install4j-incremental-build-reproducer

Uses the Install4J Gradle plugin to create an installer, demonstrating the plugin does not support Gradle's incremental building or configuration cache.

To test support for incremental building:

1. Execute the Gradle task to build the installer:
   .\gradlew.bat install4j (Windows)
   ./gradlew install4j (Unix/macOS)
2. Note that two tasks are executed (unzipData and install4j):

BUILD SUCCESSFUL in 36s
2 actionable tasks: 2 executed
Configuration cache entry discarded with 21 problems.

3. Without modifying any files, execute the Gradle task to build the installer (see above)
4. Note that one task is executed (install4j) and one task is up-to-date (unzipData):

BUILD SUCCESSFUL in 8s
2 actionable tasks: 1 executed, 1 up-to-date
Configuration cache entry discarded with 21 problems.

To test support for configuration caching:

1. Execute the Gradle task to build the installer:
   .\gradlew.bat install4j (Windows)
   ./gradlew install4j (Unix/macOS)
2. Note the Gradle outputs relating to configuration cache as follows:

Configuration on demand is an incubating feature.
Calculating task graph as no cached configuration is available for tasks: install4j

[Install4J output...]

21 problems were found storing the configuration cache, 1 of which seems unique.
- Task `:installer-module:install4j` of type `com.install4j.gradle.Install4jTask`: invocation of 'Task.project' at execution time is unsupported.
  See https://docs.gradle.org/8.5/userguide/configuration_cache.html#config_cache:requirements:use_project_during_execution

See the complete report at file:///C:/Dev/Projects/SCM/Demos/install4j-incremental-build-reproducer/build/reports/configuration-cache/ds1t8nxbwl2k8qey7c8k3hb81/2qcvkplkib9algn86qwdyjz3i/configuration-cache-report.html

3. Note also the install4j task in the ./installer-mode/build.gradle.kts build script uses notCompatibleWithConfigurationCache.

notCompatibleWithConfigurationCache(
    "'Install4jTask' invokes 'Task.project' at execution time."
)

Removing the call to notCompatibleWithConfigurationCache will cause the task to fail:

> Task :installer-module:install4j FAILED

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':installer-module:install4j'.
> Extension with name 'install4j' does not exist. Currently registered extension names: [ext]

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
Configuration cache problems found in this build.

1 problem was found storing the configuration cache.
- Task `:installer-module:install4j` of type `com.install4j.gradle.Install4jTask`: invocation of 'Task.project' at execution time is unsupported.
  See https://docs.gradle.org/8.5/userguide/configuration_cache.html#config_cache:requirements:use_project_during_execution

See the complete report at file:///C:/Dev/Projects/SCM/Demos/install4j-incremental-build-reproducer/build/reports/configuration-cache/ds1t8nxbwl2k8qey7c8k3hb81/ex4sfymyivsu6j8jcbo26ysa5/configuration-cache-report.html
> Invocation of 'Task.project' by task ':installer-module:install4j' at execution time is unsupported.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

BUILD FAILED in 28s
2 actionable tasks: 1 executed, 1 up-to-date
Configuration cache entry discarded with 1 problem.