Add code to tag, build and publish stub binaries.

.github/workflows/update-binary.yml

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+name: Update binary
+on:
+  push:
+    tags:
+    - '*-b*'
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build-stubs:
+    name: Build stub binaries
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        python-version: [ "3.8", "3.9", "3.10", "3.11", "3.12" ]
+    steps:
+    - name: Set Build Variables
+      env:
+        TAG_NAME: ${{ github.ref }}
+      run: |
+        export TAG=$(basename $TAG_NAME)
+        export PYTHON_TAG=$(python -c "print('.'.join('${{ matrix.python-version }}'.split('.')[:2]))")
+        export BRIEFCASE_VERSION="${TAG%-*}"
+        export BUILD_NUMBER="${TAG#*-}"
+
+        echo "TAG=${TAG}" | tee -a $GITHUB_ENV
+        echo "PYTHON_TAG=${PYTHON_TAG}" | tee -a $GITHUB_ENV
+        echo "BRIEFCASE_VERSION=${BRIEFCASE_VERSION}" | tee -a $GITHUB_ENV
+        echo "BUILD_NUMBER=${BUILD_NUMBER}" | tee -a $GITHUB_ENV
+
+    - name: Checkout Template
+      uses: actions/[email protected]
+
+    - name: Setup Python ${{ matrix.python-version }}
+      uses: actions/[email protected]
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install Dependencies
+      run: |
+        python -m pip install --upgrade pip
+        if [ "${{ env.BRIEFCASE_VERSION }}" == "dev" ]; then
+          # We're on the development template; use development Briefcase
+          python -m pip install git+https://github.com/beeware/briefcase.git
+        else
+          python -m pip install briefcase==${{ env.BRIEFCASE_VERSION }}
+        fi
+
+    - name: Generate VisualStudio Stub App
+      run: |
+        # Generate the stub app
+        cd stub
+        briefcase build windows visualstudio
+
+        echo "Build console stub artefact"
+        mv "./build/console-stub/windows/visualstudio/x64/Release/Console Stub.exe" ./Stub.exe
+        zip Console-Stub-${{ env.PYTHON_TAG }}-${{ steps.build-vars.outputs.BUILD_NUMBER }}.zip Stub.exe
+
+        echo "Build GUI stub artefact"
+        mv "./build/gui-stub/windows/visualstudio/x64/Release/GUI Stub.exe" ./Stub.exe
+        zip GUI-Stub-${{ env.PYTHON_TAG }}-${{ steps.build-vars.outputs.BUILD_NUMBER }}.zip Stub.exe
+
+    - name: Upload Release Asset to S3
+      env:
+        AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+        AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      run: |
+        python -m pip install -U pip
+        python -m pip install -U setuptools
+        python -m pip install awscli
+
+        aws s3 cp stub/Console-Stub-${{ env.PYTHON_TAG }}-${{ steps.build-vars.outputs.BUILD_NUMBER }}.zip s3://briefcase-support/python/${{ steps.build-vars.  outputs.PY_VERSION }}/windows/Console-Stub-${{ env.PYTHON_TAG }}-${{ steps.build-vars.outputs.BUILD_NUMBER }}.zip
+        aws s3 cp stub/GUI-Stub-${{ env.PYTHON_TAG }}-${{ steps.build-vars.outputs.BUILD_NUMBER }}.zip s3://briefcase-support/python/${{ steps.build-vars.outputs.PY_VERSION }}/windows/GUI-Stub-${{ env.PYTHON_TAG }}-${{ steps.build-vars.outputs.BUILD_NUMBER }}.zip

stub/pyproject.toml

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+[tool.briefcase]
+project_name = "Stub"
+bundle = "org.beeware"
+version = "1.0.0"
+license.file = "../LICENSE"
+
+# Use the current state of this repo as the template.
+template = ".."
+
+[tool.briefcase.app.gui-stub]
+formal_name = "GUI Stub"
+description = "A stub binary for GUI apps that can be integrated into the Windows app template"
+sources = ['src/gui_stub']
+
+[tool.briefcase.app.console-stub]
+formal_name = "Console Stub"
+description = "A stub binary for console apps that can be integrated into the Windows app template"
+sources = ['src/console_stub']
+console_app = true