firefox-gnome-theme/scripts/install.sh

#!/bin/bash

THEMEDIRECTORY=$(cd `dirname $0` && cd .. && pwd)
FIREFOXFOLDER=~/.mozilla/firefox
PROFILENAME=""
THEME=DEFAULT

# Determine firefox profile being currently used programatically
# credits: https://stackoverflow.com/questions/57526217/
function current_profile() {
	pgrep firefox | xargs -I{} lsof -p {} 2>/dev/null | grep .parentlock |
	awk '{for(i=9;i<=NF;++i)printf $i""FS ; print ""}'  | cut -d'/' -f6
}


# Get options.
while getopts 'f:p:g:t:h' flag; do
	case "${flag}" in
	f) FIREFOXFOLDER="${OPTARG}" ;;
	p) PROFILENAME="${OPTARG}" ;;
	t) THEME="${OPTARG}" ;;
	h)
		echo "Gnome Theme Install Script:"
		echo "  -f <firefox_folder_path>. Set custom Firefox folder path."
		echo "  -p <profile_name>. Set custom profile name."
		echo "  -t <theme_name>. Set the colors used in the theme."
		echo "  -h to show this message."
		exit 0
		;;
	esac
done

# Define profile folder path.
if test -z "$PROFILENAME"
then
	PROFILEFOLDER="$FIREFOXFOLDER/$(current_profile)"
else
	PROFILEFOLDER="$FIREFOXFOLDER/$PROFILENAME"
fi

# Enter Firefox profile folder.
if ! cd $PROFILEFOLDER ; then
	echo "Error entering profile folder."
	echo "Try using -p flag to specify a custom profile name."
	exit 1
fi

echo "Installing theme in $PWD"

# Create a chrome directory if it doesn't exist.
mkdir -p chrome
cd chrome

# Copy theme repo inside
echo "Copying repo in $PWD"
cp -fR $THEMEDIRECTORY $PWD

# Create single-line user CSS files if non-existent or empty.
if [ -s userChrome.css ]; then
	# Remove older theme imports
	sed 's/@import "firefox-gnome-theme.*.//g' userChrome.css | sed '/^\s*$/d' > userChrome.css
	echo >> userChrome.css
else
	echo >> userChrome.css
fi

# Import this theme at the beginning of the CSS files.
sed -i '1s/^/@import "firefox-gnome-theme\/userChrome.css";\n/' userChrome.css

if [ $THEME = "DEFAULT" ]; then
	echo "No theme set, using default adwaita."
else
	echo "Setting $THEME theme."
	echo "@import \"firefox-gnome-theme\/theme/colors/light-$THEME.css\";" >> userChrome.css
	echo "@import \"firefox-gnome-theme\/theme/colors/dark-$THEME.css\";" >> userChrome.css
fi

cd ..

# Symlink user.js to firefox-gnome-theme one.
echo "Set configuration user.js file"
ln -fs chrome/firefox-gnome-theme/configuration/user.js user.js

echo "Done."