Initial import of Briefcase plugin

.github/workflows/ci.yaml

@@ -215,6 +215,9 @@ jobs:
             - name: Run ruff linter
               working-directory: api/python/slint
               run: uv tool run ruff check
+            - name: Run ruff linter
+              working-directory: api/python/briefcase
+              run: uv tool run ruff check
 
     cpp_test_driver:
         needs: files-changed

.github/workflows/upgrade_version.yaml

@@ -26,7 +26,7 @@ jobs:
                   sed -i 's/ VERSION [0-9]*\.[0-9]*\.[0-9]*)$/ VERSION ${{ github.event.inputs.new_version }})/' api/cpp/CMakeLists.txt
 
                   # The version is also in these files
-                  sed -i "s/^version = \"[0-9]*\.[0-9]*\.[0-9]*\(.*\)\"/version = \"${{ github.event.inputs.new_version }}\1\"/" api/cpp/docs/conf.py api/python/slint/pyproject.toml
+                  sed -i "s/^version = \"[0-9]*\.[0-9]*\.[0-9]*\(.*\)\"/version = \"${{ github.event.inputs.new_version }}\1\"/" api/cpp/docs/conf.py api/python/slint/pyproject.toml api/python/briefcase/pyproject.toml
 
                   # Version in package.json files
                   git ls-files | grep package.json | xargs sed -i 's/"version": ".*"/"version": "${{ github.event.inputs.new_version }}"/'

api/python/briefcase/README.md

@@ -0,0 +1,17 @@
+<!-- Copyright © SixtyFPS GmbH <info@slint.dev> ; SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0 -->
+
+# Briefcase Slint Plugin
+
+The `briefcasex-slint` package extends the [Briefcase](https://briefcase.readthedocs.io/en/stable/) tool
+with support for Slint as toolkit for standalone applications.
+
+Install it in your Python environment, and `briefcase new` will offer you Slint as GUI framework for your next application.
+
+## Get Started
+
+In a terminal, create a new Python environment and run the following commands:
+
+1. `pip install briefcasex-slint`
+2. `briefcase new -Q bootstrap=Slint`
+
+Following the instructions on the screen.

api/python/briefcase/pyproject.toml

@@ -0,0 +1,17 @@
+# Copyright © SixtyFPS GmbH <info@slint.dev>
+# SPDX-License-Identifier: MIT
+
+[project]
+name = "briefcasex-slint"
+version = "1.12.1b1"
+description = "Plugin for Briefcase to offer Slint application templates"
+readme = "README.md"
+requires-python = ">=3.10"
+dependencies = ["briefcase>=0.3.23"]
+
+[project.entry-points."briefcase.bootstraps"]
+Slint = "briefcasex_slint:SlintGuiBootstrap"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"

api/python/briefcase/src/briefcasex_slint/__init__.py

@@ -0,0 +1,100 @@
+# Copyright © SixtyFPS GmbH <info@slint.dev>
+# SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
+
+from pathlib import Path
+
+from briefcase.bootstraps.base import BaseGuiBootstrap
+
+
+class SlintGuiBootstrap(BaseGuiBootstrap):
+    display_name_annotation = "does not support Android/Web deployment"
+
+    def app_source(self):
+        return """\
+import slint
+
+class {{ cookiecutter.class_name }}(slint.loader.{{ cookiecutter.module_name }}.resources.app_window.AppWindow):
+    @slint.callback
+    def request_increase_value(self):
+        self.counter = self.counter + 1
+
+
+def main():
+    main_window = {{ cookiecutter.class_name }}()
+    main_window.show()
+    main_window.run()
+"""
+
+    def app_start_source(self):
+        return """\
+from {{ cookiecutter.module_name }}.app import main
+
+if __name__ == "__main__":
+    main()
+"""
+
+    def pyproject_table_briefcase_app_extra_content(self):
+        return """
+requires = [
+]
+test_requires = [
+{% if cookiecutter.test_framework == "pytest" %}
+    "pytest",
+{% endif %}
+]
+"""
+
+    def pyproject_table_macOS(self):
+        return """\
+universal_build = false
+requires = [
+    "slint",
+]
+"""
+
+    def pyproject_table_linux(self):
+        return """\
+requires = [
+    "slint",
+]
+"""
+
+    def pyproject_table_windows(self):
+        return """\
+requires = [
+    "slint",
+]
+"""
+
+    def pyproject_table_iOS(self):
+        return """\
+requires = [
+    "slint",
+]
+"""
+
+    def post_generate(self, base_path: Path) -> None:
+        target_dir = base_path / self.context["source_dir"] / "resources"
+        target_dir.mkdir(parents=True, exist_ok=True)
+        with open(target_dir / "app-window.slint", "w") as slint_file:
+            slint_file.write(r"""
+import { Button, VerticalBox, AboutSlint } from "std-widgets.slint";
+
+export component AppWindow inherits Window {
+    in-out property<int> counter: 42;
+    callback request-increase-value();
+    VerticalBox {
+        alignment: center;
+        AboutSlint {}
+        Text {
+            text: "Counter: \{root.counter}";
+        }
+        Button {
+            text: "Increase value";
+            clicked => {
+                root.request-increase-value();
+            }
+        }
+     }
+}
+""")