Add resources.Match and resources.GetMatch

Fix #6190

1 files changed, 85 insertions, 0 deletions

diff --git a/hugofs/glob.go b/hugofs/glob.go
new file mode 100644
index 000000000..e4115ea7c
--- /dev/null
+++ b/hugofs/glob.go
@@ -0,0 +1,85 @@
+// 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 hugofs
+
+import (
+	"errors"
+	"path/filepath"
+	"strings"
+
+	"github.com/gohugoio/hugo/hugofs/glob"
+
+	"github.com/spf13/afero"
+)
+
+// Glob walks the fs and passes all matches to the handle func.
+// The handle func can return true to signal a stop.
+func Glob(fs afero.Fs, pattern string, handle func(fi FileMetaInfo) (bool, error)) error {
+	pattern = glob.NormalizePath(pattern)
+	if pattern == "" {
+		return nil
+	}
+
+	g, err := glob.GetGlob(pattern)
+	if err != nil {
+		return nil
+	}
+
+	hasSuperAsterisk := strings.Contains(pattern, "**")
+	levels := strings.Count(pattern, "/")
+	root := glob.ResolveRootDir(pattern)
+
+	// Signals that we're done.
+	done := errors.New("done")
+
+	wfn := func(p string, info FileMetaInfo, err error) error {
+		p = glob.NormalizePath(p)
+		if info.IsDir() {
+			if !hasSuperAsterisk {
+				// Avoid walking to the bottom if we can avoid it.
+				if p != "" && strings.Count(p, "/") >= levels {
+					return filepath.SkipDir
+				}
+			}
+			return nil
+		}
+
+		if g.Match(p) {
+			d, err := handle(info)
+			if err != nil {
+				return err
+			}
+			if d {
+				return done
+			}
+		}
+
+		return nil
+	}
+
+	w := NewWalkway(WalkwayConfig{
+		Root:   root,
+		Fs:     fs,
+		WalkFn: wfn,
+	})
+
+	err = w.Walk()
+
+	if err != done {
+		return err
+	}
+
+	return nil
+
+}