update CI so it can also optionally push ot a new branch

.github/workflows/build.yml

@@ -16,6 +16,10 @@ on:
         # We use 3.1.51 because later versions give compiler errors
         # (possibly related to https://github.com/emscripten-core/emscripten/issues/21128)
         default: '3.1.51'
+      make-branch:
+        type: boolean
+        default: false
+
   pull_request:
 
 jobs:
@@ -26,27 +30,29 @@ jobs:
       mfem-ref: ${{ github.event_name == 'pull_request' && 'master' || inputs.mfem-ref }}
       glvis-ref: ${{ github.event_name == 'pull_request' && 'master' || inputs.glvis-ref }}
       emscripten-version: ${{ github.event_name == 'pull_request' && '3.1.51' || inputs.emscripten-version }}
+      make-branch: ${{ github.event_name == 'workflow_dispatch' && inputs.make-branch }}
 
     name: >-
         build glvis-js |
-        mfem=${{ github.event_name == 'pull_request' && 'master' || inputs.mfem-ref }} | 
-        glvis=${{ github.event_name == 'pull_request' && 'master' || inputs.glvis-ref }} | 
+        mfem=${{ github.event_name == 'pull_request' && 'master' || inputs.mfem-ref }} |
+        glvis=${{ github.event_name == 'pull_request' && 'master' || inputs.glvis-ref }} |
         emcc=${{ github.event_name == 'pull_request' && '3.1.51' || inputs.emscripten-version }}
 
     steps:
     # ---------------------------------------------------------------------------------
     # Install glvis-js and dependencies
     # ---------------------------------------------------------------------------------
+    - name: Install glvis dependencies
+      run: |
+        sudo apt-get install libfontconfig1-dev libfreetype-dev libsdl2-dev \
+        libglew-dev libglm-dev libpng-dev git-lfs
+
     - name: Checkout glvis-js
       uses: actions/checkout@v4
       with:
         submodules: recursive
         path: glvis-js
-
-    - name: Install glvis dependencies
-      run: |
-        sudo apt-get install libfontconfig1-dev libfreetype-dev libsdl2-dev \
-        libglew-dev libglm-dev libpng-dev
+        lfs: true
 
     - name: Checkout emscripten
       uses: actions/checkout@v4
@@ -77,15 +83,15 @@ jobs:
         path: glvis
 
     - name: Install glvis-js (also installs mfem + glvis)
-      run: | 
+      run: |
         cd glvis-js
         make install -j 4
 
     # ---------------------------------------------------------------------------------
     # Generate an artifact
     # ---------------------------------------------------------------------------------
     - name: Print artifact info
-      run: | 
+      run: |
         cat glvis-js/src/versions.js
         sha256sum glvis-js/src/*
 
@@ -95,3 +101,14 @@ jobs:
           name: glvis-js
           path: glvis-js/src
           retention-days: 1
+
+    - name: Push changes to a new branch
+      if: env.make-branch
+      run: |
+        cd glvis-js
+        git config user.name "github-actions[bot]"
+        git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+        git switch -c "ci-build-${{ github.run_id }}"
+        git add .
+        git commit -m "Updating glvis-js build"
+        git push