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#!/bin/sh
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########################################################################
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# rpi2-gen-image.sh ver2a 12/2015
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#
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# Advanced debian "jessie" bootstrap script for RPi2
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# some parts based on rpi2-build-image:
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# Copyright (C) 2015 Ryan Finnie <ryan@finnie.org>
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# Copyright (C) 2015 Luca Falavigna <dktrkranz@debian.org>
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########################################################################
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source ./functions.sh
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set -e
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set -x
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# Debian release
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RELEASE=${RELEASE:=jessie}
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KERNEL=${KERNEL:=3.18.0-trunk-rpi2}
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# Build settings
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BASEDIR=$(pwd)/images/${RELEASE}
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BUILDDIR=${BASEDIR}/build
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# General settings
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HOSTNAME=${HOSTNAME:=rpi2-${RELEASE}}
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PASSWORD=${PASSWORD:=raspberry}
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DEFLOCAL=${DEFLOCAL:="en_US.UTF-8"}
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TIMEZONE=${TIMEZONE:="Europe/Berlin"}
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XKBMODEL=${XKBMODEL:=""}
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XKBLAYOUT=${XKBLAYOUT:=""}
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XKBVARIANT=${XKBVARIANT:=""}
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XKBOPTIONS=${XKBOPTIONS:=""}
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EXPANDROOT=${EXPANDROOT:=true}
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# Network settings
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ENABLE_DHCP=${ENABLE_DHCP:=true}
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# NET_* settings are ignored when ENABLE_DHCP=true
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# NET_ADDRESS is an IPv4 or IPv6 address and its prefix, separated by "/"
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NET_ADDRESS=${NET_ADDRESS:=""}
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NET_GATEWAY=${NET_GATEWAY:=""}
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NET_DNS_1=${NET_DNS_1:=""}
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NET_DNS_2=${NET_DNS_2:=""}
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NET_DNS_DOMAINS=${NET_DNS_DOMAINS:=""}
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NET_NTP_1=${NET_NTP_1:=""}
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NET_NTP_2=${NET_NTP_2:=""}
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# APT settings
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APT_PROXY=${APT_PROXY:=""}
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APT_SERVER=${APT_SERVER:="ftp.debian.org"}
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# Feature settings
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ENABLE_CONSOLE=${ENABLE_CONSOLE:=true}
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ENABLE_IPV6=${ENABLE_IPV6:=true}
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ENABLE_SSHD=${ENABLE_SSHD:=true}
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ENABLE_SOUND=${ENABLE_SOUND:=true}
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ENABLE_DBUS=${ENABLE_DBUS:=true}
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ENABLE_HWRANDOM=${ENABLE_HWRANDOM:=true}
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ENABLE_MINGPU=${ENABLE_MINGPU:=false}
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ENABLE_XORG=${ENABLE_XORG:=false}
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ENABLE_WM=${ENABLE_WM:=""}
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ENABLE_RSYSLOG=${ENABLE_RSYSLOG:=true}
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ENABLE_USER=${ENABLE_USER:=true}
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ENABLE_ROOT=${ENABLE_ROOT:=false}
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ENABLE_ROOT_SSH=${ENABLE_ROOT_SSH:=false}
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# Advanced settings
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ENABLE_MINBASE=${ENABLE_MINBASE:=false}
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ENABLE_UBOOT=${ENABLE_UBOOT:=false}
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ENABLE_FBTURBO=${ENABLE_FBTURBO:=false}
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ENABLE_HARDNET=${ENABLE_HARDNET:=false}
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ENABLE_IPTABLES=${ENABLE_IPTABLES:=false}
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# Kernel compilation settings
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BUILD_KERNEL=${BUILD_KERNEL:=false}
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KERNEL_HEADERS=${KERNEL_HEADERS:=true}
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# Image chroot path
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R=${BUILDDIR}/chroot
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CHROOT_SCRIPTS=${CHROOT_SCRIPTS:=""}
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# Packages required for bootstrapping
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REQUIRED_PACKAGES="debootstrap debian-archive-keyring qemu-user-static binfmt-support dosfstools rsync bmap-tools whois git-core"
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# Missing packages that need to be installed
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MISSING_PACKAGES=""
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# Packages required in the chroot build environment
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APT_INCLUDES=${APT_INCLUDES:=""}
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APT_INCLUDES="${APT_INCLUDES},apt-transport-https,ca-certificates,debian-archive-keyring,dialog,sudo"
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set +x
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# Are we running as root?
