Move qemu startup to its own script.

This causes us to reinstall and rebuild the image each time
we run qemu. This necessary now that we are loading files
from the disk because cmake makes it tricky (impossible?) to
have a command rely on a different target being "installed".

Because of this, updates to the teton executable were not being
picked up on the image.

CMakeLists.txt

@@ -16,28 +16,3 @@ add_subdirectory(zion)
 add_subdirectory(lib)
 add_subdirectory(yunq)
 add_subdirectory(sys)
-
-# Use machine q35 to access PCI devices.
-set(QEMU_CMD qemu-system-x86_64 -machine q35 -d guest_errors -m 1G -serial stdio -hda disk.img)
-
-add_custom_command(
-  OUTPUT disk.img
-  COMMAND sudo sh ../scripts/build_image.sh disk.img
-  DEPENDS zion yellowstone denali victoriafalls
-  USES_TERMINAL
-)
-
-add_custom_target(qemu
-  COMMAND ${QEMU_CMD}
-  DEPENDS disk.img
-  USES_TERMINAL)
-
-add_custom_target(qemu-dbg
-  COMMAND ${QEMU_CMD} -S -s
-  DEPENDS disk.img
-  USES_TERMINAL)
-
-add_custom_target(qemu-int
-  COMMAND ${QEMU_CMD} -d int
-  DEPENDS disk.img
-  USES_TERMINAL)

scripts/qemu.sh

@@ -0,0 +1,23 @@
+#! /bin/bash
+
+set -e
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+echo $DIR
+
+BUILD_DIR="${DIR}/../builddbg"
+
+pushd $BUILD_DIR 
+ninja && ninja install
+
+sudo sh ${DIR}/build_image.sh disk.img
+
+# Use machine q35 to access PCI devices.
+qemu-system-x86_64 -machine q35 -d guest_errors -m 1G -serial stdio -hda disk.img
+popd
+
+# Extra options to add to this script in the future.
+# Debug opts: -S -s
+# Interrupt opts: -d int
+