Add support for tar.gz rootfses

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Signed-off-by: Víctor Mayoral Vilches <v.mayoralv@gmail.com>
Reviewed-by: Brian Woods <brian.woods@xilinx.com>

2 files changed, 21 insertions, 9 deletions

diff --git a/README.md b/README.md
index eaa7431..c9a9850 100644
--- a/README.md
+++ b/README.md
@@ -114,12 +114,15 @@ partition for each Dom0/DomU cpio archive to write to disk.
 disk\_image will write to disk as separate partition each file specified
 as follows:
 
-- DOM0_ROOTFS specifies the Dom0 rootfs to use. Note that the file to
-  write should be a regular cpio.gz file, not a u-boot binary.
+- DOM0_ROOTFS specifies the Dom0 rootfs to use.
 
-- DOMU_ROOTFS[number] specifies the DomU rootfs to use. Note that it
-  should be a regular cpio.gz file, not a u-boot binary.
+- DOMU_ROOTFS[number] specifies the DomU rootfs to use.
 
+The provided rootfs should not be a u-boot binary. The supported
+formats are:
+
+- cpio.gz
+- tar.gz
 
 After you've generated the u-boot scripts using the uboot-script-gen
 script, disk_image is run as follows:
diff --git a/scripts/disk_image b/scripts/disk_image
index 6f5f3e2..800de99 100755
--- a/scripts/disk_image
+++ b/scripts/disk_image
@@ -38,7 +38,7 @@ function add_partition()
     _npart=$(( $_npart + 1 ))
 }
 
-function write_cpio()
+function write_rootfs()
 {
     local j=$1
     local rootfs=$2
@@ -49,9 +49,18 @@ function write_cpio()
     
     # Extract rootfs cpio archive into `.../part/vos_$j`
     cd ${DESTDIR}/part/disk$j
-    cat "${UBOOT_OUT_ABS}/$rootfs" | gunzip | cpio -id
+
+    if [[ $rootfs = *.cpio.gz ]]
+    then
+        cat "${UBOOT_OUT_ABS}/$rootfs" | gunzip | cpio -id
+    elif [[ $rootfs = *.tar.gz ]]
+    then
+        tar xvzf "${UBOOT_OUT_ABS}/$rootfs"
+    else
+        echo "Ignoring $rootfs: unsupported file format. Use cpio.gz or tar.gz."
+    fi
+
     cd -
-    
     # umount
     sync
     umount $DESTDIR/part/disk$j
@@ -263,7 +272,7 @@ umount $DESTDIR/part/disk1
 j=2
 if test "$DOM0_ROOTFS"
 then
-    write_cpio 2 "$DOM0_ROOTFS"
+    write_rootfs 2 "$DOM0_ROOTFS"
     j=$(( $j + 1 ))
 fi
 
@@ -272,7 +281,7 @@ while test $i -lt $NUM_DOMUS
 do
     if test "${DOMU_ROOTFS[$i]}"
     then
-        write_cpio $j "${DOMU_ROOTFS[$i]}"
+        write_rootfs $j "${DOMU_ROOTFS[$i]}"
         j=$(( $j + 1 ))
     fi
     i=$(( $i + 1 ))