Add support for CODEOWNERS

Fixes #9474

hugolib/codeowners.go

@@ -0,0 +1,69 @@
+// 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 hugolib
+
+import (
+	"io"
+	"os"
+	"path"
+
+	"github.com/gohugoio/hugo/config"
+	"github.com/gohugoio/hugo/resources/page"
+	"github.com/hairyhenderson/go-codeowners"
+	"github.com/spf13/afero"
+)
+
+var afs = afero.NewOsFs()
+
+func findCodeownersFile(dir string) (io.Reader, error) {
+	for _, p := range []string{".", "docs", ".github", ".gitlab"} {
+		f := path.Join(dir, p, "CODEOWNERS")
+
+		_, err := afs.Stat(f)
+		if err != nil {
+			if os.IsNotExist(err) {
+				continue
+			}
+			return nil, err
+		}
+
+		return afs.Open(f)
+	}
+
+	return nil, nil
+}
+
+type codeownerInfo struct {
+	owners *codeowners.Codeowners
+}
+
+func (c *codeownerInfo) forPage(p page.Page) []string {
+	return c.owners.Owners(p.File().Filename())
+}
+
+func newCodeowners(cfg config.Provider) (*codeownerInfo, error) {
+	workingDir := cfg.GetString("workingDir")
+
+	r, err := findCodeownersFile(workingDir)
+	if err != nil || r == nil {
+		return nil, err
+	}
+
+	owners, err := codeowners.FromReader(r, workingDir)
+	if err != nil {
+		return nil, err
+	}
+
+	return &codeownerInfo{owners: owners}, nil
+}