path: root/localcowbuilder-fork

#!/bin/sh
set -x
#
# Copyright © 2006-2008 Jonas Smedegaard <dr@jones.dk>
# Description: Update Copy-On-Write environment
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307 USA.
#
# Depends: cowdancer, sudo

set -e

PRG=$(basename "$0")
LOCALMIRROR="deb http://127.0.0.1:9999/jones @@DIST@@ @@TOPIC@@"

showhelp() {
    cat <<EOF
Usage:   $PRG OLDPOOL POOL DISTRIBUTION [ OTHERMIRROR | LOCALTOPIC ]

Examples:
    $PRG sid sid-copy sid
    $PRG sid sid+mm sid 'deb http://debian-multimedia.org/ sid main'
    $PRG sid-ia32 sid-ia32+tweaks sid tweaks

OTHERMIRROR is a full APT line, LOCALTOPIC is expanded using the
following skeleton:

    $LOCALMIRROR

All APT sources are replaced: all original sources must be redeclared.
EOF
}

exit1() {
    echo "ERROR: $1"
    exit 1
}

ask() {
    echo -n "$1 (y/N)? "
    read response
    case "$response" in
        y|Y)
        :
        ;;
        *)
        return 1
        ;;
    esac
    return
}

if [ $# -lt 3 ]; then
    showhelp
    exit1 "not enough parameters"
fi

oldpool=
pool=
distro=
while [ $# -gt 0 ]; do
    case $1 in
        -h|--help)
            showhelp
            exit 0
            ;;
        --)
            shift
            break
            ;;
        --*|-*)
#           opts="$opts $1"
#           shift
            exit1 "options are curently unsupported"
            ;;
        *)
            if [ -z "$oldpool" ]; then
                oldpool="$1"
            elif [ -z "$pool" ]; then
                pool="$1"
            elif [ -z "$distro" ]; then
                distro="$1"
            else
                if echo "$1" | egrep -vq '[^[:blank:]][[:blank:]]+[^[:blank:]]'; then
                    mirror="$(echo "$LOCALMIRROR" | sed "s/@@DIST@@/$distro/g;s/@@TOPIC@@/$1/g")"
                else
                    mirror="$1"
                fi
                othermirrors="${othermirrors:+$othermirrors|}""$mirror"
            fi
            shift
            ;;
    esac
done

if [ -z "$oldpool" ]; then
    exit1 "no oldpool provided"
fi

if [ -z "$pool" ]; then
    exit1 "no pool provided"
fi

if [ -z "$distro" ]; then
    exit1 "no distribution provided"
fi

oldbasepath="/var/cache/pbuilder/cow-$oldpool"
basepath="/var/cache/pbuilder/cow-$pool"
aptcache=""
buildresult="$HOME/src/pbuild-$pool/"

[ -d "$oldbasepath" ] || \
    exit1 "oldpool \"$oldbasepath\" does not exist"

makepaths=''
for path in "$buildresult"; do
    if [ ! -d "$path" ]; then
        echo "W: Needed path \"$path\" does not exist"
        makepaths='yes'
    fi
done
if [ "$makepaths" = 'yes' ]; then
    [ "$force" = 'yes' ] \
        || ask 'Create the missing path(s)' \
        || exit1 "Cannot continue without those missing paths"
fi

if [ -d "$basepath" ]; then
    echo "W: Needed path \"$path\" already exists"
    [ "$force" = 'yes' ] \
        || ask 'Remove the path' \
        || exit1 "Cannot continue with that path already there"
fi

mkdir -p "$buildresult"
sudo rm -rf "$basepath"
sudo cp -al "$oldbasepath" "$basepath"

export DEBIAN_FRONTEND="noninteractive"
export LANG=C

echo "$othermirrors" | perl -e "while (<>) {chomp; /\w/ and unshift @m, '--othermirror', \$_};"\
"exec 'sudo', 'cowbuilder', '--update', '--distribution', '$distro', '--basepath', '$basepath', '--aptcache', '$aptcache', '--override-config', @m"