honkoma/docs/config/custom_emoji.md

Custom Emoji

To add custom emoji:

• Add the image file(s) to priv/static/emoji/custom
• In case of conflicts: add the desired shortcode with the path to config/custom_emoji.txt, comma-separated and one per line
• Force recompilation (mix clean && mix compile)

Example:

image files (in /priv/static/emoji/custom): happy.png and sad.png

content of config/custom_emoji.txt:

happy, /emoji/custom/happy.png, Tag1,Tag2
sad, /emoji/custom/sad.png, Tag1
foo, /emoji/custom/foo.png

The files should be PNG (APNG is okay with .png for image/png Content-type) and under 50kb for compatibility with mastodon.

Emoji tags (groups)

Default tags are set in config.exs. To set your own tags, copy the structure to your secrets file (prod.secret.exs or dev.secret.exs) and edit it.

config :pleroma, :emoji,
  shortcode_globs: ["/emoji/custom/**/*.png"],
  groups: [
    Finmoji: "/finmoji/128px/*-128.png",
    Custom: ["/emoji/*.png", "/emoji/custom/*.png"]
  ]

Order of the groups matters, so to override default tags just put your group on top of the list. E.g:

config :pleroma, :emoji,
  shortcode_globs: ["/emoji/custom/**/*.png"],
  groups: [
    "Finmoji special": "/finmoji/128px/a_trusted_friend-128.png", # special file
    "Cirno": "/emoji/custom/cirno*.png", # png files in /emoji/custom/ which start with `cirno`
    "Special group": "/emoji/custom/special_folder/*.png", # png files in /emoji/custom/special_folder/
    "Another group": "/emoji/custom/special_folder/*/.png", # png files in /emoji/custom/special_folder/ subfolders
    Finmoji: "/finmoji/128px/*-128.png",
    Custom: ["/emoji/*.png", "/emoji/custom/*.png"]
  ]

Priority of tags assigns in emoji.txt and custom.txt:

tag in file > special group setting in config.exs > default setting in config.exs

Priority for globs:

special group setting in config.exs > default setting in config.exs