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A tool to measure the entropy of your commit history

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Commit Entropy
=======
Commit Entropy is a tool that can be used to calculate the entropy of changes in a source code repository.  Entropy for code changes is a measure of how specific each commit was in relation to the entire code base. Very specific commits only affect a small set of files, and thus have a low entropy. Commits that touch a large number of files are much less specific and have a higher entropy as a result.

The term Entropy in this context is a simplified application of [Shannon Entropy](https://en.wikipedia.org/wiki/Entropy_%28information_theory%29) to commits in a source repository. It's simplified since we only look at the number of files changed each commit, with each file having an equal probability.

Read more about entropy on our [blog](http://grip.qa/blog/entropy-measuring-software-maturity/).

Installation
------------
Commit Entropy currently supports [Python 3.x](https://www.python.org/downloads/). It can be installed using [pip](https://pip.pypa.io/en/latest/).

pip install commit-entropy

This will install the `commit-entropy` executable on your path.

If you don't have pip, you can install it manually by cloning the code and running the install script:

git clone git@github.com:GripQA/commit-entropy.git
    cd commit-entropy
    python setup.py install

Usage
-----
Currently we support a single operation: exporting a csv file with the average entropy per day and a 30-day rolling average. From within a git repo:

commit-entropy csv

This will output a `entropy.csv` file in the current directory with the average entropy values.

You can ignore a list of paths by using the `--ignore` option:

commit-entropy csv --ignore=vendor/*,*.log

Support
-------
If you have any questions, problems, or suggestions, please submit an [issue](../../issues) or contact us at support@grip.qa.

commit-entropy

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