fix: import cycle

internal/base/flag.go

@@ -11,7 +11,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/Mrs4s/go-cqhttp/global"
+	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
 	"gopkg.in/yaml.v3"
 
@@ -141,7 +141,8 @@ func ResetWorkingDir() {
 		}
 	}
 	p, _ := filepath.Abs(os.Args[0])
-	if !global.PathExists(p) {
+	_, err := os.Stat(p)
+	if !(err == nil || errors.Is(err, os.ErrExist)) {
 		log.Fatalf("重置工作目录时出现错误: 无法找到路径 %v", p)
 	}
 	proc := exec.Command(p, args...)
@@ -149,7 +150,7 @@ func ResetWorkingDir() {
 	proc.Stdout = os.Stdout
 	proc.Stderr = os.Stderr
 	proc.Dir = wd
-	err := proc.Run()
+	err = proc.Run()
 	if err != nil {
 		panic(err)
 	}