add facts script for usb and pci ids

roles/yavdr-common/files/hardware.facts.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# This script returns a list of Vendor- and Product-IDs for all connected usb
+# and pci(e) devices in json format
+import glob
+import json
+import os
+import sys
+import usb.core
+from collections import namedtuple
+
+
+Device = namedtuple("Device", ['idVendor', 'idProduct'])
+
+def get_pci_devices():
+    for device in glob.glob('/sys/devices/pci*/*:*:*/'):
+        with open(os.path.join(device, 'device')) as d:
+            product_id = int(d.read().strip(), 16)
+        with open(os.path.join(device, 'vendor')) as d:
+            vendor_id = int(d.read().strip(), 16)
+        yield Device(idVendor=vendor_id, idProduct=product_id)
+
+def format_device_list(iterator):
+    return ["{:04x}:{:04x}".format(d.idVendor, d.idProduct) for d in iterator]
+
+
+if __name__ == '__main__':
+    usb_devices = format_device_list(usb.core.find(find_all=True))
+    pci_devices = format_device_list(get_pci_devices())
+    print(json.dumps({'usb': usb_devices, 'pci': pci_devices}))