amend windows installer

fetch.py

@@ -56,11 +56,22 @@ async def log_request(request: Request, call_next: Any):
 
 @app.get("/")
 def read_root(request: Request):
+    """Main URL returning an executable installer script.
+
+    Query parameters can be used to install specific things, e.g.
+    curl -fsSL "https://pup-py-fetch.hf.space?python=3.11&pixi=marimo&myenv=cowsay,duckdb"
+
+    Package specs "duckdb>=1.1" are not supported.
+    """
+
     query_params = dict(request.query_params)
     py_ver = query_params.pop("python", "3.12")
     if "Windows" in request.headers.get("user-agent"):
         pup_url = "https://raw.githubusercontent.com/liquidcarbon/puppy/main/pup.ps1"
-        script = [f"& ([scriptblock]::Create((iwr -useb {pup_url}).Content)) {py_ver}"]
+        script = [
+            f"$pup_ps1 = (iwr -useb {pup_url}).Content",
+            f"& ([scriptblock]::Create($pup_ps1)) {py_ver}",
+        ]
     else:
         pup_url = "https://raw.githubusercontent.com/liquidcarbon/puppy/main/pup.sh"
         script = [f"curl -fsSL {pup_url} | bash -s {py_ver}"]

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "fetch"
-version = "0.3.0"
+version = "0.3.1"
 description = "Puppy Installer"
 authors = [
     { name = "Alex Kislukhin" }