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A python package for making stacked area plots of contributions over time.

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A python package for making stacked area plots of contributions to a git repository over time. Plots can show contributions by authors, or by organizations.


contrib is on PyPI, so you can just pip install it:

$ pip install contrib

Alternately, you can clone this project, add its directory to your PYTHONPATH, and add the bin directory to your PATH.


To use contrib, you'll need to create a configuration file telling it where to find your code. Below is an example for Spack; you can find complete code in the spack-contributions repo.

Here's an example contrib.yaml:

  # Path to your git repository. to run git blame on.
  # Consider making this a git submodule.
  repo:   ./spack

  # JSON file mapping authors to organizations (optional)
  orgmap: ./author-to-org.json

  # Separate parts of the repository to process (optional).  For each
  # commit, contrib will look for files that match the patterns in each
  # part.  For a simple repo, you may only need one regular expression
  # per part.  In Spack, the packages have moved around in the repo over
  # time, so we provide multiple patterns.  Contrib will use the first
  # pattern matched by any file in each commit.
      - ^var/spack/repos/builtin/packages/.*\.py$
      - ^var/spack/packages/.*\.py$
      - ^lib/spack/spack/packages/.*\.py$

The repo needs to be in your local filesystem, preferably in the same directory as contrib.yaml. orgmap is optional (see below for how to generate it). parts is also optional; if you do not specify it, there will be one part called all that matches everything:

        - ^.*$

You can name your parts anything; see the example above for how to model a repository where different logical parts have moved around in subdirectories.

Mapping authors to organizations

The orgmap (author-to-org.json in the example above) is optional. If you choose to provide it, it should be simple json dictionary mapping authors to organizations:

  "Author 1": "UIUC",
  "Author 2": "LBL",
  "Author N": "LLNL"

You can run contrib --update-org-map to generate an orgmap to start with. contrib will look at your repository's history and generate the file automatically:

$ contrib --update-org-map
==> Added 503 new authors to 'author-to-org.json'
==> New orgmap file created in 'author-to-org.json'.
==> Add it to './contrib.yaml' like this:

        orgmap: author-to-org.json

If you then add this file to your contrib.yaml, you can update it later as your repository evolves:

$ contrib --update-org-map
==> Added 10 new authors to 'author-to-org.json'

Newly added authors will be labeled as unknown <email from git> in the json file:

  "Author 1": "unknown <>",
  "Author 2": "unknown <>",
  "Author 3": "unknown <>",

You can replace these with valid organizations, or just leave them and they'll show up as "unknown" in the contrib plots.


Once you've got all of that set up, you can run contrib in the directory where contrib.yaml lives:

$ ls
author-to-org.json  contrib.yaml
$ contrib
==> Indexing 49 commits.

STARTED       0/49 53ab298e88f80454f7f7c20ef200a3dbd0870473
    packages: processed 45/3487 blames (9.04/s)

By default, contrib will sample 50 commits from your repository and plot them. If you want it to plot fewer samples, you can run contrib --samples SAMPLES where SAMPLES is a number of your choosing. contrib tries to use the available processors on the machine it is run, and by default it will run parallel git blame jobs. You can control the parallelism with the --jobs JOBS argument.

contrib has to run git blame for each sampled commit and for each file matched by the parts section of your contrib.yaml file (or for all files if parts is not provided), so it can take a long time to run if your repo's history is long. contrib's output shows how many git blame calls remain and how fast blames are currently completing.

Cached data

contrib caches results of git blame in a directory called line-data. For large repositories, this can get to be quite large, so make sure you have a decent amount of space available (gigabytes for large repositories).


Contrib is part of the Spack project. Spack is distributed under the terms of both the MIT license and the Apache License (Version 2.0). Users may choose either license, at their option.

All new contributions must be made under both the MIT and Apache-2.0 licenses.


SPDX-License-Identifier: (Apache-2.0 OR MIT)


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