Skip initial install

Author: doctorperceptron

lib/qml/lib/demo.py

@@ -171,15 +171,6 @@ def build(
     done = 0
     logger.info("Building %d demos", len(demos))
 
-    build_venv = Virtualenv(ctx.repo_root / venv) if venv else Virtualenv(ctx.build_venv_path)
-    logger.info("Using build environment: %s", build_venv.path)
-    cmds.pip_install(
-        build_venv.python,
-        requirements=ctx.build_requirements_file,
-        use_uv=False,
-        quiet=False,
-    )
-
     for demo in demos:
         execute_demo = execute and (demo.executable_latest if dev else demo.executable_stable)
         done += 1
@@ -190,12 +181,11 @@ def build(
             len(demos),
             execute_demo,
         )
-        build_venv = Virtualenv(ctx.build_venv_path)
+        build_venv = Virtualenv(ctx.repo_root / venv) if venv else Virtualenv(ctx.build_venv_path)
         cmds.pip_install(
             build_venv.python,
             requirements=ctx.build_requirements_file,
-            use_uv=False,
-            quiet=False,
+            quiet=quiet,
         )
         try:
             _build_demo(

lib/qml/lib/virtual_env.py

@@ -25,8 +25,4 @@ def _init(self):
         """Initialize a virtual environment."""
         self.path.parent.mkdir(exist_ok=True)
 
-        subprocess.run([sys.executable, "-m", "venv", "--clear", self.path]).check_returncode()
-        subprocess.run(
-            [str(self.python), "-m", "pip", "install", "--upgrade", "pip"],
-            check=True,
-        )
+        subprocess.run([sys.executable, "-m", "venv", "--clear", "--upgrade-deps", self.path]).check_returncode()