4caa60c032
Refactor change detection for rustdoc and download-rustc This pull request refactors the change detection logic in the build process by consolidating redundant code into a new helper method. The key changes include the removal of duplicate logic for checking changes in directories and the addition of a new method to handle this functionality. Refactoring and code simplification: * [`src/bootstrap/src/core/build_steps/tool.rs`](diffhunk://#diff-dc86e288bcf7b3ca3f8c127d3568fbafc785704883bc7fc336bd185910aed5daL588-R593): Removed redundant change detection logic and replaced it with a call to the new `check_for_changes` method. * [`src/bootstrap/src/core/config/config.rs`](diffhunk://#diff-5f5330cfcdb0a89b85ac3547b761c3a45c2534a85c4aaae8fea88c711a7a65b2R2837-R2872): Added a new method `check_for_changes` to centralize the logic for detecting changes in specified directories since a given commit. * [`src/bootstrap/src/core/config/config.rs`](diffhunk://#diff-5f5330cfcdb0a89b85ac3547b761c3a45c2534a85c4aaae8fea88c711a7a65b2L2728-R2740): Updated the existing change detection code to use the new `check_for_changes` method. Cleanup: * [`src/bootstrap/src/core/build_steps/tool.rs`](diffhunk://#diff-dc86e288bcf7b3ca3f8c127d3568fbafc785704883bc7fc336bd185910aed5daL13-R13): Removed the unused import `git` from the helpers module. r? ``@AlbertLarsan68``
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