Add SpringBootTransformer for merging Spring Boot configuration files#2093
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Goooler wants to merge 1 commit into
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Add SpringBootTransformer for merging Spring Boot configuration files#2093Goooler wants to merge 1 commit into
SpringBootTransformer for merging Spring Boot configuration files#2093Goooler wants to merge 1 commit into
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Goooler
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Jul 8, 2026
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- CHANGELOG's "Unreleased" section has been updated, if applicable.
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Pull request overview
Adds a dedicated SpringBootTransformer to merge Spring Boot/Spring configuration resources when producing a shadow JAR, including .imports support and relocation behavior, and documents the new transformer for end users.
Changes:
- Introduces
SpringBootTransformerthat merges Spring properties-style files and line-basedMETA-INF/spring/*.importsfiles, applying relocation. - Adds unit + functional test coverage for key merge/relocation behaviors and updates duplicate-strategy checker expectations.
- Updates user documentation and Kotlin ABI dump to reflect the new public transformer API.
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| src/main/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/SpringBootTransformer.kt | New transformer implementing Spring Boot/Spring resource merging + relocation. |
| src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/SpringBootTransformerTest.kt | Unit tests for resource matching, merging, and relocation. |
| src/functionalTest/kotlin/com/github/jengelman/gradle/plugins/shadow/transformers/SpringBootTransformerTest.kt | Functional tests validating behavior in an end-to-end ShadowJar build. |
| src/test/kotlin/com/github/jengelman/gradle/plugins/shadow/internal/DuplicatesStrategyCheckerTest.kt | Updates expected transformer counts due to the new transformer. |
| docs/configuration/merging/README.md | Documents how to enable and what is handled by SpringBootTransformer. |
| api/shadow.api | ABI dump updated to include the new public transformer class. |
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