Build tags for modules

config.go

@@ -37,7 +37,7 @@ func readConfig(dest string) {
 		if strings.HasSuffix(line, "{") {
 			option := strings.TrimSuffix(strings.TrimSpace(line), "{")
 			option = strings.TrimSpace(option)
-			module, command := modules.GetCommand(option)
+			module, command := modules.GetCommand(option, modules.Config)
 			var lines = make([]string, 0)
 			if module != nil {
 				for {

main.go

@@ -5,9 +5,13 @@ import (
 	"os"
 	"os/signal"
 	"pndpd/modules"
-	_ "pndpd/modules/userInterface"
 	"syscall"
 )
+import (
+	// Modules
+	_ "pndpd/modules/example"
+	_ "pndpd/modules/userInterface"
+)
 
 // waitForSignal Waits (blocking) for the program to be interrupted by the OS
 func waitForSignal() {
@@ -29,7 +33,7 @@ func main() {
 	case "config":
 		readConfig(os.Args[2])
 	default:
-		module, command := modules.GetCommand(os.Args[1])
+		module, command := modules.GetCommand(os.Args[1], modules.CommandLine)
 		if module != nil {
 			modules.ExecuteInit(module, modules.CallbackInfo{
 				CallbackType: modules.CommandLine,
@@ -54,7 +58,9 @@ func printUsage() {
 	fmt.Println("pndpd config <path to file>")
 	for i := range modules.ModuleList {
 		for d := range (*modules.ModuleList[i]).Commands {
-			fmt.Println("pndpd", (*modules.ModuleList[i]).Commands[d].Description)
+			if (*modules.ModuleList[i]).Commands[d].CommandLineEnabled {
+				fmt.Println("pndpd", (*modules.ModuleList[i]).Commands[d].Description)
+			}
 		}
 	}
 }

modules/example/example.go

@@ -1,3 +1,6 @@
+//go:build mod_example
+// +build mod_example
+
 package example
 
 import (
@@ -5,16 +8,20 @@ import (
 	"pndpd/modules"
 )
 
-// This is an example module that is not imported by the main program
+// This is an example module
 func init() {
 	commands := []modules.Command{{
-		CommandText:    "command1",
-		Description:    "This is the usage description for command1",
-		BlockTerminate: true,
+		CommandText:        "command1",
+		Description:        "This is the usage description for command1",
+		BlockTerminate:     true,
+		CommandLineEnabled: true,
+		ConfigEnabled:      true,
 	}, {
-		CommandText:    "command2",
-		Description:    "This is the usage description for command2",
-		BlockTerminate: false,
+		CommandText:        "command2",
+		Description:        "This is the usage description for command2",
+		BlockTerminate:     false,
+		CommandLineEnabled: false,
+		ConfigEnabled:      true,
 	},
 	}
 	modules.RegisterModule("Example", commands, initCallback, completeCallback, shutdownCallback)

modules/example/module.go

@@ -0,0 +1 @@
+package example

modules/modules.go

@@ -11,9 +11,11 @@ type Module struct {
 }
 
 type Command struct {
-	CommandText    string
-	Description    string
-	BlockTerminate bool
+	CommandText        string
+	Description        string
+	BlockTerminate     bool
+	CommandLineEnabled bool
+	ConfigEnabled      bool
 }
 
 type CallbackType int
@@ -39,11 +41,17 @@ func RegisterModule(name string, commands []Command, initCallback func(CallbackI
 	})
 }
 
-func GetCommand(target string) (*Module, Command) {
+func GetCommand(target string, scope CallbackType) (*Module, Command) {
 	for i := range ModuleList {
 		for _, command := range ModuleList[i].Commands {
 			if command.CommandText == target {
-				return ModuleList[i], command
+				if scope == CommandLine && command.CommandLineEnabled {
+					return ModuleList[i], command
+				}
+				if scope == Config && command.ConfigEnabled {
+					return ModuleList[i], command
+				}
+				return nil, Command{}
 			}
 		}
 	}

modules/userInterface/module.go

@@ -0,0 +1 @@
+package userInterface

modules/userInterface/userInterface.go

@@ -1,3 +1,6 @@
+//go:build !noUserInterface
+// +build !noUserInterface
+
 package userInterface
 
 import (
@@ -9,17 +12,23 @@ import (
 
 func init() {
 	commands := []modules.Command{{
-		CommandText:    "proxy",
-		Description:    "proxy <interface1> <interface2> <optional whitelist of CIDRs separated by a semicolon applied to interface2>",
-		BlockTerminate: true,
+		CommandText:        "proxy",
+		Description:        "proxy <interface1> <interface2> <optional whitelist of CIDRs separated by a semicolon applied to interface2>",
+		BlockTerminate:     true,
+		ConfigEnabled:      true,
+		CommandLineEnabled: true,
 	}, {
-		CommandText:    "responder",
-		Description:    "responder <interface> <optional whitelist of CIDRs separated by a semicolon>",
-		BlockTerminate: true,
+		CommandText:        "responder",
+		Description:        "responder <interface> <optional whitelist of CIDRs separated by a semicolon>",
+		BlockTerminate:     true,
+		ConfigEnabled:      true,
+		CommandLineEnabled: true,
 	}, {
-		CommandText:    "modules",
-		Description:    "modules available - list available modules",
-		BlockTerminate: false,
+		CommandText:        "modules",
+		Description:        "modules available - list available modules",
+		BlockTerminate:     false,
+		ConfigEnabled:      false,
+		CommandLineEnabled: true,
 	}}
 	modules.RegisterModule("Core", commands, initCallback, completeCallback, shutdownCallback)
 }