command: add new build flag '--keep-builddir'

The working directory contains the files of a target OS system to build
and it's the source to create partitions and OS image. With the flag
'--keep-builddir' won't remove the working directory after the target OS
image is built such that one can traverse the file system in the build
machine. By default, the working directory will be removed.

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I00e8488797535410fde6dbd01249ecb8ebc1ae56

functions

@@ -1,5 +1,5 @@
-boot_mnt=${WORKDIR}/boot
-rootfs_mnt=${WORKDIR}/rootfs
+boot_mnt=${build_dir}/boot
+rootfs_mnt=${build_dir}/rootfs
 fixups_dir=/host/fixups
 
 do_unmount() {
@@ -30,7 +30,12 @@ cleanup() {
     fi
 
     umount -f ${boot_mnt} ${rootfs_mnt} 2>/dev/null
-    rm -rf ${boot_mnt} ${rootfs_mnt}
+    if [ "x${opt_keep_builddir}" != "xtrue" ]; then
+        rm -rf ${boot_mnt} ${rootfs_mnt}
+    fi
+    if [ "$(ls ${build_dir} | wc -l)" = "0" ]; then
+        rm -rf ${build_dir}
+    fi
 }
 
 trap_ctrlc() {

odroid-stamper

@@ -8,6 +8,8 @@ usage() {
 	echo "    --help: this help message"
 	echo "    --output=<path>: output directory for image files."
 	echo "    --live: enforce to build live boot system image."
+	echo "    --keep-builddir: prevent removing temporary directory"
+	echo "                     after building an image."
 	exit 1
 }
 
@@ -22,7 +24,6 @@ RUN_MENU=true
 DEFAULT_CONFIG=${WORKDIR}/.config
 
 download_dir="/var/cache/odroid-stamper/downloads"
-out_dir=${WORKDIR}
 
 for opt in "$@"; do
 	case $opt in
@@ -35,9 +36,14 @@ for opt in "$@"; do
 
 		--no-live)	opt_livesystem=false;;
 		--live)		opt_livesystem=true;;
+		--keep-builddir)
+				opt_keep_builddir=true;;
 	esac
 done
 
+[ "x${out_dir}" = "x" ] && out_dir=${WORKDIR}
+build_dir="${out_dir}/BUILD"
+
 . ${TOPDIR}/menu
 . ${TOPDIR}/default
 . ${TOPDIR}/functions