move shared actions

.github/actions/initbuild/action.yml

@@ -0,0 +1,34 @@
+runs:
+  using: "composite"
+  steps:
+    - name: Setup Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.x
+
+    - name: Cache python libs
+      uses: actions/cache@v1
+      id: cache-pip # needed in if test
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip
+
+    - name: Upgrade python tools
+      # We actually want to run this every time
+      # if: steps.cache-pip.outputs.cache-hit != 'true'
+      run: |
+        python -m pip install --upgrade pip
+        pip install -U platformio meshtastic adafruit-nrfutil
+
+    - name: Cache platformio
+      uses: actions/cache@v1
+      id: cache-platformio # needed in if test
+      with:
+        path: ~/.platformio
+        key: ${{ runner.os }}-platformio
+
+    - name: Upgrade platformio
+      run: |
+        pio upgrade
+
+