Add rolesyncer script

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

bin/rolesyncer.py

@@ -0,0 +1,77 @@
+#!/usr/bin/python3
+
+import os
+import pynetbox
+import roles
+
+if not 'NB_HOST' in os.environ or not 'NB_TOKEN' in os.environ:
+    print('Pass NB_HOST and NB_TOKEN as environment variables.')
+    import sys
+    sys.exit(1)
+
+host = os.environ['NB_HOST']
+token = os.environ['NB_TOKEN']
+
+# unlikely to ever change, hence hardcoding the field_id. otherwise we could filter custom_fields for the name 'salt_roles'.
+field_id = 1
+
+def connect(host, token):
+    netbox = pynetbox.api(host, token)
+    return(netbox)
+
+def query_nb(netbox, pk):
+    try:
+        field = netbox.extras.custom_fields.get(pk)
+    except pynetbox.RequestError as myerr:
+        if myerr.req_status_code == 404:
+            print('Custom field not found')
+        raise
+    return(field)
+
+def get_nb(field):
+    choices = field.choices
+    if not choices:
+        return(None)
+    if len(choices) > 0:
+        return(choices)
+
+def get_local():
+    return(roles.get())
+
+def compare(a, b):
+    a.sort()
+    b.sort()
+    if a == b:
+        return(True)
+    if a != b:
+        return(False)
+
+def write_nb(field, roles):
+    field.choices = roles
+    try:
+        if field.save():
+            print('Update complete')
+        else:
+            print('Nothing to update')
+    except:
+        raise
+
+def sync(netbox):
+    field = query_nb(netbox, field_id)
+    roles_local = get_local()
+    roles_nb = get_nb(field)
+
+    if roles_nb is None:
+        print('Roles in NetBox are currently empty')
+
+    is_synced = compare(roles_local, roles_nb)
+
+    if is_synced:
+        print('Roles already in sync')
+    if not is_synced:
+        print('Writing local roles to NetBox ...')
+        write_nb(field, roles_local)
+
+if __name__ == '__main__':
+    netbox = connect(host, token)
+    sync(netbox)