do not run commands split on spaces

install.py

@@ -42,8 +42,8 @@ def main():
         env_builder.create(venv_path)
         venv_context = env_builder.context
 
-        python_run(venv_context, "pip", "install -U pip")
-        python_run(venv_context, "pip", "install -e {}".format(_ROOT_DIR))
+        python_run(venv_context, "pip", ["install", "-U", "pip"])
+        python_run(venv_context, "pip", ["install", "-e", str(_ROOT_DIR)])
 
 if __name__ == "__main__":
     main()

prepare.py

@@ -25,8 +25,9 @@ def main():
 
     env_builder = venv.EnvBuilder(with_pip=True)
     venv_context = env_builder.ensure_directories(venv_path)
+    requirements_path = _ROOT_DIR / 'dev_requirements.txt'
 
-    python_run(venv_context, "pip", "install -r {}".format(_ROOT_DIR / 'dev_requirements.txt'))
+    python_run(venv_context, "pip", ["install", "-r", str(requirements_path)])
 
 if __name__ == "__main__":
     main()

run-python3.js

@@ -25,4 +25,5 @@ runPython3(...process.argv.slice(2)).catch(err => {
   if (!error.startsWith("Error: Command failed")) {
     console.error(error);
   }
+  process.exit(1);
 });

venvtools.py

@@ -61,7 +61,7 @@ def python_run(venv_context, module, command=None, *, additional_dir=".", error_
         cmd_line= [
             venv_context.env_exe,
             "-m", module
-        ] + (command.split() if command else [])
+        ] + (command if command else [])
         print("Executing: {}".format(" ".join(cmd_line)), file=sys.stderr)
         subprocess.run(
             cmd_line,