Attempts to add braces around quoted interpolated strings in puppet.

puppet_interp.sh

#!/bin/sh
#
# Attempts to add braces around quoted interpolated strings in puppet.
#
# Caveats
#
# This is a lot of sed and duct tape. It is not very smart. It's probably the
# most horrible regex I've ever written.
# I'm sorry.

if [[ $# == 0 ]]; then
  echo "usage: $0 manifest.pp [manifest.pp ...]"
  exit 1
fi

trap 'exit 1' SIGINT SIGTERM

for manifest in $@; do

  sed -i.bak -e \
  ":BEGIN
  /\"[^\"']*[^\\]\$[[:alnum:]_:].*\"/ \
  s/\(\"[^\"]*\)\$\([[:alnum:]_:][[:alnum:]_:]*\)\([^\"]*\"\)/\1$\{\2\}\3/
  t BEGIN" $manifest
  diff "${manifest}.bak" $manifest 2>/dev/null 1>/dev/null

  if [[ $? == 1 ]]; then
    echo "Patched manifest ${manifest}"
    diff -U 1 "${manifest}.bak" $manifest

    echo "Validating manifest syntax"
    puppet parser validate $manifest
  else
    rm ${manifest}.bak
  fi
done