Migrate Scala test setup to a convention plugin

[bric3]

What Does This Do

Replaces the shared Scala test script with the dd-trace-java.conventions.testing.scala convention and migrates its consumers.

Motivation

The name describes Scala test support. Groovy interoperability is configured only when the Groovy plugin is present.

Additional Notes

This convention lands in the preferred build-logic/ location because projects apply it directly, on demand. It could move to buildSrc/, but that is not the desired goal. Conventions should move there only when their types or plugins must be visible to other buildSrc/ plugins or legacy script plugins through Gradle’s shared build-script classloader.

[dd-octo-sts]

🟢 Java Benchmark SLOs — All performance SLOs passed

Suite	Status
Startup	🟢 pass

SLO thresholds are defined here based on automatically generated metrics. A warning is raised when results are within 5% of the threshold.

PR vs. master results

Scenario	Candidate	master	Δ (95% CI of mean)
startup:insecure-bank:iast:Agent	14.03 s	13.99 s	[-0.6%; +1.2%] (no difference)
startup:insecure-bank:tracing:Agent	12.97 s	13.07 s	[-1.7%; +0.2%] (no difference)
startup:petclinic:appsec:Agent	16.91 s	16.72 s	[+0.0%; +2.3%] (maybe worse)
startup:petclinic:iast:Agent	16.91 s	17.00 s	[-1.4%; +0.4%] (no difference)
startup:petclinic:profiling:Agent	16.65 s	16.24 s	[-2.0%; +7.1%] (no difference)
startup:petclinic:sca:Agent	16.81 s	16.40 s	[+1.5%; +3.5%] (significantly worse)
startup:petclinic:tracing:Agent	15.57 s	16.13 s	[-7.5%; +0.6%] (no difference)

Commit: 520bc915 · CI Pipeline · Benchmarking Platform UI

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Load and DaCapo benchmarks can be triggered manually in the GitLab pipeline. Results will appear in the Benchmarking Platform UI after completion.

[datadog-datadog-us1-prod]

More details

The new convention keeps the prior Scala dependencies and Groovy compile setup. All former script users now use the convention.

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[datadog-datadog-us1-prod]

More details

The new convention plugins preserve the removed scripts' dependencies, task setup, and logging setup. Each former user now applies the matching plugin.

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[bric3]

/merge

[gh-worker-devflow-routing-ef8351]

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2026-08-25 15:00:20 UTC ℹ️ Start processing command /merge

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2026-08-25 15:00:26 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in master is approximately 2h (p90).

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2026-08-25 16:02:52 UTC ℹ️ MergeQueue: This merge request was merged