feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

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

@@ -0,0 +1,148 @@
+/*
+ * 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 (
+	"fmt"
+	"sync"
+)
+
+const (
+	defaultBase = "/deploy"
+)
+
+type Options struct {
+	absRepoRoot string // yaml文件root前缀的绝对路径
+	useJson     bool   // 需要bind json文件，不指定默认bind yaml
+	groups      []string
+}
+
+type OptFunc func(o *Options)
+
+// WithAbsRepoRoot 传入自定义指定读取绝对路径/xx下的config.<xx>.(yaml,json)，例如/opt/tiger/xxx
+func WithAbsRepoRoot(absRepoRoot string) OptFunc {
+	return func(o *Options) {
+		if len(absRepoRoot) > 0 {
+			o.absRepoRoot = absRepoRoot
+		}
+	}
+}
+
+// WithUseJSONType 需要查找xx.json结尾的文
+func WithUseJSONType(useJson bool) OptFunc {
+	return func(o *Options) {
+		o.useJson = useJson
+	}
+}
+
+func WithGroups(groups []string) OptFunc {
+	return func(o *Options) {
+		o.groups = groups
+	}
+}
+
+func loadOpts(opts ...OptFunc) *Options {
+	o := &Options{}
+	for _, opt := range opts {
+		opt(o)
+	}
+
+	return o
+}
+
+var configers sync.Map // key: abs path, value: configer
+
+// New 可传入local_config_dir指定读取自定义的绝对路径文件 `<local_config_dir>/config.<env>.<region>.<cluster>.yaml`
+func getOrCreateConf(opts ...OptFunc) (configer, error) {
+	options := loadOpts(opts...)
+	if options.absRepoRoot == "" {
+		options.absRepoRoot = defaultBase
+	}
+
+	keyFn := func(dir string, withJSON bool) string {
+		fileFmt := "yaml"
+		if withJSON {
+			fileFmt = "json"
+		}
+		return dir + "_" + fileFmt
+	}
+	dir := options.absRepoRoot
+	withJSON := options.useJson
+	key := keyFn(dir, withJSON)
+
+	val, exist := configers.Load(key)
+	if exist {
+		if conf, ok := val.(configer); ok {
+			return conf, nil
+		}
+	}
+
+	var (
+		cfg configer
+		err error
+	)
+
+	if withJSON {
+		cfg, err = NewConfJson(dir, options.groups)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		cfg, err = NewConfYaml(dir, options.groups) // 默认使用yaml
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	configers.Store(key, cfg)
+
+	return cfg, nil
+}
+
+// JSONBind 不传dir值，按默认路径，优先级读取/opt/tiger/flowdevops/confcenter/psm/p.s.m/config.<env>.<region>.<cluster>.json
+// 可使用WithAbsRepoRoot 传入自定义指定读取
+func JSONBind(structPtr interface{}, opts ...OptFunc) error {
+	opts = append(opts, WithUseJSONType(true))
+	conf, err := getOrCreateConf(opts...)
+	if err != nil {
+		return fmt.Errorf("find config failed: %w", err)
+	}
+	return bindAndValidate(structPtr, conf)
+}
+
+// YAMLBind 不传dir值，按默认路径，按优先级读取/opt/tiger/flowdevops/confcenter/psm/p.s.m/config.<env>.<region>.<cluster>.yaml
+// 可使用WithAbsRepoRoot 传入自定义指定读取
+func YAMLBind(structPtr interface{}, opts ...OptFunc) error {
+	conf, err := getOrCreateConf(opts...)
+	if err != nil {
+		return fmt.Errorf("find config failed: %w", err)
+	}
+	return bindAndValidate(structPtr, conf)
+}
+
+type MarshalFunc func(data interface{}) ([]byte, error)
+type UnmarshalFunc func(data []byte, v interface{}) error
+
+type configer interface {
+	GetBytes() []byte
+	MarshalFunc() MarshalFunc
+	UnmarshalFunc() UnmarshalFunc
+}
+
+func bindAndValidate(structPtr interface{}, cnf configer) error {
+	return cnf.UnmarshalFunc()(cnf.GetBytes(), structPtr)
+}