Fixes #33

Also mentioned at (https://github.com/aditya-K2/gomp/issues/1#issuecomment-1205090265)

`~` is not expanded to home directory, Hence adding an internal check
for the same.

config/config.go

@@ -29,15 +29,23 @@ var (
 )
 
 func ReadConfig() {
+
 	for k, v := range defaults {
 		viper.SetDefault(k, v)
 	}
+
 	viper.SetConfigName("config")
 	viper.AddConfigPath(HOME_DIR + "/.config/gomp")
+
 	err := viper.ReadInConfig()
 	if err != nil {
 		fmt.Println("Could Not Read Config file.")
 	}
+
+	// Expanding ~ to the User's Home Directory
+	viper.Set("MUSIC_DIRECTORY", utils.ExpandHomeDir(viper.GetString("MUSIC_DIRECTORY")))
+	viper.Set("DEFAULT_IMAGE_PATH", utils.ExpandHomeDir(viper.GetString("DEFAULT_IMAGE_PATH")))
+	viper.Set("CACHE_DIR", utils.ExpandHomeDir(viper.GetString("CACHE_DIR")))
 }
 
 func GenerateKeyMap(funcMap map[string]func()) {

utils/utils.go

@@ -2,6 +2,8 @@ package utils
 
 import (
 	"io/ioutil"
+	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"syscall"
@@ -117,6 +119,17 @@ func CheckDirectoryFmt(path string) string {
 	}
 }
 
+func ExpandHomeDir(path string) string {
+	HOME_DIR, _ := os.UserHomeDir()
+	if strings.HasPrefix(path, "~/") {
+		return filepath.Join(HOME_DIR, path[1:])
+	} else if path == "~" {
+		return HOME_DIR
+	} else {
+		return path
+	}
+}
+
 func GetMatchedString(a []int, s, color string) string {
 	// The Matches are sorted so we just have to traverse the Matches and if the two adjacent matches are not consecutive
 	// then we append the color string at the start + offset and the nulcol ( reset ) at end + offset + 1 and then reset