git-repo-language-trends 0.0.3

Plots programming language usage over time in a git repository to an SVG file.

git-repo-language-trends

Analyze programming language usage over time in a git repository and produce a graphical or textual representation of the result.

Several output file formats are available:

• .svg - Scalable Vector Graphics
• .png - Portable Network Graphics
• .csv - Comma-separated values
• .tsv - Tab-separated values

Example command and its SVG output:

% cd ~/src/cpython
% git-repo-language-trends --max-commits 30 --min-interval-days 365 .c+.h .py

Installation

Installation requires pip>=19.0. When in doubt, begin by upgrading pip:

python3 -m pip install --upgrade pip

Then simply do

python3 -m pip install git-repo-language-trends

Usage

First go to the git repository for a project.

% cd ~/src/your-project

Then run the tool, passing the file extensions for the languages you are interested in as positional arguments:

% git-repo-language-trends .java .kt

For language with multiple file extensions such as C, you can use the + syntax which will automatically summarize line counts from both file extensions. To compare C and Rust:

% git-repo-language-trends .c+.h .rs

Method

Programming langauge usage is determined by the total number of newlines in files with a given file extension.

More examples

TODO

Performance

This program is pretty fast, because it uses the pygit2 wrapper for the C library libgit2. On a low-end computer (with an Intel(R) Celeron(R) J4005 CPU @ 2.00GHz) it counts ~400 000 lines per second.

Development

First clone this repo:

git clone https://github.com/Enselic/git-repo-language-trends.git

then make an editable install:

python3 -m pip install -e .

then make your changes. When done, lint and test:

flake8 && pytest -vv

TODO

• Fix CI to use Python 3.6 for app
• print info when auto caclulating extensions to use
• Add .tsv and .csv and .png and .svg CLI test cases
• handle shallow clones
• limit size of cache
• stacked percentage chart