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https://issues.apache.org/jira/browse/SOLR-15603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17405714#comment-17405714
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Dawid Weiss commented on SOLR-15603:
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I am really curious which tasks you have in mind and looking forward to seeing
the patch. I think most of the tasks currently use inputs/outputs properly so
their up-to-date checks work fine. Task output caching is something I've always
been reluctant about because it allows a small possibility of the build outputs
being not identical between runs (depending on whether you fetch things from
cache or not). But I'd love to be proven wrong.
A much more ambitious niche is in how to implement git-versioned task outputs.
We do have generated code that can take a *long* time to generate (and requires
vast amounts of resources). The outputs of these tasks are currently stored in
git and versioned; they're also subject to checksum-checks against their source
inputs so that if the input is out of sync with the output, the build fails and
requires regeneration. Implementing this has proven to be *very* complex in
gradle. I wonder if there is an easier solution to this (the build cache is not
an option here - the outputs have to be versioned in git). This part implements
the logic I mentioned above:
https://github.com/apache/lucene/tree/main/gradle/generation
https://github.com/apache/lucene/blob/main/gradle/generation/regenerate.gradle#L81-L104
> Activate Gradle build cache
> ---------------------------
>
> Key: SOLR-15603
> URL: https://issues.apache.org/jira/browse/SOLR-15603
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Alexis Tual
> Assignee: Dawid Weiss
> Priority: Minor
>
> Activate Gradle build cache to avoid re-executing cacheable tasks.
> Make as well some custom tasks cacheable, this effort can be quite large
> depending on build complexity, so this Jira issue will cover only the
> straightforward fixes.
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