Add existing repository check to workflow and implement check script

scripts/check/existing.py

@@ -0,0 +1,34 @@
+import asyncio
+import os
+import requests
+
+CHECKURL = "https://data-v2.hacs.xyz/removed/repositories.json"
+
+CATEGORIES = [
+    "appdaemon",
+    "integration",
+    "netdaemon",
+    "plugin",
+    "python_script",
+    "template",
+    "theme",
+]
+
+
+async def check():
+    repo = os.environ["REPOSITORY"].lower()
+
+    for category in CATEGORIES:
+        checkurl = f"https://data-v2.hacs.xyz/{category}/repositories.json"
+        try:
+            category_repositories = set(x.lower() for x in requests.get(checkurl).json())
+            if repo in category_repositories:
+                exit(f"::error::'{repo}' alredy exist as a {category} in HACS")
+        except Exception as e:
+            exit(f"::error::{e}")
+
+    print("Repository does not exist in HACS")
+
+
+if __name__ == "__main__":
+    asyncio.get_event_loop().run_until_complete(check())