Initial import.

cps/help.go

@@ -0,0 +1,22 @@
+package cps
+
+import (
+	"sort"
+	"strings"
+)
+
+func init() {
+	Register("help", helpHandler)
+}
+
+func helpHandler(cmd *Command) (*Response, error) {
+	knownCommands := make([]string, 0, len(registry))
+	for command := range registry {
+		knownCommands = append(knownCommands, command)
+	}
+
+	sort.Strings(knownCommands)
+	return &Response{
+		Message: strings.Join(knownCommands, ", "),
+	}, nil
+}