git-svn: fix useSvmProps, hopefully for the last time

svm:mirror is not useful at all for us.  Parts of the old unit
test were broken and based on my misunderstanding of the
svm:mirror property.

When we read svm:source; make sure we correctly handle the '!'
in it: it is used to separate the path of the repository root
from the virtual path within the repository.  We don't need
to make that distinction, honestly!

We also ensure that subdirectories are also mirrored with the
correct URL if we're using useSvmProps.

We have a new test that uses dumped repo that was really
created using SVN::Mirror to avoid ambiguities and
mis-understandings about the svm: properties.

Note: trailing whitespace in the svm.dump file is unfortunately
a reality and required by SVN; so please ignore it when applying
this patch.

Also, ensure that the -R/--remote/--svn-remote flag is always
in effect if explicitly passed via the command-line.  This
allows us to track logically different mirrors sharing the
same URL (probably common with SVN::Mirror/SVK users).

Signed-off-by: Eric Wong <normalperson@yhbt.net>

4 files changed, 619 insertions, 140 deletions

diff --git a/git-svn.perl b/git-svn.perl
index 7563eea35..1bcf058ef 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -164,7 +164,9 @@ read_repo_config(\%opts);
 my $rv = GetOptions(%opts, 'help|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' => \$Git::SVN::default_repo_id);
+                    'svn-remote|remote|R=s' => sub {
+                       $Git::SVN::no_reuse_existing = 1;
+                       $Git::SVN::default_repo_id = $_[1] });
 exit 1 if (!$rv && $cmd ne 'log');
 
 usage(0) if $_help;
@@ -749,7 +751,7 @@ use strict;
 use warnings;
 use vars qw/$default_repo_id $default_ref_id $_no_metadata $_follow_parent
             $_repack $_repack_flags $_use_svm_props $_head
-            $_use_svnsync_props/;
+            $_use_svnsync_props $no_reuse_existing/;
 use Carp qw/croak/;
 use File::Path qw/mkpath/;
 use File::Copy qw/copy/;
@@ -944,6 +946,7 @@ sub sanitize_remote_name {
 
 sub find_existing_remote {
 	my ($url, $remotes) = @_;
+	return undef if $no_reuse_existing;
 	my $existing;
 	foreach my $repo_id (keys %$remotes) {
 		my $u = $remotes->{$repo_id}->{url} or next;
@@ -1116,9 +1119,12 @@ sub svm {
 		$svm = {
 		  source => tmp_config('--get', "$section.svm-source"),
 		  uuid => tmp_config('--get', "$section.svm-uuid"),
+		  replace => tmp_config('--get', "$section.svm-replace"),
 		}
 	};
-	$self->{svm} = $svm if ($svm && $svm->{source} && $svm->{uuid});
+	if ($svm && $svm->{source} && $svm->{uuid} && $svm->{replace}) {
+		$self->{svm} = $svm;
+	}
 	$self->{svm};
 }
 
@@ -1127,64 +1133,76 @@ sub _set_svm_vars {
 	return $ra if $self->svm;
 
 	my @err = ( "useSvmProps set, but failed to read SVM properties\n",
-		    "(svm:source, svm:mirror, svm:mirror) ",
+		    "(svm:source, svm:uuid) ",
 		    "from the following URLs:\n" );
 	sub read_svm_props {
-		my ($self, $props) = @_;
+		my ($self, $ra, $path, $r) = @_;
+		my $props = ($ra->get_dir($path, $r))[2];
 		my $src = $props->{'svm:source'};
-		my $mirror = $props->{'svm:mirror'};
 		my $uuid = $props->{'svm:uuid'};
-		return undef if (!$src || !$mirror || !$uuid);
+		return undef if (!$src || !$uuid);
 
-		chomp($src, $mirror, $uuid);
+		chomp($src, $uuid);
 
 		$uuid =~ m{^[0-9a-f\-]{30,}$}
 		    or die "doesn't look right - svm:uuid is '$uuid'\n";
-		# don't know what a '!' is there for, also the
-		# username is of no interest
-		$src =~ s{/?!$}{$mirror};
+
+		# the '!' is used to mark the repos_root!/relative/path
+		$src =~ s{/?!/?}{/};
 		$src =~ s{/+$}{}; # no trailing slashes please
+		# username is of no interest
 		$src =~ s{(^[a-z\+]*://)[^/@]*@}{$1};
 
