Extend init to maybe create and always DL dev cert

tools/device_management.py

@@ -18,15 +18,16 @@ limitations under the License.
 
 device-management, dev-mgmt, and dm sub command
 """
-from __future__ import print_function
-from builtins import str
+from __future__ import print_function, absolute_import
 import logging
 import sys
 import argparse
 from os.path import join, abspath, dirname, basename
+from os import getenv
 
 from manifesttool import create, parse, verify, cert, init, update
 from manifesttool.argparser import MainArgumentParser
+from mbed_cloud import AccountManagementAPI, CertificatesAPI
 import colorama
 colorama.init()
 
@@ -77,6 +78,40 @@ def wrap_payload(func):
     return inner
 
 
+def wrap_init(func):
+    def inner(options):
+        accounts = AccountManagementAPI()
+        certs = CertificatesAPI()
+        api_key = accounts.list_api_keys(filter={
+            'key': getenv("MBED_CLOUD_SDK_API_KEY")
+        }).next()
+        user = accounts.get_user(api_key.owner_id)
+        certificates_owned = list(certs.list_certificates())
+        dev_cert_info = None
+        for certif in certificates_owned:
+            if certif.type == "developer" and (certif.owner_id == user.id or
+                                               certif.owner_id == api_key.id):
+                dev_cert_info = certs.get_certificate(certif.id)
+                LOG.info("Found developer certificate onwed by %s named %s",
+                         user.full_name, dev_cert_info.name)
+                break
+        else:
+            LOG.warning(
+                "Could not find developer certificate for this account."
+                " Generting a new developer certificate."
+            )
+            dev_cert_info = CertificatesAPI().add_developer_certificate(
+                "mbed-cli-auto {}".format(user.full_name),
+                description="cetificate auto-generated by Mbed CLI"
+            )
+        LOG.info("Writing developer certificate %s into c file "
+                 "mbed_cloud_dev_credentials.c", dev_cert_info.name)
+        with open("mbed_cloud_dev_credentials.c", "w") as fout:
+            fout.write(dev_cert_info.header_file)
+        return func(options)
+    return inner
+
+
 def main():
     options = MbedExtendedArgs().parse_args().options
 
@@ -110,7 +145,7 @@ def main():
         "parse": parse.main,
         "verify": verify.main,
         "cert": cert.main,
-        "init": init.main,
+        "init": wrap_init(init.main),
         "update" : wrap_payload(update.main),
     }[options.action](options) or 0