rootfsinstall: new -I parameter to support installation from image (.img) instead of rootfs

src/rootfsinstall.sh

@@ -20,7 +20,7 @@ function usage() {
    echo "-rpi        : make a RaspberryPi image with boot partition"
    echo
    echo "Options:"
-   echo "-a archive  : additional archive to unpack in rootfs root"
+   echo "-a archive  : additional archive to unpack in rootfs root (may be specified multiple times)"
    echo "-cp command : command to run before chroot (may be specified multiple times)"
    echo "              Use @ROOT@ as reference to rootfs path and @BOOT@ as reference to bootfs path"
    echo "-c command  : command to run through chroot in rootfs (may be specified multiple times)"
@@ -29,13 +29,15 @@ function usage() {
    echo "-k kernel   : extract and use specified kernel file from ROOTFS/boot/ for boot"
    echo "-k2 kernel  : extract and use specified second kernel file from ROOTFS/boot/ for boot"
    echo "-i packages : install packages using package manager in chroot"
+   echo "-I          : treat input as an image file"
    echo "-l          : force local installation only; don't perform installation from network"
    echo "-L          : rootfs volume label (default: 'openmamba')"
    echo "-p password : set given password for root user"
    echo "-r mode     : set given default video mode where applicable (e.g. -r 1920x1080-32@60)"
    echo "-y          : assume yes to all questions (script mode)"
    echo
-   echo "Example: $0 /dev/sdb /tmp/openmamba-rootfs-light.arm.tar.xz"
+   echo "Example 1: $0 /dev/sdb /tmp/openmamba-rootfs-light.arm.tar.xz"
+   echo "Example 2: $0 /dev/sdb -rpi /tmp/openmamba-diskimg-raspberrypi-it-snapshot-20170910.arm.img.gz"
    exit 1
 }
 
@@ -112,6 +114,7 @@ while [ "$1" ]; do
            INSTALLPACKAGES="$2"
            shift
            ;;
+      -I) IMAGEMODE=1 ;;
       -l) LOCALONLY=1 ;;
       -L) [ "$2" ] || {
               echo "Error: -L option requires a volume label as argument; aborting."
@@ -236,6 +239,7 @@ echo
    [ "$ans" = "y" -o "$ans" = "Y" ] || exit 0
 }
 
+if [ ! "$IMAGEMODE" ]; then
    sudo parted -s ${DRIVE} mktable msdos
    if [ "$?" != "0" ]; then
       echo "ERROR: parted exited with error $? while creating partition table on ${DRIVE}; aborting."
@@ -289,6 +293,15 @@ mke2fs -q -F -t $SYSTEMFSTYPE -j -L "$VOLUME_LABEL" $PARTITION2 || {
       exit 1
    }
 
+else
+   # Image mode
+   gunzip -c ${ROOTFSARCHIVE} | dd of=${DRIVE} bs=32M
+   # Grow system partition to 100%
+   parted ${DRIVE} resizepart 2 100%
+   e2fsck -f ${PARTITION2}
+   resize2fs ${PARTITION2}
+fi
+
 [ "$BOOTFSTYPE" ] && BOOTMP=`mktemp -d -t rootfsinstall.XXXXXXXX`
 ROOTMP=`mktemp -d -t rootfsinstall.XXXXXXXX`
 
@@ -318,6 +331,7 @@ fi
       exit 1
    }
 
+   if [ ! "${IMAGEMODE}" ]; then
       echo "Uncompressing $ROOTFSARCHIVE..."
       echo -n "This can take a while, please wait..."
       tar xf $ROOTFSARCHIVE || {
@@ -326,6 +340,8 @@ fi
          exit 1
       }
       echo "DONE"
+   fi
+
    for b in dev dev/pts proc sys run; do
       mount -o bind /$b $ROOTMP/$b
    done
@@ -364,7 +380,7 @@ if [ "$SETHOSTNAME" ]; then
    sed -i "s|\(127\.0\.0\.1\W*\)\(.*\)|\1 $SETHOSTNAME.localdomain $SETHOSTNAME localhost.localdomain localhost|" $ROOTMP/etc/hosts
 fi
 
-if [ "$INSTALLPACKAGES" -a "$LOCALONLY" != "1" ]; then
+if [ "$INSTALLPACKAGES" -a "$LOCALONLY" != "1" -a ! "${IMAGEMODE}" ]; then
    mv $ROOTMP/etc/resolv.conf $ROOTMP/etc/resolv.conf.rootfsinstall
    cp /etc/resolv.conf $ROOTMP/etc/resolv.conf
    chroot $ROOTMP bash -c /etc/profile.d/gpg-key-openmamba.sh
@@ -381,7 +397,7 @@ if [ "$INSTALLPACKAGES" -a "$LOCALONLY" != "1" ]; then
    mv $ROOTMP/etc/resolv.conf.rootfsinstall $ROOTMP/etc/resolv.conf
 fi
 
-if [ "$REMOVEPACKAGES" ]; then
+if [ "$REMOVEPACKAGES" -a ! "${IMAGEMODE}" ]; then
    chroot $ROOTMP smart remove -y $REMOVEPACKAGES 2>/dev/null || true
 fi
 
@@ -391,6 +407,7 @@ KERNELDEST2=`echo $KERNELDEST2 | sed "s|@BOOT@|$BOOTMP|g"`
 #
 # Prepare boot partition
 #
+if [ ! "${IMAGEMODE}" ]; then
 if [ "$TARGETDEVICE" = "baytrail" ]; then
    # create EFI Grub 64 bit image
    mkdir -p $BOOTMP/EFI/BOOT/
@@ -561,6 +578,8 @@ if [ "$USEKERNEL" ]; then
    fi
 fi
 
+fi # ! IMAGEMODE
+
 #
 # Final custom commands
 #