pySim-shell: add new commandline option "--skip-card-init"

by default pySim-shell does all kinds of probing and file selection
on startup. This is to determine the card type and to find a suitable
card profile. However, in case the card is non yet provisioned this
probing may cause a error messages and even might upset the cards
internal state. So let's have a commandline option thrugh which we
can instruct pySim-shell to skip any initialization and to give us
a prompt immediately, so that we can enter custom APDUs

Related: OS#6367
Change-Id: I1d8a57de201fe7ad7cbcbc6f72969ea8521e821d

pySim/app.py

@@ -19,7 +19,7 @@ from typing import Tuple
 from pySim.transport import LinkBase
 from pySim.commands import SimCardCommands
 from pySim.filesystem import CardModel, CardApplication
-from pySim.cards import card_detect, SimCardBase, UiccCardBase
+from pySim.cards import card_detect, SimCardBase, UiccCardBase, CardBase
 from pySim.runtime import RuntimeState
 from pySim.profile import CardProfile
 from pySim.cdma_ruim import CardProfileRUIM
@@ -42,7 +42,7 @@ import pySim.ara_m
 import pySim.global_platform
 import pySim.euicc
 
-def init_card(sl: LinkBase) -> Tuple[RuntimeState, SimCardBase]:
+def init_card(sl: LinkBase, skip_card_init: bool = False) -> Tuple[RuntimeState, SimCardBase]:
     """
     Detect card in reader and setup card profile and runtime state. This
     function must be called at least once on startup. The card and runtime
@@ -57,6 +57,12 @@ def init_card(sl: LinkBase) -> Tuple[RuntimeState, SimCardBase]:
     print("Waiting for card...")
     sl.wait_for_card(3)
 
+    # The user may opt to skip all card initialization. In this case only the
+    # most basic card profile is selected. This mode is suitable for blank
+    # cards that need card O/S initialization using APDU scripts first.
+    if skip_card_init:
+        return None, CardBase(scc)
+
     generic_card = False
     card = card_detect(scc)
     if card is None: