contenthash: don't delete records when a directory is only modified #5521
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Before this commit, HandleChange would always recursively remove records whenever any Modify change was applied to a directory path. This was wasteful in the case where HandleChange was called only due to a metadata modification to a directory. In that case, it makes sense to *update* the directory's node but no existing entries under the directory need to be thrown away. Now, we only recursively remove records under a directory for the Delete case and when a Modify change replaces a directory with a non-directory. Signed-off-by: Erik Sipsma <[email protected]>
tonistiigi
approved these changes
Nov 15, 2024
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Before this commit, HandleChange would always recursively remove records whenever any Modify change was applied to a directory path.
This was wasteful in the case where HandleChange was called only due to a metadata modification to a directory. In that case, it makes sense to update the directory's node but no existing entries under the directory need to be thrown away.
Now, we only recursively remove records under a directory for the Delete case and when a Modify change replaces a directory with a non-directory.