Blender 5.1.2 (#1)

Refactoring to works with the new blender depot config

Reviewed-on: #1
Co-authored-by: stilobique <contact@aurelien-vaillant.net>

blender/dependency.py

@@ -0,0 +1,78 @@
+import os
+import requests
+import tempfile
+import importlib.util
+
+from blender.version import BlenderVersion
+
+# "Wayland Protocols" has no "Library" in its name but is still a
+# build-critical dependency, so it's matched by name too.
+_EXTRA_PACKAGE_NAMES = {'wayland protocols'}
+
+
+class BlenderDependency:
+    def __init__(self, blender: BlenderVersion):
+        self._blender_version = blender
+        self._url = rf'https://projects.blender.org/blender/blender/raw/tag/v{self._blender_version.tag_name()}/build_files/build_environment/install_linux_packages.py'
+        self.module = self._get_source_file()
+
+        self.packages = list()
+        self._get_list()
+
+        self.packages_complete = list()
+        self._get_complete_list()
+
+    def _get_source_file(self):
+        """Download the Blender dependency script and import it at runtime."""
+        r = requests.get(self._url)
+
+        with tempfile.NamedTemporaryFile(mode='wb', suffix='.py', delete=False) as t:
+            t.write(r.content)
+            path = t.name
+
+        try:
+            spec = importlib.util.spec_from_file_location('install_linux_packages', path)
+            module = importlib.util.module_from_spec(spec)
+            spec.loader.exec_module(module)
+            return module
+        finally:
+            os.remove(path)
+
+    def _get_list(self):
+        """Keep the mandatory 'library' packages (and Wayland Protocols) as Debian/Ubuntu apt names."""
+        sources = self.module.BUILD_MANDATORY_SUBPACKAGES + self.module.DEPS_CRITICAL_SUBPACKAGES
+        for package in self._flatten(sources):
+            if 'library' not in package.name.lower() and package.name.lower() not in _EXTRA_PACKAGE_NAMES:
+                continue
+            name = package.distro_package_names.get(self.module.DISTRO_ID_DEBIAN)
+            if isinstance(name, str):
+                self.packages.append(name)
+
+    def _get_complete_list(self):
+        """All packages required to build Blender (PACKAGES_BASICS_BUILD) as Debian/Ubuntu apt names."""
+        for package in self._flatten(self.module.PACKAGES_BASICS_BUILD):
+            name = package.distro_package_names.get(self.module.DISTRO_ID_DEBIAN)
+            if isinstance(name, str):
+                self.packages_complete.append(name)
+
+    def _flatten(self, packages):
+        """Yield every leaf Package, descending into is_group sub_packages."""
+        for package in packages:
+            if package.is_group:
+                yield from self._flatten(package.sub_packages)
+            else:
+                yield package
+                
+    def __str__(self):
+        return ' '.join(self.packages)
+
+    def complete_str(self):
+        return ' '.join(self.packages_complete)
+
+
+if __name__ == "__main__":
+    bld = BlenderVersion(version='5.0.0')
+    dep = BlenderDependency(blender=bld)
+    
+    print('Show All packages:')
+    print(dep.__str__())