[GR-18163] Fix GitHub Actions CI to handle mxbuild/truffleruby-* being symlinks

PullRequest: truffleruby/2502

Author: eregon

.github/workflows/ci.yml

@@ -60,12 +60,14 @@ jobs:
       run: jt build
 
     - name: Create archive
-      run: tar cf truffleruby-jvm.tar truffleruby-jvm
-      working-directory: build/mxbuild
+      run: |
+        cd $(dirname $(jt graalvm-home))
+        mv $(basename $(jt graalvm-home)) truffleruby-jvm
+        tar cf ${{ github.workspace }}/truffleruby-jvm.tar truffleruby-jvm
     - uses: actions/upload-artifact@v2
       with:
         name: truffleruby-jvm
-        path: build/mxbuild/truffleruby-jvm.tar
+        path: ${{ github.workspace }}/truffleruby-jvm.tar
 
   build_native:
     name: build native
@@ -104,12 +106,14 @@ jobs:
         run: jt build --env native
 
       - name: Create archive
-        run: tar cf truffleruby-native.tar truffleruby-native
-        working-directory: build/mxbuild
+        run: |
+          cd $(dirname $(jt -u native graalvm-home))
+          mv $(basename $(jt -u native graalvm-home)) truffleruby-native
+          tar cf ${{ github.workspace }}/truffleruby-native.tar truffleruby-native
       - uses: actions/upload-artifact@v2
         with:
           name: truffleruby-native
-          path: build/mxbuild/truffleruby-native.tar
+          path: ${{ github.workspace }}/truffleruby-native.tar
 
   fast_specs:
     name: fast specs

tool/jt.rb

@@ -731,6 +731,7 @@ def help
       jt sync                                       continuously synchronize changes from the Ruby source files to the GraalVM build
       jt idea                                       generates IntelliJ projects
       jt format                                     run eclipse code formatter
+      jt graalvm-home                               prints the GraalVM home of the RUBY_SELECTOR
 
       you can also put --build or --rebuild in front of any command to build or rebuild first
 
@@ -759,6 +760,10 @@ def launcher
     puts ruby_launcher
   end
 
+  define_method(:'graalvm-home') do
+    puts graalvm_home
+  end
+
   def build(*options)
     project = options.shift
     case project