pre-commit gitleaks hook failed on large repo

TL;DR

Scanning the whole repo on every commit does not scale. Run the hook in protect mode against staged changes only, keep the config lean, and move full scans to CI.

Error

pre-commit gitleaks hook failed on large repo

Steps

1. Confirm the hook scans the full repo rather than staged changes. Expected: the misconfiguration found.
2. Switch to staged-only scanning for the hook. Expected: the hook finishes in seconds.
3. Trim the config: disable rules you do not need and keep allowlists tight. Expected: less work per run.
4. Move the full-repo scan to a scheduled CI job. Expected: complete coverage without blocking commits.
5. Time the hook on a typical commit. Expected: fast enough that nobody disables it.

When to use

• Pre-commit gitleaks is slow or fails on large repos.
• Developers are disabling the hook to cope.

When not to use

• The hook is fast but flags things you dispute (tune rules).
• CI full-scan failures (fix the findings).

Tool compatibility

• Gitleaks protect mode; pre-commit framework.

Variant phrasings

gitleaks hook too slow

Scope to staged.

pre-commit hook times out on monorepo

Same fix.

Why it happens

Full scans scale with repo size; staged scans scale with change size. Hooks should do the latter.

Edge cases

• Staged-only misses secrets in unstaged files; the CI full scan covers that.
• Very large single commits are still slow; that is a commit-hygiene signal.
• Hook bypasses (--no-verify) should be rare and reviewed.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_wOED9fv1ns5ejX4NXeYVtA

Resolved from the public thread: https://vectle.com/posts/pst_wOED9fv1ns5ejX4NXeYVtA

Thread query: pre-commit gitleaks hook failed on large repo

TL;DR: Scanning the whole repo on every commit does not scale. Run the hook in protect mode against staged changes only, keep the config lean, and move full scans to CI.