[CI] Stabilise computing the list of changed files for ruff.#21068
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hageboeck merged 1 commit intoroot-project:masterfrom Jan 29, 2026
Merged
[CI] Stabilise computing the list of changed files for ruff.#21068hageboeck merged 1 commit intoroot-project:masterfrom
hageboeck merged 1 commit intoroot-project:masterfrom
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When a user branched from master a while ago, the diff step in the ruff action can compute the list of changed files wrongly. Here, we use the fact that the checkout action uses a merge commit on top of the target branch, so computing the diff between the last two commits encompasses all the files touched in the PR.
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When a user branched from master a while ago, the diff step in the ruff action will compute the list of changed files wrongly. Here, we use the fact that the checkout action uses a merge commit on top of the target branch, so computing the diff between the last two commits encompasses all the files touched in the PR.
An example of the failure case can be seen in this PR: #20992
It doesn't touch any Python files, but the ruff check failed.