receiver(@_) unless $paths;
+               $_[0] = ();
+               foreach my $p (keys %$paths) {
+                       my $i = $paths->{$p};
+                       # Make path relative to our url, not repos_root
+                       $p =~ s/$prefix_regex//;
+                       my %s = map { $_ => $i->$_; }
+                               qw/copyfrom_path copyfrom_rev action/;
+                       if ($s{'copyfrom_path'}) {
+                               $s{'copyfrom_path'} =~ s/$prefix_regex//;
+                       }
+                       $_[0]{$p} = \%s;
+               }
+               &$receiver(@_);
+       });
+
+
        # the limit parameter was not supported in SVN 1.1.x, so we
        # drop it.  Therefore, the receiver callback passed to it
        # is made aware of this limitation by being wrapped if
@@ -4364,10 +5663,12 @@ sub gs_do_switch {
 
        my $full_url = $self->{url};
        my $old_url = $full_url;
-       $full_url .= '/' . escape_uri_only($path) if length $path;
+       $full_url .= '/' . $path if length $path;
        my ($ra, $reparented);
 
-       if ($old_url =~ m#^svn(\+ssh)?://#) {
+       if ($old_url =~ m#^svn(\+ssh)?://# ||
+           ($full_url =~ m#^https?://# &&
+            escape_url($full_url) ne $full_url)) {
                $_[0] = undef;
                $self = undef;
                $RA = undef;
@@ -4438,6 +5739,7 @@ sub gs_fetch_loop_common {
        my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
        my $longest_path = longest_common_path($gsv, $globs);
        my $ra_url = $self->{url};
+       my $find_trailing_edge;
        while (1) {
                my %revs;
                my $err;
@@ -4448,15 +5750,17 @@ sub gs_fetch_loop_common {
                };
                sub _cb {
                        my ($paths, $r, $author, $date, $log) = @_;
-                       [ dup_changed_paths($paths),
+                       [ $paths,
                          { author => $author, date => $date, log => $log } ];
                }
                $self->get_log([$longest_path], $min, $max, 0, 1, 1,
                               sub { $revs{$_[1]} = _cb(@_) });
                if ($err) {
                        print "Checked through r$max\r";
+               } else {
+                       $find_trailing_edge = 1;
                }
-               if ($err && $max >= $head) {
+               if ($err and $find_trailing_edge) {
                        print STDERR "Path '$longest_path' ",
                                     "was probably deleted:\n",
                                     $err->expanded_message,
@@ -4468,13 +5772,14 @@ sub gs_fetch_loop_common {
                                my $ok;
                                $self->get_log([$longest_path], $min, $hi,
                                               0, 1, 1, sub {
-                                              $ok ||= $_[1];
+                                              $ok = $_[1];
                                               $revs{$_[1]} = _cb(@_) });
                                if ($ok) {
                                        print STDERR "r$min .. r$ok OK\n";
                                        last;
                                }
                        }
+                       $find_trailing_edge = 0;
                }
                $SVN::Error::handler = $err_handler;
 
@@ -4551,6 +5856,17 @@ sub get_dir_globbed {
        @finalents;
 }
 
+# return value: 0 -- don't ignore, 1 -- ignore
+sub is_ref_ignored {
+       my ($g, $p) = @_;
+       my $refname = $g->{ref}->full_path($p);
+       return 1 if defined($g->{ignore_refs_regex}) &&
+                   $refname =~ m!$g->{ignore_refs_regex}!;
+       return 0 unless defined($_ignore_refs_regex);
+       return 1 if $refname =~ m!$_ignore_refs_regex!o;
+       return 0;
+}
+
 sub match_globs {
        my ($self, $exists, $paths, $globs, $r) = @_;
 
@@ -4567,6 +5883,7 @@ sub match_globs {
                        next if (length $g->{path}->{right} &&
                                 ($self->check_path($p, $r) !=
                                  $SVN::Node::dir));
+                       next unless $p =~ /$g->{path}->{regex}/;
                        $exists->{$p} = Git::SVN->init($self->{url}, $p, undef,
                                         $g->{ref}->full_path($de), 1);
                }
@@ -4586,6 +5903,7 @@ sub match_globs {
                        next unless /$g->{path}->{regex}/;
                        my $p = $1;
                        my $pathname = $g->{path}->full_path($p);
+                       next if is_ref_ignored($g, $p);
                        next if $exists->{$pathname};
                        next if ($self->check_path($pathname, $r) !=
                                 $SVN::Node::dir);
@@ -4612,7 +5930,11 @@ sub minimize_url {
        my $c = '';
        do {
                $url .= "/$c" if length $c;
-               eval { (ref $self)->new($url)->get_latest_revnum };
+               eval {
+                       my $ra = (ref $self)->new($url);
+                       my $latest = $ra->get_latest_revnum;
+                       $ra->get_log("", $latest, 0, 1, 0, 1, sub {});
+               };
        } while ($@ && ($c = shift @components));
        $url;
 }
@@ -4668,24 +5990,6 @@ sub skip_unknown_revs {
        die "Error from SVN, ($errno): ", $err->expanded_message,"\n";
 }
 
