Mercurial Extension Utils
This module contains group of reusable functions, which I found useful while writing various Mercurial extensions.
In most cases it should be installed automatically while you install one of those extensions. See below for installation instructions in more tricky cases (in particular, for information about installation on Windows).
This document uses Dynamic Username in examples, but the same method should work for any other extension which requires mercurial_extension_utils.
In typical case mercurial_extension_utils should be installed automatically, without requiring your attention, by commands like pip install mercurial_dynamic_username.
If for some reason it did not work, just install from PyPi with:
pip install --user mercurial_extension_utils
or system-wide with:
sudo pip install mercurial_extension_utils
If you don’t have pip, try:
sudo easy_install mercurial_extension_utils
Upgrade to newer version using the same commands with --upgrade option added, for example:
pip install --user --upgrade mercurial_extension_utils
If you miss both pip, and easy_install, follow recipe from Installing for development section.
Windows Mercurial distributions (including most popular - and well deserving that - TortoiseHg) are not using system Python (in fact, one may use Mercurial without installing Python at all), and installing into bundled Python path is uneasy. To remedy that, extensions utilizing this module handle additional methods of locating it.
The following two methods of installation are available:
If you have some Python installed, you may still install both this module, and extension using it, from PyPi. For example:
pip install mercurial_extension_utils pip install mercurial_dynamic_username
This will not (yet) make the module visible to your Mercurial, but you will get all the necessary files installed on your computer.
Then activate the actual extension in charge by specifying it’s path, for example by writing in your Mercurial.ini:
[extensions] mercurial_dynamic_username = C:/Python27/Lib/site-packages/mercurial_dynamic_username.py
This works because mercurial_dynamic_username.py checks for mercurial_extension_utils.py saved in the same directory (and pip installs both modules in the same place). You can get the same effect by manually downloading all files into the same directory (using pip is more handy as it tracks dependencies and supports upgrades).
Upgrade with pip by adding --upgrade to it’s options.
If you don’t have any Python, clone both the extension(s) repository and mercurial_extension_utils` and put them in the same place, for example:
cd c:\MercurialPlugins hg clone https://foss.heptapod.net/mercurial/mercurial-extension_utils/ hg clone https://foss.heptapod.net/mercurial/mercurial-dynamic_username/
Update repositories to newest tagged versions (untagged versions may be unstable or not working).
Activate the actual extension by specifying it’s path, for example by writing in Mercurial.ini:
[extensions] mercurial_dynamic_username = C:/MercurialPlugins/mercurial-dynamic_username/mercurial_dynamic_username.py
Directory names matter. This works because mercurial_dynamic_username.py checks for mercurial_extension_utils.py in ../mercurial_extension_utils and ../extension_utils (relative to it’s own location).
To upgrade to new version, simply pull and update to newer tag.
On Windows use second variant from the previous chapter (clone and activate by path).
On Linux/Unix do the same. Clone all the necessary repositories, for example:
cd ~/sources/ hg clone https://foss.heptapod.net/mercurial/mercurial-extension_utils/ hg clone https://foss.heptapod.net/mercurial/mercurial-dynamic_username/
then either make it visible to Python by repeating in every repo:
pip install --user -e .
or activate the extension(s) by full path, by writing in ~/.hgrc something like:
[extensions] mercurial_dynamic_username = ~/sources/mercurial-dynamic_username/mercurial_dynamic_username.py
Provided functions are mostly tiny utilities related to configuration processing or location matching. They either extend Mercurial APIs a bit (like function to iterate config items which match regexp), or support tasks which aren’t strictly Mercurial related, but happen repeatably during extension writing (like matching repository root against set of paths defined in the configuration).
Noticeable part of the library handles various incompatibilities between Mercurial versions.
See docstrings for details.
Unit-tests can be run by:
python -m unittest discover tests/
(against current version) or:
(against various versions of mercurial and python).
Development is tracked on HeptaPod, see https://foss.heptapod.net/mercurial/mercurial-extension_utils/
Use issue tracker there for bug reports and enhancement suggestions.
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