Create repairs issue if an outdated currency code is configured (#81717)

* Create repairs issue if an outdated currency code is configured

* Add script for updating list of currencies

* Use black for formatting

* Move currency codes to a separate file

* Address review comments

script/currencies.py

@@ -0,0 +1,55 @@
+"""Helper script to update currency list from the official source."""
+import pathlib
+
+import black
+from bs4 import BeautifulSoup
+import requests
+
+BASE = """
+\"\"\"Automatically generated by currencies.py.
+
+To update, run python3 -m script.currencies
+\"\"\"
+
+ACTIVE_CURRENCIES = {{ {} }}
+
+HISTORIC_CURRENCIES = {{ {} }}
+""".strip()
+
+req = requests.get(
+    "https://www.six-group.com/dam/download/financial-information/data-center/iso-currrency/lists/list-one.xml"
+)
+soup = BeautifulSoup(req.content, "xml")
+active_currencies = sorted(
+    {
+        x.Ccy.contents[0]
+        for x in soup.ISO_4217.CcyTbl.children
+        if x.name == "CcyNtry"
+        and x.Ccy
+        and x.CcyMnrUnts.contents[0] != "N.A."
+        and "IsFund" not in x.CcyNm.attrs
+        and x.Ccy.contents[0] != "UYW"
+    }
+)
+
+req = requests.get(
+    "https://www.six-group.com/dam/download/financial-information/data-center/iso-currrency/lists/list-three.xml"
+)
+soup = BeautifulSoup(req.content, "xml")
+historic_currencies = sorted(
+    {
+        x.Ccy.contents[0]
+        for x in soup.ISO_4217.HstrcCcyTbl.children
+        if x.name == "HstrcCcyNtry"
+        and x.Ccy
+        and "IsFund" not in x.CcyNm.attrs
+        and x.Ccy.contents[0] not in active_currencies
+    }
+)
+
+pathlib.Path("homeassistant/generated/currencies.py").write_text(
+    black.format_str(
+        BASE.format(repr(active_currencies)[1:-1], repr(historic_currencies)[1:-1]),
+        mode=black.Mode(),
+    )
+)