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Add more profile metadata fields to Mastodon

Introduction

I run the disobey.net and nautical.social Mastodon instances and I very much dislike the max character limitations in posts (toots) and in my profile bio(s). I've documented the changes i've made to increase the limits from 500 to 4096. I self-host Mastodon on a standalone server built from source, not Docker.

Directions for Mastodon v4.3.2

All file editing below is from my Mastodon root directory, "~/live".

Post increase, from 500 to 4096

vim app/validators/status_length_validator.rb

class StatusLengthValidator < ActiveModel::Validator
  #MAX_CHARS = 500
  MAX_CHARS = 4096
  URL_PLACEHOLDER_CHARS = 23
  URL_PLACEHOLDER = 'x' * 23

Note length increase, from 500 to 4096

vim app/models/account.rb

  USERNAME_RE   = /[a-z0-9_]+([.-]+[a-z0-9_]+)*/i
  MENTION_RE    = %r{(?<![=/[:word:]])@((#{USERNAME_RE})(?:@[[:word:]]+([.-]+[[:word:]]+)*)?)}
  URL_PREFIX_RE = %r{\Ahttp(s?)://[^/]+}
  USERNAME_ONLY_RE = /\A#{USERNAME_RE}\z/i
  USERNAME_LENGTH_LIMIT = 30
  DISPLAY_NAME_LENGTH_LIMIT = 30
  #NOTE_LENGTH_LIMIT = 500
  NOTE_LENGTH_LIMIT = 4096

Finally

As the mastodon user:

RAILS_ENV=production bundle exec rails assets:precompile

As root user:

systemctl restart mastodon-web mastodon-sidekiq mastodon-streaming