refactor build process into smaller, more sensible, more restartable scripts

1 files changed, 49 insertions, 0 deletions

diff --git a/livecd-iso-to-bootable-tree.sh b/livecd-iso-to-bootable-tree.sh
new file mode 100755
index 0000000..29d418e
--- /dev/null
+++ b/livecd-iso-to-bootable-tree.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+
+set -e
+
+cleanup() {
+    [ -d "$EXTMNT" ] && umount $EXTMNT && rmdir $EXTMNT
+    [ -d "$SQUASHMNT" ] && umount $SQUASHMNT && rmdir $SQUASHMNT
+    [ -d "$ISOMNT" ] && umount $ISOMNT && rmdir $ISOMNT
+}
+
+exitclean() {
+    echo "Cleaning up to exit..."
+    cleanup
+    exit 1
+}
+
+trap exitclean SIGINT SIGTERM
+
+ISO=$(readlink -f "$1")
+ROOT=$(readlink -f "$2")
+
+ISOMNT=$(mktemp -d /media/isotmp.XXXXXX)
+mount -o loop,ro "$ISO" $ISOMNT || exitclean
+
+EXTIMG=$ISOMNT/LiveOS/ext3fs.img
+if [ -e $ISOMNT/LiveOS/squashfs.img ] ; then
+    SQUASHMNT=$(mktemp -d /media/squashtmp.XXXXXX)
+    mount -o loop,ro $ISOMNT/LiveOS/squashfs.img $SQUASHMNT || exitclean
+    EXTIMG=$SQUASHMNT/LiveOS/ext3fs.img
+fi
+
+EXTMNT=$(mktemp -d /media/exttmp.XXXXXX)
+mount -o loop,ro $EXTIMG $EXTMNT || exitclean
+
+echo "Create root filesystem..."
+
+mkdir -p $ROOT
+chmod a+rx $ROOT/.
+
+cp -a $EXTMNT/* $ROOT
+for initrd in $ISOMNT/isolinux/initrd*.img ; do
+    cp -p $initrd $ROOT/boot
+done
+for kernel in $ISOMNT/isolinux/vmlinuz* ; do
+    cp -p $kernel $ROOT/boot
+done
+
+echo "Done."
+cleanup