bump dependencies

vendor/github.com/jesseduffield/go-getter/folder_storage.go

@@ -0,0 +1,65 @@
+package getter
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// FolderStorage is an implementation of the Storage interface that manages
+// modules on the disk.
+type FolderStorage struct {
+	// StorageDir is the directory where the modules will be stored.
+	StorageDir string
+}
+
+// Dir implements Storage.Dir
+func (s *FolderStorage) Dir(key string) (d string, e bool, err error) {
+	d = s.dir(key)
+	_, err = os.Stat(d)
+	if err == nil {
+		// Directory exists
+		e = true
+		return
+	}
+	if os.IsNotExist(err) {
+		// Directory doesn't exist
+		d = ""
+		e = false
+		err = nil
+		return
+	}
+
+	// An error
+	d = ""
+	e = false
+	return
+}
+
+// Get implements Storage.Get
+func (s *FolderStorage) Get(key string, source string, update bool) error {
+	dir := s.dir(key)
+	if !update {
+		if _, err := os.Stat(dir); err == nil {
+			// If the directory already exists, then we're done since
+			// we're not updating.
+			return nil
+		} else if !os.IsNotExist(err) {
+			// If the error we got wasn't a file-not-exist error, then
+			// something went wrong and we should report it.
+			return fmt.Errorf("Error reading module directory: %s", err)
+		}
+	}
+
+	// Get the source. This always forces an update.
+	return Get(dir, source)
+}
+
+// dir returns the directory name internally that we'll use to map to
+// internally.
+func (s *FolderStorage) dir(key string) string {
+	sum := md5.Sum([]byte(key))
+	return filepath.Join(s.StorageDir, hex.EncodeToString(sum[:]))
+}