[db-api/configuration] simplify db-api and configuration so that all the connection information is in the repository url, closes #2521848 eg no more specific option of pyro ns host, group, etc. This also fixes broken ZMQ sources. Changes: * dropped pyro-ns-host, pyro-instance-id, pyro-ns-group from client side config, in favor of repository-uri. No migration done, supposing there is **no web-only config** in the wild. Also stop discovering the connection method through the repo_method class attribute of the configuration, varying according to the configuration class. This is a first step on the way to a simpler configuration handling. Notice those pyro options are still available for repository only / all-in-one configurations as they are needed to configure the pyro server. * stop telling connection method using ConnectionProperties, this is so boring. Also, drop _cnxtype from Connection and cnxtype from Session. The former is replaced by a is_repo_in_memory property and the later is totaly useless. * deprecate in_memory_cnx which becomes useless, use _repo_connect instead

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from base64 import b64decode, b64encode

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try:

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    uri, newdn = __args__

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except ValueError:

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    print 'USAGE: cubicweb-ctl shell <instance> ldap_change_base_dn.py -- <ldap source uri> <new dn>'

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    print

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    print 'you should not have updated your sources file yet'

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olddn = repo.config.sources()[uri]['user-base-dn']

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assert olddn != newdn

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raw_input("Ensure you've stopped the instance, type enter when done.")

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for eid, extid in sql("SELECT eid, extid FROM entities WHERE source='%s'" % uri):

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    olduserdn = b64decode(extid)

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    newuserdn = olduserdn.replace(olddn, newdn)

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    if newuserdn != olduserdn:

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        print olduserdn, '->', newuserdn

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        sql("UPDATE entities SET extid='%s' WHERE eid=%s" % (b64encode(newuserdn), eid))

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commit()

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print 'you can now update the sources file to the new dn and restart the instance'