tower-http-cache-plus 0.0.2

RED='\033[0;31m'
GREEN='\033[0;32m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
RESET='\033[0m'

# Colored messages (blue is the default)
# Examples:
#   m "hello world"
#   m "hello world" "$GREEN"
function m () {
	local COLOR=${2:-$BLUE}
	echo -e "$COLOR$1$RESET"
}

function howlong () {
	/usr/bin/time --format='...took %e seconds' "$@"
}

function copy_function () {
	local ORIG_FUNC=$(declare -f $1)
	local NEWNAME_FUNC="$2${ORIG_FUNC#$1}"
	eval "$NEWNAME_FUNC"
}

function git_version () {
	VERSION=$(git -C "$ROOT" describe --tags --always 2> /dev/null || echo '')
	SHORT_VERSION=$(git -C "$ROOT" describe --tags --always --abbrev=0 2> /dev/null || echo '')
	REVISION=$(git -C "$ROOT" rev-parse HEAD 2> /dev/null || echo '')
	TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S %Z")
	GO_VERSION=$(go version | { read _ _ v _; echo ${v#go}; })
}

function only_root () {
        if [ "$EUID" -ne 0 ]; then
                m "Run this script as root" "$RED"
                exit 1
        fi
}

function not_root () {
        if [ "$EUID" == 0 ]; then
                m "Do not run this script as root" "$RED"
                exit 1
        fi
}

function install_tool () {
	local NAME=$1
	local VERSION=$2
	local URL=$3
	local STRIP=${4:-1}
	local ARCHIVE_PREFIX=$5
	local EXEC=/usr/bin/$NAME

	if [ -f "$EXEC" ]; then
		if [ "$FORCE" == true ]; then
			m "overriding existing \"$EXEC\"..."
		else
			m "\"$EXEC\" already exists (use -f to overwrite)"
			return 0
		fi
	fi

	m "downloading $NAME $VERSION..."
	if [ "${URL: -7}" == .tar.gz ] || [ "${URL: -4}" == .tgz ]; then
		local ARCHIVE=$(mktemp --suffix=.tar.gz)
		if curl --silent --location --output "$ARCHIVE" "$URL"; then
			if tar --extract --file="$ARCHIVE" --directory=/usr/bin --strip="$STRIP" "$ARCHIVE_PREFIX$NAME"; then
				rm --force "$ARCHIVE"
			else
				m "could not write to \"$EXEC\"" "$RED"
				rm --force "$ARCHIVE"
			fi
		else
			m "could not download from \"$URL\"" "$RED"
			return
		fi
	else
		if ! curl --silent --location --output "$EXEC" "$URL"; then
			m "could not download from \"$URL\" to \"$EXEC\"" "$RED"
			return
		fi
	fi

	chmod a+x "$EXEC"
	m "installed \"$EXEC\""
}