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Compare artifact digests as well as revisions when mapping source updates to Kustomizations. Add regression tests for applying changed content while the source Git revision remains unchanged. Assisted-by: Hermes Agent (gpt-6-astra / openai-codex) Signed-off-by: Michael Basov <124149774+banlor@users.noreply.github.com>
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Related to fluxcd/source-controller#522.
An included GitRepository can produce different artifact contents while keeping the same Git revision. The source update predicate notices this, but requestsForRevisionChange drops it because lastAttemptedRevision already matches.
Keep the mapper's shortcut only when both revision and digest are unchanged. The envtest regression applies changed ConfigMap content without advancing the Git revision, and covers unchanged-digest and timestamp-only updates.
The full make test passed on Go 1.26.8 and Kubernetes 1.37.0 (330 tests and subtests). The separate API-module check also passed; those packages have no tests.
An extra full race run is not green. The kyaml ResetOpenAPI/getSchema race also reproduces on the unchanged base. Another report involves the prune test swapping the shared reconciler client; that test and getSource are unchanged, but a separate baseline retry did not reproduce that report.
Assisted by Hermes Agent with gpt-6-astra.