List all the different gems on your Gemfile.lock

gemcount

#!/bin/bash

print_gems() {
  awk '/([[:alnum:]_]+) \(/{ print $1 }' Gemfile.lock | sort -u 
}

count() {
  grep -c ^
}

if [ "$1" == "-c" ]; then
  print_gems | count
else
  print_gems
fi

$ cat Gemfile
source 'https://rubygems.org'
gem 'rails'

$ gemcount
actionmailer
actionpack
...

$ gemcount -c
36

I like grep -c ^ over wc -l as it doesn't print spaces ;-)