In failed build limit reactor summary to only failed modules

[slawekjaranowski]

When build fail in multimodule project we need scroll many lines to see whats is wrong

based on: #11977

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[gnodet]

Review Summary

This PR implements a useful UX improvement: in failed multi-module builds, the reactor summary is condensed to show only the failed modules with ... ellipsis markers replacing successful/skipped modules. The formatBuildTime extraction is a nice refactoring that eliminates code duplication, and the changes are correctly applied to both the compat and impl copies.

However, the ellipsis logic has a gap in the multi-failure scenario.

Issue: missing ellipsis between non-adjacent failures

In a --fail-at-end build with modules M1(root,success), M2(fail), M3(success), M4(success), M5(fail), M6(skipped), M7(skipped):

The ... separator is only printed when project.isExecutionRoot() is true inside the shouldSkip block. Since only M1 is the execution root, the output would be:

...
M2 .................. FAILURE [1.234 s]
M5 .................. FAILURE [0.567 s]
...

Modules M3 and M4 (which succeeded between the two failures) are silently dropped with no visual separator. A more informative output would be:

...
M2 .................. FAILURE [1.234 s]
...
M5 .................. FAILURE [0.567 s]
...

Suggested fix: Replace the isExecutionRoot() guard with a "was previous module skipped?" tracking variable:

boolean lastWasSkipped = false;
for (MavenProject project : projects) {
    // ... determine shouldSkip ...
    if (shouldSkip) {
        lastWasSkipped = true;
        continue;
    }
    if (lastWasSkipped) {
        logger.info("...");
        lastWasSkipped = false;
    }
    // ... print module line ...
}
if (lastWasSkipped) {
    logger.info("...");
}

This applies to both the impl and compat copies.

Minor notes

• No test covers the multi-failure (--fail-at-end) scenario — adding one would validate the ellipsis placement between non-adjacent failures
• New test methods use public while existing tests use package-private (JUnit 5 convention in this codebase)

Overall the feature is valuable — the ellipsis logic just needs refinement for multi-failure correctness.

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This review was generated by an AI agent and may contain inaccuracies. Please verify all suggestions before applying.

Claude Code on behalf of Guillaume Nodet

[Bukama]

Can we make this visual change configuarable?