Switch to getopt library from flag library for flag parsing.

go.mod

@@ -3,3 +3,5 @@ module codeberg.org/flpolyaplus/aplus
 go 1.21.3
 
 require golang.org/x/net v0.18.0
+
+require github.com/pborman/getopt v1.1.0 // indirect

go.sum

@@ -1,2 +1,4 @@
+github.com/pborman/getopt v1.1.0 h1:eJ3aFZroQqq0bWmraivjQNt6Dmm5M0h2JcDW38/Azb0=
+github.com/pborman/getopt v1.1.0/go.mod h1:FxXoW1Re00sQG/+KIkuSqRL/LwQgSkv7uyac+STFsbk=
 golang.org/x/net v0.18.0 h1:mIYleuAkSbHh0tCv7RvjL3F6ZVbLjq4+R7zbOn3Kokg=
 golang.org/x/net v0.18.0/go.mod h1:/czyP5RqHAH4odGYxBJ1qz0+CE5WZ+2j1YgoEo8F2jQ=

main.go

@@ -1,9 +1,11 @@
 package main
 
 import (
-	"flag"
 	"fmt"
 	"net/http"
+	"os"
+
+	"github.com/pborman/getopt"
 )
 
 var base_link string
@@ -15,12 +17,18 @@ var client http.Client
 func main() {
 	initialize()
 
-	code := flag.String("code", "", "Code to enter")
-	course := flag.Int("course", -1, "Canvas course number")
-	list_all := flag.Bool("list-all", false, "List all courses")
-	list_favorites := flag.Bool("list-favorites", false, "List favorite courses")
+	code := getopt.StringLong("code", 'c', "", "Code to enter")
+	course := getopt.IntLong("course", 'C', -1, "Canvas course number")
+	list_all := getopt.BoolLong("list-all", 0, "List all courses")
+	list_favorites := getopt.BoolLong("list-favorites", 0, "List favorite courses")
+	help := getopt.BoolLong("help", 0, "Help")
 
-	flag.Parse()
+	getopt.Parse()
+
+	if *help {
+		getopt.Usage()
+		os.Exit(0)
+	}
 
 	if *list_all {
 		list_all_courses()
@@ -34,6 +42,4 @@ func main() {
 		fmt.Printf("%d %s", *course, *code)
 		submit_code(*course, *code)
 	}
-
-	submit_code(7329, "asdkl")
 }