+		my $replace = $ra->{url};
+		$replace .= "/$path" if length $path;
+
 		my $section = "svn-remote.$self->{repo_id}";
-		tmp_config('--add', "$section.svm-source", $src);
-		tmp_config('--add', "$section.svm-uuid", $uuid);
-		$self->{svm} = { source => $src , uuid => $uuid };
-		return 1;
+		tmp_config("$section.svm-source", $src);
+		tmp_config("$section.svm-replace", $replace);
+		tmp_config("$section.svm-uuid", $uuid);
+		$self->{svm} = {
+			source => $src,
+			uuid => $uuid,
+			replace => $replace
+		};
 	}
 
 	my $r = $ra->get_latest_revnum;
 	my $path = $self->{path};
-	my @tried_a = ($path);
+	my %tried;
 	while (length $path) {
-		if ($self->read_svm_props(($ra->get_dir($path, $r))[2])) {
-			return $ra;
+		unless ($tried{"$self->{url}/$path"}) {
+			return $ra if $self->read_svm_props($ra, $path, $r);
+			$tried{"$self->{url}/$path"} = 1;
 		}
-		$path =~ s#/?[^/]+$## && push @tried_a, $path;
-	}
-	if ($self->read_svm_props(($ra->get_dir('', $r))[2])) {
-		return $ra;
+		$path =~ s#/?[^/]+$##;
 	}
+	die "Path: '$path' should be ''\n" if $path ne '';
+	return $ra if $self->read_svm_props($ra, $path, $r);
+	$tried{"$self->{url}/$path"} = 1;
 
 	if ($ra->{repos_root} eq $self->{url}) {
-		die @err, map { "  $self->{url}/$_\n" } @tried_a, "\n";
+		die @err, (map { "  $_\n" } keys %tried), "\n";
 	}
 
