webnet/tailscale
1
0
Fork 0
Code Issues 1 Pull Requests Packages Projects Releases Wiki Activity

misc/git_hook: reject pushes that add large files

Browse Source 
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
This commit is contained in:
Brad Fitzpatrick
2026-07-24 08:22:19 -07:00
committed by Brad Fitzpatrick
parent b062abb1ea
commit 8c98d2a417
5 changed files with 238 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
misc/git_hook/README.md
+9
View File
@@ -14,6 +14,15 @@ From the repo root:
The script auto-updates in the future.
## Large file check
The pre-push hook rejects pushes that add or change any blob over 1.5
MB, using the same tree diff logic as the check-file-size CI workflow.
To push a large file intentionally, set an environment variable:
TS_SKIP_LARGE_FILE_CHECK=1 git push ...
## Adding your own hooks
Create an executable `.git/hooks/<hook-name>.local` to chain a custom