feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/infra/impl/dynconf/static/yaml.go

@@ -0,0 +1,92 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * 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 static
+
+import (
+	"errors"
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	"gopkg.in/yaml.v2"
+
+	"github.com/coze-dev/coze-studio/backend/infra/impl/dynconf/static/internal"
+)
+
+var (
+	ErrConfigNotExist = errors.New("config not exist")
+)
+
+type ConfYaml struct {
+	*internal.RawYaml
+	filepath string
+}
+
+func NewConfYaml(rootDir string, groups []string) (*ConfYaml, error) {
+	yamlFilePath := getYamlPath(rootDir, groups)
+	if yamlFilePath == "" {
+		return nil, ErrConfigNotExist
+	}
+
+	yaml, err := internal.NewRawYaml(yamlFilePath)
+	if err != nil {
+		return nil, err
+	}
+
+	r := &ConfYaml{RawYaml: yaml, filepath: yamlFilePath}
+
+	return r, err
+}
+
+func (c *ConfYaml) MarshalFunc() MarshalFunc {
+	return yaml.Marshal
+}
+
+func (c *ConfYaml) UnmarshalFunc() UnmarshalFunc {
+	return yaml.Unmarshal
+}
+
+func getYamlPath(rootDir string, groups []string) string {
+	var findPaths []string
+
+	for r := len(groups); r > 0; r-- {
+		findPaths = append(findPaths,
+			filepath.Join(rootDir, fmt.Sprintf("config.%s", strings.Join(groups[:r], "."))))
+	}
+
+	findPaths = append(findPaths, filepath.Join(rootDir, "config"))
+
+	for _, path := range findPaths {
+		if p, exist := existYamlFile(path); exist {
+			return p
+		}
+	}
+
+	return ""
+}
+
+func existYamlFile(yamlFileName string) (string, bool) {
+	for _, ext := range []string{".yml", ".yaml"} {
+		p := yamlFileName + ext
+		existed, isDir := internal.FileExist(p)
+		if existed && !isDir {
+			return p, true
+		}
+	}
+
+	return "", false
+}