Add parameters metadata for qgc

Metadata is updated manually for now.

tools/metadata.py

@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+
+# Script for checking and updating the metadata files
+
+import sys
+import re
+from pathlib import Path
+import json
+import zlib
+import requests
+
+def mavlink_crc323(data: bytes) -> int:
+    return (zlib.crc32(data, 0xFFFFFFFF) ^ 0xFFFFFFFF) & 0xFFFFFFFF
+
+
+parameter_regexp = re.compile(r'^\s+\{"(?P<name>[^"]+)",\s*&(?P<variable>[^,]+)(.*)\},?$', re.MULTILINE)
+
+parameters_source_file = Path(__file__).parent.parent / 'flix' / 'parameters.ino'
+parameters_code = parameters_source_file.read_text()
+parameters_meta_file = Path(__file__).parent / 'parameters.json'
+parameters_meta = json.loads(parameters_meta_file.read_text())
+assert parameters_meta['version'] == 1
+
+parameters = parameter_regexp.finditer(parameters_code)
+
+for parameter in parameters:
+    name = parameter.group('name')
+    variable = parameter.group('variable')
+
+    for meta in parameters_meta['parameters']:
+        name_meta = meta['name']
+
+        # handle {n} wildcards
+        regex = re.sub(r'\{[^\}]+\}', r'.*', name_meta)
+
+        if re.fullmatch(regex, name):
+            break
+
+    else:
+        raise RuntimeError(f'Parameter {name} is missing in parameters.json')
+
+
+general_meta_file = Path(__file__).parent / 'general.json'
+general_crc = mavlink_crc323(general_meta_file.read_bytes())
+general_data = json.loads(general_meta_file.read_text())
+
+parameters_crc = mavlink_crc323(parameters_meta_file.read_bytes())
+
+general_url = f'https://quadcopter.dev/meta/{general_crc}/general.json'
+parameters_url = f'https://quadcopter.dev/meta/{parameters_crc}/parameters.json'
+
+print(f'General CRC: {general_crc}')
+print(f'Parameters CRC: {mavlink_crc323(parameters_meta_file.read_bytes())}')
+print(f'General URL: {general_url}')
+print(f'Parameters URL: {parameters_url}')
+
+code = 0
+
+assert general_data['version'] == 1
+for meta in general_data['metadataTypes']:
+    if meta['type'] == 1:
+        if meta['uri'] != parameters_url:
+            print(f'ERROR: Parameters URI should be {parameters_url}')
+            code = 1
+        if meta['fileCrc'] != parameters_crc:
+            print(f'ERROR: Parameters CRC shoule be {parameters_crc}')
+            code = 1
+    break
+else:
+    print('ERROR: Parameters metadata not found in general.json')
+    code = 1
+
+resp = requests.get(general_url, allow_redirects=True)
+resp.raise_for_status()
+assert resp.json() == general_data
+
+resp = requests.get(parameters_url, allow_redirects=True)
+resp.raise_for_status()
+assert resp.json() == parameters_meta
+
+if code == 0:
+    print('Everything is good')
+sys.exit(code)