Terraform: sensible diff for JSON objects

Terraform: sensible diff for JSON objects

# E.g. Terraform IAM policies

terraform plan |\
  grep ' policy: ' |\
  sed 's/ *policy: *"\(.*\)" => "\(.*\)"/FROM\n\1\n%\nTO\n\2\n%/' |\
  sed 's/\\n/\n/g' | sed 's/\\"/"/g' |\
  gsplit -d -l 1 -t % - diff && \
  diff -y diff00 diff01 && \
  rm diff0*

  
# - assumes one thing is being compared, but you can trigger the diffs
#   yourself to compare (diff00 and diff01 will be the first object, 
#   02 and 03 will be the second, etc)
# - Line 11 is crappy -- this is to parse characters and escapes from
#   the JSON, this would be better parsed through `print`
# - gsplit is GNU utils -- on GNU/Linux flavours you can sub for split