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#!/bin/sh
#
# Simple wrapper for debootstrap, run in the docker build context
#
FAKEROOT=`which fakeroot 2> /dev/null`
# debootstrap < 1.0.67 generates empty sources.list, see Debian#732255
MIN_DEBOOTSTRAP_VERSION=1.0.67
exit_and_skip()
{
exit 3
}
#
# fakeroot is needed to run the bootstrap stage
#
if [ -z $FAKEROOT ]; then
echo "Please install fakeroot to enable bootstraping" >&2
exit_and_skip
fi
if [ -z "${DEB_ARCH}" ]; then
echo "Please set DEB_ARCH to choose an architecture (e.g. armhf)" >&2
exit_and_skip
fi
if [ -z "${DEB_TYPE}" ]; then
echo "Please set DEB_TYPE to a Debian archive name (e.g. testing)" >&2
exit_and_skip
fi
# We check in order for
#
# - DEBOOTSTRAP_DIR pointing at a development checkout
# - PATH for the debootstrap script (installed)
#
# If neither option works then we checkout debootstrap from its
# upstream SCM and run it from there.
#
if [ -z $DEBOOTSTRAP_DIR ]; then
NEED_DEBOOTSTRAP=false
DEBOOTSTRAP=`which debootstrap 2> /dev/null`
if [ -z $DEBOOTSTRAP ]; then
echo "No debootstrap installed, attempting to install from SCM"
NEED_DEBOOTSTRAP=true
elif ! (echo "${MIN_DEBOOTSTRAP_VERSION}" ; "${DEBOOTSTRAP}" --version \
| cut -d ' ' -f 2) | sort -t . -n -k 1,1 -k 2,2 -k 3,3 -c &>/dev/null; then
echo "debootstrap too old, attempting to install from SCM"
NEED_DEBOOTSTRAP=true
fi
if $NEED_DEBOOTSTRAP; then
DEBOOTSTRAP_SOURCE=https://anonscm.debian.org/git/d-i/debootstrap.git
git clone ${DEBOOTSTRAP_SOURCE} ./debootstrap.git
export DEBOOTSTRAP_DIR=./debootstrap.git
DEBOOTSTRAP=./debootstrap.git/debootstrap
fi
else
DEBOOTSTRAP=${DEBOOTSTRAP_DIR}/debootstrap
if [ ! -f $DEBOOTSTRAP ]; then
echo "Couldn't find script at ${DEBOOTSTRAP}" >&2
exit_and_skip
fi
fi
#
# Finally check to see if any qemu's are installed
#
BINFMT_DIR=/proc/sys/fs/binfmt_misc
if [ ! -e $BINFMT_DIR ]; then
echo "binfmt_misc needs enabling for a QEMU bootstrap to work" >&2
exit_and_skip
else
# DEB_ARCH and QEMU arch names are not totally aligned
case "${DEB_ARCH}" in
amd64)
QEMU=qemu-i386
;;
armel|armhf)
QEMU=qemu-arm
;;
arm64)
QEMU=qemu-aarch64
;;
powerpc)
QEMU=qemu-ppc
;;
ppc64el)
QEMU=qemu-ppc64le
;;
s390)
QEMU=qemu-s390x
;;
*)
QEMU=qemu-${DEB_ARCH}
;;
esac
if [ ! -e "${BINFMT_DIR}/$QEMU" ]; then
echo "No binfmt_misc rule to run $QEMU, can't bootstrap" >&2
exit_and_skip
fi
fi
echo "Building a rootfs using ${FAKEROOT} and ${DEBOOTSTRAP} ${DEB_ARCH}/${DEB_TYPE}"
${FAKEROOT} ${DEBOOTSTRAP} --variant=buildd --foreign --arch=$DEB_ARCH $DEB_TYPE . http://httpredir.debian.org/debian || exit 1
exit 0
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