Fix relative symlink paths (#293)

Author: jswidler

lib/core.js

@@ -495,8 +495,9 @@ Archiver.prototype._updateQueueTaskWithStats = function(task, stats) {
     task.source = new Buffer(0);
   } else if (stats.isSymbolicLink() && this._moduleSupports('symlink')) {
     var linkPath = fs.readlinkSync(task.filepath);
+    var dirName = path.dirname(task.filepath);
     task.data.type = 'symlink';
-    task.data.linkname = path.relative(path.dirname(task.filepath), path.resolve(linkPath));
+    task.data.linkname = path.relative(dirName, path.resolve(dirName, linkPath));
     task.data.sourceType = 'buffer';
     task.source = new Buffer(0);
   } else {

test/plugins.js

@@ -23,8 +23,8 @@ describe('plugins', function() {
     if (!win32) {
       fs.chmodSync('test/fixtures/executable.sh', 0777);
       fs.chmodSync('test/fixtures/directory/subdir/', 0755);
-      fs.symlinkSync('test/fixtures/directory/level0.txt', 'test/fixtures/directory/subdir/level0link.txt');
-      fs.symlinkSync('test/fixtures/directory/subdir/subsub/', 'test/fixtures/directory/subdir/subsublink');
+      fs.symlinkSync('../level0.txt', 'test/fixtures/directory/subdir/level0link.txt');
+      fs.symlinkSync('subsub/', 'test/fixtures/directory/subdir/subsublink');
     } else {
       fs.writeFileSync('test/fixtures/directory/subdir/level0link.txt', '../level0.txt');
       fs.writeFileSync('test/fixtures/directory/subdir/subsublink', 'subsub');