Init the project

.github/workflows/tweet.yml

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+name: tweet
+
+on:
+  schedule:
+    - cron:  '42 10 * * *' # Tweet every 18:42 (GMT +8)
+
+jobs:
+  build-deploy:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        node-version: [8]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Setup ruby
+      uses: eregon/use-ruby-action@master
+      with:
+        ruby-version: 2.7
+    - name: Install Dependencies
+      run: |
+        gem install bundler
+        bundle install --jobs 4 --retry 3
+    - name: Build
+      run: |
+        ruby relay.rb

Gemfile

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+source 'https://rubygems.org'
+
+gem 'twitter', '~> 7.0.0'
+gem 'faraday', '~> 1.0.0'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    buftok (0.2.0)
+    domain_name (0.5.20190701)
+      unf (>= 0.0.5, < 1.0.0)
+    equalizer (0.0.11)
+    faraday (1.0.1)
+      multipart-post (>= 1.2, < 3)
+    ffi (1.13.1)
+    ffi-compiler (1.0.1)
+      ffi (>= 1.0.0)
+      rake
+    http (4.4.1)
+      addressable (~> 2.3)
+      http-cookie (~> 1.0)
+      http-form_data (~> 2.2)
+      http-parser (~> 1.2.0)
+    http-cookie (1.0.3)
+      domain_name (~> 0.5)
+    http-form_data (2.3.0)
+    http-parser (1.2.2)
+      ffi-compiler
+    http_parser.rb (0.6.0)
+    memoizable (0.4.2)
+      thread_safe (~> 0.3, >= 0.3.1)
+    multipart-post (2.1.1)
+    naught (1.1.0)
+    public_suffix (4.0.6)
+    rake (13.0.1)
+    simple_oauth (0.3.1)
+    thread_safe (0.3.6)
+    twitter (7.0.0)
+      addressable (~> 2.3)
+      buftok (~> 0.2.0)
+      equalizer (~> 0.0.11)
+      http (~> 4.0)
+      http-form_data (~> 2.0)
+      http_parser.rb (~> 0.6.0)
+      memoizable (~> 0.4.0)
+      multipart-post (~> 2.0)
+      naught (~> 1.0)
+      simple_oauth (~> 0.3.0)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.7)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  faraday (~> 1.0.0)
+  twitter (~> 7.0.0)
+
+BUNDLED WITH
+   2.1.4

relay.rb

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+require 'faraday'
+require 'twitter'
+require 'json'
+require 'date'
+
+client = Twitter::REST::Client.new do |config|
+  config.consumer_key        = ENV['CONSUMER_KEY']
+  config.consumer_secret     = ENV['CONSUMER_SECRET']
+  config.bearer_token        = ENV['BEARER_TOKEN']
+  config.access_token        = ENV['ACCESS_TOKEN']
+  config.access_token_secret = ENV['ACCESS_TOKEN_SECRET']
+end
+
+INTERVAL = 24 * 60 * 60 # 1 day
+
+resp = Faraday.get(
+  'https://ruby-china.org/api/v3/topics',
+  { type: 'excellent' },
+  { 'Accept': 'application/json' }
+)
+
+topics = JSON.parse(resp.body)['topics']
+
+filtered = topics.reject do |topic|
+  Time.now - DateTime.parse(topic['created_at']).to_time > INTERVAL
+end
+
+formatted = filtered.map do |topic|
+  "《#{topic['title']}》作者：#{topic['user']['name']}\n\nhttps://ruby-china.org/topics/#{topic['id']}\n\n（本消息由 Ruby China 机器人自动发送）"
+end
+
+formatted.each do |tweet|
+  client.update(tweet)
+end
+
+puts 'OK!'