.github/workflows/baseruby.yml: add

Translate a part of .travis.yml into a Github Actions workflow.

.github/workflows/baseruby.yml

@@ -0,0 +1,47 @@
+name: BASERUBY Check
+
+on: [push, pull_request]
+
+jobs:
+  baseruby:
+    name: BASERUBY
+    runs-on: ubuntu-20.04
+    if: "!contains(github.event.head_commit.message, '[ci skip]')"
+    strategy:
+      matrix:
+        ruby:
+          - ruby-2.2
+          - ruby-2.3
+          - ruby-2.4
+          - ruby-2.5
+          - ruby-2.6
+          - ruby-2.7
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler: none
+      - run: echo "make=make -sj$((1 + $(nproc --all)))" >> $GITHUB_ENV
+      - run: sudo apt-get install build-essential autoconf bison
+      - run: autoconf
+      - run: ./configure --disable-install-doc
+      - run: $make update-unicode
+      - run: $make common-srcs
+      - run: $make incs
+      - run: $make all
+      - run: $make test
+      - uses: k0kubun/action-slack@v2.0.0
+        with:
+          payload: |
+            {
+              "ci": "GitHub Actions",
+              "env": "${{ github.workflow }} / BASERUBY @ ${{ matrix.ruby }}",
+              "url": "https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}",
+              "commit": "${{ github.sha }}",
+              "branch": "${{ github.ref }}".split('/').reverse()[0]
+            }
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot
+        if: failure() && github.event_name == 'push'

.travis.yml

@@ -233,19 +233,11 @@ env:
         zlib1g-dev:armhf
         zlib1g:armhf
 
-  - &baseruby
-    name: "BASERUBY: Ruby 2.2"
-    <<: *gcc-8
-    <<: *make-test-only
-    language: ruby
-    rvm: 2.2
-
 matrix:
   include:
     # Build every commit:
     - <<: *x86_64-linux
     - <<: *i686-linux
-    - <<: *baseruby
     # Build every commit (Allowed Failures):
     - <<: *arm32-linux
     - <<: *arm64-linux