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if [ "$(id -u)" -ne "0" ] ; then
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echo "this script must be executed with root privileges"
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exit 1
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fi
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# Add packages required for kernel cross compilation
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if [ "$BUILD_KERNEL" = true ] ; then
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REQUIRED_PACKAGES="${REQUIRED_PACKAGES} crossbuild-essential-armhf"
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fi
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# Check if all required packages are installed
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for package in $REQUIRED_PACKAGES ; do
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if [ "`dpkg-query -W -f='${Status}' $package`" != "install ok installed" ] ; then
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MISSING_PACKAGES="$MISSING_PACKAGES $package"
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fi
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done
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# Ask if missing packages should get installed right now
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if [ -n "$MISSING_PACKAGES" ] ; then
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echo "the following packages needed by this script are not installed:"
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echo "$MISSING_PACKAGES"
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echo -n "\ndo you want to install the missing packages right now? [y/n] "
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read confirm
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if [ "$confirm" != "y" ] ; then
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exit 1
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fi
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fi
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# Make sure all required packages are installed
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apt-get -qq -y install ${REQUIRED_PACKAGES}
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# Don't clobber an old build
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if [ -e "$BUILDDIR" ]; then
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echo "directory $BUILDDIR already exists, not proceeding"
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exit 1
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fi
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set -x
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# Call "cleanup" function on various signals and errors
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trap cleanup 0 1 2 3 6
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# Set up chroot directory
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mkdir -p $R
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# Add required packages for the minbase installation
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if [ "$ENABLE_MINBASE" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},vim-tiny,netbase,net-tools"
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else
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APT_INCLUDES="${APT_INCLUDES},locales,keyboard-configuration,console-setup"
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fi
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# Add parted package, required to get partprobe utility
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if [ "$EXPANDROOT" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},parted"
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fi
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# Add dbus package, recommended if using systemd
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if [ "$ENABLE_DBUS" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},dbus"
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fi
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# Add iptables IPv4/IPv6 package
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if [ "$ENABLE_IPTABLES" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},iptables"
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fi
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# Add openssh server package
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if [ "$ENABLE_SSHD" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},openssh-server"
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fi
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# Add alsa-utils package
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if [ "$ENABLE_SOUND" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},alsa-utils"
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fi
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# Add rng-tools package
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if [ "$ENABLE_HWRANDOM" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},rng-tools"
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fi
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if [ "$ENABLE_USER" = true ]; then
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APT_INCLUDES="${APT_INCLUDES},sudo"
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fi
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# Add fbturbo video driver
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if [ "$ENABLE_FBTURBO" = true ] ; then
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# Enable xorg package dependencies
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ENABLE_XORG=true
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fi
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# Add user defined window manager package
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if [ -n "$ENABLE_WM" ] ; then
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APT_INCLUDES="${APT_INCLUDES},${ENABLE_WM}"
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# Enable xorg package dependencies
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ENABLE_XORG=true
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fi
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# Add xorg package
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if [ "$ENABLE_XORG" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},xorg"
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fi
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## Main bootstrap
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for i in bootstrap.d/*.sh; do
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. $i
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done
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## Custom bootstrap scripts
