pre-lock
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## Name

pre-lock — Notification of a path lock attempt.

## Description

The `pre-lock` hook runs whenever someone attempts to lock a path. It can be used to prevent locks altogether or to create a more complex policy specifying exactly which users are allowed to lock particular paths. If the hook notices a preexisting lock, it can also decide whether a user is allowed to “steal” the existing lock.

If the `pre-lock` hook program returns a nonzero exit value, the lock action is aborted and anything printed to `stderr` is marshalled back to the client.

## Input parameter(s)

The command-line arguments passed to the hook program, in order, are:

1. Repository path

2. Versioned path that is to be locked

3. Authenticated username of the person attempting the lock

## Common uses

Access control

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