client install: correctly report all failures

In commit 5249eb817e, the client install code
was converted to use exception handling instead of return codes. However,
some return statements were not converted to raise statements and as a
result, ipa-client-install will report success in some error conditions.

Convert the return statements to raise statements to fix the issue.

https://fedorahosted.org/freeipa/ticket/6392

Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>

ipaclient/install/client.py

@@ -2716,13 +2716,13 @@ def _install(options):
             except errors.PublicError as e2:
                 root_logger.warning(
                     "Second connect with delegate=True also failed: %s", e2)
-                root_logger.error(
-                    "Cannot connect to the IPA server RPC interface: %s", e2)
-                return CLIENT_INSTALL_ERROR
+                raise ScriptError(
+                    "Cannot connect to the IPA server RPC interface: %s" % e2,
+                    rval=CLIENT_INSTALL_ERROR)
         except errors.PublicError as e:
-            root_logger.error(
-                "Cannot connect to the server due to generic error: %s", e)
-            return CLIENT_INSTALL_ERROR
+            raise ScriptError(
+                "Cannot connect to the server due to generic error: %s" % e,
+                rval=CLIENT_INSTALL_ERROR)
 
     # Use the RPC directly so older servers are supported
     try:
@@ -2745,8 +2745,9 @@ def _install(options):
     try:
         create_ipa_nssdb()
     except ipautil.CalledProcessError as e:
-        root_logger.error("Failed to create IPA NSS database: %s", e)
-        return CLIENT_INSTALL_ERROR
+        raise ScriptError(
+            "Failed to create IPA NSS database: %s" % e,
+            rval=CLIENT_INSTALL_ERROR)
 
     # Get CA certificates from the certificate store
     try:
@@ -2769,9 +2770,9 @@ def _install(options):
         try:
             ipa_db.add_cert(cert, nickname, trust_flags)
         except CalledProcessError as e:
-            root_logger.error(
-                "Failed to add %s to the IPA NSS database.", nickname)
-            return CLIENT_INSTALL_ERROR
+            raise ScriptError(
+                "Failed to add %s to the IPA NSS database." % nickname,
+                rval=CLIENT_INSTALL_ERROR)
 
     # Add the CA certificates to the platform-dependant systemwide CA store
     tasks.insert_ca_certs_into_systemwide_ca_store(ca_certs)
@@ -2875,7 +2876,7 @@ def _install(options):
                     cli_domain, cli_server, dnsok,
                     options, nosssd_files[configurer.__name__])
                 if retcode:
-                    return CLIENT_INSTALL_ERROR
+                    raise ScriptError(rval=CLIENT_INSTALL_ERROR)
                 if conf:
                     root_logger.info(
                         "%s configured using configuration file(s) %s",