Implement :help

commands/help.go

@@ -0,0 +1,21 @@
+package commands
+
+import (
+	"errors"
+
+	"git.sr.ht/~sircmpwn/aerc/widgets"
+)
+
+func init() {
+	register("help", Help)
+}
+
+func Help(aerc *widgets.Aerc, args []string) error {
+	page := "aerc"
+	if len(args) == 2 {
+		page = "aerc-" + args[1]
+	} else if len(args) > 2 {
+		return errors.New("Usage: help [topic]")
+	}
+	return Term(aerc, []string{"term", "man", page})
+}