cache: use os.UserCacheDir

internal/cache/cache.go

@@ -8,7 +8,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
-	"os/user"
 	"strconv"
 	"strings"
 	"time"
@@ -41,15 +40,12 @@ func Load(file string, timeout time.Duration) (rawValues []common.RawValue, err
 	return
 }
 
-// TempDir creates a temporary folder for current user and returns the path
-func TempDir(name string) (dir string, err error) {
-	var u *user.User
-	if u, err = user.Current(); err == nil {
-		dir = fmt.Sprintf("%v/carapace", os.TempDir())
-		if err = os.MkdirAll(dir, 0777); err == nil {
-			dir = fmt.Sprintf("%v/%v/%v/%v", dir, u.Username, uid.Executable(), name)
-			err = os.MkdirAll(dir, 0700)
-		}
+// CacheDir creates a cache folder for current user and returns the path
+func CacheDir(name string) (dir string, err error) {
+	var userCacheDir string
+	if userCacheDir, err = os.UserCacheDir(); err == nil {
+		dir = fmt.Sprintf("%v/carapace/%v/%v", userCacheDir, uid.Executable(), name)
+		err = os.MkdirAll(dir, 0700)
 	}
 	return
 }
@@ -66,7 +62,7 @@ func File(callerFile string, callerLine int, keys ...cache.Key) (file string, er
 		}
 		ids = append(ids, id)
 	}
-	if dir, err := TempDir(uid); err == nil {
+	if dir, err := CacheDir(uid); err == nil {
 		file = dir + "/" + uidKeys(ids...)
 	}
 	return