get-heroku-commands.sh

#!/bin/bash

listOfCommands="addons
apps
auth
config
domains
logs
ps
releases
run
access
buildpacks
certs
drains
features
git
help
keys
labs
local
login
maintenance
members
notifications
orgs
pg
pgbackups
pipelines
plugins
redis
regions
sf
spaces
stack
status
update
version"

for topicCommand in $listOfCommands
do
	bash -c "heroku $topicCommand --help > a-$topicCommand.txt"
done

for i in ./a-*.txt
do
    str1="${i##*/}"

	while read p; do
	  
	  set -- $p

	  arr=(${1//:/ })

	  if [[ "${listOfCommands[@]}" =~ "${arr}" ]]; then
	  		echo $1
	  fi
	done <$str1

done