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millw
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millw
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#!/usr/bin/env sh
# This is a wrapper script, that automatically download mill from GitHub release pages
# You can give the required mill version with --mill-version parameter
# If no version is given, it falls back to the value of DEFAULT_MILL_VERSION
#
# Project page: https://github.com/lefou/millw
#
# If you want to improve this script, please also contribute your changes back!
#
# Licensed under the Apache License, Version 2.0
DEFAULT_MILL_VERSION=0.5.7
set -e
# Explicit commandline argument takes precedence over all other methods
if [ "x$1" = "x--mill-version" ] ; then
shift
if [ "x$1" != "x" ] ; then
MILL_VERSION="$1"
shift
else
echo "You specified --mill-version without a version."
echo "Please provide a version that matches one provided on"
echo "https://github.com/lihaoyi/mill/releases"
false
fi
fi
# Please note, that if a MILL_VERSION is already set in the environment,
# We reuse it's value and skip searching for a value.
# If not already set, read .mill-version file
if [ "x${MILL_VERSION}" = "x" ] ; then
if [ -f ".mill-version" ] ; then
MILL_VERSION="$(head -n 1 .mill-version 2> /dev/null)"
fi
fi
if [ "x${XDG_CACHE_HOME}" != "x" ] ; then
MILL_DOWNLOAD_PATH="${XDG_CACHE_HOME}/mill/download"
else
MILL_DOWNLOAD_PATH="${HOME}/.cache/mill/download"
fi
# If not already set, try to fetch newest from Github
if [ "x${MILL_VERSION}" = "x" ] ; then
# TODO: try to load latest version from release page
echo "No mill version specified."
echo "You should provide a version via '.mill-version' file or --mill-version option."
mkdir -p "${MILL_DOWNLOAD_PATH}"
LANG=C touch -d '1 hour ago' "${MILL_DOWNLOAD_PATH}/.expire_latest"
if [ "${MILL_DOWNLOAD_PATH}/.latest" -nt "${MILL_DOWNLOAD_PATH}/.expire_latest" ] ; then
# we know a current latest version
MILL_VERSION="$(head -n 1 ${MILL_DOWNLOAD_PATH}/.latest 2> /dev/null)"
fi
if [ "x${MILL_VERSION}" = "x" ] ; then
# we don't know a current latest version
echo "Retrieving latest mill version ..."
LANG=C curl -s -i -f -I https://github.com/lihaoyi/mill/releases/latest 2> /dev/null | grep Location: | sed s'/^.*tag\///' | tr -d '\r\n' > "${MILL_DOWNLOAD_PATH}/.latest"
MILL_VERSION="$(head -n 1 ${MILL_DOWNLOAD_PATH}/.latest 2> /dev/null)"
fi
if [ "x${MILL_VERSION}" = "x" ] ; then
# Last resort
MILL_VERSION="${DEFAULT_MILL_VERSION}"
echo "Falling back to hardcoded mill version ${MILL_VERSION}"
else
echo "Using mill version ${MILL_VERSION}"
fi
fi
MILL="${MILL_DOWNLOAD_PATH}/${MILL_VERSION}"
# If not already downloaded, download it
if [ ! -x "${MILL}" ] ; then
# support old non-XDG download dir
MILL_OLD_DOWNLOAD_PATH="${HOME}/.mill/download"
OLD_MILL="${MILL_OLD_DOWNLOAD_PATH}/${MILL_VERSION}"
if [ -x "${OLD_MILL}" ] ; then
MILL="${OLD_MILL}"
else
VERSION_PREFIX="$(echo -n $MILL_VERSION | cut -b -4)"
case $VERSION_PREFIX in
0.0. | 0.1. | 0.2. | 0.3. | 0.4. )
DOWNLOAD_SUFFIX=""
;;
*)
DOWNLOAD_SUFFIX="-assembly"
;;
esac
unset VERSION_PREFIX
DOWNLOAD_FILE=$(mktemp mill.XXXX)
# TODO: handle command not found
echo "Downloading mill ${MILL_VERSION} from https://github.com/lihaoyi/mill/releases ..."
curl -L -o "${DOWNLOAD_FILE}" "https://github.com/lihaoyi/mill/releases/download/${MILL_VERSION%%-*}/${MILL_VERSION}${DOWNLOAD_SUFFIX}"
chmod +x "${DOWNLOAD_FILE}"
mkdir -p "${MILL_DOWNLOAD_PATH}"
mv "${DOWNLOAD_FILE}" "${MILL}"
unset DOWNLOAD_FILE
unset DOWNLOAD_SUFFIX
fi
fi
unset MILL_DOWNLOAD_PATH
unset MILL_OLD_DOWNLOAD_PATH
unset OLD_MILL
unset MILL_VERSION
exec $MILL "$@"