fix: work in progress on self-update

src/uvx/cli.py

@@ -18,7 +18,7 @@
 from .__about__ import __version__
 from ._cli_support import State
 from ._maybe import Maybe
-from ._python import _python_in_venv, _uv
+from ._python import _python_in_venv, _uv, _pip
 from .core import (
     as_virtualenv,
     format_bools,
@@ -128,11 +128,6 @@ def inject(into: str, package_specs: list[str]):
     )
 
 
-# todo:
-# self-upgrade (uv and uvx)
-# upgrade-all
-
-
 @app.command()
 def upgrade_all(
     force: Annotated[bool, typer.Option("-f", "--force", help="Ignore previous version constraint")] = False,
@@ -146,6 +141,20 @@ def upgrade_all(
         upgrade(venv_name, force=force, skip_injected=skip_injected, no_cache=no_cache)
 
 
+@app.command()
+def self_update(
+    with_uv: Annotated[bool, typer.Option("--with-uv/--without-uv", '-w/-W')] = True,
+):
+    # if in venv and uv available -> upgrade via uv
+    # else: upgrade via pip
+    if os.getenv("VIRTUAL_ENV"):
+        print(_uv)
+    else:
+        print(_pip)
+
+    print(f'self update {with_uv = }')
+
+
 # list
 def _list_short(name: str, metadata: Maybe[Metadata]):
     rich.print("-", name, metadata.map_or("[red]?[/red]", lambda md: md.installed_version))