Extracting / Exporting custom emoji from Slack

00_README

This builds off the excellent work of @lmarkus.

The scripts below can be used in conjunction with the Slack Emoji Tools Google Chrome extension to export emojis from
one Slack team and import into another team. 

Original work here: https://gist.github.com/lmarkus/8722f56baf8c47045621

01_extract.js

// Login to your team through the browser. 
// Go to: https://<team name>.slack.com/customize/emoji
// Run this on the browser's dev tools javascript console

var emojis = $('.emoji_row');
var numEmojis = emojis.size();

var pre = document.createElement('pre');
pre.append('[\n');

emojis.each(function (index) {
  var url = $(this).find('td:nth-child(1) span').attr('data-original');
  var extension = url.substring(url.lastIndexOf('.'));
  var name = $(this).find('td:nth-child(2)').html().replace(/:|\s/g, '');
  pre.append(JSON.stringify({name: name, extension: extension, url: url}));
  if (index == (numEmojis-1)) {
    pre.append('\n]');
  } else {
    pre.append(',\n');
  }
});

$('body').append(pre);

// Now, at the bottom of the page you'll see the json representation of all the emoji data
// copy and paste the json into a file and use with 02_download.sh

02_download.sh

#!/usr/bin/env bash
# Use: 
# Make this file executable, and feed it the results from the Slack emoji URL dump. Files will be downloaded to `output`
# 	chmod +x download.sh
# 	./download.sh emojiURLs.txt
#
# Note: This depends on the jq utility for parsing json from the command line - https://stedolan.github.io/jq/

mkdir -p output;

jq -r '.[] | "curl -s -o \"output/\(.name)\(.extension)\" \"\(.url)\""' $1 | \
while read -r line; do eval "$line"; done

# You can now drag and drop all the emoji files in the output folder to the Buld Emoji Uploader space that you'll see on
# the https://<team>.slack.com/customize/emoji page if you've installed the chrome extension
# https://chrome.google.com/webstore/detail/slack-emoji-tools/anchoacphlfbdomdlomnbbfhcmcdmjej