This is a fork of libyear as it appears to no longer be maintained.

[py]libyear

A simple measure of software dependency freshness. It is a single number telling you how up-to-date your dependencies are.

https://libyear.com/

How to install

Using uvx

uvx --from pylibyear libyear --help

Using pip

pip install pylibyear

Using pipx

pipx install pylibyear

Usage

libyear --help

A requirement text file

libyear text requirements.txt

A pyproject.toml file

libyear toml pyproject.toml

Example output

libyear text requirements.txt
+-------------------------+-----------------+----------------+-----------------+
|         Library         | Current Version | Latest Version | Libyears behind |
+-------------------------+-----------------+----------------+-----------------+
|           pytz          |      2015.2     |     2019.3     |       4.54      |
|         urllib3         |      1.15.1     |     1.25.7     |       3.58      |
|         astroid         |      1.5.3      |     2.3.3      |       2.43      |
|          django         |     1.11.23     |      3.0       |       0.34      |
|      django-celery      |      3.2.1      |     3.3.1      |       2.54      |
|        httpretty        |      0.8.3      |     0.9.7      |       5.31      |
|         Pygments        |       1.6       |     2.5.2      |       6.81      |
|          flake8         |      3.6.0      |     3.7.9      |       1.01      |
|      django-waffle      |      0.14.0     |     0.18.0     |       1.66      |
|    requests_oauthlib    |      0.8.0      |     1.3.0      |       2.72      |
|   django-debug-toolbar  |       1.8       |      2.1       |       2.52      |
|         libsass         |      0.13.3     |     0.19.4     |       2.06      |
|     django-storages     |      1.6.6      |      1.8       |       1.65      |
|      edx-i18n-tools     |      0.4.2      |     0.5.0      |       2.02      |
|           six           |      1.10.0     |     1.13.0     |       4.08      |
|   djangorestframework   |      3.6.3      |     3.11.0     |       2.58      |
|          isort          |      4.2.15     |     4.3.21     |       2.05      |
|         futures         |      2.1.6      |     3.3.0      |       5.5       |
|          Pillow         |      2.7.0      |     6.2.1      |       4.8       |
| edx-django-release-util |      0.3.1      |     0.3.2      |       2.44      |
|      beautifulsoup4     |      4.6.0      |     4.8.1      |       2.42      |
|       mysqlclient       |   1.4.2.post1   |     1.4.6      |       0.77      |
|         newrelic        |    4.14.0.115   |   5.4.0.132    |       0.78      |
|          redis          |      2.10.6     |     3.3.11     |       2.16      |
|         oauthlib        |      2.1.0      |     3.1.0      |       1.21      |
|        django-ses       |      0.7.1      |     0.8.13     |       3.65      |
|           mock          |      1.3.0      |     3.0.5      |       3.79      |
|      django-hamlpy      |      1.1.1      |      1.2       |       1.52      |
|          bottle         |      0.12.9     |    0.12.18     |       4.1       |
|      pylint-django      |      0.7.2      |     2.0.13     |       3.44      |
|       user-agents       |      1.1.0      |      2.0       |       2.13      |
|          jsmin          |      2.2.1      |     2.2.2      |       1.15      |
|         Markdown        |       2.4       |     3.1.1      |       5.26      |
|         gunicorn        |      0.17.4     |     20.0.4     |       6.59      |
|         requests        |      2.18.4     |     2.22.0     |       1.75      |
|          pylint         |      1.7.2      |     2.4.4      |       2.39      |
+-------------------------+-----------------+----------------+-----------------+
Your system is 103.78 libyears behind

Example 1

For example, a rails 5.0.0 dependency (released June 30, 2016) is roughly 1 libyear behind the 5.1.2 version (released June 26, 2017).

Simpler is Better

There are obviously more nuanced ways to calculate dependency freshness. The advantage of this approach is its simplicity. You will be able to explain this calculation to your colleagues in about 30s.

Example 2

If your system has two dependencies, the first one year old, the second three, then your system is four libyears out-of-date.

A Healthy App

Apps below 10 libyears are considered to be healthy apps. We regularly rescue projects that are over 100 libyears behind.

Etymology

"lib" is short for "library", the most common form of dependency.

References

J. Cox, E. Bouwers, M. van Eekelen and J. Visser, Measuring Dependency Freshness in Software Systems. In Proceedings of the 37th International Conference on Software Engineering (ICSE 2015), May 2015 https://ericbouwers.github.io/papers/icse15.pdf

Dev

To install dependencies

uv sync --all-extras

Then run this command to install in editable mode for local development

uv pip install -e .

Available justfile recipes:

just