ci: Generic matrix build for cross-compile targets

Moved cross-compile configuration into matrix build configuration.
Targets can be added with additional matrix configuration entries.
The rest of the build is now generic.

This allows to use the new Buildroot SDK in YIO-Remote/remote-os#3

.github/workflows/build.yml

@@ -11,7 +11,6 @@
 
   env:
     APP_NAME: YIO-remote-software
-    APP_ARCHITECTURE: RPi0
     PROJECT_NAME: remote-software
     HASH_FILENAME: yio-remote-software.hash
 
@@ -23,46 +22,61 @@
         matrix:
           config:
           - {
-              name: "RPi0 Release Build", artifact: "RPi0-release",
-              qmake-args: "CONFIG+=release"
+              name: "remote-os v0.x Build", artifact: "RPi0-release",
+              qmake-args: "CONFIG+=release",
+              build-image: "zehnm/yio-crosscompile-action:1.1.0"
             }
-
+          - {
+              name: "remote-os v1.x Build", artifact: "RPi0-Qt5.12.8",
+              qmake-args: "CONFIG+=release",
+              build-image: "zehnm/yio-crosscompile-action:2.0.0"
+            }
+
       steps:
-        - name: github env vars
-          run: |
-            echo "$GITHUB_REF"
-            echo "$GITHUB_HEAD_REF"
-            echo "$GITHUB_BASE_REF"
-  
         - name: Checkout ${{ env.PROJECT_NAME}}
           uses: actions/checkout@v2
           with:
             # History of 500 should be more than enough to calculate commit count since last release tag.
             fetch-depth: 500
+            # Check out into sub folder, we also need the integrations.library at the same level!
             path: ${{ env.PROJECT_NAME}}
 
         - name: Fetch all tags to determine version
+          # Used in cross compile step
           run: |
             cd ${{ env.PROJECT_NAME}}
             git fetch origin +refs/tags/*:refs/tags/*
             git describe --match "v[0-9]*" --tags HEAD --always
   
-        - name: Set build timestamp
-          run: echo "::set-env name=TIMESTAMP::$(date +"%Y%m%d_%H%M%S")"
-
+        # Unfortunately we can't use a dynamic Action as in "uses: ${{ matrix.config.build-image }}" 
+        # - name: Cross compile
+        #   id: cross-compile
+        #   uses: zehnm/[email protected]
+        #   with:
+        #     project-name: ${{ env.PROJECT_NAME }}
+        #     output-path: ${GITHUB_WORKSPACE}/binaries/app
+        #     qmake-args: ${{ matrix.config.qmake-args }}
+        #
+        # So let's do it manually :-( Maybe one day we'll get that feature from GitHub...
         - name: Cross compile
-          id: cross-compile
-          uses: zehnm/[email protected]
-          with:
-            project-name: ${{ env.PROJECT_NAME }}
-            output-path: ${GITHUB_WORKSPACE}/binaries/app
-            qmake-args: ${{ matrix.config.qmake-args }}
-
+          run: |
+              docker pull ${{ matrix.config.build-image }}
+              docker run --workdir /github/workspace --rm  \
+                  -e GITHUB_WORKSPACE=/github/workspace \
+                  -v /home/runner/work/${{ env.PROJECT_NAME}}/${{ env.PROJECT_NAME}}:/github/workspace \
+                  ${{ matrix.config.build-image }} ${{ env.PROJECT_NAME}} /github/workspace/binaries/app ${{ matrix.config.qmake-args }} https://github.com/YIO-Remote/integrations.library.git .
+
+        - name: Get artifact version
+          run: |
+            read -r APP_VERSION < binaries/version.txt
+            echo "::set-env name=APP_VERSION::$APP_VERSION"
+
         - name: Upload build artefacts
-          uses: actions/upload-artifact@v1
+          uses: actions/upload-artifact@v2
           with:
             path: binaries
-            name: ${{ env.APP_NAME }}-${{ matrix.config.artifact }}
+            name: ${{ env.APP_NAME }}-v${{ env.APP_VERSION }}-${{ matrix.config.artifact }}
+            if-no-files-found: error
 
     release:
       name: Create Release
@@ -71,49 +85,47 @@
       needs: build
 
       steps:
-        - run: mkdir release
-        - name: Download release artifact
-          uses: actions/download-artifact@v1
-          with:
-            name: ${{ env.APP_NAME }}-${{ env.APP_ARCHITECTURE }}-release
-            path: ./release
+        - name: Download build artifacts
+          uses: actions/download-artifact@v2
 
-        - name: Get artifact version
+        - name: Display structure of downloaded files
+          run: ls -R
+
+        - name: Get timestamp
           run: |
-            read -r APP_VERSION < release/version.txt
-            echo "::set-env name=APP_VERSION::$APP_VERSION"
             echo "::set-env name=TIMESTAMP::$(date +"%Y%m%d_%H%M%S")"
-
+  
         - name: Create GitHub development build archives
           if: "!contains(github.ref, 'tags/v')"
           run: |
-            tar cvf ${{ env.APP_NAME }}-v${{ env.APP_VERSION }}-${{ env.TIMESTAMP }}-${{ env.APP_ARCHITECTURE }}-release.tar -C release .
+            for D in *; do if [ -d "${D}" ]; then tar cvf $D-${{ env.TIMESTAMP }}.tar -C $D .; fi; done;
             for filename in *.tar; do echo "sha256  `sha256sum $filename`" >> ${{ env.HASH_FILENAME }}; done;
 
-        - name: Create Pre-Release ${{ env.APP_VERSION }}
+        - name: Create Pre-Release
           uses: "marvinpinto/action-automatic-releases@latest"
           if: "!contains(github.ref, 'tags/v')"
           with:
             repo_token: "${{ secrets.GITHUB_TOKEN }}"
             automatic_release_tag: "latest"
             prerelease: true
-            title: "Development Build ${{ env.APP_VERSION }}"
+            title: "Development Build"
             files: |
                 *.tar
                 ${{ env.HASH_FILENAME }}
 
         - name: Create GitHub release archives
           if: "contains(github.ref, 'tags/v')"
           run: |
-            tar cvf ${{ env.APP_NAME }}-v${{ env.APP_VERSION }}-${{ env.APP_ARCHITECTURE }}-release.tar -C release .
+            for D in *; do if [ -d "${D}" ]; then tar cvf $D.tar -C $D .; fi; done;
             for filename in *.tar; do echo "sha256  `sha256sum $filename`" >> ${{ env.HASH_FILENAME }}; done;
 
-        - name: Create Release ${{ env.APP_VERSION }}
+        - name: Create Release
           uses: "marvinpinto/action-automatic-releases@latest"
           if: "contains(github.ref, 'tags/v')"
           with:
             repo_token: "${{ secrets.GITHUB_TOKEN }}"
             prerelease: false
             files: |
-                *.tar
-                ${{ env.HASH_FILENAME }}
+              *.tar
+              ${{ env.HASH_FILENAME }}
+