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path: root/i/pc104/initrd/update.sh
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#!/bin/bash
# Script for updating the marvin program in the initrd.

# Variables - Default values
# Local directory name containing the representation for the initrd
ROBOT_LOCAL_DIR="./robot"
# Remote directory in the initrd
ROBOT_REMOTE_DIR="/robot"
# Name of the script to launch the robot program
ROBOT_START_SCRIPT="start.sh"
# Build directory
ROBOT_BUILD_DIR="."
# Config directory
ROBOT_CONF_DIR="$ROBOT_BUILD_DIR/../runtime"
# Max size of the config directory
ROBOT_CONF_MAX_SIZE="3000"

check_rsync ()
{
	if [[ "x$(whereis rsync | cut -d ':' -f 2)" == "x" ]]
	then
		echo "Please install rsync"
		exit 1
	fi
}
# Check the structure (directory robot and startup script)
check_create_structure ()
{
	# Check the local directory exist
	if [[ ! -d $ROBOT_LOCAL_DIR ]]
	then
		mkdir $ROBOT_LOCAL_DIR
	fi
	# Check we have a start script
	if [[ ! -f $ROBOT_LOCAL_DIR/$ROBOT_START_SCRIPT ]]
	then
		# Create a default one
		echo -e \
		"# Startup script launched when the PC104 boot.\n\
# It will be sourced by other script.\n\
# Example : \n\
# ./test_ai -z" > $ROBOT_LOCAL_DIR/$ROBOT_START_SCRIPT
		# Need to tune it by the user
		echo "Please tune your $ROBOT_LOCAL_DIR/$ROBOT_START_SCRIPT."
		# XXX vim it ?
		exit 2
	fi
}

# Check that there is a line in the startup script for launchin a program and
# a binary existing
check_install_binary ()
{
	if [[ $(grep -cv "^#" $ROBOT_LOCAL_DIR/$ROBOT_START_SCRIPT) -eq 0 ]]
	then
		echo "No command found in your $ROBOT_LOCAL_DIR/$ROBOT_START_SCRIPT."
		exit 3
	fi
	for line in "$(grep -v "^#" $ROBOT_LOCAL_DIR/$ROBOT_START_SCRIPT)"
	do
		bin="$(echo "$line" | cut -d ' ' -f 1)"
		if [[ ! -x $ROBOT_BUILD_DIR/$bin ]]
		then
			echo "Binary not found : $bin."
			exit 4
		else
			# Copy the binary to the local dir
			install -m 777 $ROBOT_BUILD_DIR/$bin $ROBOT_LOCAL_DIR/
			# Remove useless symbol
			strip $ROBOT_LOCAL_DIR/$bin
		fi
	done
}

# Install the configuration
check_install_config ()
{
	# First we check the size
	if [[ $(du -bs $ROBOT_CONF_DIR | cut -f 1) -gt $ROBOT_CONF_MAX_SIZE ]]
	then
		echo "Config directory ($ROBOT_CONF_DIR) is too big."
		exit 5
	fi
	# There is no way to know the files needed, so we rsync everything
	rsync -aq $ROBOT_CONF_DIR/ $ROBOT_LOCAL_DIR/rc
}

# TODO Send it to the initrd
# Guiding steps :
# 1. Try netcat on the robot
# 1.a If it responding, we are in autonomous mode, wait that the PC104 mount
#     the real system for ssh
# 2. Try ssh
# 2.a Not responding, wrong robot/dns ? Too quick from 1 ?
# 3. Backuper/rotater l'initrd
# 4. D�compr�ss� l'initrd
# 5. Le monter
# 6. rsyncer
# 7. D�monter
# 8. Re-compresser

# TODO Parameter

check_rsync
check_create_structure
check_install_binary
check_install_config