* LUCENE-9382: update gradle to 6.4.1. Requires minor changes around log call validation by restructuring the code around switches to a series of ifs. Piggybacking: apply log validation to :solr modules. Add inputs declaration so that task is not re-run on unmodified files.
Previous situation:
* The snowball base classes (Among, SnowballProgram, etc) had accumulated local performance-related changes. There was a task that would also "patch" generated classes (e.g. GermanStemmer) after-the-fact.
* Snowball classes had many "non-changes" from the original such as removal of tabs addition of javadocs, license headers, etc.
* Snowball test data (inputs and expected stems) was incorporated into lucene testing, but this was maintained manually. Also files had become large, making the test too slow (Nightly).
* Snowball stopwords lists from their website were manually maintained. In some cases encoding fixes were manually applied.
* Some generated stemmers (such as Estonian and Armenian) exist in lucene, but have no corresponding `.sbl` file in snowball sources at all.
Besides this mess, snowball project is "moving along" and acquiring new languages, adding non-BSD-licensed test data, huge test data, and other complexity. So it is time to automate the integration better.
New situation:
* Lucene has a `gradle snowball` regeneration task. It works on Linux or Mac only. It checks out their repos, applies the `snowball.patch` in our repository, compiles snowball stemmers, regenerates all java code, applies any adjustments so that our build is happy.
* Tests data is automatically regenerated from the commit hash of the snowball test data repository. Not all languages are tested from their data: only where the license is simple BSD. Test data is also (deterministically) sampled, so that we don't have huge files. We just want to make sure our integration works.
* Randomized tests are still set to test every language with generated fake words. The regeneration task ensures all languages get tested (it writes a simple text file list of them).
* Stopword files are automatically regenerated from the commit hash of the snowball website repository.
* The regeneration procedure is idempotent. This way when stuff does change, you know exactly what happened. For example if test data changes to a different license, you may see a git deletion. Or if a new language/stopwords/test data gets added, you will see git additions.
- added 'owasp' task to the root project. This depends on
dependencyCheckAggregate which seems to be a better fit for multi-module
projects than dependencyCheckAnalyze (the difference is vague to me
from plugin's documentation).
- you can run the "gradlew owasp" task explicitly and it'll run the
validation without any flags.
- the owasp task is only added to check if validation.owasp property
is true. I think this should stay as the default on non-CI systems
(developer defaults) because it's a significant chunk of time it takes
to download and validate dependencies.
- I'm not sure *all* configurations should be included in the check...
perhaps we should only limit ourselves to actual runtime dependencies
not build dependencies, solr-ref-guide, etc.
