Watch file changes and run rspec for the test file or specified line number test. Use spring with rspec optionally.

.bash_profile

# It requries installed nodemon
#   $ npm install -g nodemon
#
# Add this in your ~/.bash_profile
#
# How to use it?
#
# Run spec for user_spec.rb when file changed.
#   $ wr spec/models/user_spec.rb
#
# Run spec for user_spec.rb:80 (only spec in line 80) when file changed.
#   $ wr spec/models/user_spec.rb 80
# 
# Use wsr if you want to run spring rspec to speed up. For instance:
#   $ wsr spec/models/user_spec.rb 80
function run_after_save {
  prefix=$1
  file=$2
  line=$3
  if [ -z "$line" ]; then
    nodemon -x "$prefix $file" -w "$file"
  else
    nodemon -x "$prefix $file:$line" -w "$file"
  fi
}
alias wsr='run_after_save "bundle exec spring rspec"'
alias wr='run_after_save "bundle exec rspec"'