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8c98d2a417
Add a large blob check to the pre-push hook, using the same git tree diff logic as corp's check-file-size CI workflow (the check-git-accidental-large-file GitHub Action): diff the pushed tree against the remote's old tree (or the merge base with the remote's default branch for new refs) and reject any new or changed blob over 1.5 MB. Unlike the CI check, which only guards PRs into main, the hook runs before pushing to any branch, catching mistakes before they permanently bloat the remote repo. Set TS_SKIP_LARGE_FILE_CHECK=1 to push a large file intentionally, mirroring the skip-large-file-check commit message tag honored by CI. This folds the go.mod replace check and the new check into a single CheckPrePush entry point so both share one read of the hook's stdin; corp's git-hook.go needs the matching call site update when it next bumps its tailscale.com dependency. Updates tailscale/corp#9863 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: I1c8cf2a277ce854d45c0ea809bed7c06b3295374