Add cli

cli/cli.go

@@ -0,0 +1,31 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"os"
+)
+
+func Cli() {
+	Args()
+	Flags()
+}
+
+func Args() {
+	fmt.Println("Program: ", os.Args[0])
+	fmt.Println("Args:", os.Args[1:])
+}
+
+func Flags() {
+	// NOTE: The flags must come before positional args or else these will take their default values
+	bookTypePtr := flag.String("booktype", "manga", "The type of book. Valid values are \"manga\", \"comic\", \"fiction\", \"non-fiction\".")
+	pagesPtr := flag.Uint64("pages", 0, "Number of pages in the book.")
+	var coverPath string
+	flag.StringVar(&coverPath, "cover", "", "Path to the cover image of the book.")
+
+	flag.Parse()
+
+	fmt.Println("Book type:", *bookTypePtr)
+	fmt.Println("# of Pages:", *pagesPtr)
+	fmt.Println("Cover path:", coverPath)
+}