Change the default testing branch for Julia tests (#1221)

We recently re-organised branches in `mmtk-julia` and `julia`. Namely
the previous `master` was renamed to `dev`, and we will use `master` for
the version that works with Julia upstream. This PR extracts the default
testing repos and branches, and changes the default testing branch for
Julia.

Author: qinsoon

.github/workflows/extended-tests-bindings.yml

@@ -125,6 +125,11 @@ jobs:
           ./.github/scripts/ci-setup.sh
           sed -i 's/^mmtk[[:space:]]=/#ci:mmtk=/g' mmtk/Cargo.toml
           sed -i 's/^#[[:space:]]mmtk/mmtk/g' mmtk/Cargo.toml
+      # removing these two LLVM installations as they cause a conflict within bindgen
+      - name: Hack to make bindgen work for Github images
+        run: |
+          sudo rm -rf /usr/lib/llvm-14
+          sudo rm -rf /usr/lib/llvm-13
       - name: Overwrite MMTk core in Julia binding
         run: |
           mkdir -p mmtk-julia/repos/mmtk-core

.github/workflows/pr-binding-refs.yml

@@ -69,6 +69,17 @@ on:
 jobs:
   binding-refs:
     runs-on: ubuntu-latest
+    env:
+      OPENJDK_BINDING_REPO_DEFAULT: mmtk/mmtk-openjdk
+      OPENJDK_BINDING_REF_DEFAULT: master
+      JIKESRVM_BINDING_REPO_DEFAULT: mmtk/mmtk-jikesrvm
+      JIKESRVM_BINDING_REF_DEFAULT: master
+      V8_BINDING_REPO_DEFAULT: mmtk/mmtk-v8
+      V8_BINDING_REF_DEFAULT: master
+      JULIA_BINDING_REPO_DEFAULT: mmtk/mmtk-julia
+      JULIA_BINDING_REF_DEFAULT: dev
+      RUBY_BINDING_REPO_DEFAULT: mmtk/mmtk-ruby
+      RUBY_BINDING_REF_DEFAULT: master
     outputs:
         openjdk_binding_repo: ${{ steps.print.outputs.openjdk_binding_repo }}
         openjdk_binding_ref: ${{ steps.print.outputs.openjdk_binding_ref }}
@@ -86,7 +97,7 @@ jobs:
           with:
             pull_request: ${{ inputs.pull_request }}
             token: ${{ secrets.GITHUB_TOKEN }}
-            default_env: 'OPENJDK_BINDING_REPO=mmtk/mmtk-openjdk,OPENJDK_BINDING_REF=master,JIKESRVM_BINDING_REPO=mmtk/mmtk-jikesrvm,JIKESRVM_BINDING_REF=master,V8_BINDING_REPO=mmtk/mmtk-v8,V8_BINDING_REF=master,JULIA_BINDING_REPO=mmtk/mmtk-julia,JULIA_BINDING_REF=master,RUBY_BINDING_REPO=mmtk/mmtk-ruby,RUBY_BINDING_REF=master'
+            default_env: 'OPENJDK_BINDING_REPO=${{ env.OPENJDK_BINDING_REPO_DEFAULT }},OPENJDK_BINDING_REF=${{ env.OPENJDK_BINDING_REF_DEFAULT }},JIKESRVM_BINDING_REPO=${{ env.JIKESRVM_BINDING_REPO_DEFAULT }},JIKESRVM_BINDING_REF=${{ env.JIKESRVM_BINDING_REF_DEFAULT }},V8_BINDING_REPO=${{ env.V8_BINDING_REPO_DEFAULT }},V8_BINDING_REF=${{ env.V8_BINDING_REF_DEFAULT }},JULIA_BINDING_REPO=${{ env.JULIA_BINDING_REPO_DEFAULT }},JULIA_BINDING_REF=${{ env.JULIA_BINDING_REF_DEFAULT }},RUBY_BINDING_REPO=${{ env.RUBY_BINDING_REPO_DEFAULT }},RUBY_BINDING_REF=${{ env.RUBY_BINDING_REF_DEFAULT }}'
         - id: print
           run: |
             echo "openjdk_binding_repo=${{ env.OPENJDK_BINDING_REPO }}" >> $GITHUB_OUTPUT