Find used and unused environment variables in .env file

find_use_env_vars.rb

#!/usr/bin/env ruby
#Run this in the root of your local github repo to find used env vars located in .env file
vars = File.readlines('.env')
keys = vars.map{|e| e[/^\w+/]}.compact.sort
used_keys = keys.select{|k| !`git grep #{k}`.empty? rescue nil}
puts "THESE ARE USED IN THE PROJECT\n\n"
puts used_keys
puts "\nThese env vars NOT used in codebase\n\n"
puts keys - used_keys

Hello, I propose ignoring the .env file itself from the git grep, or else everything is considered to be used in the project:

#!/usr/bin/env ruby
#Run this in the root of your local github repo to find used env vars located in .env file
vars = File.readlines('.env')
keys = vars.map{|e| e[/^\w+/]}.compact.sort
used_keys = keys.select{|k| puts k;!`git grep #{k} ':!.env'`.empty? rescue nil}
puts "THESE ARE USED IN THE PROJECT\n\n"
puts used_keys
puts "\nThese env vars NOT used in codebase\n\n"
puts keys - used_keys