use if: for Clang suppression

Author: mohawk2

github-actions/ci-dist/action.yml

@@ -168,19 +168,18 @@ runs:
 
     - name: setup Clang noise suppression (MacOS)
       shell: bash
+      if: runner.os == 'macOS'
       run: |
-          # This is needed for Clang 12 due to
-          # <https://github.com/Perl/perl5/issues/18780>.
-          echo "::group::setup Clang noise suppression (MacOS)"
-          if ${{ toJSON( runner.os == 'macOS' ) }}; then
-            PATCH_EUMM_DIR=$HOME/build_aux
-            [ -d $PATCH_EUMM_DIR ] || mkdir $PATCH_EUMM_DIR
-            if [ ! -f $PATCH_EUMM_DIR/clang12_no_warnings.pm ]; then
-              echo 'package clang12_no_warnings; use ExtUtils::MakeMaker::Config; $Config{ccflags} = join " ", $Config{ccflags}, "-Wno-compound-token-split-by-macro"; 1;' > $PATCH_EUMM_DIR/clang12_no_warnings.pm
-              echo "PERL5OPT=${PERL5OPT:+${PERL5OPT} }-I$PATCH_EUMM_DIR -Mclang12_no_warnings" >> $GITHUB_ENV
-            fi
-          fi
-          echo "::endgroup::"
+        # This is needed for Clang 12 due to
+        # <https://github.com/Perl/perl5/issues/18780>.
+        echo "::group::setup Clang noise suppression (MacOS)"
+        PATCH_EUMM_DIR=$HOME/build_aux
+        [ -d $PATCH_EUMM_DIR ] || mkdir $PATCH_EUMM_DIR
+        if [ ! -f $PATCH_EUMM_DIR/clang12_no_warnings.pm ]; then
+          echo 'package clang12_no_warnings; use ExtUtils::MakeMaker::Config; $Config{ccflags} = join " ", $Config{ccflags}, "-Wno-compound-token-split-by-macro"; 1;' > $PATCH_EUMM_DIR/clang12_no_warnings.pm
+          echo "PERL5OPT=${PERL5OPT:+${PERL5OPT} }-I$PATCH_EUMM_DIR -Mclang12_no_warnings" >> $GITHUB_ENV
+        fi
+        echo "::endgroup::"
     # Shared step for setting up graphical display.
     - name: Set up graphical display
       shell: bash