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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 env variable
# If no version is given, it falls back to the value of DEFAULT_MILL_VERSION
DEFAULT_MILL_VERSION=0.9.12
set -e
if [ -z "$MILL_VERSION" ] ; then
if [ -f ".mill-version" ] ; then
MILL_VERSION="$(head -n 1 .mill-version 2> /dev/null)"
elif [ -f "mill" ] && [ "$BASH_SOURCE" != "mill" ] ; then
MILL_VERSION=$(grep -F "DEFAULT_MILL_VERSION=" "mill" | head -n 1 | cut -d= -f2)
else
MILL_VERSION=$DEFAULT_MILL_VERSION
fi
fi
if [ "x${XDG_CACHE_HOME}" != "x" ] ; then
MILL_DOWNLOAD_PATH="${XDG_CACHE_HOME}/mill/download"
else
MILL_DOWNLOAD_PATH="${HOME}/.cache/mill/download"
fi
MILL_EXEC_PATH="${MILL_DOWNLOAD_PATH}/${MILL_VERSION}"
version_remainder="$MILL_VERSION"
MILL_MAJOR_VERSION="${version_remainder%%.*}"; version_remainder="${version_remainder#*.}"
MILL_MINOR_VERSION="${version_remainder%%.*}"; version_remainder="${version_remainder#*.}"
if [ ! -x "$MILL_EXEC_PATH" ] ; then
mkdir -p $MILL_DOWNLOAD_PATH
if [ "$MILL_MAJOR_VERSION" -gt 0 ] || [ "$MILL_MINOR_VERSION" -ge 5 ] ; then
ASSEMBLY="-assembly"
fi
DOWNLOAD_FILE=$MILL_EXEC_PATH-tmp-download
MILL_DOWNLOAD_URL="https://github.com/lihaoyi/mill/releases/download/${MILL_VERSION%%-*}/$MILL_VERSION${ASSEMBLY}"
curl --fail -L -o "$DOWNLOAD_FILE" "$MILL_DOWNLOAD_URL"
chmod +x "$DOWNLOAD_FILE"
mv "$DOWNLOAD_FILE" "$MILL_EXEC_PATH"
unset DOWNLOAD_FILE
unset MILL_DOWNLOAD_URL
fi
unset MILL_DOWNLOAD_PATH
unset MILL_VERSION
exec $MILL_EXEC_PATH "$@"
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