Terraform 0.12 syntax migration

tf012.sh

#!/bin/bash

#
# Replaces certain (simpler) occurences of Interpolation-only expressions,
# which are deprecated in Terraform 0.12
#


# works on MacOS sed, no clue if I have GNU sed or BSD sed.. it doesn't want to tell me...
SED_CMD="sed -i.bak -E "

for file in $(find . -name *.tf -not -path "*.terraform/*"); do
  echo $file


  # var.name
  $SED_CMD 's/"\$\{(var\.[0-9a-zA-Z_-]+)\}"/\1/g' $file
  # var.name["index"]
  $SED_CMD 's/"\$\{(var\.[0-9a-zA-Z_-]+\["[0-9a-zA-Z_-]+"\])\}"/\1/g' $file
  # local.name
  $SED_CMD 's/"\$\{(local\.[0-9a-zA-Z_-]+)\}"/\1/g' $file
  # local.name["index"]
  $SED_CMD 's/"\$\{(local\.[0-9a-zA-Z_-]+\["[0-9a-zA-Z_-]+"\])\}"/\1/g' $file
  # data.type.name.attribute
  $SED_CMD 's/"\$\{(data\.[0-9a-zA-Z_-]+\.[0-9a-zA-Z_-]+\.[0-9a-zA-Z_-]+)\}"/\1/g' $file
  # data.type.name.*.attribute
  $SED_CMD 's/"\$\{(data\.[0-9a-zA-Z_-]+\.[0-9a-zA-Z_-]+\.\*\.[0-9a-zA-Z_-]+)\}"/\1/g' $file
  # module.name.attribute
  $SED_CMD 's/"\$\{(module\.[0-9a-zA-Z_-]+\.[0-9a-zA-Z_-]+)\}"/\1/g' $file
  # some_resource.name.attribute
  $SED_CMD 's/"\$\{([0-9a-zA-Z_-]+\.[0-9a-zA-Z_-]+\.[0-9a-zA-Z_-]+)\}"/\1/g' $file

  # function(some.thing).. a never ending story..
  # $SED_CMD 's/"\$\{([a-z]+\([0-9a-zA-Z_-]+(\.[0-9a-zA-Z_-]+)+\))\}"/\1/g' $file

#  echo Continue?
#  read

done

find . -name *.bak | xargs rm