Add possibility to run without display

lib/virtual-machine.rb

@@ -129,4 +129,4 @@ module VirtualMachine
             # f.write("\0")
         end
     end
-end
+end

lib/vm/qemu.rb

@@ -1,6 +1,20 @@
 require "fileutils"
 require "ostruct"
 
+module DisplayMode
+  def self.none
+    0
+  end
+
+  def self.fullscreen
+    1
+  end
+
+  def self.window
+    2
+  end
+end
+
 module Qemu 
   def self.qemu_bin_for(arch)
     {
@@ -69,10 +83,15 @@ module Qemu
       detach: true,
       ram: 2048,
       cpus: 1,
-      fullscreen: true
+      display: DisplayMode::none
     }
+
+    # for testing only
+    defaults[:detach] = false
+    defaults[:display] = DisplayMode.window
+
     opts = defaults.merge(options)
-    
+    puts options 
     puts opts
 
     qemu = qemu_bin_for(arch)
@@ -82,22 +101,31 @@ module Qemu
       # args += ["-bios", "/opt/homebrew/share/qemu/edk2-aarch64-code.fd"]
       args += ["-drive", "if=pflash,format=raw,unit=0,readonly=on,file=/opt/homebrew/share/qemu/edk2-aarch64-code.fd"]
 
-      #args += ["-device", "virtio-gpu-device"]
-      if opts[:fullscreen] 
-        args += ["-display", "cocoa,full-screen=on"]
+      if opts[:display] == DisplayMode::none
+        port = 2222
+        args += ['-nographic'] 
+        args += ['-netdev', "user,id=net0,hostfwd=tcp:127.0.0.1:#{port}-:22"]
+        #args += ['-device', 'e1000,netdev=net0']
+        args += ['-device', 'virtio-net-pci,netdev=net0']
+        puts "ssh -p #{port} user@localhost"
+
       else
-        args += ["-display", "cocoa"]
+        #args += ["-device", "virtio-gpu-device"]
+        if opts[:display] == DisplayMode::fullscreen 
+          args += ["-display", "cocoa,full-screen=on"]
+        else
+          args += ["-display", "cocoa"]
+        end
+
+        args += ["-device", "qemu-xhci,id=xhci"]
+        args += ["-device", "usb-kbd"]
+        args += ["-device", "usb-tablet"]
+
+        args += ["-device", "virtio-keyboard-device"]
+        args += ["-device", "virtio-mouse-device"]
+        args += ["-device", "virtio-gpu"]
       end
 
-      args += ["-device", "qemu-xhci,id=xhci"]
-      args += ["-device", "usb-kbd"]
-      args += ["-device", "usb-tablet"]
-
-      args += ["-device", "virtio-keyboard-device"]
-      args += ["-device", "virtio-mouse-device"]
-      args += ["-device", "virtio-gpu"]
-      
-
       # copy to /Users/artur/.cache/dat/vm/debian/arm64/debian/vars.fd
       # /opt/homebrew/share/qemu/edk2-aarch64-vars.fd
       # args += ["-drive", "if=pflash,format=raw,unit=1,file=/Users/artur/.cache/dat/vm/debian/arm64/debian/vars.fd"]
@@ -111,22 +139,24 @@ module Qemu
     if opts[:cdrom] != nil 
       args += ["-cdrom", opts[:cdrom]]
     end
-    args += ["-device", "virtio-net,netdev=n0", "-netdev", "user,id=n0"] # user-mode NAT
+#    args += ["-device", "virtio-net,netdev=n0", "-netdev", "user,id=n0"] # user-mode NAT
     # optional: uncomment to run headless with VNC on :5901
     # args += ["-display", "none", "-vnc", "127.0.0.1:1"]
 
     cmd = [qemu, *args]
 
     puts "Launching: #{cmd.join(' ')}"
-    pid = Process.spawn(*cmd, pgroup: true, out: $stdout, err: $stderr)
     
     if opts[:detach]
+      log = File.open("log.txt", "w")
+      pid = Process.spawn(*cmd, pgroup: false, out: log, err: log)
       Process.detach(pid)
       puts "QEMU pid=#{pid}"
     else 
+      pid = Process.spawn(*cmd, pgroup: true, out: $stdout, err: $stderr)
       Process.wait(pid)
       status = $?
       puts "Exit status: #{status.exitstatus}"
     end
   end
-end
+end