From 274ec1022ec5bdff6bf96503fab6d17ad9d1005a Mon Sep 17 00:00:00 2001
From: Dean Troyer <dtroyer@gmail.com>
Date: Tue, 11 Oct 2011 20:32:07 -0500
Subject: [PATCH] Add build_usb_boot.sh

---
 tools/build_usb_boot.sh | 105 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100755 tools/build_usb_boot.sh

diff --git a/tools/build_usb_boot.sh b/tools/build_usb_boot.sh
new file mode 100755
index 0000000..b4205b7
--- /dev/null
+++ b/tools/build_usb_boot.sh
@@ -0,0 +1,105 @@
+#!/bin/bash -e
+# build_usb_boot.sh - Create a syslinux boot environment
+#
+# build_usb_boot.sh [-k kernel-version] destdev
+#
+# Assumes syslinux is installed
+# Assumes devstack files are in `pwd`/pxe
+# Needs to run as root
+
+KVER=`uname -r`
+if [ "$1" = "-k" ]; then
+    KVER=$2
+    shift;shift
+fi
+
+DEST_DIR=${1:-/tmp/syslinux-boot}
+PXEDIR=${PXEDIR:-/var/cache/devstack/pxe}
+OPWD=`pwd`
+PROGDIR=`dirname $0`
+
+if [ -b $DEST_DIR ]; then
+    # We have a block device, install syslinux and mount it
+    DEST_DEV=$DEST_DIR
+    DEST_DIR=`mktemp -d mntXXXXXX`
+
+    # Install syslinux on the device
+    syslinux --install --directory syslinux $DEST_DEV
+
+    mount $DEST_DEV $DEST_DIR
+else
+    # We have a directory (for sanity checking output)
+	DEST_DEV=""
+	if [ ! -d $DEST_DIR/syslinux ]; then
+	    mkdir -p $DEST_DIR/syslinux
+	fi
+fi
+
+# Get some more stuff from syslinux
+for i in memdisk menu.c32; do
+	cp -p /usr/lib/syslinux/$i $DEST_DIR/syslinux
+done
+
+CFG=$DEST_DIR/syslinux/syslinux.cfg
+cat >$CFG <<EOF
+default /syslinux/menu.c32
+prompt 0
+timeout 0
+
+MENU TITLE Boot Menu
+
+EOF
+
+# Setup devstack boot
+mkdir -p $DEST_DIR/ubuntu
+if [ ! -d $PXEDIR ]; then
+    mkdir -p $PXEDIR
+fi
+if [ ! -r $PXEDIR/vmlinuz-${KVER} ]; then
+    sudo chmod 644 /boot/vmlinuz-${KVER}
+    if [ ! -r /boot/vmlinuz-${KVER} ]; then
+        echo "No kernel found"
+    else
+        cp -p /boot/vmlinuz-${KVER} $PXEDIR
+    fi
+fi
+cp -p $PXEDIR/vmlinuz-${KVER} $DEST_DIR/ubuntu
+if [ ! -r $PXEDIR/stack-initrd.gz ]; then
+    cd $OPWD
+    sudo $PROGDIR/build_ramdisk.sh $PXEDIR/stack-initrd.gz
+fi
+cp -p $PXEDIR/stack-initrd.gz $DEST_DIR/ubuntu
+cat >>$CFG <<EOF
+
+LABEL devstack
+    MENU LABEL ^devstack
+    MENU DEFAULT
+    KERNEL /ubuntu/vmlinuz-$KVER
+    APPEND initrd=/ubuntu/stack-initrd.gz ramdisk_size=2109600 root=/dev/ram0
+EOF
+
+# Get Ubuntu
+if [ -d $PXEDIR -a -r $PXEDIR/natty-base-initrd.gz ]; then
+    cp -p $PXEDIR/natty-base-initrd.gz $DEST_DIR/ubuntu
+    cat >>$CFG <<EOF
+
+LABEL ubuntu
+    MENU LABEL ^Ubuntu Natty
+    KERNEL /ubuntu/vmlinuz-$KVER
+    APPEND initrd=/ubuntu/natty-base-initrd.gz ramdisk_size=419600 root=/dev/ram0
+EOF
+fi
+
+# Local disk boot
+cat >>$CFG <<EOF
+
+LABEL local
+    MENU LABEL ^Local disk
+    MENU DEFAULT
+    LOCALBOOT 0
+EOF
+
+if [ -n "$DEST_DEV" ]; then
+    umount $DEST_DIR
+    rmdir $DEST_DIR
+fi