 	# nope, make sure we're connected to the repository root:
 	my $ok;
 	my @tried_b;
 	$path = $ra->{svn_path};
-	$path =~ s#/?[^/]+$##; # we already tried this one above
 	$ra = Git::SVN::Ra->new($ra->{repos_root});
 	while (length $path) {
-		$ok = $self->read_svm_props(($ra->get_dir($path, $r))[2]);
-		last if $ok;
-		$path =~ s#/?[^/]+$## && push @tried_b, $path;
+		unless ($tried{"$ra->{url}/$path"}) {
+			$ok = $self->read_svm_props($ra, $path, $r);
+			last if $ok;
+			$tried{"$ra->{url}/$path"} = 1;
+		}
+		$path =~ s#/?[^/]+$##;
 	}
-	$ok = $self->read_svm_props(($ra->get_dir('', $r))[2]) unless $ok;
+	die "Path: '$path' should be ''\n" if $path ne '';
+	$ok ||= $self->read_svm_props($ra, $path, $r);
+	$tried{"$ra->{url}/$path"} = 1;
 	if (!$ok) {
-		die @err, map { "  $self->{url}/$_\n" } @tried_a, "\n",
-		          map { "  $ra->{url}/$_\n" } @tried_b, "\n"
+		die @err, (map { "  $_\n" } keys %tried), "\n";
 	}
 	Git::SVN::Ra->new($self->{url});
 }
@@ -1779,13 +1797,18 @@ sub make_log_entry {
 			    "options set!\n";
 		}
 		my ($uuid, $r) = $headrev =~ m{^([a-f\d\-]{30,}):(\d+)$};
-		if ($uuid ne $self->{svm}->{uuid}) {
+		# we don't want "SVM: initializing mirror for junk" ...
+		return undef if $r == 0;
+		my $svm = $self->svm;
+		if ($uuid ne $svm->{uuid}) {
 			die "UUID mismatch on SVM path:\n",
-			    "expected: $self->{svm}->{uuid}\n",
+			    "expected: $svm->{uuid}\n",
 			    "     got: $uuid\n";
 		}
-		my $full_url = $self->{svm}->{source};
-		$full_url .= "/$self->{path}" if length $self->{path};
+		my $full_url = $self->full_url;
+		$full_url =~ s#^\Q$svm->{replace}\E(/|$)#$svm->{source}$1# or
+		             die "Failed to replace '$svm->{replace}' with ",
+		                 "'$svm->{source}' in $full_url\n";
 		$log_entry{metadata} = "$full_url\@$r $uuid";
 		$log_entry{svm_revision} = $r;
 		$email ||= "$author\@$uuid"
diff --git a/t/t9109-git-svn-svk-mirrorpaths.sh b/t/t9109-git-svn-svk-mirrorpaths.sh
deleted file mode 100755
index 1e1b97b5f..000000000
--- a/t/t9109-git-svn-svk-mirrorpaths.sh
+++ /dev/null
@@ -1,106 +0,0 @@
-#!/bin/sh
-#
-# Copyright (c) 2006 Sam Vilian
-#
-
-test_description='git-svn on SVK mirror paths'
-. ./lib-git-svn.sh
-
-# ok, people who don't have SVK installed probably don't care about
-# this test.
-
-# we set up the repository manually, because even if SVK is installed
-# it is difficult to use it in a way that is idempotent.
-
-# we are not yet testing merge tickets..
-
-uuid=b00bface-b1ff-c0ff-f0ff-b0bafe775e1e
-url=https://really.slow.server.com/foobar
-
-test_expect_success 'initialize repo' "
-	git config svn-remote.svn.useSvmProps true &&
-
-	echo '#!/bin/sh' > $rawsvnrepo/hooks/pre-revprop-change &&
-	echo 'exit 0' >> $rawsvnrepo/hooks/pre-revprop-change &&
-	chmod +x $rawsvnrepo/hooks/pre-revprop-change &&
-
-	mkdir import &&
-	cd import &&
-	mkdir local &&
-	echo hello > local/readme &&
-	svn import -m 'random local work' . $svnrepo &&
-	cd .. &&
-
-	svn co $svnrepo wc &&
-	cd wc &&
-	mkdir -p mirror/foobar &&
-	svn add mirror &&
-	svn ps svm:source $url mirror/foobar &&
-	svn ps svm:uuid $uuid mirror/foobar &&
-	svn ps svm:mirror / mirror/foobar &&
-	svn commit -m 'setup mirror/foobar as mirror of upstream' &&
-	svn ps -r 2 --revprop svm:headrev $uuid:0 $svnrepo &&
-
-	mkdir mirror/foobar/trunk
-	echo hello, world > mirror/foobar/trunk/readme &&
-	svn add mirror/foobar/trunk &&
-	svn commit -m 'first upstream revision' &&
-	svn ps -r 3 --revprop svm:headrev $uuid:1 $svnrepo &&
-
-	svn up &&
-	svn mkdir mirror/foobar/branches &&
-	svn cp mirror/foobar/trunk mirror/foobar/branches/silly &&
-	svn commit -m 'make branch for silliness' &&
-	svn ps -r 4 --revprop svm:headrev $uuid:2 $svnrepo &&
-
-	svn up &&
-	echo random untested feature >> mirror/foobar/trunk/readme &&
-	poke mirror/foobar/trunk/readme &&
