1 files changed, 54 insertions, 0 deletions
diff --git a/common/hugio/readers.go b/common/hugio/readers.go
new file mode 100644
index 000000000..8c901dd24
--- /dev/null
+++ b/common/hugio/readers.go
@@ -0,0 +1,54 @@
+// Copyright 2019 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hugio
+
+import (
+	"io"
+	"strings"
+)
+
+// ReadSeeker wraps io.Reader and io.Seeker.
+type ReadSeeker interface {
+	io.Reader
+	io.Seeker
+}
+
+// ReadSeekCloser is implemented by afero.File. We use this as the common type for
+// content in Resource objects, even for strings.
+type ReadSeekCloser interface {
+	ReadSeeker
+	io.Closer
+}
+
+// ReadSeekerNoOpCloser implements ReadSeekCloser by doing nothing in Close.
+// TODO(bep) rename this and simila to ReadSeekerNopCloser, naming used in stdlib, which kind of makes sense.
+type ReadSeekerNoOpCloser struct {
+	ReadSeeker
+}
+
+// Close does nothing.
+func (r ReadSeekerNoOpCloser) Close() error {
+	return nil
+}
+
+// NewReadSeekerNoOpCloser creates a new ReadSeekerNoOpCloser with the given ReadSeeker.
+func NewReadSeekerNoOpCloser(r ReadSeeker) ReadSeekerNoOpCloser {
+	return ReadSeekerNoOpCloser{r}
+}
+
+// NewReadSeekerNoOpCloserFromString uses strings.NewReader to create a new ReadSeekerNoOpCloser
+// from the given string.
+func NewReadSeekerNoOpCloserFromString(content string) ReadSeekerNoOpCloser {
+	return ReadSeekerNoOpCloser{strings.NewReader(content)}
+}