pixiecore/cli: pass Ipxe firmwares as a package global.

The cli package is meant for single-shot execution anyway, so
instead of plumbing everything through reentrantly, let's just
have a global you can seed before calling CLI().

cmd/pixiecore-apache2/main.go

@@ -17,5 +17,5 @@ package main
 import "go.universe.tf/netboot/pixiecore/cli"
 
 func main() {
-	cli.CLI(nil)
+	cli.CLI()
 }

cmd/pixiecore/main.go

@@ -21,13 +21,8 @@ import (
 )
 
 func main() {
-	pxe := ipxe.MustAsset("undionly.kpxe")
-	efi32 := ipxe.MustAsset("ipxe-i386.efi")
-	efi64 := ipxe.MustAsset("ipxe-x86_64.efi")
-
-	cli.CLI(map[pixiecore.Firmware][]byte{
-		pixiecore.FirmwareX86PC: pxe,
-		pixiecore.FirmwareEFI32: efi32,
-		pixiecore.FirmwareEFI64: efi64,
-	})
+	cli.Ipxe[pixiecore.FirmwareX86PC] = ipxe.MustAsset("undionly.kpxe")
+	cli.Ipxe[pixiecore.FirmwareEFI32] = ipxe.MustAsset("ipxe-i386.efi")
+	cli.Ipxe[pixiecore.FirmwareEFI64] = ipxe.MustAsset("ipxe-x86_64.efi")
+	cli.CLI()
 }

pixiecore/cli/bootcmd.go

@@ -50,7 +50,7 @@ var bootCmd = &cobra.Command{
 
 		s := &pixiecore.Server{
 			Booter: pixiecore.StaticBooter(spec),
-			Ipxe:   nil, // TODO
+			Ipxe:   Ipxe,
 			Log:    func(msg string) { fmt.Println(msg) },
 		}
 		fmt.Println(s.Serve())

pixiecore/cli/cli.go

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Package cli implements the commandline interface for Pixiecore.
 package cli
 
 import (
@@ -23,10 +24,16 @@ import (
 	"go.universe.tf/netboot/pixiecore"
 )
 
+// Ipxe is the set of ipxe binaries for supported firmwares.
+//
+// Can be set externally before calling CLI(), and set/extended by
+// commandline processing in CLI().
+var Ipxe = map[pixiecore.Firmware][]byte{}
+
 // CLI runs the Pixiecore commandline.
 //
 // Takes a map of ipxe bootloader binaries for various architectures.
-func CLI(ipxe map[pixiecore.Firmware][]byte) {
+func CLI() {
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Println(err)
 		os.Exit(-1)