Ruby: fix conditional use of cross in build

Author: hmac

.github/workflows/ruby-build.yml

@@ -81,17 +81,14 @@ jobs:
       - name: Run tests
         if: steps.cache-extractor.outputs.cache-hit != 'true'
         run: cd extractor && cargo test --verbose
-      - name: Release build
-        if: steps.cache-extractor.outputs.cache-hit != 'true'
-        # On linux, build the extractor via cross in a centos7 container.
-        # This ensures we don't depend on glibc > 2.17.
-        run: |
-          if [[ "$RUNNER_OS" == "Linux" ]]; then
-            CARGO=cross
-          else
-            CARGO=cargo
-          fi
-          cd extractor && "$CARGO" build --release
+      # On linux, build the extractor via cross in a centos7 container.
+      # This ensures we don't depend on glibc > 2.17.
+      - name: Release build (linux)
+        if: steps.cache-extractor.outputs.cache-hit != 'true' && runner.os == 'Linux'
+        run: cd extractor && cross build --release
+      - name: Release build (windows and macos)
+        if: steps.cache-extractor.outputs.cache-hit != 'true' && runner.os != 'Linux'
+        run: cd extractor && cargo build --release
       - name: Generate dbscheme
         if: ${{ matrix.os == 'ubuntu-latest' && steps.cache-extractor.outputs.cache-hit != 'true'}}
         run: extractor/target/release/generator --dbscheme ql/lib/ruby.dbscheme --library ql/lib/codeql/ruby/ast/internal/TreeSitter.qll