mksquashfsimge.sh: Support creating a sparse image

Change-Id: Idc28996028e666f929c032e5380312b7b28faa91
Signed-off-by: Mohamad Ayyash <mkayyash@google.com>

diff --git a/squashfs_utils/mksquashfsimage.sh b/squashfs_utils/mksquashfsimage.sh
index 7f96cb1..c1eec7b 100755 (executable)
--- a/squashfs_utils/mksquashfsimage.sh
+++ b/squashfs_utils/mksquashfsimage.sh
@@ -5,7 +5,7 @@
 function usage() {
 cat<<EOT
 Usage:
-${0##*/} SRC_DIR OUTPUT_FILE [-m MOUNT_POINT] [-c FILE_CONTEXTS] [-b BLOCK_SIZE]
+${0##*/} SRC_DIR OUTPUT_FILE [-s] [-m MOUNT_POINT] [-c FILE_CONTEXTS] [-b BLOCK_SIZE]
 EOT
 }
 
@@ -24,6 +24,12 @@ fi
 OUTPUT_FILE=$2
 shift; shift
 
+SPARSE=false
+if [[ "$1" == "-s" ]]; then
+    SPARSE=true
+    shift;
+fi
+
 MOUNT_POINT=
 if [[ "$1" == "-m" ]]; then
     MOUNT_POINT=$2
@@ -56,6 +62,17 @@ fi
 MAKE_SQUASHFS_CMD="mksquashfs $SRC_DIR $OUTPUT_FILE -no-progress -comp lz4 -Xhc -no-exports -noappend -no-recovery -android-fs-config $OPT"
 echo $MAKE_SQUASHFS_CMD
 $MAKE_SQUASHFS_CMD
+
 if [ $? -ne 0 ]; then
     exit 4
 fi
+
+SPARSE_SUFFIX=".sparse"
+if [ "$SPARSE" = true ]; then
+    img2simg $OUTPUT_FILE $OUTPUT_FILE$SPARSE_SUFFIX
+    if [ $? -ne 0 ]; then
+        exit 4
+    fi
+    mv $OUTPUT_FILE$SPARSE_SUFFIX $OUTPUT_FILE
+fi
+