-	svn commit -m 'add a c00l feature to trunk' &&
-	svn ps -r 5 --revprop svm:headrev $uuid:3 $svnrepo &&
-
-	svn up &&
-	echo bug fix >> mirror/foobar/branches/silly/readme &&
-	poke mirror/foobar/branches/silly/readme &&
-	svn commit -m 'fix a bug' &&
-	svn ps -r 6 --revprop svm:headrev $uuid:4 $svnrepo &&
-
-	svn mkdir mirror/foobar/tags &&
-	svn cp mirror/foobar/branches/silly mirror/foobar/tags/blah-1.0 &&
-	svn commit -m 'make a release' &&
-	svn ps -r 7 --revprop svm:headrev $uuid:5 $svnrepo &&
-
-	cd ..
-	"
-
-test_expect_success 'init an SVK mirror path' "
-	git-svn init -T trunk -t tags -b branches $svnrepo/mirror/foobar
-	"
-
-test_expect_success 'multi-fetch an SVK mirror path' "git-svn multi-fetch"
-
-test_expect_success 'got tag history OK' "
-	test \`git-log --pretty=oneline remotes/tags/blah-1.0 | wc -l\` -eq 3
-	"
-
-test_expect_success 're-wrote git-svn-id URL, revision and UUID' "
-	git cat-file commit refs/remotes/trunk | \
-	    fgrep 'git-svn-id: $url/mirror/foobar/trunk@3 $uuid' &&
-	git cat-file commit refs/remotes/tags/blah-1.0 | \
-	    fgrep 'git-svn-id: $url/mirror/foobar/tags/blah-1.0@5 $uuid'
-	git cat-file commit refs/remotes/silly | \
-	    fgrep 'git-svn-id: $url/mirror/foobar/branches/silly@4 $uuid'
-	"
-
-test_expect_success 're-wrote author e-mail domain UUID' "
-	test \`git log --pretty=fuller trunk | \
-	       grep '<.*@.*>' | fgrep '@$uuid>' | wc -l\` -eq 4 &&
-	test \`git log --pretty=fuller remotes/silly | \
-	       grep '<.*@.*>' | fgrep '@$uuid>' | wc -l\` -eq 6 &&
-	test \`git log --pretty=fuller remotes/tags/blah-1.0 | \
-	       grep '<.*@.*>' | fgrep '@$uuid>' | wc -l\` -eq 6
-	"
-
-test_debug 'gitk --all &'
-
-test_done
diff --git a/t/t9110-git-svn-use-svm-props.sh b/t/t9110-git-svn-use-svm-props.sh
new file mode 100755
index 000000000..9db0d8fd8
--- /dev/null
+++ b/t/t9110-git-svn-use-svm-props.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+#
+# Copyright (c) 2007 Eric Wong
+#
+
+test_description='git-svn useSvmProps test'
+
+. ./lib-git-svn.sh
+
+test_expect_success 'load svm repo' "
+	svnadmin load -q $rawsvnrepo < ../t9110/svm.dump &&
+	git-svn init -R arr -i bar $svnrepo/mirror/arr &&
+	git-svn init -R argh -i dir $svnrepo/mirror/argh &&
+	git-svn init -R argh -i e $svnrepo/mirror/argh/a/b/c/d/e &&
+	git-config svn.useSvmProps true &&
+	git-svn fetch --all
+	"
+
+uuid=161ce429-a9dd-4828-af4a-52023f968c89
+
+bar_url=http://mayonaise/svnrepo/bar
+test_expect_success 'verify metadata for /bar' "
+	git-cat-file commit refs/remotes/bar | \
+	   grep '^git-svn-id: $bar_url@12 $uuid$' &&
+	git-cat-file commit refs/remotes/bar~1 | \
+	   grep '^git-svn-id: $bar_url@11 $uuid$' &&
+	git-cat-file commit refs/remotes/bar~2 | \
+	   grep '^git-svn-id: $bar_url@10 $uuid$' &&
+	git-cat-file commit refs/remotes/bar~3 | \
+	   grep '^git-svn-id: $bar_url@9 $uuid$' &&
+	git-cat-file commit refs/remotes/bar~4 | \
+	   grep '^git-svn-id: $bar_url@6 $uuid$' &&
+	git-cat-file commit refs/remotes/bar~5 | \
+	   grep '^git-svn-id: $bar_url@1 $uuid$'
+	"
+
+e_url=http://mayonaise/svnrepo/dir/a/b/c/d/e
+test_expect_success 'verify metadata for /dir/a/b/c/d/e' "
+	git-cat-file commit refs/remotes/e | \
+	   grep '^git-svn-id: $e_url@1 $uuid$'
+	"
+
+dir_url=http://mayonaise/svnrepo/dir
+test_expect_success 'verify metadata for /dir' "
+	git-cat-file commit refs/remotes/dir | \
+	   grep '^git-svn-id: $dir_url@2 $uuid$' &&
+	git-cat-file commit refs/remotes/dir~1 | \
+	   grep '^git-svn-id: $dir_url@1 $uuid$'
+	"
+
+test_done
diff --git a/t/t9110/svm.dump b/t/t9110/svm.dump
new file mode 100644
index 000000000..cc799c238
--- /dev/null
+++ b/t/t9110/svm.dump
@@ -0,0 +1,511 @@
+SVN-fs-dump-format-version: 2
+
+UUID: de5973c6-545d-41da-aded-c265f9039e74
+
+Revision-number: 0
+Prop-content-length: 56
+Content-length: 56
+
+K 8
+svn:date
+V 27
+2007-02-17T06:54:59.793104Z
