updateMonOntapServiceCFTemplate

#!/bin/bash
#
# This script is used to update the CloudFormation template with the latest
# version of the Lambda function. It will also update the version number in
# the template.
#################################################################################

majorVersionNum=2
file="monitor_ontap_services.py"

tmpfile1=$(mktemp /tmp/tmpfile1.XXXXXX)
tmpfile2=$(mktemp /tmp/tmpfile2.XXXXXX)
trap "rm -f $tmpfile1 $tmpfile2" exit
#
# First get the monitoring code out of the CF template.
sed -e '1,\(#!/bin/python3(d' cloudformation.yaml > cloudformation.yaml.tmp
#
# Now get the Date and Version lines out of both files.
egrep -v '^          # Date:|^          # Version' cloudformation.yaml.tmp > $tmpfile1
sed -e 1d $file | egrep -v '^# Date:|^# Version:' > $tmpfile2

if diff -w $tmpfile1 $tmpfile2 > /dev/null; then
  echo "No changes to the monitor code."
  rm -f cloudformation.yaml.tmp
  rm -f $tmpfile1 $tmpfile2
  exit 0
fi
#
# Get the number of commits in the git history for the file to calculate the minor version number.
minorVersionNum="$(git log "$file" | egrep '^commit' | wc -l)"
if [ -z "$minorVersionNum" ]; then
  echo "Failed to calculate version number." 1>&2
  exit 1
fi

version="v${majorVersionNum}.${minorVersionNum}"
#
# Strip out the monitoring code.
sed -e '\(#!/bin/python3(,$d' cloudformation.yaml > cloudformation.yaml.tmp
#echo "        ZipFile: |" >> cloudformation.yaml.tmp
#
# Add the monitoring code to the CF template while updating the version and date.
cat "$file" | sed -e 's/^/          /' -e "s/%%VERSION%%/${version}/" -e "s/%%DATE%%/$(date +%Y-%m-%d-%H:%M:%S)/" >> cloudformation.yaml.tmp

echo "Updating cloudformation.yaml"
mv cloudformation.yaml.tmp cloudformation.yaml