refactor(gen_features): use Rust instead of Python

Done for /embassy-stm32 only
The new generator is in /stm32-gen-features
/stm32-metapac could/should be added too
A CI check "generated features up to date" could/should be performed

embassy-stm32/gen_features.py

@@ -1,54 +0,0 @@
-import os
-import toml
-import yaml
-from glob import glob
-
-try:
-    from yaml import CSafeLoader as SafeLoader
-except ImportError:
-    from yaml import SafeLoader
-
-abspath = os.path.abspath(__file__)
-dname = os.path.dirname(abspath)
-os.chdir(dname)
-
-supported_families = [
-    "STM32F0",
-    'STM32F4',
-    'STM32G0',
-    'STM32L0',
-    'STM32L4',
-    'STM32H7',
-    'STM32WB55',
-    'STM32WL55',
-]
-
-# ======= load chip list
-features = {}
-for f in sorted(glob('../stm32-data/data/chips/*.yaml')):
-    # Use the filename to get the chip name. Ultra fast, we don't have to read YAML!
-    name = os.path.splitext(os.path.basename(f))[0]
-    if any((family in name for family in supported_families)):
-        name = name.lower()
-        # ======= load chip
-        with open(f, 'r') as f:
-            chip = yaml.load(f, Loader=SafeLoader)
-
-        if len(chip['cores']) > 1:
-            for core in chip['cores']:
-                features[name + "_" + core['name']] = ['stm32-metapac/' + name + '_' + core['name']]
-        else:
-            features[name] = ['stm32-metapac/' + name]
-
-# ========= Update Cargo features
-
-SEPARATOR_START = '# BEGIN GENERATED FEATURES\n'
-SEPARATOR_END = '# END GENERATED FEATURES\n'
-HELP = '# Generated by gen_features.py. DO NOT EDIT.\n'
-with open('Cargo.toml', 'r') as f:
-    cargo = f.read()
-before, cargo = cargo.split(SEPARATOR_START, maxsplit=1)
-_, after = cargo.split(SEPARATOR_END, maxsplit=1)
-cargo = before + SEPARATOR_START + HELP + toml.dumps(features) + SEPARATOR_END + after
-with open('Cargo.toml', 'w') as f:
-    f.write(cargo)