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|
#!/bin/sh
#
# Copyright (c) 2017-2018 Aaron LI <aly@aaronly.me>
# MIT License
#
# Tool to update a DragonFly BSD system using binary releases or
# snapshot builds.
#
set -e
DEBUG=${DEBUG:-""}
NAME="dfly-update"
VERSION="0.?.?"
TOOLDIR="${0%/*}"
PREFIX="${PREFIX:-${TOOLDIR}}"
CONFIGFILE="${PREFIX}/${NAME}.conf"
#
# Error Codes
#
EC_OS=10
EC_TMPFILE=11
EC_MD5=12
#
# Default Configurations
#
# Base URL to Remote DragonFly BSD images
URL_BASE="https://mirror-master.dragonflybsd.org"
URL_DEVELOPMENT="${URL_BASE}/snapshots/x86_64/images"
URL_RELEASE="${URL_BASE}/iso-images"
# Default to track the same branch as the installed system
UPDATE_BRANCH=
#
# Helper Functions
#
debug() {
[ -n "${DEBUG}" ] && echo "DEBUG: $@" >&2
}
warn() {
echo "WARNING: $@" >&2
}
error() {
echo "ERROR: $@" >&2
}
check_os() {
local os=$(uname -s)
if [ "${os}" != "DragonFly" ]; then
error "Not a DragonFly BSD system!"
exit ${EC_OS}
fi
}
# Get the branch of the installed system
# * DEVELOPMENT
# * RELEASE
get_local_branch() {
check_os || exit $?
uname -r | awk -F'-' '{ print $2 }'
}
# Get the version of local installed system
get_local_version() {
check_os
local version=$(uname -v | awk '{ print $2 }')
echo "${version}" | awk -F'-' '{ print $1 }' | tr -d 'v'
}
# Get the latest remote system image
# Returns:
# "_filename='<latest.iso/img>'; _md5='<md5/of/latest.iso/img>'"
get_latest_image() {
local latest_filename latest_md5 line
if [ "${branch}" = "DEVELOPMENT" ]; then
url_checksum="${URL_DEVELOPMENT}/CHECKSUM.MD5"
else
url_checksum="${URL_RELEASE}/md5.txt"
fi
local branch="$1"
local url_checksum=$(get_md5list_url ${branch})
local tmpchecksum=$(mktemp -t ${NAME}) || \
exit ${EC_TMPFILE}
echo "Fetch remote systems checksum: ${url_checksum}" >&2
fetch -o ${tmpchecksum} "${url_checksum}"
if [ "${branch}" = "DEVELOPMENT" ]; then
line=$(fgrep '.img.bz2' ${tmpchecksum} | tail -n 1)
else
line=$(fgrep '.img.bz2' ${tmpchecksum} | \
fgrep -v 'gui-' | tail -n 1)
fi
latest_filename=$(echo "${line}" | awk -F'[()]' '{ print $2 }')
latest_md5=$(echo "${line}" | awk '{ print $4 }')
rm -f ${tmpchecksum}
debug "_filename='${latest_filename}'; _md5='${latest_md5}'"
echo "_filename='${latest_filename}'; _md5='${latest_md5}'"
}
# Extract the version from image filename
get_version_filename() {
if [ "${branch}" = "DEVELOPMENT" ]; then
local branch="$1"
local filename="$2"
local version
version=$(echo "${filename}" | cut -d'-' -f5 | cut -d'.' -f1-5)
else
version=$(echo "${filename}" | cut -d'-' -f3 | cut -d'_' -f1)
version=${version#v}
fi
echo ${version}
}
# Compare between two version strings
# Parameters: ver1 ver2
# Returns values:
# * 0 : ver1 = ver2
# * 1 : ver1 < ver2
# * 2 : ver1 > ver2
compare_version() {
local ver1="$1"
local ver2="$2"
local ver_low=$(echo -e "${ver1}\n${ver2}" | sort -V | head -n 1)
if [ "${ver1}" = "${ver2}" ]; then
echo 0
elif [ "${ver1}" = "${ver_low}" ]; then
echo 1
else
echo 2
fi
}
#
# Sub-command functions
#
cmd_version() {
cat <<_EOF_
v${VERSION}
Aaron LI <aly@aaronly.me>
https://github.com/liweitianux/dfly-update
_EOF_
}
cmd_usage() {
cat <<_EOF_
dfly-update - DragonFly BSD update tool using binary release/snapshots
Usage:
help | --help | -h
Show this help.
version | --version | -v
Show version information of this tool.
status
Show local installed system version and remote available version.
_EOF_
echo
cmd_version
}
cmd_status() {
local branch version branch_remote version_remote has_update
branch=$(get_local_branch)
version=$(get_local_version)
if [ -z "${UPDATE_BRANCH}" ]; then
branch_remote=${branch}
else
branch_remote=${UPDATE_BRANCH}
fi
eval "$(get_latest_image ${branch_remote})" || exit $?
version_remote=$(get_version_filename ${branch_remote} ${_filename})
cat <<_EOF_
Local installed system:
branch: ${branch}
version: ${version}
Remote available system:
branch: ${branch_remote}
version: ${version_remote}
_EOF_
has_update=$(compare_version ${version} ${version_remote})
if [ ${has_update} -eq 0 ]; then
echo "^_^ Your DragonFly is up-to-date ^_^"
elif [ ${has_update} -eq 1 ]; then
echo "!!! Your DragonFly needs update !!!"
else
echo "??? Your DragonFly is newer than remote ???"
fi
}
cmd_extension_or_status() {
case "$1" in
"")
cmd_status
;;
*)
echo "TODO..."
;;
esac
}
#
# Main
#
# Load configurations
[ -r "${CONFIGFILE}" ] && . ${CONFIGFILE}
COMMAND="$1"
case "${COMMAND}" in
version|--version|-v)
shift
cmd_version
;;
status)
shift
cmd_status "$@"
;;
help|--help|-h|*)
cmd_usage
;;
esac
exit 0
|
