new draft post

content/posts/2023-03-05-mastodon-snippets/index.md

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+title = 'Mastodon snippets'
+summary = 'snip snip'
+date = '2023-03-05T12:39:35+0100'
+categories = ['computerstuff']
+tags = ['mastodon','server','linux','reminders']
+draft = true
+
++++
+
+Very short und maybe a bit chaotic...
+
+## clear media files
+
+https://paste.opensuse.org/pastes/365542654a1e
+
+
+```bash
+#!/bin/bash
+export PATH="$HOME/.rbenv/bin:$PATH"
+eval "$(rbenv init -)"
+export RAILS_ENV=production
+
+exec > /home/mastodon/live/log/prune.log 2>&1
+
+/home/mastodon/live/bin/tootctl statuses remove
+/home/mastodon/live/bin/tootctl media remove --days=5
+/home/mastodon/live/bin/tootctl media remove --prune-profiles --days=60
+/home/mastodon/live/bin/tootctl preview_cards remove --days=15
+/home/mastodon/live/bin/tootctl media remove-orphans
+/home/mastodon/live/bin/tootctl cache clear
+/home/mastodon/live/bin/tootctl media usage
+date
+```
+
+## further removal of profile pics
+
+https://paste.opensuse.org/pastes/4ecbf69cdee7
+
+```bash
+#!/usr/bin/env bash
+# Kept only the accounts compression and jpeg optimization
+
+cd /home/mastodon/live/public/system/cache
+find -name '*.jpg' -print0 | xargs -0 jpegoptim --verbose --preserve --threshold=1 --max=45
+find -name '*.jpeg' -print0 | xargs -0 jpegoptim --verbose --preserve --threshold=1 --max=45
+
+cd /home/mastodon/live/public/system/cache/accounts
+find -name '*.png' -print0 | xargs -0 pngquant --verbose --ext=.png --force --speed 10 --quality 45-50 --skip-if-larger
+```
+
+## moar stuff in RAILS_ENV cnosole
+
+https://github.com/mastodon/mastodon/issues/14681
+
+There are several scripts executable with `RAILS_ENV=production bundle exec rails c`,
+for convenience laid out here with minor corrections. **Do not execute these
+without understanding what they do!**:
+
+Deleting all cached media attachments from external servers to allow web app
+to refetch them when they are queried. At least on my instance this is reaaally
+slow, takes tens of seconds per attachment (is this the same as tootctl media
+remove?):
+
+```ruby
+MediaAttachment.cached.where.not(remote_url: '').each do |attachment|
+  attachment.file.destroy
+  attachment.thumbnail.destroy
+  attachment.save
+end
+```
+
+Deleting and redownloading all cached remote emojis. This apparently has a
+problem that the local URLs for the cached emojis change, and the URLs aren't
+updated to the fetched profile headers. I suppose this should be done before
+the next steps, assuming the cached local emoji URLs are set up correctly to
+the profile headers and names at the time of fetching. This doesn't seem to
+work though, maybe tootctl emoji purge --remote-only would be better:
+
+```ruby
+CustomEmoji.remote.where.not(image_file_name: nil).where.not(image_remote_url: '').each do |emoji|
+  emoji.image.destroy
+  emoji.image.save
+  emoji.download_image!
+end
+```
+
+Deleting all remote profile avatars, and refetching them. Are these two the
+same as tootctl accounts refresh --all?:
+
+```ruby
+Account.remote.where.not(avatar_file_name: nil).where.not(avatar_remote_url: '').each do |a|
+  a.avatar.destroy
+  a.save
+  a.download_avatar!
+end
+```
+
+Deleting all remote profile headers, and refetching them. Hopefully this
+uses/updates the newly fetched local cached emoji URLs, and also includes the
+profile name as they often contain emojis:
+
+```ruby
+Account.remote.where.not(header_file_name: nil).where.not(header_remote_url: '').each do |a|
+  a.header.destroy
+  a.save
+  a.download_header!
+end
+```
+
+It would be awesome to get tooling for these to tootctl. That said, I'm not
+entirely sure if destroying the entities is necessary before downloading them
+again, and perhaps we could use remove_entity_cache instead. I'm not very well
+acquainted with the codebase.
+