Fix for short symlinks (#115)

Signed-off-by: Tris Forster <[email protected]>

Author: tf198

tests/repos/repo1_bare/objects/2e/65efe2a145dda7ee51d1741299f848e5bf752e

@@ -0,0 +1 @@
+x
��KN1Y��#��3	!�p.���L��J����,k����}5�Pl�B�5sK�H|>�d�K�Kl	k�%���S7�ܛ�e�Ӣ�c�Ή���H��Se�~�uLx��oc����e���:D�7�Ә�g���_B�=":�����S�^ET����u�p?�6M^

tests/repos/repo1_bare/objects/37/991dec2c8e592043f47155ce4808d4580f9123

@@ -1 +1 @@
-6fbd69e9823458e6c4a2fc5c0f6bc022b2f2acd1
+37991dec2c8e592043f47155ce4808d4580f9123

tests/repos/repo1_bare/objects/b1/fc9917b618c924cf4aa421dae74e8bf9b556d3

@@ -112,7 +112,7 @@ func (te *TreeEntry) FollowLink() (*TreeEntry, error) {
 	t := te.ptree
 
 	// traverse up directories
-	for ; t != nil && lnk[:3] == "../"; lnk = lnk[3:] {
+	for ; t != nil && strings.HasPrefix(lnk, "../"); lnk = lnk[3:] {
 		t = t.ptree
 	}
 

tests/repos/repo1_bare/objects/f1/a6cb52b2d16773290cefe49ad0684b50a4f930

@@ -55,7 +55,7 @@ func TestFollowLink(t *testing.T) {
 	r, err := OpenRepository("tests/repos/repo1_bare")
 	assert.NoError(t, err)
 
-	commit, err := r.GetCommit("6fbd69e9823458e6c4a2fc5c0f6bc022b2f2acd1")
+	commit, err := r.GetCommit("37991dec2c8e592043f47155ce4808d4580f9123")
 	assert.NoError(t, err)
 
 	// get the symlink
@@ -89,4 +89,10 @@ func TestFollowLink(t *testing.T) {
 	assert.True(t, target.IsLink())
 	_, err = target.FollowLink()
 	assert.Equal(t, err.Error(), "outside_repo: points outside of repo")
+
+	// testing fix for short link bug
+	target, err = commit.Tree.GetTreeEntryByPath("foo/link_short")
+	assert.NoError(t, err)
+	_, err = target.FollowLink()
+	assert.Equal(t, err.Error(), "link_short: broken link")
 }