feat: add Rocky Linux support

[lengau]

Summary

Rocky Linux is a community-driven, RHEL-compatible enterprise Linux distribution developed by the Rocky Enterprise Software Foundation (RESF). It was created as a downstream rebuild of Red Hat Enterprise Linux (RHEL) after CentOS shifted to a rolling-release model. Rocky Linux provides binary compatibility with RHEL and targets production workloads requiring long-term support.

Lifecycle Data Source

Rocky Linux follows a 10-year lifecycle mirroring RHEL, with a full support phase (~5 years) followed by a maintenance phase. Major versions are released roughly every 3 years.

Official sources:

• https://rockylinux.org/news/rocky-linux-faq/ — FAQ covering support lifecycle
• https://wiki.rockylinux.org/rocky/version/ — Rocky Linux version and support policy wiki page
• https://endoflife.date/rocky-linux — aggregated lifecycle data page

Machine-readable data:

The endoflife.date API provides structured lifecycle data:

• API endpoint: https://endoflife.date/api/rocky-linux.json
• Sample data (as of 2026-04-21):
  • Rocky Linux 10: released 2025-06-11, full support until 2030-05-31, EOL 2035-05-31
  • Rocky Linux 9: released 2022-07-14, full support until 2027-05-31, EOL 2032-05-31
  • Rocky Linux 8: released 2021-05-01, full support until 2024-05-31, EOL 2029-05-31

Notes

• Rocky Linux tracks RHEL releases closely, so its lifecycle dates mirror RHEL.
• There is no separate JSON/YAML published on rockylinux.org itself; the endoflife.date API is the best machine-readable source.
• Minor point releases (e.g. 8.10, 9.7) are released within the major version lifecycle; only major version EOL dates are relevant for this library.

[lengau]

Upstream machine-readable source (from endoflife.date)

The endoflife.date scraper uses a raw Markdown file from the Rocky Linux wiki Git repository:

Source URL: https://raw.githubusercontent.com/rocky-linux/wiki.rockylinux.org/refs/heads/main/include/releng/version_table.md

This is a machine-readable Markdown table with columns including Release, Release Date, Active Support Ends, and End of Life — exactly the fields needed.

Example

curl -s https://raw.githubusercontent.com/rocky-linux/wiki.rockylinux.org/refs/heads/main/include/releng/version_table.md

Python parsing example

import urllib.request, re

url = 'https://raw.githubusercontent.com/rocky-linux/wiki.rockylinux.org/refs/heads/main/include/releng/version_table.md'
content = urllib.request.urlopen(url).read().decode()

# Parse markdown table rows (skip header and separator)
rows = [line.strip().strip('|').split('|') for line in content.splitlines() if line.startswith('|') and '---' not in line]
headers = [h.strip() for h in rows[0]]
for row in rows[1:]:
    data = dict(zip(headers, [c.strip() for c in row]))
    print(data)

This is an excellent source — it's version-controlled, updated by the Rocky Linux project directly, and has precisely the fields we need.