Rework workflow to minimize intermediate files.

Author: freakboy3742

.github/workflows/release.yaml

@@ -8,14 +8,9 @@ on:
     - '*-b*'
 
 jobs:
-  build:
-    runs-on: macOS-latest
-    strategy:
-      max-parallel: 4
-      matrix:
-        target: ['macOS', 'iOS', 'tvOS', 'watchOS']
+  make-release:
+    runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
     - name: Set build variables
       env:
         TAG_NAME: ${{ github.ref }}
@@ -29,20 +24,34 @@ jobs:
         echo "::set-env name=TAG::${TAG}"
         echo "::set-env name=PY_VERSION::${TAG_VERSION}"
         echo "::set-env name=BUILD_NUMBER::${TAG_BUILD}"
-    - name: Build project
+    - name: Create Release
+      id: create_release
+      uses: actions/create-release@v1
       env:
-        BUILD_NUMBER: ${{ env.BUILD_NUMBER }}
-      run: make -e ${{ matrix.target }}
-    - name: Upload build artefact
-      uses: actions/upload-artifact@v1
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
-        name: ${{ matrix.target }}
-        path: ./dist/Python-${{ env.PY_VERSION }}-${{ matrix.target }}-support.${{ env.BUILD_NUMBER }}.tar.gz
+        tag_name: ${{ github.ref }}
+        release_name: ${{ github.ref }}
+        draft: true
+        prerelease: false
+        body: |
+          Build ${{ env.BUILD_NUMBER }} of the BeeWare support package for Python ${{ env.PY_VERSION }}.
 
-  release:
-    runs-on: ubuntu-latest
-    needs: build
+          Includes:
+          * Python ${{ env.PY_VERSION }}.?
+          * ...
+    outputs:
+      upload_url: ${{ steps.create_release.outputs.upload_url }}
+
+  build:
+    runs-on: macOS-latest
+    needs: make-release
+    strategy:
+      max-parallel: 4
+      matrix:
+        target: ['macOS', 'iOS', 'tvOS', 'watchOS']
     steps:
+    - uses: actions/checkout@v2
     - name: Set build variables
       env:
         TAG_NAME: ${{ github.ref }}
@@ -56,53 +65,28 @@ jobs:
         echo "::set-env name=TAG::${TAG}"
         echo "::set-env name=PY_VERSION::${TAG_VERSION}"
         echo "::set-env name=BUILD_NUMBER::${TAG_BUILD}"
-    - name: Download build artefacts
-      uses: actions/download-artifact@v2
-    - name: Display structure of downloaded files
-      run: ls -R
-    - name: Create Release
-      id: create_release
-      uses: actions/create-release@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        tag_name: ${{ github.ref }}
-        release_name: ${{ github.ref }}
-        draft: true
-        prerelease: false
-    - name: Upload macOS Release Asset to Github
-      uses: actions/upload-release-asset@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: ./macOS/Python-${{ env.PY_VERSION }}-macOS-support.${{ env.BUILD_NUMBER }}.tar.gz
-        asset_name: Python-${{ env.PY_VERSION }}-macOS-support.${{ env.BUILD_NUMBER }}.tar.gz
-        asset_content_type: application/gzip
-    - name: Upload iOS Release Asset to Github
-      uses: actions/upload-release-asset@v1
+    - name: Build ${{ matrix.target }}
       env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: ./iOS/Python-${{ env.PY_VERSION }}-iOS-support.${{ env.BUILD_NUMBER }}.tar.gz
-        asset_name: Python-${{ env.PY_VERSION }}-iOS-support.${{ env.BUILD_NUMBER }}.tar.gz
-        asset_content_type: application/gzip
-    - name: Upload tvOS Release Asset to Github
-      uses: actions/upload-release-asset@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: ./tvOS/Python-${{ env.PY_VERSION }}-tvOS-support.${{ env.BUILD_NUMBER }}.tar.gz
-        asset_name: Python-${{ env.PY_VERSION }}-tvOS-support.${{ env.BUILD_NUMBER }}.tar.gz
-        asset_content_type: application/gzip
-    - name: Upload watchOS Release Asset to Github
+        BUILD_NUMBER: ${{ env.BUILD_NUMBER }}
+      run: |
+        # 2020-05-29: The iOS 13.4 SDK changed the implementation of FD_SET
+        # to use a weak linked symbol (__darwin_check_fd_set_overflow).
+        # This means any support package built against that SDK is incompatible
+        # with linking against an earlier SDK.
+        # However, you can't get the iOS 13.4 SDK on macOS Mojave (10.14),
+        # because the latest XCode supported on Mojave (11.3.1) only provided
+        # SDK 13.2.
+        # So: We force the use of XCode 11.3.1, which ships with the 13.2 SDK.
+        # For a list of SDKs available on Github Actions, see:
+        # https://github.com/actions/virtual-environments/blob/master/images/macos/macos-10.15-Readme.md
+        sudo xcode-select --switch /Applications/Xcode_11.3.1.app
+        make -e ${{ matrix.target }}
+    - name: Upload ${{ matrix.target }} release asset
       uses: actions/upload-release-asset@v1
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: ./watchOS/Python-${{ env.PY_VERSION }}-watchOS-support.${{ env.BUILD_NUMBER }}.tar.gz
-        asset_name: Python-${{ env.PY_VERSION }}-watchOS-support.${{ env.BUILD_NUMBER }}.tar.gz
+        upload_url: ${{ needs.make-release.outputs.upload_url }}
+        asset_path: ./dist/Python-${{ env.PY_VERSION }}-${{ matrix.target }}-support.${{ env.BUILD_NUMBER }}.tar.gz
+        asset_name: Python-${{ env.PY_VERSION }}-${{ matrix.target }}-support.${{ env.BUILD_NUMBER }}.tar.gz
         asset_content_type: application/gzip