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#!/bin/sh
# bootstrap an alpine installation
VERSION=@VERSION@
usage() {
echo "usage: $(basename $0) TARGETDIR"
exit 2
}
die () {
echo "$@" >&2
exit 3
}
# set up vars
: ${WGET:="/usr/bin/wget"}
: ${TAR:="/usr/bin/tar"}
: ${MIRROR:="http://dev.alpinelinux.org/alpine/v1.7"}
: ${BASE:="base.tar.bz2"}
target=$1
# main
[ -z "$target" ] && usage
[ "$target" = "/" ] && die "Bootstrapping Alpine to '/' is probably not a good idea. Aborting..."
mkdir -p "$target"
echo ">>> Fetching $MIRROR/$BASE..."
$WGET -q -O - "$MIRROR/$BASE" | tar -C "$target" -jx || die "Failed to fetch or unpack $BASE"
echo ">>> Creating missing dirs..."
for dir in proc sys dev home; do
mkdir -p "$target/$dir"
done
echo ">>> Installing busybox links..."
# create fake /proc/self/exe
mkdir -p "$target/proc/self"
ln -s /bin/busybox "$target/proc/self/exe"
chroot "$target" /bin/busybox --install -s
rm -r "$target/proc/self"
if [ -f /etc/resolv.conf ]; then
echo ">>> Copying /etc/resolv.conf..."
cp /etc/resolv.conf "$target/etc/"
fi
echo ">>> Setting up APK_PATH..."
echo "export APK_PATH=$MIRROR/apks" >> "$target/etc/profile"
echo ">>> Alpine bootstrap complete."
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