devel/build_chroot

#!/bin/bash
#Configuration
: ${ARCH:=amd64}
: ${DIST_RELEASE:=squeeze}
: ${CONF_DIR:=/etc/schroot/chroot.d}
: ${CHROOT_DIR:=/srv/chroot}
: ${ALTERNATIVE_EDITOR:=/usr/bin/vim.basic}
: ${CHROOT_FINAL_HOOK:=/bin/true}
# Additional Variables taken from the environmen
# DATA_DIR
# CHROOT_EXTRA_DEBIAN_PACKAGES

#Automatically generated variables
CHROOTNAME=$DIST_RELEASE-$ARCH
CHNAME=building_$CHROOTNAME
TEMP_CHROOT_CONF=$CONF_DIR/$CHNAME.conf
FINAL_CHROOT_CONF=$CHROOTNAME.conf
ROOT=`pwd`
CHDIR=$ROOT/$CHNAME
USER=`whoami`
COMP_FILENAME=$CHROOTNAME.tar.gz
COMP_FILEPATH=$ROOT/$COMP_FILENAME
TEMP_DATA_DIR=`mktemp -d`
ACTUAL_DATA_DIR=$DATA_DIR
ACTUAL_DATA_DIR=${ACTUAL_DATA_DIR:-$TEMP_DATA_DIR}

#Runnability checks
if [ $USER != 'root' ]
then
  echo "This script requires root permissions to run"
  exit
fi

if [ -f $TEMP_CHROOT_CONF ]
then
  echo "The configuration file name for the temporary chroot"
  echo "  $TEMP_CHROOT_CONF"
  echo "already exists."
  echo "Remove it or change the CHNAME value in the script."
  exit
fi

#Create configuration dir and files if they do not exist
if [ ! -d $ACTUAL_DATA_DIR ]
then
  mkdir $ACTUAL_DATA_DIR
  echo "The data directory"
  echo "  $ACTUAL_DATA_DIR"
  echo "has been created."
fi

if [ ! -f $ACTUAL_DATA_DIR/final.schroot.conf.in ]
then
  cat <<END >$ACTUAL_DATA_DIR/final.schroot.conf.in
[${CHROOTNAME}]
description=Debian ${DIST_RELEASE} ${ARCH}
groups=src
source-root-groups=root
type=file
file=${CHROOT_DIR}/${COMP_FILENAME}
END
  echo "The file"
  echo " $ACTUAL_DATA_DIR/final.schroot.conf.in"
  echo "has been created with default configurations."
fi

if [ ! -f $ACTUAL_DATA_DIR/temp.schroot.conf.in ]
then
  cat <<END >$ACTUAL_DATA_DIR/temp.schroot.conf.in
[${CHNAME}]
description=Debian ${DIST_RELEASE} ${ARCH}
directory=${CHDIR}
groups=src
users=root
type=directory
END
  echo "The file"
  echo " $ACTUAL_DATA_DIR/temp.schroot.conf.in"
  echo "has been created with default configurations."
fi

#Stop on errors
set -e

#Cleanup
rm -rf $CHDIR
mkdir $CHDIR

#Install tools for building chroots
apt-get install -y schroot debootstrap

shopt -s expand_aliases
alias in_chroot='schroot -c $CHNAME -d / '
function subst_variables {
  sed \
    -e "s/\${ARCH}/$ARCH/" \
    -e "s*\${CHDIR}*$CHDIR*" \
    -e "s/\${CHNAME}/$CHNAME/" \
    -e "s/\${CHROOTNAME}/$CHROOTNAME/" \
    -e "s*\${CHROOT_DIR}*$CHROOT_DIR*" \
    -e "s/\${COMP_FILENAME}/$COMP_FILENAME/" \
    -e "s/\${DIST_RELEASE}/$DIST_RELEASE/" $@
}

#Generate chroot configurations
cat $ACTUAL_DATA_DIR/temp.schroot.conf.in | subst_variables > $TEMP_CHROOT_CONF
cat $ACTUAL_DATA_DIR/final.schroot.conf.in | subst_variables > $FINAL_CHROOT_CONF

#Install the base system
debootstrap --arch $ARCH $DIST_RELEASE $CHDIR

APT_INSTALL="apt-get install -y --no-install-recommends"

if [ DIST_RELEASE = squeeze ]
then
  echo "deb http://backports.debian.org/debian-backports" \
       "$DIST_RELEASE-backports main contrib non-free" \
       > $CHDIR/etc/apt/sources.list.d/backports.list
fi

#Install all the packages
in_chroot -- \
  apt-get update

case $DIST_RELEASE in

  squeeze)

    # do not install libghc6-network-dev, since it's too old, and just
    # confuses the dependencies
    in_chroot -- \
      $APT_INSTALL \
        autoconf automake \
        ghc cabal-install \
        libghc6-curl-dev \
        libghc6-parallel-dev \
        libghc6-text-dev \
        libghc6-vector-dev \
        libpcre3-dev \
        hlint hscolour pandoc \
        graphviz qemu-utils \
        python-docutils \
        python-simplejson \
        python-pyparsing \
        python-pyinotify \
        python-pycurl \
        python-ipaddr \
        python-yaml \
        python-paramiko

    in_chroot -- \
      $APT_INSTALL python-setuptools python-dev build-essential

    in_chroot -- \
      easy_install \
        logilab-astng==0.24.1 \
        logilab-common==0.58.3 \
        mock==1.0.1 \
        pylint==0.26.0

