Add RTL support for Slack on Mac

slack_rtl_support_mac.sh

# Prerequisites: Node.js
# Node.js can be installed using brew (https://brew.sh/) by running:
# brew install node

sudo echo "Killing Slack"
kill -9 $(ps aux | grep 'Slack' | awk '{print $2}')

echo "Installing asar"
npm install -g asar

cd /Applications/Slack.app/Contents/Resources

echo "Creating temporary directory to extract the source code into"
mkdir temp-sourcecode

echo "Extracting Slack’s source code"
sudo asar extract app.asar temp-sourcecode

echo "Editing Slack’s source code to add RTL support"
sudo tee -a temp-sourcecode/src/stat-cache.js 1>/dev/null <<EOL

if (typeof window !== 'undefined') {
	window.addEventListener('DOMContentLoaded', function() {
		jQuery('body').bind('DOMSubtreeModified', function() {
		    jQuery('.ql-editor, .c-message__body').attr('dir', 'auto').css('text-align', 'left');
		});
	}, false);
}

EOL

echo "Repacking Slack’s source code"
sudo asar pack temp-sourcecode app.asar

echo "Deleting temporary directory"
sudo rm -rf temp-sourcecode

cd ~

echo "Reopening Slack"
open /Applications/Slack.app