1 files changed, 107 insertions, 0 deletions
diff --git a/resources/internal/resourcepaths.go b/resources/internal/resourcepaths.go
new file mode 100644
index 000000000..21c65e2ca
--- /dev/null
+++ b/resources/internal/resourcepaths.go
@@ -0,0 +1,107 @@
+// Copyright 2024 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 internal
+
+import (
+	"path"
+	"path/filepath"
+	"strings"
+
+	"github.com/gohugoio/hugo/common/paths"
+)
+
+// ResourcePaths holds path information for a resouce.
+// All directories in here have Unix-style slashes, with leading slash, but no trailing slash.
+// Empty directories are represented with an empty string.
+type ResourcePaths struct {
+	// This is the directory component for the target file or link.
+	Dir string
+
+	// Any base directory for the target file. Will be prepended to Dir.
+	BaseDirTarget string
+
+	// This is the directory component for the link will be prepended to Dir.
+	BaseDirLink string
+
+	// Set when publishing in a multihost setup.
+	TargetBasePaths []string
+
+	// This is the File component, e.g. "data.json".
+	File string
+}
+
+func (d ResourcePaths) join(p ...string) string {
+	var s string
+	for i, pp := range p {
+		if pp == "" {
+			continue
+		}
+		if i > 0 && !strings.HasPrefix(pp, "/") {
+			pp = "/" + pp
+		}
+		s += pp
+
+	}
+	if !strings.HasPrefix(s, "/") {
+		s = "/" + s
+	}
+	return s
+}
+
+func (d ResourcePaths) TargetLink() string {
+	return d.join(d.BaseDirLink, d.Dir, d.File)
+}
+
+func (d ResourcePaths) TargetPath() string {
+	return d.join(d.BaseDirTarget, d.Dir, d.File)
+}
+
+func (d ResourcePaths) Path() string {
+	return d.join(d.Dir, d.File)
+}
+
+func (d ResourcePaths) TargetPaths() []string {
+	if len(d.TargetBasePaths) == 0 {
+		return []string{d.TargetPath()}
+	}
+
+	var paths []string
+	for _, p := range d.TargetBasePaths {
+		paths = append(paths, p+d.TargetPath())
+	}
+	return paths
+}
+
+func (d ResourcePaths) TargetFilenames() []string {
+	filenames := d.TargetPaths()
+	for i, p := range filenames {
+		filenames[i] = filepath.FromSlash(p)
+	}
+	return filenames
+}
+
+func (d ResourcePaths) FromTargetPath(targetPath string) ResourcePaths {
+	targetPath = filepath.ToSlash(targetPath)
+	dir, file := path.Split(targetPath)
+	dir = paths.ToSlashPreserveLeading(dir)
+	if dir == "/" {
+		dir = ""
+	}
+	d.Dir = dir
+	d.File = file
+	d.BaseDirLink = ""
+	d.BaseDirTarget = ""
+
+	return d
+}