[REF-1586] [WiP] Use bun as a package manager on windows

Although bun support for windows is currently extremely limited/broken,
eventually we want to migrate over to it for the installation speed gains over
npm.

reflex/constants/compiler.py

@@ -26,6 +26,8 @@ class Ext(SimpleNamespace):
     CSS = ".css"
     # The extension for zip files.
     ZIP = ".zip"
+    # The extension for executable files on Windows.
+    EXE = ".exe"
 
 
 class CompileVars(SimpleNamespace):

reflex/utils/console.py

@@ -27,6 +27,15 @@ def set_log_level(log_level: LogLevel):
     _LOG_LEVEL = log_level
 
 
+def is_debug() -> bool:
+    """Check if the log level is debug.
+
+    Returns:
+        True if the log level is debug.
+    """
+    return _LOG_LEVEL <= LogLevel.DEBUG
+
+
 def print(msg: str, **kwargs):
     """Print a message.
 
@@ -44,7 +53,7 @@ def debug(msg: str, **kwargs):
         msg: The debug message.
         kwargs: Keyword arguments to pass to the print function.
     """
-    if _LOG_LEVEL <= LogLevel.DEBUG:
+    if is_debug():
         msg_ = f"[blue]Debug: {msg}[/blue]"
         if progress := kwargs.pop("progress", None):
             progress.console.print(msg_, **kwargs)

reflex/utils/prerequisites.py

@@ -145,16 +145,13 @@ def get_bun_version() -> version.Version | None:
 
 def get_install_package_manager() -> str | None:
     """Get the package manager executable for installation.
-      Currently on unix systems, bun is used for installation only.
+      Currently, bun is used for installation only.
 
     Returns:
         The path to the package manager.
     """
-    # On Windows, we use npm instead of bun.
     if constants.IS_WINDOWS:
-        return get_package_manager()
+        return get_config().bun_path + constants.Ext.EXE
-
-    # On other platforms, we use bun.
     return get_config().bun_path
 
 
@@ -661,11 +658,6 @@ def install_bun():
     Raises:
         FileNotFoundError: If required packages are not found.
     """
-    # Bun is not supported on Windows.
-    if constants.IS_WINDOWS:
-        console.debug("Skipping bun installation on Windows.")
-        return
-
     # Skip if bun is already installed.
     if os.path.exists(get_config().bun_path) and get_bun_version() == version.parse(
         constants.Bun.VERSION
@@ -674,16 +666,25 @@ def install_bun():
         return
 
     #  if unzip is installed
-    unzip_path = path_ops.which("unzip")
+    if constants.IS_WINDOWS:
-    if unzip_path is None:
+        processes.new_process(
-        raise FileNotFoundError("Reflex requires unzip to be installed.")
+            ["powershell", "-c", f"irm {constants.Bun.INSTALL_URL}.ps1|iex"],
+            env={"BUN_INSTALL": constants.Bun.ROOT_PATH},
+            shell=True,
+            run=True,
+            show_logs=console.is_debug(),
+        )
+    else:
+        unzip_path = path_ops.which("unzip")
+        if unzip_path is None:
+            raise FileNotFoundError("Reflex requires unzip to be installed.")
 
-    # Run the bun install script.
+        # Run the bun install script.
-    download_and_run(
+        download_and_run(
-        constants.Bun.INSTALL_URL,
+            constants.Bun.INSTALL_URL,
-        f"bun-v{constants.Bun.VERSION}",
+            f"bun-v{constants.Bun.VERSION}",
-        BUN_INSTALL=constants.Bun.ROOT_PATH,
+            BUN_INSTALL=constants.Bun.ROOT_PATH,
-    )
+        )
 
 
 def _write_cached_procedure_file(payload: str, cache_file: str):
@@ -880,9 +881,6 @@ def validate_frontend_dependencies(init=True):
             )
             raise typer.Exit(1)
 
-    if constants.IS_WINDOWS:
-        return
-
     if init:
         # we only need bun for package install on `reflex init`.
         validate_bun()