Update CI for coveralls.

Author: gkellogg

.github/workflows/ci.yml

@@ -15,11 +15,11 @@ jobs:
     runs-on: ubuntu-latest
     env:
       CI: true
+      ALLOW_FAILURES: ${{ endsWith(matrix.ruby, 'head') }}
     strategy:
       fail-fast: false
       matrix:
         ruby:
-          - 2.4
           - 2.5
           - 2.6
           - 2.7
@@ -35,5 +35,9 @@ jobs:
       - name: Install dependencies
         run: bundle install --jobs 4 --retry 3
       - name: Run tests
-        run: bundle exec rspec spec
- 
+        run: bundle exec rspec spec || $ALLOW_FAILURES
+      - name: Coveralls GitHub Action
+        uses: coverallsapp/github-action@v1.1.2
+        if: "matrix.ruby == '3.0'"
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

Gemfile

@@ -2,8 +2,8 @@ source "https://rubygems.org"
 gemspec
 
 group :development, :test do
-  gem 'simplecov',  platforms: :mri
-  gem 'coveralls',  '~> 0.8', platforms: :mri
+  gem 'simplecov', '~> 0.21',  platforms: :mri
+  gem 'simplecov-lcov', '~> 0.8',  platforms: :mri
   gem 'benchmark-ips'
   gem 'rake'
 end

spec/spec_helper.rb

@@ -5,10 +5,17 @@
 
 begin
   require 'simplecov'
-  require 'coveralls' unless ENV['NOCOVERALLS']
+  require 'simplecov-lcov'
+
+  SimpleCov::Formatter::LcovFormatter.config do |config|
+    #Coveralls is coverage by default/lcov. Send info results
+    config.report_with_single_file = true
+    config.single_report_path = 'coverage/lcov.info'
+  end
+
   SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter.new([
     SimpleCov::Formatter::HTMLFormatter,
-    (Coveralls::SimpleCov::Formatter unless ENV['NOCOVERALLS'])
+    SimpleCov::Formatter::LcovFormatter
   ])
   SimpleCov.start do
     add_filter "/spec/"