Adds help to the cli

main.go

@@ -64,8 +64,7 @@ func expandTilde(path string) string {
 }
 
 func displayUsage() {
-	fmt.Println("spacewalk [stuff] [things]")
+	fmt.Println("spacewalk \033[3mcommand\033[23m [\033[3moptions...\033[23m]\n\nAvailable commands:\n\tcreate\n\tupdate\n\tremove\n\tdelete\n\tadd\n\tshow\n\tlaunch\n\thelp")
-	os.Exit(0)
 }
 
 // parseArgs is the main entry point into scbm and will run the appropriate functions
@@ -74,6 +73,7 @@ func parseArgs() {
 	a := os.Args
 	if len(a) == 1 {
 		displayUsage()
+		os.Exit(0)
 	}
 
 	switch a[1] {
@@ -123,8 +123,17 @@ func parseArgs() {
 		} else {
 			earlyExit("Incorrect syntax.\n-   spacewalk show [\033[3mflight\033[0m]")
 		}
+	case "help":
+		if len(a) == 2 {
+			displayHelp("")
+		} else if len(a) == 3 {
+			displayHelp(a[2])
+		} else {
+			earlyExit("Incorrect syntax.\n-   spacewalk help [\033[3mcommand\033[0m]")
+		}
 	default:
-		earlyExit(fmt.Sprintf("Unknown command %q", a[1]))
+		displayUsage()
+		earlyExit(fmt.Sprintf("Unknown command %q.\nTry: `spacewalk help`", a[1]))
 	}
 }
 
@@ -342,6 +351,30 @@ func create(flight string) {
 	ff.Close()
 }
 
+func displayHelp(command string) {
+	switch command {
+	case "launch":
+		fmt.Println("Format: spacewalk launch [\033[3mflight\033[23m\n\nWhen run without a flight, spacewalk will launch all flights. When passed a flight it will just launch the given flight. A launch is defined as checking all of the remote pages for updates and generating a new version of the output file.")
+	case "create":
+		fmt.Println("Format: spacewalk create \033[3mflight\033[23m\n\nCreates a new flight with the given name. A flight can have capsules added to it, a header and footer assigned, and have it all launched to an output file.")
+	case "add":
+		fmt.Println("Format: spacewalk add \033[3mflight url title\033[23m\n\nAdds the given capsule url to the given flight. When the flight is launched, the given capsule will be named with the given title.")
+	case "remove":
+		fmt.Println("Format: spacewalk remove \033[3mflight\033[23m\n\nRemoves the given flight from the system. This is permanent and cannot be undone. Use with caution.")
+	case "delete":
+		fmt.Println("Format: spacewalk delete \033[3mflight title\033[23m\n\nRemoves the capsule with the given title from the given flight (remove just one capsule from a flight).")
+	case "show":
+		fmt.Println("Format: spacewalk show [\033[3mflight\033[23m]\n\nWhen run without a flight, will show basic information for all flights. If a flight is passed then detailed information, including a capsule list, will be shown.")
+	case "update":
+		fmt.Println("Format: spacewalk update \033[3mflight item value\033[23m\n\nWill update a flights manifest. Valid items:\n\tlaunch\n\theader\n\tfooter\n\nAll items take a filepath as their value.")
+	case "help":
+		fmt.Println("Format: spacewalk help \033[3mcommand\033[0m\n\nWill provide a brief detailed message about the given command. For more detailed information see the man page.")
+	default:
+		fmt.Println("Unknown command. Please run: spacewalk help \033[3mcommand\033[23m\nWhere \033[3mcommand\033[23m is any of the following:\n\tcreate\n\tlaunch\n\tadd\n\tremove\n\tdelete\n\tshow\n\tupdate\n\thelp")
+	}
+
+}
+
 func update(flight, item, value string) {
 	manifest := readManifest()
 	row := -1

spacewalk.1

@@ -62,6 +62,9 @@ When run without a flight name \f[B]show\f[] will show the manifest
 for each flight. When run with a flight name \f[B]show\f[] will show
 the manifest for the given flight as well as the log (list of sites)
 for that flight.
+.SS help [\f[I]command\f[]]
+.PP
+Will display basic help information for the given command.
 .SS launch [\f[I]flightname\f[]]
 .PP
 When run without a flight name \f[B]launch\f[] will launch all available