pre-commit git hook, runs rspec if branch is master

pre-commit.rspec.rb

#!/usr/bin/env ruby

# pre-commit git hook
# will run rspec if and only if current branch is master
# script adapted from http://book.git-scm.com/5_git_hooks.html

# source : https://gist.github.com/1141992

NO_COMMIT_MESSAGE = "\aDID NOT COMMIT YOUR FILES!"
FORMAT = :html

# @params : Sym :html or other
def run_tests(format = :txt)
  format = format.to_sym
  html_path = "tmp/git_hook_spec_results.#{format}"
  `touch #{html_path}`
  # run the spec. send progress to screen and save results in html format to html_path if format is :html
  unless `rake -Tspec`.empty?
    puts "running rake spec"
    `rake spec SPEC_OPTS="-c #{ "-f h " if format == :html } -o #{html_path}" 1> /dev/null 2>/dev/null`
  else
    puts "running rspec"
    `rspec -c #{ "-f h " if format == :html } -o #{html_path} spec/ 1> /dev/null 2>/dev/null`
  end

  # find out how many errors were found
  results = open(html_path).read
  examples = results.match(/(\d+) examples?/)[0].to_i rescue 0
  failures = results.match(/(\d+) failures?/)[0].to_i rescue 0
  pending = results.match(/(\d+) pending/)[0].to_i rescue 0

  if failures.zero?
    puts "0 failures! #{examples} run, #{pending} pending"
  else
    puts NO_COMMIT_MESSAGE if format == :html
    puts "View spec results at #{File.expand_path(html_path)}" if format == :html
    puts "eg. use Firefox to see it : firefox #{File.expand_path(html_path)}" if format == :html
    puts
    puts "#{failures} failures! #{examples} run, #{pending} pending" if format == :html

    puts; puts results unless format == :html
    puts; puts NO_COMMIT_MESSAGE unless format == :html 

    exit 1
  end
end



#get current_branch
list_of_branches = `git branch`.split("\n")
current_branch = list_of_branches.find {|string| string.match /^\* /}.sub("* ", "")

if current_branch == 'master'
  puts "we are on branch master, running tests----"
  defined?(FORMAT) ? run_tests(FORMAT) : run_tests
  puts "---------------------------------end tests"
end

pre-commit.rspec.sh

#!/usr/bin/env bash

# Can use this in an IDE it can't load rvm environment.
# and charge the rvm environment.
# When you use git only in shell commands, ruby script 'pre-commit.rspec.rb' is enough. You only need to move it to pre-commit.
# If you want use this, move it to pre-commit, otherwise move pre-commit.rspec.rb to pre-commit.

if [[ -s "$HOME/.rvm/scripts/rvm" ]] ; then

  # First try to load from a user install
  source "$HOME/.rvm/scripts/rvm"

elif [[ -s "/usr/local/rvm/scripts/rvm" ]] ; then

  # Then try to load from a root install
  source "/usr/local/rvm/scripts/rvm"

else

  printf "ERROR: An RVM installation was not found.\n"

fi

rvm reload
ruby .git/hooks/pre-commit.rspec.rb