This is a collection of the slideshow and resources referenced and provided during the "Off-Grid Plugins: Updates Outside of WordPress.org" presentation by Mike Karikas. Quick reference to the final plugin server can be found at github.com/karikas/wordpress-remote-plugin-updates.
An off-grid plugin is a plugin not stored on WordPress.org, but still has all the neat features of one (updates, robust information, pictures, etc)
Chances are pretty good that the remote server URLs will be offline within a week of this presentation.
wcoc-off-grid-plugins
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│ README.md This file
│ WCOC 2018 - Off-Grid Plugins.pdf Presentation slides in PDF format
│ server-tests.html Static HTML page to ping different plugin update servers and see the results
│ wp-update-check.json Example of data returned from WordPress's Plugins Directory for an update request
│
└───example-1 "Quick-n-Dirty" solution, example ARR Matey! plugin files and server code
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└───example-2 WordPress-based solution, example ARR Matey! plugin files and server code
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└───example-4 Final plugin server solution, example ARR Matey! plugin files and server code