From b9e7e93bcf4ac40fb494fe1e8c0d2438fd1c99df Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <pavol@rusnak.io>
Date: Sun, 22 Sep 2019 15:07:04 +0200
Subject: [PATCH] core: replace BITCOIN_ONLY with a constant only in
 src/trezor/utils.py

---
 core/site_scons/site_tools/micropython/__init__.py | 13 ++++++++-----
 core/src/trezor/utils.py                           |  3 +++
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/core/site_scons/site_tools/micropython/__init__.py b/core/site_scons/site_tools/micropython/__init__.py
index fa60d1ac8..16306c02a 100644
--- a/core/site_scons/site_tools/micropython/__init__.py
+++ b/core/site_scons/site_tools/micropython/__init__.py
@@ -23,10 +23,13 @@ def generate(env):
         target = str(target[0])
         source = str(source[0])
         source_name = source.replace(env['source_dir'], '')
-        # unroll the utils.BITCOIN_ONLY constant
-        btc_only = 'True' if env['bitcoin_only'] == '1' else 'False'
-        interim = "%s.i" % target[:-4]  # replace .mpy with .i
-        return '$SED "s:utils\.BITCOIN_ONLY:%s:g" %s > %s && $MPY_CROSS -o %s -s %s %s' % (btc_only, source, interim, target, source_name, interim)
+        # set utils.BITCOIN_ONLY to constant in src/trezor/utils.py
+        if source == "src/trezor/utils.py":
+            btc_only = 'True' if env['bitcoin_only'] == '1' else 'False'
+            interim = "%s.i" % target[:-4]  # replace .mpy with .i
+            return '$SED "s:^BITCOIN_ONLY = BITCOIN_ONLY$:BITCOIN_ONLY = %s:g" %s > %s && $MPY_CROSS -o %s -s %s %s' % (btc_only, source, interim, target, source_name, interim)
+        else:
+            return '$MPY_CROSS -o %s -s %s %s' % (target, source_name, source)
 
     env['BUILDERS']['FrozenModule'] = SCons.Builder.Builder(
         generator=generate_frozen_module,
@@ -38,4 +41,4 @@ def generate(env):
 
 
 def exists(env):
-    return True
\ No newline at end of file
+    return True
diff --git a/core/src/trezor/utils.py b/core/src/trezor/utils.py
index f38792359..fbb2a40a5 100644
--- a/core/src/trezor/utils.py
+++ b/core/src/trezor/utils.py
@@ -14,6 +14,9 @@ from trezorutils import (  # noqa: F401
     set_mode_unprivileged,
 )
 
+# Don't remove! This line will be modified when freezing the module
+BITCOIN_ONLY = BITCOIN_ONLY
+
 if __debug__:
     if EMULATOR:
         import uos