Switch from travis to github actions for unit tests (#1206)

Migrate to github actions as travis has switched to a process that will
require requesting minutes regularly for open source projects, and
current development is slow enough that this additional overhead is too
much.

Correct the generation of the line coverage following the example at
coverallsapp/github-action#29. Remove dependency on coveralls
gem as no longer needed if using the action.

Patch older versions of simplecov to contain a branch_coverage?
method to ensure working with simplecov-lcov.

.coveralls.yml

@@ -1 +1 @@
-service_name: travis-ci
+service_name: github-actions

.github/workflows/unit-tests.yml

@@ -0,0 +1,90 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: CI
+
+on:
+  push:
+    branches: [ $default-branch ]
+  pull_request:
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.allow_fail }}
+    strategy:
+      fail-fast: false
+      matrix:
+        # need to define one entry with a single entry for each of the options
+        # to allow include to expand the matrix correctly.
+        ruby: [2.6.6]
+        vagrant: [main]
+        allow_fail: [true]
+        include:
+          - ruby: 2.2.10
+            vagrant: v2.0.4
+            allow_fail: false
+          - ruby: 2.3.5
+            vagrant: v2.1.5
+            allow_fail: false
+          - ruby: 2.4.10
+            vagrant: v2.2.4
+            allow_fail: false
+          - ruby: 2.6.6
+            vagrant: v2.2.14
+            allow_fail: false
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up libvirt
+      run: |
+        sudo apt-get update
+        sudo apt-get install libvirt-dev
+    - uses: actions/cache@v2
+      with:
+        path: vendor/bundle
+        key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gems-
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+    - name: Set up rubygems
+      run: |
+        gem update --system --conservative || (gem i "rubygems-update:~>2.7" --no-document && update_rubygems)
+        gem update bundler --conservative
+    - name: Run bundler using cached path
+      run: |
+        bundle config path vendor/bundle
+        bundle install --jobs 4 --retry 3
+      env:
+        VAGRANT_VERSION: ${{ matrix.vagrant }}
+    - name: Run tests
+      run: |
+        bundle exec rspec --color --format documentation
+        cat ./coverage/lcov.info
+      env:
+        VAGRANT_VERSION: ${{ matrix.vagrant }}
+    - name: Coveralls Parallel
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.github_token }}
+        flag-name: run-${{ matrix.vagrant }}
+        parallel: true
+
+
+  finish:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: Coveralls Finished
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.github_token }}
+        parallel-finished: true

.travis.yml

@@ -1,34 +0,0 @@
----
-language: ruby
-dist: xenial
-before_install:
-  - gem update --system --conservative || (gem i "rubygems-update:~>2.7" --no-document && update_rubygems)
-  - gem update bundler --conservative
-addons:
-  apt:
-    packages: libvirt-dev
-    update: true
-language: ruby
-cache: bundler
-install: bundle install
-script: bundle exec rspec --color --format documentation
-notifications:
-  email: false
-env:
-  global:
-    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
-
-jobs:
-  include:
-    - rvm: 2.2.10
-      env: VAGRANT_VERSION=v2.0.4
-    - rvm: 2.3.5
-      env: VAGRANT_VERSION=v2.1.5
-    - rvm: 2.4.10
-      env: VAGRANT_VERSION=v2.2.4
-    - rvm: 2.6.6
-      env: VAGRANT_VERSION=v2.2.14
-    - rvm: 2.6.6
-      env: VAGRANT_VERSION=master
-  allow_failures:
-    - env: VAGRANT_VERSION=master

Gemfile

@@ -36,5 +36,3 @@ end
 group :plugins do
   gemspec
 end
-
-gem 'coveralls', require: false

spec/spec_helper.rb

@@ -1,9 +1,29 @@
 require 'simplecov'
-require 'coveralls'
+require 'simplecov-lcov'
 
-SimpleCov.formatter = Coveralls::SimpleCov::Formatter
+# patch simplecov configuration
+if ! SimpleCov::Configuration.method_defined? :branch_coverage?
+  module SimpleCov
+    module Configuration
+      def branch_coverage?
+        return false
+      end
+    end
+  end
+end
+
+SimpleCov::Formatter::LcovFormatter.config do |config|
+  config.report_with_single_file = true
+  config.single_report_path = 'coverage/lcov.info'
+end
+
+SimpleCov.formatters = SimpleCov::Formatter::MultiFormatter.new(
+  [
+    SimpleCov::Formatter::HTMLFormatter,
+    SimpleCov::Formatter::LcovFormatter,
+  ]
+)
 SimpleCov.start do
-  enable_coverage :branch if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('2.5')
   add_filter 'spec/'
 end
 

vagrant-libvirt.gemspec

@@ -20,6 +20,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rspec-expectations", "~> 3.5.0"
   s.add_development_dependency "rspec-mocks", "~> 3.5.0"
   s.add_development_dependency "simplecov"
+  s.add_development_dependency "simplecov-lcov"
 
   s.add_runtime_dependency 'fog-libvirt', '>= 0.6.0'
   s.add_runtime_dependency 'fog-core', '~> 2.1'