damn, so AppImage execution is failing to run in GitHub's shared runner with fuse errors. This is most likely because fuse requires a kernel module to be loaded, and for that to work in a Docker container, then the docker host must have that module loaded.

  2020-05-31T21:33:35.5478138Z + chmod +x /tmp/appimagetool.AppImage
  2020-05-31T21:33:35.5487678Z + mkdir dist
  2020-05-31T21:33:35.5517125Z + /tmp/appimagetool.AppImage /tmp/kivy_appdir dist/helloWorld.AppImage
  2020-05-31T21:33:35.5522850Z fuse: device not found, try 'modprobe fuse' first
  2020-05-31T21:33:35.7058092Z open dir error: No such file or directory
  2020-05-31T21:33:35.7058725Z + uname -a

The question is: am I running a container in a container? Because if the ubuntu docker host is actually a VM with debain running inside it as a container, then maybe I can load the fuse module on the docker host before going into the container? Let's try it.

fwiw, this is not necessary on gitlab's shared runners. I also found this indicating that github had no desire to add modules totheir shared runners :\

 * https://github.community/t/custom-linux-kernel-module/17194

And I learned that apparently the GitHub MacOS shared runners support nested virtualization and have vagrant & virtualbox installed by default. Intersting..

 * actions/runner-images#183
 * actions/runner-images#433 (comment)

Author: maltfield

.github/workflows/build.yml

@@ -11,19 +11,29 @@ jobs:
 
   linux:
     runs-on: ubuntu-latest
-    container: debian:buster-slim
-
+#    container: debian:buster-slim
+#
     steps:
     - uses: actions/checkout@v2
-
     - name: Execute script to build linux AppImage
-      run: "build/linux/buildAppImage.sh"
+      run: |
+        sudo apt-get install fuse
+        sudo lsmod
+        sudo modprobe fuse
+        sudo lsmod
+        wget -O /tmp/python3.7.AppImage https://github.com/niess/python-appimage/releases/download/python3.7/python3.7.7-cp37-cp37m-manylinux2014_x86_64.AppImage
+        chmod +x /tmp/python3.7.AppImage
+        /tmp/python3.7.AppImage -c 'print("hello")'
       shell: bash
-
-    - uses: actions/upload-artifact@v2
-      with:
-        name: Linux AppImage (x86_64)
-        path: dist/
+#
+#    - name: Execute script to build linux AppImage
+#      run: "build/linux/buildAppImage.sh"
+#      shell: bash
+#
+#    - uses: actions/upload-artifact@v2
+#      with:
+#        name: Linux AppImage (x86_64)
+#        path: dist/
 
   windows:
     runs-on: windows-latest