feat: basic structure

bootstrap/config.go

@@ -0,0 +1,72 @@
+package bootstrap
+
+import (
+	"github.com/alist-org/alist/v3/cmd/args"
+	"github.com/alist-org/alist/v3/conf"
+	"github.com/alist-org/alist/v3/pkg/utils"
+	"github.com/caarlos0/env/v6"
+	log "github.com/sirupsen/logrus"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+func InitConfig() {
+	log.Infof("reading config file: %s", args.Config)
+	if !utils.Exists(args.Config) {
+		log.Infof("config file not exists, creating default config file")
+		_, err := utils.CreatNestedFile(args.Config)
+		if err != nil {
+			log.Fatalf("failed to create config file")
+		}
+		conf.Conf = conf.DefaultConfig()
+		if !utils.WriteToJson(args.Config, conf.Conf) {
+			log.Fatalf("failed to create default config file")
+		}
+	} else {
+		configBytes, err := ioutil.ReadFile(args.Config)
+		if err != nil {
+			log.Fatalf("reading config file error:%s", err.Error())
+		}
+		conf.Conf = conf.DefaultConfig()
+		err = utils.Json.Unmarshal(configBytes, conf.Conf)
+		if err != nil {
+			log.Fatalf("load config error: %s", err.Error())
+		}
+		log.Debugf("config:%+v", conf.Conf)
+		// update config.json struct
+		confBody, err := utils.Json.MarshalIndent(conf.Conf, "", "  ")
+		if err != nil {
+			log.Fatalf("marshal config error:%s", err.Error())
+		}
+		err = ioutil.WriteFile(args.Config, confBody, 0777)
+		if err != nil {
+			log.Fatalf("update config struct error: %s", err.Error())
+		}
+	}
+	if !conf.Conf.Force {
+		confFromEnv()
+	}
+	err := os.RemoveAll(filepath.Join(conf.Conf.TempDir))
+	if err != nil {
+		log.Errorln("failed delete temp file:", err)
+	}
+	err = os.MkdirAll(conf.Conf.TempDir, 0700)
+	if err != nil {
+		log.Fatalf("create temp dir error: %s", err.Error())
+	}
+	log.Debugf("config: %+v", conf.Conf)
+}
+
+func confFromEnv() {
+	prefix := "ALIST_"
+	if args.NoPrefix {
+		prefix = ""
+	}
+	log.Infof("load config from env with prefix: %s", prefix)
+	if err := env.Parse(conf.Conf, env.Options{
+		Prefix: prefix,
+	}); err != nil {
+		log.Fatalf("load config from env error: %s", err.Error())
+	}
+}