ci: separate job for testing source gem

because the way it was set up in the native gem job matrix, the linux
native test was getting clobbered by the source test config.

Author: flavorjones

.github/workflows/ci.yml

@@ -66,21 +66,21 @@ jobs:
           rm -rf tmp/build-cache
           mv tmp/build-cache-new tmp/build-cache
 
+      - name: Basic tests on the generated image
+        env:
+          TEST_PLATFORM: ${{ matrix.platform }}
+        run: |
+          bundle exec rake test
+
       - name: Build rcd_test.gem
         run: |
           gem build rake-compiler-dock.gemspec
           gem install -l rake-compiler-dock-*.gem
           cd test/rcd_test/
-          bundle install
+          bundle install --local
           bundle exec rake clean clobber
           bundle exec rake gem:${PLATFORM}
 
-      - name: Basic tests on the generated image
-        env:
-          TEST_PLATFORM: ${{ matrix.platform }}
-        run: |
-          bundle exec rake test
-
       - name: Upload binary gem
         uses: actions/upload-artifact@v3
         with:
@@ -95,7 +95,7 @@ jobs:
           path: test/rcd_test/pkg/*-?.?.?.gem
 
       - if: contains(matrix.platform, 'x64-mingw')
-        name: Build static rcd_test.gem
+        name: Build static rcd_test.gem for windows
         env:
           RCD_TEST_CONFIG: "--link-static"
         run: |
@@ -107,12 +107,46 @@ jobs:
           bundle exec rake gem:${PLATFORM}
 
       - if: contains(matrix.platform, 'x64-mingw')
-        name: Upload static binary gem
+        name: Upload static rcd_test.gem
         uses: actions/upload-artifact@v3
         with:
           name: gem-${{ matrix.platform }}-static
           path: test/rcd_test/pkg/*-*-*.gem
 
+  job_test_source:
+    name: source gem
+    needs: docker_build
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu
+        ruby:
+          - "3.2"
+          - "3.1"
+          - "3.0"
+          - "2.7"
+          - "2.6"
+          - "2.5"
+          - "2.4"
+    runs-on: ${{ matrix.os }}-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+      - name: Download gem-ruby
+        uses: actions/download-artifact@v3
+        with:
+          name: gem-ruby
+      - name: Install gem-ruby
+        run: gem install --local *.gem --verbose
+      - name: Run tests
+        run: |
+          cd test/rcd_test/
+          bundle install
+          ruby -rrcd_test -S rake test
+
   job_test_native:
     name: native
     needs: docker_build
@@ -138,8 +172,6 @@ jobs:
             platform: x86_64-darwin
           - os: ubuntu
             platform: x86_64-linux
-          - os: ubuntu
-            platform: ruby
           - os: ubuntu
             ruby: jruby-head
             platform: jruby