From 75e0c79ab60ad93192a1e992ac8a87237039f42f Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Fri, 15 Feb 2013 16:50:41 -0200
Subject: Adding image bootless subcommand

---
 share/hydra/bootless | 165 +++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 127 insertions(+), 38 deletions(-)

diff --git a/share/hydra/bootless b/share/hydra/bootless
index e49c396..8eb268a 100755
--- a/share/hydra/bootless
+++ b/share/hydra/bootless
@@ -76,16 +76,6 @@ EOF
 
   usbdevice=`echo ${device} | sed -e s/[0-9]\$//g`
   
-  # Target device consistency check
-  if [ ! -b ${device} ]; then
-    echo "Error: device \"${device}\" not found."
-    exit 1
-  fi
-  
-  if [ "`mount | grep ${device}`" != "" ]; then
-    echo "Error: device \"${device}\" is mounted."
-  fi
-  
   # Issue a warning
   cat <<EOF
 
@@ -105,32 +95,9 @@ EOF
     exit 1
   fi
 
-  # Target device consistency check
-  if [ ! -b ${device} ]; then
-    echo "Error: device \"${device}\" not found."
-    exit 1
-  fi
-
-  # Remove old partitions
-  for partition in `$sudo parted -s -- ${usbdevice} print | awk '/^ / {print $1}'`; do
-    $sudo parted -s -- ${usbdevice} rm $partition
-  done
+  hydra_bootless_device ${usbdevice} ${device}
 
-  # Create a single partition
-  $sudo parted -s -- ${usbdevice} mkpart primary ext2 2 -1
-  $sudo parted -s -- ${usbdevice} set 1 boot on
-  
-  # Format and mount
-  $sudo mke2fs ${device}
-  if [ $? != 0 ]; then
-    echo "Error: mke2fs failed in \"${device}\" (errno: $?)."
-    exit 1
-  fi
-  $sudo tune2fs -c 0 -i 0 ${device}
-  if [ $? != 0 ]; then
-    echo "Error: tune2fs failed in \"${device}\" (errno: $?)."
-    exit 1
-  fi
+  # Mount
   tmpdir=`mktemp -d`
   $sudo mount ${device} ${tmpdir}
   if [ $? != 0 ]; then
@@ -160,7 +127,12 @@ EOF
   #quit" | grub --device-map=${devicemap} --batch
   
   # Grub 2
-  $sudo grub-install --root-directory=${tmpdir} ${usbdevice} --force
+  #$sudo grub-install --root-directory=${tmpdir} ${usbdevice} --force
+  $sudo grub-install --boot-directory=${tmpdir} ${usbdevice} --force
+  if [ $? != 0 ]; then
+    echo "Error: grub-install failed (errno: $?)."
+    exit 1
+  fi
   
   # Finalize
   #rm -f ${devicemap}
@@ -293,14 +265,128 @@ function hydra_bootless_git {
   )
 }
 
+# Create a target device
+# TODO: properly support $subdevice in parted
+function hydra_bootless_device {
+  local device="$1"
+  local subdevice="$2"
+
+  # Check if device is mounted
+  if [ "`mount | grep ${subdevice}`" != "" ]; then
+    echo "Error: device \"${subdevice}\" is mounted."
+    exit 1
+  fi
+
+  # Target device consistency check
+  if [ ! -b ${subdevice} ]; then
+    echo "Error: device \"${subdevice}\" not found."
+    exit 1
+  fi
+
+  # Remove old partitions
+  for partition in `$sudo parted -s -- ${device} print | awk '/^ / {print $1}'`; do
+    $sudo parted -s -- ${device} rm $partition
+  done
+
+  # Create a single partition
+  $sudo parted -s -- ${device} mkpart primary ext2 2 -1
+  $sudo parted -s -- ${device} set 1 boot on
+
+  # Create filesystem
+  $sudo mke2fs ${subdevice}
+  if [ $? != 0 ]; then
+    echo "Error: mke2fs failed in \"${subdevice}\" (errno: $?)."
+    exit 1
+  fi
+
+  # Tune
+  $sudo tune2fs -c 0 -i 0 ${subdevice}
+  if [ $? != 0 ]; then
+    echo "Error: tune2fs failed in \"${subdevice}\" (errno: $?)."
+    exit 1
+  fi
+}
+
+# Generate a bootless disk image
+function hydra_bootless_image {
+  local output="$1"
+  local size="$2"
+
+  if [ -z "$output" ]; then
+    output="bootless.img"
+  fi
+
+  if [ -z "$size" ]; then
+    # TODO: calculate minimum size. Hint:
+    # du --exclude='.git' -hs ${BOOTLESS_DIR}
+    size="200"
+  fi
+
+  # Set folder
+  hydra_bootless_folder
+
+  # Set sudo config
+  local sudo
+  if [ "`whoami`" != 'root' ]; then
+    sudo="sudo"
+  fi
+
+  echo "Creating an empty image..."
+  dd if=/dev/zero of=$output bs=1M count=$size
+
+  echo "Partitioning image..."
+  parted -s -- ${output} mklabel msdos
+  parted -s -- ${output} mkpart primary ext2 2 -1
+  parted -s -- ${output} set 1 boot on
+
+  echo "Creating device mappings..."
+  tmpdir=`mktemp -d`
+  mapping="`$sudo kpartx -av ${output}`"
+  if [ "$?" != "0" ]; then
+    echo "Error: failed to create device mapping for \"${output}\" (errno: $?)."
+    exit 1
+  fi
+
+  # Set devices
+  device="`echo $mapping | head | awk '{ print $8 }'`"
+  subdevice="/dev/mapper/`echo $mapping | head | awk '{ print $3 }'`"
+
+  # Create filesystem
+  $sudo mke2fs ${subdevice}
+
+  # Mount
+  $sudo mount ${subdevice} ${tmpdir}
+  if [ $? != 0 ]; then
+    echo "Error: failed to mount \"${subdevice}\" filesystem in \"${tmpdir}\" (errno: $?)."
+    exit 1
+  fi
+
+  # Copy data
+  $sudo rsync -Cav ${BOOTLESS_DIR}/ ${tmpdir}/boot/
+
+  # Install grub
+  #$sudo grub-install --root-directory=${tmpdir} ${device} --force
+  $sudo grub-install --boot-directory=${tmpdir} ${device} --force
+  if [ $? != 0 ]; then
+    echo "Error: grub-install failed (errno: $?)."
+    exit 1
+  fi
+
+  # Finalize
+  $sudo umount ${tmpdir}
+  $sudo kpartx -dv ${output}
+  $sudo rm -rf ${tmpdir}
+  echo "Image saved at ${output}"
+}
+
 # Usage
 function hydra_bootless_usage {
   echo "Usage: `basename $0` <action> [arguments]"
   exit 1
 }
 
-# Check for requirements.
-for req in parted; do
+# Check for requirements
+for req in parted kpartx; do
   hydra_install_package $req
 done
 
@@ -322,6 +408,9 @@ elif [ "$1" == "update" ]; then
 elif [ "$1" == "git" ]; then
   shift
   hydra_bootless_git $*
+elif [ "$1" == "image" ]; then
+  shift
+  hydra_bootless_image $*
 else
   hydra_bootless_usage
 fi
-- 
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