Add building a configuration from the current situation

lib/ypconfig/Netlink.py

+#!/usr/bin/env python3
+
+from pyroute2 import IPRoute
+from pyroute2 import IPDB
+
+def GetNow():
+    ip = IPRoute()
+    ret = {}
+
+    for iface in ip.get_links():
+        this = {}
+        this['type'] = 'default'
+        this['name'] = iface.get_attr('IFLA_IFNAME')
+        addrs = []
+        for addr in ip.get_addr(index=iface['index']):
+            if addr.get_attr('IFA_ADDRESS').startswith('fe80:'):
+                # We don't store link-locals
+                continue
+            fa = '/'.join([addr.get_attr('IFA_ADDRESS'), str(addr['prefixlen'])])
+            addrs.append(fa)
+
+        if len(addrs) > 0:
+            this['addresses'] = addrs
+
+        this['adminstate'] = iface.get_attr('IFLA_OPERSTATE')
+        this['mtu'] = iface.get_attr('IFLA_MTU')
+
+        if iface.get_attr('IFLA_LINKINFO'):
+            try:
+                linfo = iface.get_attr('IFLA_LINKINFO')
+                if linfo.get_attr('IFLA_INFO_KIND') == 'vlan':
+                    # Get the parents name
+                    pname = ip.get_links(iface.get_attr('IFLA_LINK'))[0].get_attr('IFLA_IFNAME')
+                    try:
+                        ret[pname]
+                    except KeyError:
+                        ret[pname] = {}
+
+                    try:
+                        ret[pname]['vlans']
+                    except KeyError:
+                        ret[pname]['vlans'] = []
+
+                    
+                    this['type'] = 'vlan'
+                    this['vlanid'] = linfo.get_attr('IFLA_INFO_DATA').get_attr('IFLA_VLAN_ID')
+                    ret[pname]['vlans'].append(this)
+            except Exception as e:
+                print(e)
+                pass
+        else:
+            ret[this['name']] = this
+
+    return ret

ypconfig

@@ -13,7 +13,7 @@ Options:
 import sys, os
 sys.path.insert(0, '/home/mark/src/ypconfig/lib')
 
-from ypconfig import Config
+from ypconfig import Config, Netlink
 from docopt import docopt
 from schema import Schema, And, Or, Use, SchemaError, Optional
 from pprint import pprint
@@ -32,11 +32,12 @@ if __name__ == '__main__':
     except SchemaError as e:
         sys.exit(e)
 
-    try:
-        cfgdoc = Config.Get(args['--cfg'])
-    except FileNotFoundError as e:
-        print(e)
-        sys.exit(1)
+    if not args['createconfig']:
+        try:
+            cfgdoc = Config.Get(args['--cfg'])
+        except FileNotFoundError as e:
+            print(e)
+            sys.exit(1)
 
     if args['configtest']:
         try:
@@ -46,3 +47,6 @@ if __name__ == '__main__':
             sys.exit(1)
         else:
             print("Configuration is ok!")
+    elif args['createconfig']:
+        cfg = Netlink.GetNow()
+        pprint(Config.Validate(cfg))