Use uv to manage python deps

Instead of having users manually manage python venvs this commit
migrates the python scripts to use `uv` which can handle installing
script dependencies automatically. Additionally it doesn't require
sourcing a venv setup script in every shell where you want to build.

A further improvement on the swift swift side should also be made to use
swiftly to manage swift toolchain versions instead of the `TOOLCHAINS`
env variable.

Author: rauhul

.github/workflows/build-stm.yml

@@ -23,10 +23,8 @@ jobs:
       - name: Checkout repo
         uses: actions/checkout@v4
 
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: 3.11
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
 
       - name: Install ${{ matrix.swift }}
         run: |

README.md

@@ -19,14 +19,9 @@ Each example in this repository contains build and deployment instructions, howe
 
   You can follow the [tutorial here](https://apple.github.io/swift-matter-examples/tutorials/swiftmatterexamples/setup-macos/) for instructions on installing and using nighly Swift toolchains.
 
-2. Install the Python3 dependencies listed in `requirements.txt`.
-
-  ```console
-  $ cd swift-embedded-examples
-  $ python3 -m venv .venv
-  $ source .venv/bin/activate
-  $ python3 -m pip install -r Tools/requirements.txt
-  ```
+2. Install [`uv`](https://github.com/astral-sh/uv) "an extremely fast Python package and project manager".
+
+  You can follow the [instructions here](https://docs.astral.sh/uv/getting-started/installation/) to install `uv`.
 
 ## Catalog of Examples
 

Tools/elf2hex.py

@@ -1,4 +1,10 @@
-#!/usr/bin/env -S python3 -u -tt
+#! /usr/bin/env -S uv run --script
+
+# /// script
+# dependencies = [
+#   "pyelftools==0.31",
+# ]
+# ///
 
 # This source file is part of the Swift open source project
 #

Tools/macho2bin.py

@@ -1,4 +1,10 @@
-#!/usr/bin/env python3 -u -tt
+#! /usr/bin/env -S uv run --script
+
+# /// script
+# dependencies = [
+#   "macholib==1.16.3",
+# ]
+# ///
 
 # This source file is part of the Swift open source project
 #

Tools/macho2uf2.py

@@ -1,4 +1,10 @@
-#!/usr/bin/env python3 -u -tt
+#! /usr/bin/env -S uv run --script
+
+# /// script
+# dependencies = [
+#   "macholib==1.16.3",
+# ]
+# ///
 
 # This source file is part of the Swift open source project
 #