Is it possible for my Mercurial hook to call code from another file?

Question

I have a hook function named precommit_bad_branch which imports hook_utils. When invoking precommit_bad_branch via a commit I get the following error message:

error: precommit.branch_check hook raised an exception: No module named hook_utils
abort: No module named hook_utils!

It looks like I'm not allowed to call hook_utils from precommit_bad_branch. The code works fine if I call it explicitly without involving Mercurial.

Is it possible for my hook to call code from another file?

My hgrc hook part looks like this:

[hooks]
precommit.branch_check = python:C:\workspaces\hg_hooks\next_hooks.py:precommit_bad_branch
precommit.debug_code_check = python:C:\workspaces\hg_hooks\common_hooks.py:precommit_contains_debug_code
preupdate.merge_check = python:C:\workspaces\hg_hooks\next_hooks.py:preupdate_bad_merge

Answer 1

Put the C:\workspaces\hg_hooks directory in your PYTHONPATH and you will be able to write

[hooks]
precommit.branch_check = python:next_hooks.precommit_bad_branch

in your configuration file and you will also be able to do

import hook_utils

inside any Python file, including the next_hooks.py file.

Alternatively, you can modify sys.path from next_hooks.py, perhaps with code like this:

import sys
import os
sys.path.append(os.path.dirname(os.path.abspath(__file__)))

import hook_utils