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https://issues.apache.org/jira/browse/LUCENE-9077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988985#comment-16988985
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Kevin Risden commented on LUCENE-9077:
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[~dweiss] I think I beat you to it in SOLR-14001. forgot to update this jira.
> Gradle build
> ------------
>
> Key: LUCENE-9077
> URL: https://issues.apache.org/jira/browse/LUCENE-9077
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Dawid Weiss
> Assignee: Dawid Weiss
> Priority: Major
> Fix For: master (9.0)
>
>
> This task focuses on providing gradle-based build equivalent for Lucene and
> Solr (on master branch). See notes below on why this respin is needed.
> The code lives on *gradle-master* branch. It is kept with sync with *master*.
> Try running the following to see an overview of helper guides concerning
> typical workflow, testing and ant-migration helpers:
> gradlew :help
> A list of items that needs to be added or requires work. If you'd like to
> work on any of these, please add your name to the list. Once you have a
> patch/ pull request let me (dweiss) know - I'll try to coordinate the merges.
> * (/) Apply forbiddenAPIs
> * (/) Generate hardware-aware gradle defaults for parallelism (count of
> workers and test JVMs).
> * (/) Fail the build if --tests filter is applied and no tests execute
> during the entire build (this allows for an empty set of filtered tests at
> single project level).
> * [dw] Port other settings and randomizations from common-build.xml
> * [dw] Configure security policy/ sandboxing for tests.
> * Add test 'beasting' (rerunning the same suite multiple times). I'm afraid
> it'll be difficult to run it sensibly because gradle doesn't offer cwd
> separation for the forked test runners.
> * jar checksums, jar checksum computation and validation. This should be
> done without intermediate folders (directly on dependency sets).
> * add a :helpDeps explanation to how the dependency system works (palantir
> plugin, lockfile) and how to retrieve structured information about current
> dependencies of a given module (in a tree-like output).
> * if you diff solr packaged distribution against ant-created distribution
> there are minor differences in library versions and some JARs are excluded/
> moved around. I didn't try to force these as everything seems to work (tests,
> etc.) – perhaps these differences should be fixed in the ant build instead.
> * identify and list precommit tasks so that they can be ported one by one.
> (Mark's branch has some of this stuff already implemented)
> * identify and port any other "check" utilities that may be called from ant.
> (Mark's branch has some of this stuff already implemented)
> * [EOE] identify and port various "regenerate" tasks from ant builds
> (javacc, precompiled automata, etc.)
> * add rendering of javadocs (gradlew javadoc) and attaching them to maven
> publications.
> * fill in POM details in gradle/defaults-maven.gradle so that they reflect
> the previous content better (dependencies aside).
> * Add any IDE integration layers that should be added (I use IntelliJ and it
> imports the project out of the box, without the need for any special tuning).
> * *Clean up dependencies, especially for Solr*: any \{ transitive = false }
> should just explicitly exclude whatever they don't need (and their
> dependencies currently declared explicitly should be folded). Figure out
> which scope to import a dependency to.
> * Add Solr packaging for docs/* (see TODO in packaging/build.gradle;
> currently XSLT...)
> * I didn't bother adding Solr dist/test-framework to packaging (who'd use it
> from a binary distribution?
> * Insure the dependencies are all up to date between ant and gradle. This
> will be a really tedious comparison of ivy-versions.properties and
> versions.props.
>
> *{color:#ff0000}Note:{color}* this builds on the work done by Mark Miller and
> Cao Mạnh Đạt but also applies lessons learned from those two efforts:
> * *Do not try to do too many things at once*. If we deviate too far from
> master, the branch will be hard to merge.
> * *Do everything in baby-steps* and add small, independent build fragments
> replacing the old ant infrastructure.
> * *Try to engage people to run, test and contribute early*. It can't be a
> one-man effort. The more people understand and can contribute to the build,
> the more healthy it will be.
>
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