Set up Continuous Integration via GH Actions (#450)

Merge pull request 450

.github/workflows/ci.yml

@@ -0,0 +1,103 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+
+jobs:
+  j4:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    name: "Jekyll ${{ matrix.jekyll_version }} (Ruby ${{ matrix.ruby_version }})"
+    runs-on: 'ubuntu-latest'
+    env:
+      JEKYLL_VERSION: ${{ matrix.jekyll_version }}
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby_version:
+        - 2.5
+        - 2.7
+        - 3.0
+        jekyll_version:
+        - "~> 4.0"
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 5
+      - name: "Set up Ruby ${{ matrix.ruby_version }}"
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby_version }}
+          bundler-cache: true
+      - name: Execute tests
+        run:  bundle exec rspec
+  j3:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    name: "Jekyll ${{ matrix.jekyll_version }} (Ruby ${{ matrix.ruby_version }})"
+    runs-on: 'ubuntu-latest'
+    env:
+      JEKYLL_VERSION: ${{ matrix.jekyll_version }}
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby_version:
+        - 2.5
+        jekyll_version:
+        - "~> 3.9"
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 5
+      - name: "Set up Ruby ${{ matrix.ruby_version }}"
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby_version }}
+          bundler-cache: true
+      - name: Execute tests
+        run:  bundle exec rspec
+
+  style_check:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    name: "Code Style Check (Ruby ${{ matrix.ruby_version }})"
+    runs-on: 'ubuntu-latest'
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby_version:
+        - 2.5
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 5
+      - name: "Set up Ruby ${{ matrix.ruby_version }}"
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby_version }}
+          bundler-cache: true
+      - name: Check Style Offenses
+        run:  bundle exec rubocop -S -D
+
+  gem_build:
+    if: "!contains(github.event.commits[0].message, '[ci skip]')"
+    name: "Test Gem build (Ruby ${{ matrix.ruby_version }})"
+    runs-on: 'ubuntu-latest'
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby_version:
+        - 2.5
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 5
+      - name: "Set up Ruby ${{ matrix.ruby_version }}"
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby_version }}
+          bundler-cache: true
+      - name: Test Gem build
+        run:  bundle exec gem build jekyll-seo-tag.gemspec

.travis.yml

@@ -1,18 +0,0 @@
-language: ruby
-cache: bundler
-rvm:
-  - 2.5
-  - 2.7
-
-before_install:
-  - gem update --system
-  - gem install bundler
-
-script: script/cibuild
-
-env:
-  global:
-    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
-  matrix:
-    - JEKYLL_VERSION="~> 3.9"
-    - JEKYLL_VERSION="~> 4.0"