Extract billy (#173)

* Extract billy

Billy is a new library directly extracted from go-git. It abstract
several storages systems in a filesystem interface.

More in github.com/src-d/billy

* Fix grouping in imports block

* Update billy to v1

* Re-remove fs_implementation example

1 files changed, 0 insertions, 37 deletions

diff --git a/utils/fs/os/os_test.go b/utils/fs/os/os_test.go
deleted file mode 100644
index 5e8f5c1..0000000
--- a/utils/fs/os/os_test.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package os_test
-
-import (
-	"io/ioutil"
-	stdos "os"
-	"path/filepath"
-	"testing"
-
-	. "gopkg.in/check.v1"
-	"gopkg.in/src-d/go-git.v4/utils/fs/os"
-	"gopkg.in/src-d/go-git.v4/utils/fs/test"
-)
-
-func Test(t *testing.T) { TestingT(t) }
-
-type OSSuite struct {
-	test.FilesystemSuite
-	path string
-}
-
-var _ = Suite(&OSSuite{})
-
-func (s *OSSuite) SetUpTest(c *C) {
-	s.path, _ = ioutil.TempDir(stdos.TempDir(), "go-git-os-fs-test")
-	s.FilesystemSuite.Fs = os.New(s.path)
-}
-func (s *OSSuite) TearDownTest(c *C) {
-	err := stdos.RemoveAll(s.path)
-	c.Assert(err, IsNil)
-}
-
-func (s *OSSuite) TestOpenDoesNotCreateDir(c *C) {
-	_, err := s.Fs.Open("dir/non-existent")
-	c.Assert(err, NotNil)
-	_, err = stdos.Stat(filepath.Join(s.path, "dir"))
-	c.Assert(stdos.IsNotExist(err), Equals, true)
-}