pixiecore/cli: add secret debug command to dump builtin ipxe binaries.

The overall debug command is hidden from the CLI, since it should only
be useful when developing.

pixiecore/cli/debugcmd.go

@@ -0,0 +1,49 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cli
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	debugCmd = &cobra.Command{
+		Use:    "debug",
+		Short:  "Internal debugging commands",
+		Hidden: true,
+	}
+	dumpIpxeCmd = &cobra.Command{
+		Use:   "dump-ipxe",
+		Short: "Dump the builtin ipxe binaries to disk",
+		Run: func(cmd *cobra.Command, args []string) {
+			for fwtype, bs := range Ipxe {
+				path := fmt.Sprintf("builtin-ipxe-%d", fwtype)
+				if err := ioutil.WriteFile(path, bs, 0644); err != nil {
+					fmt.Printf("Error writing %s: %s\n", path, err)
+				} else {
+					fmt.Println("Wrote", path)
+				}
+			}
+		},
+	}
+)
+
+func init() {
+	debugCmd.AddCommand(dumpIpxeCmd)
+	rootCmd.AddCommand(debugCmd)
+}