script for turning env-vars into config.js

#!/bin/bash

# We use this file to translate environmental variables to .env files used by the application

set -e

function create_document_string () {

    IFS=',' read -ra doc_array <<< "$DOCUMENTS"

    document_string="{"

    for i in "${doc_array[@]}"

    do

        IFS='=' read -ra document <<< "$i"

        document_string+="\"${document[0]}\": \"${document[1]}\","

    done

    # Remove trailing "," 

    [[ "$document_string" == *, ]] && document_string=${document_string::${#document_string}-1}

    document_string+="}"

    echo $document_string

}

document_string=$(create_document_string)

echo "

{

  \"host\": \"$HOST\",

  \"port\": ${PORT},

  \"keyLength\": $KEY_LENGTH,

  \"maxLength\": $MAX_LENGTH,

  \"staticMaxAge\": $STATIC_MAX_AGE,

  \"recompressStaticAssets\": $RECOMPRESS_STATIC_ASSETS,

  \"logging\": [

    {

      \"level\": \"$LOGGING_LEVEL\",

      \"type\": \"$LOGGING_TYPE\",

      \"colorize\": $LOGGING_COLORIZE

    }

  ],

  \"keyGenerator\": {

    \"type\": \"$KEYGENERATOR_TYPE\"

  },

  \"rateLimits\": {

    \"categories\": {

      \"normal\": {

        \"totalRequests\": $RATELIMITS_NORMAL_TOTAL_REQUESTS,

        \"every\": $RATELIMITS_NORMAL_EVERY_SECONDS

      },

      \"whitelist\": {

        \"totalRequests\": $RATELIMITS_WHITELIST_TOTAL_REQUESTS,

        \"every\": $RATELIMITS_WHITELIST_EVERY_SECONDS

      },

      \"blacklist\": {

        \"totalRequests\": $RATELIMITS_BLACKLIST_TOTAL_REQUESTS,

        \"every\": $RATELIMITS_BLACKLIST_EVERY_SECONDS

      }

    }

  },

  \"storage\": {

    \"type\": \"$STORAGE_TYPE\",

    \"host\": \"$STORAGE_HOST\",

    \"port\":  $STORAGE_PORT,

    \"expire\": $STORAGE_EXPIRE_SECONDS,

    \"db\": $STORAGE_DB

  },

  \"documents\": $document_string

}

" > config.js

exec "$@"

 No newline at end of file