-# svn_log_changed_path_t objects passed to get_log are likely to be
-# overwritten even if only the refs are copied to an external variable,
-# so we should dup the structures in their entirety.  Using an externally
-# passed pool (instead of our temporary and quickly cleared pool in
-# Git::SVN::Ra) does not help matters at all...
-sub dup_changed_paths {
-       my ($paths) = @_;
-       return undef unless $paths;
-       my %ret;
-       foreach my $p (keys %$paths) {
-               my $i = $paths->{$p};
-               my %s = map { $_ => $i->$_ }
-                             qw/copyfrom_path copyfrom_rev action/;
-               $ret{$p} = \%s;
-       }
-       \%ret;
-}
-
 package Git::SVN::Log;
 use strict;
 use warnings;
@@ -4773,17 +6077,20 @@ sub git_svn_log_cmd {
 
 # adapted from pager.c
 sub config_pager {
-       $pager ||= $ENV{GIT_PAGER} || $ENV{PAGER};
-       if (!defined $pager) {
-               $pager = 'less';
-       } elsif (length $pager == 0 || $pager eq 'cat') {
+       if (! -t *STDOUT) {
+               $ENV{GIT_PAGER_IN_USE} = 'false';
+               $pager = undef;
+               return;
+       }
+       chomp($pager = command_oneline(qw(var GIT_PAGER)));
+       if ($pager eq 'cat') {
                $pager = undef;
        }
        $ENV{GIT_PAGER_IN_USE} = defined($pager);
 }
 
 sub run_pager {
-       return unless -t *STDOUT && defined $pager;
+       return unless defined $pager;
        pipe my ($rfd, $wfd) or return;
        defined(my $pid = fork) or ::fatal "Can't fork: $!";
        if (!$pid) {
@@ -4961,7 +6268,7 @@ sub cmd_show_log {
        my (@k, $c, $d, $stat);
        my $esc_color = qr/(?:\033\[(?:(?:\d+;)*\d*)?m)*/;
        while (<$log>) {
-               if (/^${esc_color}commit -?($::sha1_short)/o) {
+               if (/^${esc_color}commit (?:- )?($::sha1_short)/o) {
                        my $cmt = $1;
                        if ($c && cmt_showable($c) && $c->{r} != $r_last) {
                                $r_last = $c->{r};
@@ -5290,7 +6597,7 @@ sub minimize_connections {
                        my $pfx = "svn-remote.$x->{old_repo_id}";
 
                        my $old_fetch = quotemeta("$x->{old_path}:".
-                                                 "refs/remotes/$x->{ref_id}");
+                                                 "$x->{ref_id}");
                        command_noisy(qw/config --unset/,
                                      "$pfx.fetch", '^'. $old_fetch . '$');
                        delete $r->{$x->{old_repo_id}}->
@@ -5356,29 +6663,48 @@ package Git::SVN::GlobSpec;
 use warnings;
 
 sub new {
-       my ($class, $glob) = @_;
+       my ($class, $glob, $pattern_ok) = @_;
        my $re = $glob;
        $re =~ s!/+$!!g; # no need for trailing slashes
-       $re =~ m!^([^*]*)(\*(?:/\*)*)([^*]*)$!;
-       my $temp = $re;
-       my ($left, $right) = ($1, $3);
-       $re = $2;
-       my $depth = $re =~ tr/*/*/;
-       if ($depth != $temp =~ tr/*/*/) {
-               die "Only one set of wildcard directories " .
-                       "(e.g. '*' or '*/*/*') is supported: '$glob'\n";
+       my (@left, @right, @patterns);
+       my $state = "left";
+       my $die_msg = "Only one set of wildcard directories " .
+                               "(e.g. '*' or '*/*/*') is supported: '$glob'\n";
+       for my $part (split(m|/|, $glob)) {
+               if ($part =~ /\*/ && $part ne "*") {
+                       die "Invalid pattern in '$glob': $part\n";
+               } elsif ($pattern_ok && $part =~ /[{}]/ &&
+                        $part !~ /^\{[^{}]+\}/) {
+                       die "Invalid pattern in '$glob': $part\n";
+               }
+               if ($part eq "*") {
+                       die $die_msg if $state eq "right";
+                       $state = "pattern";
+                       push(@patterns, "[^/]*");
+               } elsif ($pattern_ok && $part =~ /^\{(.*)\}$/) {
+                       die $die_msg if $state eq "right";
+                       $state = "pattern";
+                       my $p = quotemeta($1);
+                       $p =~ s/\\,/|/g;
+                       push(@patterns, "(?:$p)");
+               } else {
+                       if ($state eq "left") {
+                               push(@left, $part);
+                       } else {
+                               push(@right, $part);
+                               $state = "right";
+                       }
+               }
        }
+       my $depth = @patterns;
        if ($depth == 0) {
-               die "One '*' is needed for glob: '$glob'\n";
-       }
-       $re =~ s!\*!\[^/\]*!g;
-       $re = quotemeta($left) . "($re)" . quotemeta($right);
-       if (length $left && !($left =~ s!/+$!!g)) {
-               die "Missing trailing '/' on left side of: '$glob' ($left)\n";
-       }
-       if (length $right && !($right =~ s!^/+!!g)) {
-               die "Missing leading '/' on right side of: '$glob' ($right)\n";
+               die "One '*' is needed in glob: '$glob'\n";
        }
+       my $left = join('/', @left);
+       my $right = join('/', @right);
+       $re = join('/', @patterns);
+       $re = join('\/',
+                  grep(length, quotemeta($left), "($re)", quotemeta($right)));
        my $left_re = qr/^\/\Q$left\E(\/|$)/;
        bless { left => $left, right => $right, left_regex => $left_re,
                regex => qr/$re/, glob => $glob, depth => $depth }, $class;