feat(commander): add function to return all commanders (closes #266)

api.go

@@ -701,7 +701,7 @@ func hlwhich(t *rt.Thread, c *rt.GoCont) (rt.Cont, error) {
 	cmd := strings.Split(alias, " ")[0]
 
 	// check for commander
-	if commands[cmd] != nil {
+	if cmds.Commands[cmd] != nil {
 		// they dont resolve to a path, so just send the cmd
 		return c.PushingNext1(t.Runtime, rt.StringValue(cmd)), nil
 	}

complete.go

@@ -128,7 +128,7 @@ func binaryComplete(query, ctx string, fields []string) ([]string, string) {
 	}
 
 	// add lua registered commands to completions
-	for cmdName := range commands {
+	for cmdName := range cmds.Commands {
 		if strings.HasPrefix(cmdName, query) {
 			completions = append(completions, cmdName)
 		}

exec.go

@@ -342,7 +342,7 @@ func execHandle(bg bool) interp.ExecHandlerFunc {
 		}
 
 		hc := interp.HandlerCtx(ctx)
-		if commands[args[0]] != nil {
+		if cmd := cmds.Commands[args[0]]; cmd != nil {
 			stdin := newSinkInput(hc.Stdin)
 			stdout := newSinkOutput(hc.Stdout)
 			stderr := newSinkOutput(hc.Stderr)
@@ -353,7 +353,7 @@ func execHandle(bg bool) interp.ExecHandlerFunc {
 			sinks.Set(rt.StringValue("out"), rt.UserDataValue(stdout.ud))
 			sinks.Set(rt.StringValue("err"), rt.UserDataValue(stderr.ud))
 
-			luaexitcode, err := rt.Call1(l.MainThread(), rt.FunctionValue(commands[args[0]]), rt.TableValue(luacmdArgs), rt.TableValue(sinks))
+			luaexitcode, err := rt.Call1(l.MainThread(), rt.FunctionValue(cmd), rt.TableValue(luacmdArgs), rt.TableValue(sinks))
 			if err != nil {
 				fmt.Fprintln(os.Stderr, "Error in command:\n" + err.Error())
 				return interp.NewExitStatus(1)
@@ -365,7 +365,7 @@ func execHandle(bg bool) interp.ExecHandlerFunc {
 				exitcode = uint8(code)
 			} else if luaexitcode != rt.NilValue {
 				// deregister commander
-				delete(commands, args[0])
+				delete(cmds.Commands, args[0])
 				fmt.Fprintf(os.Stderr, "Commander did not return number for exit code. %s, you're fired.\n", args[0])
 			}
 

golibs/commander/commander.go

@@ -43,11 +43,13 @@ import (
 type Commander struct{
 	Events *bait.Bait
 	Loader packagelib.Loader
+	Commands map[string]*rt.Closure
 }
 
-func New(rtm *rt.Runtime) Commander {
-	c := Commander{
+func New(rtm *rt.Runtime) *Commander {
+	c := &Commander{
 		Events: bait.New(rtm),
+		Commands: make(map[string]*rt.Closure),
 	}
 	c.Loader = packagelib.Loader{
 		Load: c.loaderFunc,
@@ -61,6 +63,7 @@ func (c *Commander) loaderFunc(rtm *rt.Runtime) (rt.Value, func()) {
 	exports := map[string]util.LuaExport{
 		"register": util.LuaExport{c.cregister, 2, false},
 		"deregister": util.LuaExport{c.cderegister, 1, false},
+		"registry": util.LuaExport{c.cregistry, 0, false},
 	}
 	mod := rt.NewTable()
 	util.SetExports(rtm, mod, exports)
@@ -91,7 +94,7 @@ func (c *Commander) cregister(t *rt.Thread, ct *rt.GoCont) (rt.Cont, error) {
 		return nil, err
 	}
 
-	c.Events.Emit("commandRegister", cmdName, cmd)
+	c.Commands[cmdName] = cmd
 
 	return ct.Next(), err
 }
@@ -108,7 +111,23 @@ func (c *Commander) cderegister(t *rt.Thread, ct *rt.GoCont) (rt.Cont, error) {
 		return nil, err
 	}
 
-	c.Events.Emit("commandDeregister", cmdName)
+	delete(c.Commands, cmdName)
 
 	return ct.Next(), err
 }
+
+// registry() -> table
+// Returns all registered commanders. Returns a list of tables with the following keys:
+// - `exec`: The function used to run the commander. Commanders require args and sinks to be passed.
+// #returns table
+func (c *Commander) cregistry(t *rt.Thread, ct *rt.GoCont) (rt.Cont, error) {
+	registryLua := rt.NewTable()
+	for cmdName, cmd := range c.Commands {
+		cmdTbl := rt.NewTable()
+		cmdTbl.Set(rt.StringValue("exec"), rt.FunctionValue(cmd))
+
+		registryLua.Set(rt.StringValue(cmdName), rt.TableValue(cmdTbl))
+	}
+
+	return ct.PushingNext1(t.Runtime, rt.TableValue(registryLua)), nil
+}

lua.go

@@ -33,19 +33,7 @@ func luaInit() {
 	lib.LoadLibs(l, fs.Loader)
 	lib.LoadLibs(l, terminal.Loader)
 
-	cmds := commander.New(l)
-	// When a command from Lua is added, register it for use
-	cmds.Events.On("commandRegister", func(args ...interface{}) {
-		cmdName := args[0].(string)
-		cmd := args[1].(*rt.Closure)
-
-		commands[cmdName] = cmd
-	})
-	cmds.Events.On("commandDeregister", func(args ...interface{}) {
-		cmdName := args[0].(string)
-
-		delete(commands, cmdName)
-	})
+	cmds = commander.New(l)
 	lib.LoadLibs(l, cmds.Loader)
 
 	hooks = bait.New(l)

main.go

@@ -14,6 +14,7 @@ import (
 
 	"hilbish/util"
 	"hilbish/golibs/bait"
+	"hilbish/golibs/commander"
 
 	rt "github.com/arnodel/golua/runtime"
 	"github.com/pborman/getopt"
@@ -25,7 +26,6 @@ var (
 	l *rt.Runtime
 	lr *lineReader
 
-	commands = map[string]*rt.Closure{}
 	luaCompletions = map[string]*rt.Closure{}
 
 	confDir string
@@ -33,6 +33,7 @@ var (
 	curuser *user.User
 
 	hooks *bait.Bait
+	cmds *commander.Commander
 	defaultConfPath string
 	defaultHistPath string
 )