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+# Create Debian Bootstrap Image
+#
+# This is intended to be pre-poluated by:
+# - a first stage debootstrap (see debian-bootstrap.pre)
+# - a native qemu-$arch that binfmt_misc will run
+FROM scratch
+
+# Add everything from the context into the container
+ADD . /
+
+# Patch all mounts as docker already has stuff set up
+RUN sed -i 's/in_target mount/echo not for docker in_target mount/g' /debootstrap/functions
+
+# Run stage 2
+RUN /debootstrap/debootstrap --second-stage
+
+# At this point we can install additional packages if we want
+# Duplicate deb line as deb-src
+RUN cat /etc/apt/sources.list | sed "s/deb/deb-src/" >> /etc/apt/sources.list
+RUN apt-get update
+RUN apt-get -y build-dep qemu
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+#!/bin/sh
+#
+# Simple wrapper for debootstrap, run in the docker build context
+#
+FAKEROOT=`which fakeroot 2> /dev/null`
+
+exit_and_skip()
+{
+ exit 3
+}
+
+#
+# fakeroot is needed to run the bootstrap stage
+#
+if [ -z $FAKEROOT ]; then
+ echo "Please install fakeroot to enable bootstraping"
+ 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
+ DEBOOTSTRAP=`which debootstrap 2> /dev/null`
+ if [ -z $DEBOOTSTRAP ]; then
+ echo "No debootstrap installed, attempting to install from SCM"
+ 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}"
+ exit_and_skip
+ fi
+fi
+
+#
+# Finally check to see if any qemu's are installed
+#
+BINFMT_DIR=/proc/sys/fs/binfmt_misc
+if [ ! -e $BINFMT_DIR ]; then
+ echo "binfmt_misc needs enabling for a QEMU bootstrap to work"
+ exit_and_skip
+else
+ # DEB_ARCH and QEMU arch names are not totally aligned
+ case "${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"
+ 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