CI: move image building to GitHub actions (#335)

* Start working on building image in GitHub actions

* Trigger GitHub on push to any branch

* Fix TRAVIS_TAG

* Add compress image step

* Disable image build in Travis

* Add upload image step

* Fix compress image

* Fix

* Fix

* Minor fix

* Trigger build on tag

* Show images sizes not in human format

* Upload only built image

* Make prerelease

* Upload assets on release not on tags

.github/workflows/main.yml

@@ -6,15 +6,36 @@ name: CI
 on:
   # Triggers the workflow on push or pull request events but only for the master branch
   push:
-    branches: [ master ]
+    branches: [ '*' ]
   pull_request:
     branches: [ master ]
+  release:
+    types: [ created ]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
+  build-image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build image
+        run: |
+          docker run --privileged --rm -v /dev:/dev -v $(pwd):/builder/repo -e TRAVIS_TAG="${{ github.event.release.tag_name }}" sfalexrog/img-tool:qemu-update
+      - name: Compress image
+        run: |
+          sudo chmod -R 777 images && zip -9 $(echo images/clover_*).zip images/clover_* && ls -l images
+      - name: Upload image
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/v')
+        with:
+          files: images/clover_*.zip
+          prerelease: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
   # This workflow contains a single job called "build"
   build:
     # The type of runner that the job will run on