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if [ -d "custom.d" ]; then
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for i in custom.d/*.sh; do
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. $i
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done
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fi
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# Invoke custom scripts
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if [ -n "${CHROOT_SCRIPTS}" ]; then
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cp -r "${CHROOT_SCRIPTS}" "${R}/chroot_scripts"
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LANG=C chroot $R bash -c 'for SCRIPT in /chroot_scripts/*; do if [ -f $SCRIPT -a -x $SCRIPT ]; then $SCRIPT; fi done;'
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rm -rf "${R}/chroot_scripts"
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fi
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## Cleanup
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chroot_exec apt-get -y clean
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chroot_exec apt-get -y autoclean
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chroot_exec apt-get -y autoremove
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# Unmount mounted filesystems
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umount -l $R/proc
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umount -l $R/sys
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# Clean up files
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rm -f $R/etc/apt/sources.list.save
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rm -f $R/etc/resolvconf/resolv.conf.d/original
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rm -rf $R/run
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mkdir -p $R/run
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rm -f $R/etc/*-
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rm -f $R/root/.bash_history
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rm -rf $R/tmp/*
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rm -f $R/var/lib/urandom/random-seed
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[ -L $R/var/lib/dbus/machine-id ] || rm -f $R/var/lib/dbus/machine-id
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rm -f $R/etc/machine-id
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rm -fr $R/etc/apt/apt.conf.d/10proxy
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rm -f $R/etc/resolv.conf
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# Calculate size of the chroot directory in KB
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CHROOT_SIZE=$(expr `du -s $R | awk '{ print $1 }'`)
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# Calculate the amount of needed 512 Byte sectors
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TABLE_SECTORS=$(expr 1 \* 1024 \* 1024 \/ 512)
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BOOT_SECTORS=$(expr 64 \* 1024 \* 1024 \/ 512)
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ROOT_OFFSET=$(expr ${TABLE_SECTORS} + ${BOOT_SECTORS})
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# The root partition is EXT4
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# This means more space than the actual used space of the chroot is used.
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# As overhead for journaling and reserved blocks 20% are added.
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ROOT_SECTORS=$(expr $(expr ${CHROOT_SIZE} + ${CHROOT_SIZE} \/ 100 \* 20) \* 1024 \/ 512)
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# Calculate required image size in 512 Byte sectors
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IMAGE_SECTORS=$(expr ${TABLE_SECTORS} + ${BOOT_SECTORS} + ${ROOT_SECTORS})
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# Prepare date string for image file name
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DATE="$(date +%Y-%m-%d)"
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# Prepare image file
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dd if=/dev/zero of="$BASEDIR/${DATE}-debian-${RELEASE}.img" bs=512 count=${TABLE_SECTORS}
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dd if=/dev/zero of="$BASEDIR/${DATE}-debian-${RELEASE}.img" bs=512 count=0 seek=${IMAGE_SECTORS}
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# Write partition table
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sfdisk -q -f "$BASEDIR/${DATE}-debian-${RELEASE}.img" <<EOM
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unit: sectors
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1 : start= ${TABLE_SECTORS}, size= ${BOOT_SECTORS}, Id= c, bootable
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2 : start= ${ROOT_OFFSET}, size= ${ROOT_SECTORS}, Id=83
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3 : start= 0, size= 0, Id= 0
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4 : start= 0, size= 0, Id= 0
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EOM
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# Set up temporary loop devices and build filesystems
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VFAT_LOOP="$(losetup -o 1M --sizelimit 64M -f --show $BASEDIR/${DATE}-debian-${RELEASE}.img)"
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EXT4_LOOP="$(losetup -o 65M -f --show $BASEDIR/${DATE}-debian-${RELEASE}.img)"
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mkfs.vfat "$VFAT_LOOP"
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mkfs.ext4 "$EXT4_LOOP"
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# Mount the temporary loop devices
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mkdir -p "$BUILDDIR/mount"
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mount "$EXT4_LOOP" "$BUILDDIR/mount"
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mkdir -p "$BUILDDIR/mount/boot/firmware"
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mount "$VFAT_LOOP" "$BUILDDIR/mount/boot/firmware"
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# Copy all files from the chroot to the loop device mount point directory
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rsync -a "$R/" "$BUILDDIR/mount/"
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# Unmount all temporary loop devices and mount points
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cleanup
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# (optinal) create block map file for "bmaptool"
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bmaptool create -o "$BASEDIR/${DATE}-debian-${RELEASE}.bmap" "$BASEDIR/${DATE}-debian-${RELEASE}.img"
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# Image was successfully created
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echo "$BASEDIR/${DATE}-debian-${RELEASE}.img (${IMAGE_SIZE})" ": successfully created"
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