build using Py3.8 and test across more OSs (#506)

* build using Py3.8 and test across more OSs

* enable for release

* test builds on push to master

.github/workflows/build.yml

@@ -1,6 +1,8 @@
 name: build
 
 on:
+  push:
+    branches: [master]
   release:
     types: [edited, published]
 
@@ -26,10 +28,11 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: true
-      - name: Set up Python 3.9
+      # using Python 3.8 to support running across multiple operating systems including Windows 7
+      - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: 3.8
       - if: matrix.os == 'ubuntu-16.04'
         run: sudo apt-get install -y libyaml-dev
       - name: Install PyInstaller
@@ -45,10 +48,42 @@ jobs:
           name: ${{ matrix.asset_name }}
           path: dist/${{ matrix.artifact_name }}
 
-  zip:
-    name: zip ${{ matrix.asset_name }}
+  test_run:
+    # test that binaries run on push to master
+    if: github.event_name == 'push'
+    name: Test run on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    needs: [build]
+    strategy:
+      matrix:
+        include:
+          # OSs not already tested above
+          - os: ubuntu-18.04
+            artifact_name: capa
+            asset_name: linux
+          - os: ubuntu-20.04
+            artifact_name: capa
+            asset_name: linux
+          - os: windows-2016
+            artifact_name: capa.exe
+            asset_name: windows
+    steps:
+      - name: Download ${{ matrix.asset_name }}
+        uses: actions/download-artifact@v2
+        with:
+          name: ${{ matrix.asset_name }}
+      - name: Set executable flag
+        if: matrix.os != 'windows-2016'
+        run: chmod +x ${{ matrix.artifact_name }}
+      - name: Run capa
+        run: ./${{ matrix.artifact_name }} -h
+
+  zip_and_upload:
+    # upload zipped binaries to Release page
+    if: github.event_name == 'release'
+    name: zip and upload ${{ matrix.asset_name }}
     runs-on: ubuntu-20.04
-    needs: build
+    needs: [build]
     strategy:
       matrix:
         include: