view hgext/__init__.py @ 24010:a63c2b159df4

copy: move mergecopies file logic to a function

Moves the mergecopies nonoverlap logic to a separate function so that other
extensions which may need to prefetch information about the files being
processed have a hook point.

This saves extensions from having to recompute this information themselves, and
thus saves several seconds off of various commands (like rebase).

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