1 files changed, 32 insertions, 0 deletions
diff --git a/help.go b/help.go
new file mode 100644
index 0000000..b14471c
--- /dev/null
+++ b/help.go
@@ -0,0 +1,32 @@
+package goctl
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+)
+
+type cmdHelp struct{}
+
+func (cmd cmdHelp) Name() string {
+	return "help"
+}
+
+func (cmd cmdHelp) Help() string {
+	return "show this message"
+}
+
+func (cmd cmdHelp) Run(gc *Goctl, args []string) string {
+	rc := []string{"Available commands:", ""}
+	cmds := []string{}
+	for _, h := range gc.handlers {
+		cmds = append(cmds, fmt.Sprintf("\t%s\t%s", h.Name(), h.Help()))
+	}
+	sort.Strings(cmds)
+	rc = append(rc, cmds...)
+	return strings.Join(rc, "\n")
+}
+
+func init() {
+	builtinHandlers = append(builtinHandlers, cmdHelp{})
+}