arve0/gradle-configuration-cache

minimal, reproducible example configuration cache caches all environment variables

Gradle configuration cache caches all environment variables, not just the ones that are used in the build. The behavior is unexpected.

This example uses two environment variables:

• ENVIRONMENT which is set to 'local' when running with gradle
• SOME_ENV which is used by gradle

Reproducing the issue

export SOME_ENV=foo
./gradlew run
# Calculating task graph as no cached configuration is available for tasks: run
#   I'm running in local environment
#   SOME_ENV is 'foo'

export SOME_ENV=bar
./gradlew run
# Reusing configuration cache.
#   I'm running in local environment
#   SOME_ENV is 'foo'                  <--- expected 'bar'

# changing ENVIRONMENT bustes the configuration cache
# could also use --no-configuration-cache to get updated SOME_ENV
export ENVIRONMENT=prod
./gradlew run
# Calculating task graph as configuration cache cannot be reused because environment variable 'ENVIRONMENT' has changed.
#   I'm running in prod environment
#   SOME_ENV is 'bar'                  <--- ok after cache bust