Install or Update Dart Sass in linux system.

update-dart-sass.sh

#!/usr/bin/env bash


# Script to update dart-sass from official github release.
# Copyright (C) 2021 Abhinav Kulshreshtha 

# Changelog
# 26th january 2024 fix for new URL format and recommended binary path practice.
# 05th october 2021 "updated with proper url"


# Permission to copy and modify is granted under the terms of WTFPL-2 license.
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.


# --------------------------------------------
# This script currently works with github api version 2
# use of 'jq' has been removed for more portability.
# 
# This script will install latest dart-sass globally without user interaction.
# --------------------------------------------



# SUDO check
if [ "$(id -u)" -ne 0 ]; then
        echo 'This script must be run by root' >&2
        exec sudo bash $(pwd)/"$0" $(pwd)/"$@"
fi

# some common variables

GITHUB_RELEASES_URL="https://api.github.com/repos/sass/dart-sass/releases/latest"
URL=""
KERNEL=$(uname -m)

case "$KERNEL" in
	"x86_64") KERNEL_VERSION="x64" ;;
*) KERNEL_VERSION="ia32" ;;
esac

# Get the latest release version of dart.
function checkUpdate {

	LATEST_VERSION=$(curl -s $GITHUB_RELEASES_URL | grep -i tag_name | awk '{ print $2; }' | head -n 1 |  sed 's/\"//g'|  sed 's/,//g')

	echo "Latest version found is $LATEST_VERSION"

}

function installLatest {

	URL=$(curl -s $GITHUB_RELEASES_URL | grep -i browser_download_url | grep -i linux-$KERNEL_VERSION.tar.gz | awk '{ print $2; }' | head -n 1 | sed 's/\"//g')
	FILE=${URL##*/}

	CACHEDIR="/tmp/dart-sass"
	DESTINATION="/usr/bin/sass"
	mkdir -p "$CACHEDIR" && cd "$CACHEDIR"

	echo "Downloading file in $CACHEDIR"
	wget -c "$URL" -O "$FILE"

	if [[ ! -f "$FILE" ]]; then
		exit 1
	fi

	# tar -xf "$FILE" --strip 1
	echo "Extracting file in $CACHEDIR"
	tar -xf -- "$FILE" # new binaries need to be at top level

	# sudo mv sass $DESTINATION
	
	echo "Moving folder dart-sass to /usr/bin"
	sudo mv -- dart-sass /usr/bin

	echo "linking /usr/bin/dart-sass/sass to /usr/bin/sass"
	
	sudo ln -s -- /usr/bin/dart-sass/sass $DESTINATION 
	
	echo "applying execute permission to /usr/bin/sass"
	sudo chmod +x $DESTINATION

	echo "--------------------------"
	echo "Update completed..."


}


if command -v sass &> /dev/null; then

	CURRENT_VERSION=$(sass --version)
	echo "dart-sass installation is found, current version is $CURRENT_VERSION"
	
	checkUpdate
	
	if [[ "$CURRENT_VERSION" != "$LATEST_VERSION" ]]; then

		echo "update is available"
		installLatest
		exit

	else
		echo "Nothing to do"; exit
	fi

else

	echo "dart sass not found"
	echo "dart-sass will be installed at /usr/bin/sass"
	echo "--------------------------"
	echo ""
	checkUpdate
	installLatest
	exit

fi

# TODO: Add command line parameters for more control of behaviour.