Returns a list of your gems and their licenses

gem-licenses.zsh

#!/bin/zsh

get_gems() {

  cat Gemfile |
    sed 's/^ *//' |
    sed -E '/^(group|end|source|#)/d' |
    sed '/^ *$/d' |
    sed "s/^gem ['\"]//" |
    sed "s/['\"].*$//" |
    grep -vE '(api_client|mobile_web)' |
    sort

}

get_licenses() {
  cd $GEM_HOME/gems
  for file in `get_license_files`; do
    license=`get_license $file`
    gem=`clean_gem_name $file`
    if [[ $license != "" ]]; then
      echo "$gem, $license"
    fi
  done
}

get_license_files() {
  find -E . -iregex '.*(license|readme).*'
}

get_license() {
  grep -iE '\b(MIT|GPL|ruby license|apache)\b' $1 | head -1 | sed -E "s/^[ \t]+//"
}

clean_gem_name() {
  echo $1 | sed 's#./##' | sed -E 's/-[0-9.]+.*$//'
}

get_gem_licenses() {
  gems=`get_gems`
  if [ ! -e '/tmp/licenses.txt' ]; then
    get_licenses | uniq > /tmp/licenses.txt
  fi

  get_gems | while read gem
  do
    license=`cat /tmp/licenses.txt | grep "^$gem,"`
    if [[ $license == "" ]]; then
      license="$gem, ???"
    fi
    echo "$license"
  done
  #for gem ($gems); do
    ##license=`echo $licenses | grep "^$gem,"`
    ##echo "[[[$gem]]], [[[$license]]]"
  #done
}

get_gem_licenses