Trying caching

.github/workflows/c-cpp.yml

@@ -8,6 +8,8 @@ on:
 
 jobs:
   build:
+    env:
+      GCC_VERSION: '9-2019-q4'
 
     runs-on: ubuntu-latest
 
@@ -18,10 +20,27 @@ jobs:
     - uses: actions/setup-node@v2-beta
       with:
           node-version: 'v12'
-    - uses: fiam/arm-none-eabi-gcc@v1
+
+    - name: Restore ARM GCC Cache
+      id: arm-gcc-cache
+      uses: actions/cache@v2
       with:
-        release: '9-2019-q4'
+        path: arm-gcc
+        key:  ${{ runner.os }}-arm-gcc-${{ env.GCC_VERSION }}
+    - name: Install ARM GCC
+      if: steps.arm-gcc-cache.outputs.cache-hit != 'true'
+      uses: fiam/arm-none-eabi-gcc@v1
+      with:
+        release: ${{ env.GCC_VERSION }}
+        directory: arm-gcc
+    - name: Save ARM GCC cache
+      if: steps.arm-gcc-cache.outputs.cache-hit != 'true'
+      uses: actions/cache@v2
+      with:
+        path: arm-gcc
+        key:  ${{ runner.os }}-arm-gcc-${{ env.GCC_VERSION }}
+    - name: set PATH
+      run: echo "::add-path::arm-gcc"
+
     - name: make
       run: make TARGET=jm-v2.0 drop
-
-