    in_chroot -- \
      easy_install \
        sphinx==1.1.3 \
        pep8==1.3.3 \
        coverage==3.4 \
        bitarray==0.8.0

    in_chroot -- \
      cabal update

    in_chroot -- \
      cabal install --global \
    blaze-builder==0.3.1.1 \
        network==2.3 \
        regex-pcre==0.94.4 \
        hinotify==0.3.2 \
        hslogger==1.1.4 \
        quickcheck==2.5.1.1 \
        attoparsec==0.10.1.1 \
        crypto==4.2.4 \
        MonadCatchIO-transformers==0.2.2.0 \
        mtl==2.0.1.0 \
        hashable==1.1.2.0 \
        case-insensitive==0.3 \
        parsec==3.0.1 \
        snap-server==0.8.1 \
        json==0.4.4

    in_chroot -- \
      cabal install --global \
        hunit==1.2.5.2 \
        happy==1.18.10 \
        hlint==1.8.43 \
        hscolour==1.20.3 \
        temporary==1.1.2.3 \
        test-framework==0.6.1 \
        test-framework-hunit==0.2.7 \
        test-framework-quickcheck2==0.2.12.3

    in_chroot -- \
      cabal install --global cabal-file-th

    in_chroot -- \
      cabal install --global shelltestrunner

    #Install selected packages from backports
    in_chroot -- \
      $APT_INSTALL -t squeeze-backports \
        git \
        git-email \
        vim

;;

  wheezy)

    in_chroot -- \
      $APT_INSTALL \
      autoconf automake ghc ghc-haddock libghc-network-dev \
      libghc-test-framework{,-hunit,-quickcheck2}-dev \
      libghc-json-dev libghc-curl-dev libghc-hinotify-dev \
      libghc-parallel-dev libghc-utf8-string-dev \
      libghc-hslogger-dev libghc-crypto-dev \
      libghc-regex-pcre-dev libghc-attoparsec-dev \
      libghc-vector-dev libghc-temporary-dev \
      libghc-snap-server-dev libpcre3 libpcre3-dev hscolour hlint pandoc \
      python-setuptools python-sphinx python-epydoc graphviz python-pyparsing \
      python-simplejson python-pycurl python-paramiko \
      python-bitarray python-ipaddr python-yaml qemu-utils python-coverage pep8 \
      shelltestrunner python-dev pylint openssh-client vim git git-email

    # We need version 0.9.4 of pyinotify because the packaged version, 0.9.3, is
    # incompatibile with the packaged version of python-epydoc 3.0.1.
    # Reason: a logger class in pyinotify calculates its superclasses at
    # runtime, which clashes with python-epydoc's static analysis phase.
    #
    # Problem introduced in:
    #   https://github.com/seb-m/pyinotify/commit/2c7e8f8959d2f8528e0d90847df360
    # and "fixed" in:
    #   https://github.com/seb-m/pyinotify/commit/98c5f41a6e2e90827a63ff1b878596

    in_chroot -- \
      easy_install pyinotify==0.9.4

;;

  *)

    in_chroot -- \
      $APT_INSTALL \
      autoconf automake ghc ghc-haddock libghc-network-dev \
      libghc-test-framework{,-hunit,-quickcheck2}-dev \
      libghc-json-dev libghc-curl-dev libghc-hinotify-dev \
      libghc-parallel-dev libghc-utf8-string-dev \
      libghc-hslogger-dev libghc-crypto-dev \
      libghc-regex-pcre-dev libghc-attoparsec-dev \
      libghc-vector-dev libghc-temporary-dev \
      libghc-snap-server-dev libpcre3 libpcre3-dev hscolour hlint pandoc \
      python-setuptools python-sphinx python-epydoc graphviz python-pyparsing \
      python-simplejson python-pyinotify python-pycurl python-paramiko \
      python-bitarray python-ipaddr python-yaml qemu-utils python-coverage pep8 \
      shelltestrunner python-dev pylint openssh-client vim git git-email

;;
esac

echo "en_US.UTF-8 UTF-8" >> $CHDIR/etc/locale.gen

in_chroot -- \
  $APT_INSTALL sudo fakeroot rsync locales less socat

in_chroot -- \
  locale-gen

in_chroot -- \
  $APT_INSTALL lvm2 ssh bridge-utils iproute iputils-arping \
               ndisc6 python-openssl openssl \
               python-mock fping qemu-utils

in_chroot -- \
  easy_install affinity

in_chroot -- \
  $APT_INSTALL \
  python-epydoc debhelper quilt

# extra debian packages

for package in $CHROOT_EXTRA_DEBIAN_PACKAGES
do in_chroot -- \
  $APT_INSTALL $package
done

#Set default editor
in_chroot -- \
  update-alternatives --set editor $ALTERNATIVE_EDITOR

# Final user hook

in_chroot -- $CHROOT_FINAL_HOOK

rm -f $COMP_FILEPATH
echo "Creating compressed schroot image..."
cd $CHDIR
tar czf $COMP_FILEPATH ./*
cd $ROOT

rm -rf $CHDIR
rm -f $TEMP_CHROOT_CONF
rm -rf $TEMP_DATA_DIR

echo "Chroot created. In order to run it:"
echo " * Copy the file $FINAL_CHROOT_CONF to $CONF_DIR/$FINAL_CHROOT_CONF"
echo " * Copy the file $COMP_FILEPATH to $CHROOT_DIR/$COMP_FILENAME"
echo "Then run \"schroot -c $CHROOTNAME\""