Auto generate atlantis.yaml file for terraform repository

generate_atlantis_yaml.sh

#!/bin/bash

# Run this file at the root level of your terraform repo to generate your basic atlantis.yaml file
# This file is somewhat specific to my needs so it will probably need some tweaking for your own terraform setup

ATLANTIS_YAML="atlantis.yaml"
TERRAFORM_VERSION="v0.11.11"
WORKSPACES="dev tst stg prd"

touch ${ATLANTIS_YAML}

echo "version: 3" > ${ATLANTIS_YAML}
echo "automerge: false" >> ${ATLANTIS_YAML}
echo "projects:" >> ${ATLANTIS_YAML}

function get_module_sources() {
  grep -ris source "${1}"/*.tf | grep -os "source *= .*" | sed 's/source *= //g' | sort | uniq | xargs
}

add_sources() {
    local PARENT_MODULE_PATH=$1
    local CHILD_MODULE_PATHS=$(get_module_sources "${PARENT_MODULE_PATH}")
    for CHILD_MODULE_PATH in ${CHILD_MODULE_PATHS}; do

      # TODO: 1. condense paths for cleanliness
      # TODO: 2. check if PATH already exists and do not add duplicates.
      SOURCES+="\"${PARENT_MODULE_PATH}/${CHILD_MODULE_PATH}/**/*.tf\","

      add_sources "${PARENT_MODULE_PATH}/${CHILD_MODULE_PATH}"
    done
  }

find workspaces | grep "tf$" | xargs -I % dirname % | sort | uniq | grep -v .terraform | while read line; do

  SOURCES_RAW=$(get_module_sources "${line}")

  export SOURCES=""

  add_sources "${line}"

  substring="${line}/"
  SOURCES=${SOURCES//${substring}/}

  SOURCES+="\"*.tf*\""

  if [[ -z "$var" ]]
    then
      for env in ${WORKSPACES}; do
        if [[ ${line} =~ /${env}/ ]]
          then
            echo "Adding entry for ${line} with sources: $SOURCES"
            {
              echo "  - dir: ${line}"
              echo "    workspace: ${env}"
              echo "    terraform_version: ${TERRAFORM_VERSION}"
              echo "    autoplan:"
              echo "      when_modified: [${SOURCES}]"
              echo "      enabled: true"
            } >> ${ATLANTIS_YAML}
        fi
      done
  fi
done