mkimage: guess platform automatically, add new options to set fstype and boot fssize.

mkimage.sh.in

@@ -50,30 +50,38 @@ die() {
 }
 
 usage() {
-    echo "Usage: $PROGNAME [-b fstype] [-o filename] [-r fstype] [-hV] <rootfs-tarball> [size]"
-    echo
-    echo " The <rootfs-tarball> argument expects a file generated by void-mkrootfs."
-    echo " The <size> argument expects a number (GB). If <size> is not set, defaults to 2."
-    echo
-    echo "OPTIONS"
-    echo " -b <fstype>    Set /boot <fstype> (defaults to FAT, 32MB)"
-    echo " -o <filename>  Set output <filename>."
-    echo " -r <fstype>    Set / <fstype> (defaults to ext4, 32MB - <size>)"
-    echo " -p <platform>  Set platform type: cubieboard2, rpi, odroid-u2"
-    echo
-    echo " Resulting image will have 2 partitions, /boot and / of total <size>." 
+    cat <<_EOF
+Usage: $PROGNAME [options] <rootfs-tarball>
+
+The <rootfs-tarball> argument expects a tarball generated by void-mkrootfs.
+The platform is guessed automatically by its name.
+
+Accepted sizes suffixes: K, M, G, T, E.
+
+OPTIONS
+ -b <fstype>    Set /boot filesystem type (defaults to FAT)
+ -B <bsize>     Set /boot filesystem size (defaults to 64MB)
+ -r <fstype>    Set / filesystem type (defaults to EXT4)
+ -s <totalsize> Set total image size (defaults to 2GB)
+ -o <output>    Set image filename (guessed automatically)
+ -h             Show this help
+ -V             Show version
+
+Resulting image will have 2 partitions, /boot and /.
+_EOF
     exit 0
 }
 
 #
 # main()
 #
-while getopts "b:o:r:p:hV" opt; do
+while getopts "b:B:o:r:s:hV" opt; do
     case $opt in
         b) BOOT_FSTYPE="$OPTARG";;
+        B) BOOT_FSSIZE="$OPTARG";;
         o) FILENAME="$OPTARG";;
         r) ROOT_FSTYPE="$OPTARG";;
-        p) PLATFORM="$OPTARG";;
+        s) IMGSIZE="$OPTARG";;
         V) echo "$PROGNAME @@MKLIVE_VERSION@@"; exit 0;;
         h) usage;;
     esac
@@ -87,6 +95,9 @@ elif [ ! -r "$ROOTFS_TARBALL" ]; then
     die "Cannot read rootfs tarball: $ROOTFS_TARBALL"
 fi
 
+PLATFORM="${ROOTFS_TARBALL#void-}"
+PLATFORM="${PLATFORM%-rootfs*}"
+
 if [ "$(id -u)" -ne 0 ]; then
     die "need root perms to continue, exiting."
 fi
@@ -98,19 +109,18 @@ else
     IMGSIZE="${2}G"
 fi
 
-if [ -z "$BOOT_FSTYPE" ]; then
-    BOOT_FSTYPE="vfat"
-fi
-if [ -z "$ROOT_FSTYPE" ]; then
-    ROOT_FSTYPE="ext4"
-fi
+: ${BOOT_FSTYPE:=vfat}
+: ${BOOT_FSSIZE:=64M}
+: ${ROOT_FSTYPE:=ext4}
+
 if [ -z "$FILENAME" ]; then
-    FILENAME="void-image-$(date +%Y%m%d).img"
+    FILENAME="void-${PLATFORM}-$(date +%Y%m%d).img"
 fi
 
+# double check PLATFORM is supported...
 case "$PLATFORM" in
     cubieboard2|odroid-u2|rpi);;
-    *) die "Unknown platform or platform unset, set it with -p!"
+    *) die "The $PLATFORM is not supported, exiting..."
 esac
 
 for f in parted partx losetup mount mkfs.${BOOT_FSTYPE} mkfs.${ROOT_FSTYPE}; do
@@ -135,8 +145,8 @@ if [ "$BOOT_FSTYPE" = "vfat" ]; then
     _btype="fat32"
     _args="-I"
 fi
-parted $FILENAME mkpart primary ${_btype} 4096s 64M
-parted $FILENAME mkpart primary ext2 64M 100%
+parted $FILENAME mkpart primary ${_btype} 4096s ${BOOT_FSSIZE}
+parted $FILENAME mkpart primary ext2 ${BOOT_FSSIZE} 100%
 parted $FILENAME toggle 1 boot
 LOOPDEV=$(losetup --show --find $FILENAME)
 partx -a $LOOPDEV