Find unused SCSS variables. Usage: `./find-unused-sass-variables.sh sassDir/`

find-unused-sass-variables.sh

#!/usr/bin/env bash
#
# Approach:
# 1. Find variable declaration in the form of "$my-var: anyvalue"
# 2. Loop through found variables and find occurrences of each variable in all sass files
# 3. Filter out vars that occurred only once

if [ -z "$1" ]; then
	echo "Please specify a directory as the first argument."
	exit 1
fi
if [ ! -d "$1" ]; then
	echo "Not a valid directory."
	exit 1
fi

echo "Finding unused variables. This might take some time..."

vars=$(find "$1" -type f -name "*.scss" -exec grep --color=never -nH '^$[a-zA-Z0-9_-]*[^:]' {} \; | sed 's/$\([a-zA-Z0-9_-]*[^:]\).*/\1/')
#echo $vars
for var in $vars; do
	file=$(echo $var | cut -d \: -f 1)
	line=$(echo $var | cut -d \: -f 2)
	varname=$(echo $var | cut -d \: -f 3)
	echo -n "file:\"$file\", [line:$line], \$$varname :"
	find "$1" -type f -name "*.scss" -exec cat -n "{}"  \; |  grep "$varname[^a-z]" | wc -l
done | grep ' 1$'