how to generate XML/CLI capabilities from yang model?

[pralala]

Hi,

We need to generate XML capabilities from yang model that can be loaded in NSO using some tool instead of doing a sync-from from a device.
Is there a static way to generate those capabilities/modules?

I tried with pyang. I got the following output

PRALALA-M-27BM:yang pratik$ pyang -f capability viptela-system.yang --capability-entity

http://viptela.com/system?module=viptela-system&revision=2017-05-25&features=
I may have to write some kind of code to extract the URI, revision, modules etc from this string.

I need a solution which is similar to copy-capabalities. But, it is only available to generic or cli based device and not netconf device.
If there is a solution anyone is aware of then please do let me know.

[Dan.Sullivan · Accepted solution]

Hi Pratik,

For netcnonf devices you need to start with a real device and determine the capabilties you will need for you device. Once you understand you can "create" the capabilties fairly quickly. For example consider the following script that copies capabilities from one device to another:

-Dan

def deviceCapabilities(t, src, dst):

      global port

      spath = '/ncs:devices/device{"' + src + '"}'

      dpath = '/ncs:devices/device{"' + dst + '"}'

      cspath = spath + '/capability'

      dspath = dpath + '/capability'

      mspath = spath + '/module'

      mdpath = dpath + '/module'

      with t.cursor(cspath) as caps :

         for cap in caps :

           capability = str(cap[0])

           cp = cspath + '{"' + capability + '"}'

           dp = dspath + '{"' + capability + '"}'

           revision = "none"

           module = "none"

           if (t.exists(cp  + "/revision")) :

               revision = t.get_elem(cp + "/revision");

           if (t.exists(cp + "/module")) :

               module = t.get_elem(cp + "/module");

               msp = mspath + '{"' + str(module) + '"}'

               mdp = mdpath + '{"' + str(module) + '"}'

               if (t.exists(msp)) :

                  if not (t.exists(mdp)) :

                     t.create(mdp)

                  if not (revision == 'none') :

                     t.set_elem(revision, mdp + "/revision")

               if not (t.exists(dp)) :

                 t.create(dp)

                 if not (revision == 'none') :

                    t.set_elem(revision, dp + "/revision")

                 if not (module == 'none') :

                    t.set_elem(module, dp + "/module")

      return True