+PROPS-END
+
+Revision-number: 1
+Prop-content-length: 200
+Content-length: 200
+
+K 7
+svn:log
+V 40
+SVM: initializing mirror for /mirror/arr
+K 10
+svn:author
+V 3
+svm
+K 11
+svm:headrev
+V 39
+161ce429-a9dd-4828-af4a-52023f968c89:0
+
+K 8
+svn:date
+V 27
+2007-02-17T06:55:00.121647Z
+PROPS-END
+
+Node-path: 
+Node-kind: dir
+Node-action: change
+Prop-content-length: 44
+Content-length: 44
+
+K 10
+svm:mirror
+V 12
+/mirror/arr
+
+PROPS-END
+
+
+Node-path: mirror
+Node-kind: dir
+Node-action: add
+Prop-content-length: 10
+Content-length: 10
+
+PROPS-END
+
+
+Node-path: mirror/arr
+Node-kind: dir
+Node-action: add
+Prop-content-length: 116
+Content-length: 116
+
+K 10
+svm:source
+V 29
+http://mayonaise/svnrepo!/bar
+K 8
+svm:uuid
+V 36
+161ce429-a9dd-4828-af4a-52023f968c89
+PROPS-END
+
+
+Revision-number: 2
+Prop-content-length: 182
+Content-length: 182
+
+K 7
+svn:log
+V 18
+import for git-svn
+K 10
+svn:author
+V 7
+svnsync
+K 11
+svm:headrev
+V 39
+161ce429-a9dd-4828-af4a-52023f968c89:1
+
+K 8
+svn:date
+V 27
+2007-02-17T05:10:52.108847Z
+PROPS-END
+
+Node-path: mirror/arr
+Node-kind: dir
+Node-action: change
+Prop-content-length: 116
+Content-length: 116
+
+K 10
+svm:source
+V 29
+http://mayonaise/svnrepo!/bar
+K 8
+svm:uuid
+V 36
+161ce429-a9dd-4828-af4a-52023f968c89
+PROPS-END
+
+
+Node-path: mirror/arr/zzz
+Node-kind: file
+Node-action: add
+Prop-content-length: 10
+Text-content-length: 4
+Text-content-md5: 33b02bc15ce9557d2dd8484d58f95ac4
+Content-length: 14
+
+PROPS-END
+zzz
+
+
+Revision-number: 3
+Prop-content-length: 230
+Content-length: 230
+
+K 7
+svn:log
+V 66
+new symlink is added to a file that was also just made executable
+
+K 10
+svn:author
+V 7
+svnsync
+K 11
+svm:headrev
+V 39
+161ce429-a9dd-4828-af4a-52023f968c89:6
+
+K 8
+svn:date
+V 27
+2007-02-17T05:11:01.686891Z
+PROPS-END
+
+Node-path: mirror/arr/zzz
+Node-kind: file
+Node-action: change
+Prop-content-length: 36
+Text-content-length: 4
+Text-content-md5: 33b02bc15ce9557d2dd8484d58f95ac4
+Content-length: 40
+
+K 14
+svn:executable
+V 1
+*
+PROPS-END
+zzz
+
+
+Revision-number: 4
+Prop-content-length: 192
+Content-length: 192
+
+K 7
+svn:log
+V 28
+/bar/d should be in the log
+
+K 10
+svn:author
+V 7
+svnsync
+K 11
+svm:headrev
+V 39
+161ce429-a9dd-4828-af4a-52023f968c89:9
+
+K 8
+svn:date
+V 27
+2007-02-17T05:11:07.686552Z
+PROPS-END
+
+Node-path: mirror/arr/d
+Node-kind: file
+Node-action: add
+Prop-content-length: 10
+Text-content-length: 4
+Text-content-md5: 0bee89b07a248e27c83fc3d5951213c1
+Content-length: 14
+
+PROPS-END
+abc
+
+
+Revision-number: 5
+Prop-content-length: 185
+Content-length: 185
+
+K 7
+svn:log
+V 20
+add a new directory
+
+K 10
+svn:author
+V 7
+svnsync
+K 11
+svm:headrev
+V 40
+161ce429-a9dd-4828-af4a-52023f968c89:10
+
+K 8
+svn:date
+V 27
+2007-02-17T05:11:08.405953Z
+PROPS-END
+
+Node-path: mirror/arr/newdir
+Node-kind: dir
+Node-action: add
+Prop-content-length: 10
+Content-length: 10
+
+PROPS-END
+
+
+Node-path: mirror/arr/newdir/dir
+Node-kind: file
+Node-action: add
+Prop-content-length: 10
+Text-content-length: 4
+Text-content-md5: 9cd599a3523898e6a12e13ec787da50a
+Content-length: 14
+
+PROPS-END
+new
+
+
+Revision-number: 6
+Prop-content-length: 196
+Content-length: 196
+
+K 7
+svn:log
+V 31
+modify a file in new directory
+
+K 10
+svn:author
+V 7
+svnsync
+K 11
+svm:headrev
+V 40
+161ce429-a9dd-4828-af4a-52023f968c89:11
+
+K 8
+svn:date
+V 27
+2007-02-17T05:11:09.126645Z
+PROPS-END
+
+Node-path: mirror/arr/newdir/dir
+Node-kind: file
+Node-action: change
+Text-content-length: 8
+Text-content-md5: a950e20332358e523a5e9d571e47fa64
+Content-length: 8
+
+new
+foo
+
+
+Revision-number: 7
+Prop-content-length: 179
+Content-length: 179
+
+K 7
+svn:log
+V 14
+update /bar/d
+
+K 10
+svn:author
+V 7
+svnsync
+K 11
+svm:headrev
+V 40
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