Environment to property merger

A missing link between environment variables and JAVA .properties files.

Build

git clone https://github.com/trajakovic/environment-to-property-merger.git && cd ./environment-to-property-merger && ./gradlew assemble bootRepackage

Resulting jar is in ./build/libs

Usage

• $ PREFIX_THIS_IS_PROPERTY_FROM_ENVIRONMENT="Prefixed with PREFIX_, but case is ignored" \
      java -jar ./build/libs/environment-to-property-merger-2.0.0.jar ./example/example1.properties PREFIX_
  

  OUTPUT:
  
  # INFO: Using environment variable prefix: prefix_
  # MERGED_WITH: https://github.com/trajakovic/environment-to-property-merger
  #Tue Jan 02 17:39:28 CET 2018
  this.is.property.from.environment=Prefixed with PREFIX_, but case is ignored
  second.property.in.example1=this is second line
  first.property.from.example1.file=just for demonstration
  

• $ PREFIX_SECOND_PROPERTY_IN_EXAMPLE1="Property from environment variable is overriding existing one" \
     java -jar ./build/libs/environment-to-property-merger-2.0.0.jar ./example/example1.properties PREFIX_
  

  OUTPUT:
  
  # INFO: Using environment variable prefix: prefix_
  # MERGED_WITH: https://github.com/trajakovic/environment-to-property-merger
  #Tue Jan 02 17:46:29 CET 2018
  second.property.in.example1=Property from environment variable is overriding existing one
  first.property.from.example1.file=just for demonstration
  

• $ PREFIX_MISSING_FILE_IS_OK=ok PREFIX_SECOND_PROPERTY=second \
      java -jar ./build/libs/environment-to-property-merger-2.0.0.jar /missing/property/file PREFIX_
  

  OUTPUT:
  
  # INFO: Missing input file /missing/property/file
  # INFO: Using environment variable prefix: prefix_
  # MERGED_WITH: https://github.com/trajakovic/environment-to-property-merger
  #Tue Jan 02 17:50:07 CET 2018
  missing.file.is.ok=ok
  second.property=second
  

• $ USE_MINUS_TO_DENOTE_EMPTY_PREFIX=- \
      java -jar ./build/libs/environment-to-property-merger-2.0.0.jar /missing/property/file -
  

  OUTPUT:
  
   ye, here you'll get all environment variables as property files :)