git-svn: introduce add_path_to_url function

Remove the ad-hoc versions.

This is mostly to normalize the process and ensure the URLs produced
don't have double slashes or anything.

Also provides a place to fix the corner case where a file path
contains a percent sign.

[ew: commit title]

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

2 files changed, 31 insertions, 4 deletions

diff --git a/perl/Git/SVN/Ra.pm b/perl/Git/SVN/Ra.pm
index c88b2b91da..ec3c570b21 100644
--- a/perl/Git/SVN/Ra.pm
+++ b/perl/Git/SVN/Ra.pm
@@ -5,6 +5,7 @@ use warnings;
 use SVN::Client;
 use Git::SVN::Utils qw(
 	canonicalize_url
+	add_path_to_url
 );
 
 use SVN::Ra;
@@ -287,9 +288,8 @@ sub gs_do_switch {
 	my $path = $gs->path;
 	my $pool = SVN::Pool->new;
 
-	my $full_url = $self->url;
-	my $old_url = $full_url;
-	$full_url .= '/' . $path if length $path;
+	my $old_url = $self->url;
+	my $full_url = add_path_to_url( $self->url, $path );
 	my ($ra, $reparented);
 
 	if ($old_url =~ m#^svn(\+ssh)?://# ||
@@ -555,7 +555,7 @@ sub minimize_url {
 	my @components = split(m!/!, $self->{svn_path});
 	my $c = '';
 	do {
-		$url .= "/$c" if length $c;
+		$url = add_path_to_url($url, $c);
 		eval {
 			my $ra = (ref $self)->new($url);
 			my $latest = $ra->get_latest_revnum;
diff --git a/perl/Git/SVN/Utils.pm b/perl/Git/SVN/Utils.pm
index ab7add5e8b..4bb4dde89a 100644
--- a/perl/Git/SVN/Utils.pm
+++ b/perl/Git/SVN/Utils.pm
@@ -13,6 +13,7 @@ our @EXPORT_OK = qw(
 	canonicalize_path
 	canonicalize_url
 	join_paths
+	add_path_to_url
 );
 
 
@@ -203,4 +204,30 @@ sub join_paths {
 	return $new_path .= "/$last_path";
 }
 
+
+=head3 add_path_to_url
+
+    my $new_url = add_path_to_url($url, $path);
+
+Appends $path onto the $url.  If $path is empty, $url is returned unchanged.
+
+=cut
+
+sub add_path_to_url {
+	my($url, $path) = @_;
+
+	return $url if !defined $path or !length $path;
+
+	# Strip trailing and leading slashes so we don't
+	# wind up with http://x.com///path
+	$url  =~ s{/+$}{};
+	$path =~ s{^/+}{};
+
+	# If a path has a % in it, URI escape it so it's not
+	# mistaken for a URI escape later.
+	$path =~ s{%}{%25}g;
+
+	return join '/', $url, $path;
+}
+
 1;