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Document the cache-overwrite-existing parameter
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README.md
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README.md
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@ -145,6 +145,20 @@ In certain circumstances it may be desirable to start with a clean Gradle User H
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cache-write-only: true
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```
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### Overwriting an existing Gradle User Home
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When the action detects that the Gradle User Home caches directory already exists (`~/.gradle/caches`), then by default it will not overwrite the existing content of this directory.
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This can occur when a prior action initializes this directory, or when using a self-hosted runner that retains this directory between uses.
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In this case the Job Summary will display a message like:
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> Caching for gradle-build-action was disabled due to pre-existing Gradle User Home
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If you want override the default and have the `gradle-build-action` caches overwrite existing content in the Gradle User Home, you can set the `cache-overwrite-existing` parameter to 'true':
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```yaml
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cache-overwrite-existing: true
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```
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### Incompatibility with other caching mechanisms
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When using `gradle-build-action` we recommend that you avoid using other mechanisms to save and restore the Gradle User Home.
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