Updated readme

README.md

@@ -14,8 +14,11 @@ go build .
 ## Running instructions
 
 ```bash
-% ./gordle --help                                                                                                                                                              
+% ./gordle --help
+
 Usage of ./gordle:
+  -f string
+        Path to dictionary file with words of length -n. If specified, -n must be specified too (if the latter must not be equal to default value (default "./dictionary/5.txt")
   -n int
         Word size (default 5)
 ```
@@ -28,4 +31,4 @@ go test # [-cover]
 
 ## Dictionaries
 
-To run game you also need dictionary files. By default gordle searches for them in `./dictionary/<n>.txt` file, where `<n>` - number of characters, specified by `-n` flag
+To run game you also need dictionary files. By default gordle searches for them in `./dictionary/<n>.txt` file, where `<n>` - number of characters, specified by `-n` flag. If want to use custom one, provide in `-f` flag path to txt file with strings separated by new line characters

gordle.go

@@ -26,13 +26,17 @@ func main() {
 	containsOutput := color.New(color.BgYellow, color.FgBlack)
 	wrongOutput := color.New(color.BgWhite, color.FgBlack)
 
-	var nFlag = flag.Int("n", 5, "Word size")
+	nFlag := flag.Int("n", 5, "Word size")
+	fFlag := flag.String("f", "./dictionary/5.txt", "Path to dictionary file with words of length -n. If specified, -n must be specified too (if the latter must not be equal to default value")
+
 	flag.Parse()
-	nChar := *nFlag
 
 	fmt.Println("Welcome to Gordle - go implementation of Wordle game")
 
-	file, err := os.Open(fmt.Sprintf("./dictionary/%d.txt", nChar))
+	nChar := *nFlag
+	filePath := *fFlag
+
+	file, err := os.Open(filePath)
 
 	if err != nil {
 		log.Fatal("There is no dictionary with such amount of letters")
@@ -48,6 +52,10 @@ func main() {
 		words = append(words, scanner.Text())
 	}
 
+	if len(words[0]) != nChar {
+		log.Fatal("Words in dictionary must be of size", nChar)
+	}
+
 	fmt.Printf("You are going to guess a %d letter word in %d tries from %d dictionary\n", nChar, nChar+1, len(words))
 
 	rand.Seed(time.Now().Unix())