quarks/scripts/build.sh
2011-10-31 17:15:03 -07:00

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#!/bin/sh
# - builds a generic image from a stage3 tarball and portage snapshot
# - creates and uploads AMI
#
# based on work from JD Harrington https://github.com/psi/gentoo-aws
# and Matsuu Takuto https://gist.github.com/870789
#===============================================================================
GENTOO_MIRROR="http://gentoo.arcticnetwork.ca"
LOCAL_CACHE=/var/tmp
set -x
die() {
echo $@
exit 1
}
fetch_file() {
local URL=$1
local DIGEST=$2
FILE_NAME=$(basename ${URL})
MD5=$(curl -s -S ${DIGEST} | grep -o -E -e "^[0-9a-f]{32}\s*${FILE_NAME}$" | awk '{print $1}')
if [ -z ${MD5} ]; then
die "Unable to get checksum for ${FILE_NAME}, abort"
fi
# Do we have local copy
if [ -f ${LOCAL_CACHE}/${FILE_NAME} ]; then
# if we have local, correct copy use it
if [ $(md5sum ${LOCAL_CACHE}/${FILE_NAME} | awk '{print $1}') = ${MD5} ]; then
cp ${LOCAL_CACHE}/${FILE_NAME} .
return
else
echo "Invalid checksum for ${LOCAL_CACHE}/${FILE_NAME}, downloading new copy..."
fi
fi
wget -nc ${URL} || die "Cannot download ${URL}!"
if [ $(md5sum ${FILE_NAME} | awk '{print $1}') != ${MD5} ]; then
die "Invalid checksum for ${FILE_NAME}!"
fi
# Check if local cache is usable
if [ -d ${LOCAL_CACHE} ] && [ -w ${LOCAL_CACHE} ]; then
cp ${FILE_NAME} ${LOCAL_CACHE}
echo "Stored ${FILE_NAME} in local cache."
fi
}
# bootstrap ROOT_FS PROFILE ARCH
bootstrap() {
local ROOT_FS=$1
local PROFILE=$2
local ARCH=$3
local STAGE_PATH
local STAGE_ARCH
local LATEST_STAGE_FILE
local ESELECT_PROFILE
if [ "${ARCH}" = "i686" ] ; then
STAGE_ARCH=${ARCH}
# Why do they use x86 here ? :(
STAGE_PATH="${GENTOO_MIRROR}/releases/x86/autobuilds"
elif [ "${ARCH}" = "x86_64" ] ; then
STAGE_ARCH="amd64"
STAGE_PATH="${GENTOO_MIRROR}/releases/${STAGE_ARCH}/autobuilds"
else
die "Unknown architecture!"
fi
if [ "${PROFILE}" = "hardened" ] ; then
LATEST_STAGE_FILE="${STAGE_PATH}/latest-stage3-${STAGE_ARCH}-hardened.txt"
ESELECT_PROFILE="hardened/linux/${ARCH}"
elif [ "${PROFILE}" = "hardened-no-multilib" ] ; then
LATEST_STAGE_FILE="${STAGE_PATH}/latest-stage3-${STAGE_ARCH}-hardened+nomultilib.txt"
ESELECT_PROFILE="hardened/linux/${ARCH}/no-multilib"
elif [ "${PROFILE}" = "server" ] ; then
LATEST_STAGE_FILE="${STAGE_PATH}/latest-stage3-${STAGE_ARCH}.txt"
ESELECT_PROFILE="default/linux/${ARCH}/10.0/no-multilib"
else
die "Unknown profile!"
fi
STAGE_TARBALL=${GENTOO_MIRROR}/releases/${STAGE_ARCH}/autobuilds/$(curl -s ${LATEST_STAGE_FILE} | grep -v "^#" | head -n 1)
PORTAGE_SNAPSHOT="${GENTOO_MIRROR}/snapshots/portage-latest.tar.bz2"
[ -d ${ROOT_FS} ] || die "${ROOT_FS} does not exists"
[ -w ${ROOT_FS} ] || die "${ROOT_FS} isn't writable"
cd ${ROOT_FS}
if [ ! -d "usr" ] ; then
fetch_file "${STAGE_TARBALL}" "${STAGE_TARBALL}.DIGESTS"
tar jxpf stage3*.bz2 || die "Extracting stage file failed"
rm -f stage3*.bz2
fi
if [ ! -d "usr/portage" ] ; then
fetch_file "${PORTAGE_SNAPSHOT}" "${PORTAGE_SNAPSHOT}.md5sum"
tar jxf portage-latest.tar.bz2 -C "${ROOT_FS}/usr" || die "Extracting portage snapshot failed"
rm -f portage-latest.tar.bz2
fi
}
usage() {
cat << EOF
Usage: $0 [options]
This script builds a generic gentoo stage3 image
OPTIONS:
-h Show this message
-a arch, either i686 or x86_64, defaults to uname -m
-p profile, either hardened or hardened-no-multilib or server(default)
-t The timezone to use, default to GMT
-v Verbose
EOF
}
while getopts ":a:p:t:vh" OPTIONS; do
case $OPTIONS in
a ) ARCH=$OPTARG;;
p ) PROFILE=$OPTARG;;
t ) TIMEZONE=$OPTARG;;
v ) VERBOSE=1;;
? )
usage
exit
;;
esac
done
ARCH=${ARCH-"$(uname -m)"}
PROFILE=${PROFILE="server"}
TIMEZONE=${TIMEZONE-"GMT"}
bootstrap /opt/gentoo ${PROFILE} ${ARCH}