#!/bin/sh -e
DIST="$1"
DIR="$2"
MIRROR="$3"

[ "$DIST" ] && [ "$DIR" ] && [ "$MIRROR" ] || {
    echo "Usage: $0 <dist> <directory> <mirror>" >&2
    exit 1
}

mkdir -p "$DIR"
debootstrap "$DIST" "$DIR" "$MIRROR"
chroot $DIR apt-get install locales

# debian_chroot
echo $DIST > $DIR/etc/debian_chroot

# hosts
echo "127.0.0.1 localhost.localdomain localhost" > $DIR/etc/hosts

# users
perl -naF: -e 'print if $F[2] >= 1000 and $F[2] < 2000' /etc/passwd >> $DIR/etc/passwd

# locale
chroot $DIR locale-gen $LANG

# bind mounts
if ! grep -q $DIR /etc/fstab; then
    cat <<EOF >> /etc/fstab

# $DIST chroot
/home/martin    $DIR/home/martin none    bind   0 0
/proc           $DIR/proc        none    bind   0 0
/sys            $DIR/sys         none    bind   0 0
/tmp            $DIR/tmp         none    bind   0 0
EOF
    mount $DIR/home
    mount $DIR/proc
    mount $DIR/sys
    mount $DIR/tmp
fi

# apt sources
if [ "$MIRROR" != "${MIRROR%file://}" ]; then
    MIRROR=http://archive.ubuntu.com/ubuntu
fi

cat <<EOF > $DIR/etc/apt/sources.list
deb     $MIRROR $DIST main restricted universe multiverse
deb-src $MIRROR $DIST main restricted universe multiverse
deb     $MIRROR $DIST-updates main restricted universe multiverse
deb-src $MIRROR $DIST-updates main restricted universe multiverse
deb     $MIRROR $DIST-proposed main restricted universe multiverse
deb-src $MIRROR $DIST-proposed main restricted universe multiverse
deb     $MIRROR $DIST-security main restricted universe multiverse
deb-src $MIRROR $DIST-security main restricted universe multiverse
EOF

chroot $DIR apt-get update

# common packages for development
chroot $DIR apt-get install -y build-essential fakeroot