Improve a work in off-line mode

HISTORY.rst

@@ -7,6 +7,7 @@ PlatformIO 3.0
 3.0.2 (2016-09-??)
 ~~~~~~~~~~~~~~~~~~
 
+* Improved a work in off-line mode
 * Improved Project Generator when custom ``--project-option`` is passed to
   `platformio init <http://docs.platformio.org/en/stable/userguide/cmd_init.html>`__
   command

platformio/maintenance.py

@@ -34,7 +34,9 @@ from platformio.managers.platform import PlatformManager
 from platformio.pioplus import pioplus_update
 
 
-def in_silence(ctx):
+def in_silence(ctx=None):
+    ctx = ctx or app.get_session_var("command_ctx")
+    assert ctx
     ctx_args = ctx.args or []
     return (ctx_args and
             (ctx.args[0] == "upgrade" or "--json-output" in ctx_args))

platformio/util.py

@@ -417,11 +417,13 @@ def get_api_result(path, params=None, data=None):
             return _get_api_result(path, params, data)
         except (requests.exceptions.ConnectionError,
                 requests.exceptions.Timeout) as e:
+            from platformio.maintenance import in_silence
             total += 1
-            click.secho(
-                "[API] ConnectionError: {0} (incremented retry: max={1}, "
-                "total={2})".format(e, max_retries, total),
-                fg="yellow")
+            if not in_silence():
+                click.secho(
+                    "[API] ConnectionError: {0} (incremented retry: max={1}, "
+                    "total={2})".format(e, max_retries, total),
+                    fg="yellow")
             sleep(2 * total)
 
     raise exception.APIRequestError(