old2new, the Ruby hash syntax updater

old2new.zsh

# This script has been tested with zsh 5.2 on macOS 10.12.3 with BSD sed and find.
# It may work under other conditions, but likely does not.

# old2new, the Ruby hash syntax updating function
# Takes the given files and replaces all instances of `:key => value` with the equivalent `key: value`
# Usage: old2new <path>
# NOTE: <path> can be a file or directory
function old2new() {
  find $argv \( -name "*.haml" -or -name "*.rb" -or -name "*.erb" \) -exec sed -E -i '' 's/:([A-z]+) =>/\1:/g' '{}' \;
}