Only run Ubuntu arm Emscripten job in PRs (#895)

Author: mcbarton

.github/workflows/emscripten.yml

@@ -28,7 +28,8 @@ jobs:
             llvm_targets_to_build: "WebAssembly"
             emsdk_ver: "4.0.9"
             build_static_library: On
-            micromamba_shell_init: bash  
+            micromamba_shell_init: bash
+            run-in-prs: true
           - name: osx26-arm-clang-repl-21-emscripten
             os: macos-26
             clang-runtime: '21'
@@ -56,16 +57,20 @@ jobs:
 
     steps:
     - uses: actions/checkout@v6
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
 
     - name: Set up Python
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       uses: actions/setup-python@v6
       with:
         python-version: '3.11'
 
     - name: Save PR Info
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       uses: ./.github/actions/Miscellaneous/Save_PR_Info
 
     - name: Restore cached LLVM-${{ matrix.clang-runtime }} and ${{ matrix.cling == 'On' && 'Cling' || 'Clang-REPL' }} build (Unix like systems emscripten)
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       uses: actions/cache/restore@v4
       id: cache
       with:
@@ -75,23 +80,25 @@ jobs:
         key: ${{ env.CLING_HASH }}-${{ runner.os }}-${{ matrix.os }}-clang-${{ matrix.clang-runtime }}.x-emscripten
 
     - name: Setup emsdk
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       run: |
           git clone --depth=1 https://github.com/emscripten-core/emsdk.git
           cd emsdk
           ./emsdk install  ${{ matrix.emsdk_ver }}
 
     - name: Setup default Build Type
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       uses: ./.github/actions/Miscellaneous/Select_Default_Build_Type
 
     - name: Install deps on Windows
-      if: ${{ runner.os == 'windows' && steps.cache.outputs.cache-hit != 'true' }}
+      if: ${{ runner.os == 'windows' && steps.cache.outputs.cache-hit != 'true' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       run: |
         choco install findutils ninja
         $env:PATH="C:\Program Files (x86)\GnuWin32\bin;$env:PATH"
         $env:PATH="C:\Program Files (x86)\Ninja\bin;$env:PATH"
 
     - name: Install deps on MacOS
-      if: ${{ runner.os == 'macOS' && steps.cache.outputs.cache-hit != 'true' }}
+      if: ${{ runner.os == 'macOS' && steps.cache.outputs.cache-hit != 'true' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       run: |
         brew update
         export ARCHITECHURE=$(uname -m)
@@ -106,7 +113,7 @@ jobs:
         brew install ninja
 
     - name: Install deps on Linux
-      if: ${{ runner.os == 'Linux' && steps.cache.outputs.cache-hit != 'true' }}
+      if: ${{ runner.os == 'Linux' && steps.cache.outputs.cache-hit != 'true' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       run: |
         # Install deps
         sudo apt-get update
@@ -115,7 +122,7 @@ jobs:
         sudo apt-get clean
 
     - name: Build LLVM/Cling on Unix systems if the cache is invalid (emscripten)
-      if: ${{ runner.os != 'windows' && steps.cache.outputs.cache-hit != 'true' }}
+      if: ${{ runner.os != 'windows' && steps.cache.outputs.cache-hit != 'true' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       run: |
         ./emsdk/emsdk activate ${{matrix.emsdk_ver}}
         source ./emsdk/emsdk_env.sh
@@ -220,7 +227,7 @@ jobs:
 
 
     - name: Build LLVM/Cling on Windows systems if the cache is invalid (emscripten)
-      if: ${{ runner.os == 'windows' && steps.cache.outputs.cache-hit != 'true' }}
+      if: ${{ runner.os == 'windows' && steps.cache.outputs.cache-hit != 'true' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true)}}
       run: |
         .\emsdk\emsdk activate ${{matrix.emsdk_ver}}
         .\emsdk\emsdk_env.ps1
@@ -355,31 +362,33 @@ jobs:
         }
 
     - name: Cache LLVM-${{ matrix.clang-runtime }} and ${{ matrix.cling == 'On' && 'Cling' || 'Clang-REPL' }} build
+      if: ${{ steps.cache.outputs.cache-hit != 'true' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       uses: actions/cache/save@v4
-      if: ${{ steps.cache.outputs.cache-hit != 'true' }}
       with:
         path: |
           llvm-project
           ${{ matrix.cling=='On' && 'cling' || '' }}
         key: ${{ steps.cache.outputs.cache-primary-key }}
 
     - name: install mamba
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       uses: mamba-org/setup-micromamba@main
       with:
         init-shell: >-
           ${{ matrix.micromamba_shell_init }}
 
     - name: micromamba shell hook
-      if: runner.os == 'Windows'
+      if: ${{ runner.os == 'Windows' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       shell: powershell
       run: |
         micromamba shell hook -s cmd.exe --root-prefix C:\Users\runneradmin\micromamba-root
 
     - name: Build and test CppInterOp
+      if: ${{ !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       uses: ./.github/actions/Build_and_Test_CppInterOp
 
     - name: Build xeus-cpp on Unix Systems
-      if: ${{ runner.os != 'windows' }}
+      if: ${{ runner.os != 'windows' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       shell: bash -l {0}
       run: |
         ./emsdk/emsdk activate ${{matrix.emsdk_ver}}
@@ -403,7 +412,7 @@ jobs:
         emmake make -j ${{ env.ncpus }} install
 
     - name: Build xeus-cpp on Windows systems
-      if: ${{ runner.os == 'windows' }}
+      if: ${{ runner.os == 'windows' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       shell: powershell
       run: |
         .\emsdk\emsdk activate ${{matrix.emsdk_ver}}
@@ -427,7 +436,7 @@ jobs:
         emmake make -j ${{ env.ncpus }} install
 
     - name: Test xeus-cpp C++ Emscripten on Unix Systems
-      if: ${{ runner.os != 'windows' }}
+      if: ${{ runner.os != 'windows' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       shell: bash -l {0}
       run: |
         set -e
@@ -436,7 +445,7 @@ jobs:
         node test_xeus_cpp.js
 
     - name: Test xeus-cpp C++ Emscripten on Windows Systems
-      if: ${{ runner.os == 'windows' }}
+      if: ${{ runner.os == 'windows' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       shell: powershell
       run: |
         function Error-OnFailure {
@@ -460,7 +469,7 @@ jobs:
         Error-OnFailure { emrun.bat --browser="chrome.exe" --kill_exit --timeout 60 --browser-args="--headless --no-sandbox"  test_xeus_cpp.html }
 
     - name: Jupyter Lite integration
-      if: ${{ runner.os != 'windows' }}
+      if: ${{ runner.os != 'windows' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true) }}
       shell: bash -l {0}
       run: |
           cd ./xeus-cpp/
@@ -469,7 +478,7 @@ jobs:
           jupyter lite build --XeusAddon.prefix=${{ env.PREFIX }} --contents notebooks/xeus-cpp-lite-demo.ipynb --contents notebooks/tinyraytracer.ipynb --contents notebooks/images/marie.png --contents notebooks/audio/audio.wav --output-dir dist
 
     - name: Jupyter Lite integration
-      if: ${{ runner.os == 'windows' }}
+      if: ${{ runner.os == 'windows' && !(github.event_name == 'pull_request' && matrix.run-in-prs != true)}}
       shell: powershell
       run: |
           cd .\xeus-cpp\