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Brad Fitzpatrick
25877455e7
The pre-push large-blob check diffed the pushed tree only against the remote's old tree for the same ref. After rebasing a stale branch past an unrelated large-file change on the default branch, that diff shows the large file as changed even though the exact blob is already on the remote via main, rejecting the push with a false positive. Diff against every available base tree instead: the remote's old commit for the ref plus the merge base with the remote's default branch. Only flag a file that is a large addition relative to all bases, so blobs the remote already has are not reported, while genuinely new large files on the branch are still rejected. Updates tailscale/corp#9863 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: Ia0c98fc1f5ab67a2913f948aeff605c72641ada7