Handle manual specification of cx_Freeze packages required

o Report problems, when Paper Wallet support is not available

Author: pjkundert

GNUmakefile

@@ -168,6 +168,7 @@ installer:		$(INSTALLER)
 
 dmg:			build-deps app-dmg-valid
 msi:			build-deps dist/slip39-$(VERSION)-win64.msi
+exe:			build-deps build/exe.$(CXFREEZE_EXT)/SLIP-39.exe
 app:			build-deps dist/SLIP-39.app
 
 app-packages:		app-zip-valid app-dmg-valid app-pkg-valid

setup.py

@@ -3,6 +3,24 @@
 import glob
 import fnmatch
 
+
+# 
+# All platforms
+# 
+HERE				= os.path.dirname( os.path.abspath( __file__ ))
+
+install_requires		= open( os.path.join( HERE, "requirements.txt" )).readlines()
+tests_require			= open( os.path.join( HERE, "requirements-tests.txt" )).readlines()
+extras_require			= {
+    option: open( os.path.join( HERE, f"requirements-{option}.txt" )).readlines()
+    for option in [
+        'gui',		# slip39[gui]:    Support PySimpleGUI/tkinter Graphical UI App
+        'dev',		# slip39[dev]:    All modules to support development
+        'serial',	# slip39[serial]: Support serial I/O of generated wallet data
+        'wallet',	# slip39[wallet]: Paper Wallet and BIP-38/Ethereum wallet encryption
+    ]
+}
+
 Executable			= None
 if sys.platform == 'win32':
     # We use cx_Freeze for executable/installer packaging on Windows, only, for now.
@@ -60,7 +78,9 @@
     )
 
     build_exe_options		= dict(
-        packages	= [],
+        packages	= [
+            'eth_account', 'Crypto', 'hdwallet', 'shamir_mnemonic', 'cytoolz', 'eth_hash',
+        ],
         excludes	= [],
         include_msvcr	= True,
     )
@@ -115,12 +135,6 @@
     )
 '''
 
-
-# 
-# All platforms
-# 
-HERE				= os.path.dirname( os.path.abspath( __file__ ))
-
 # Must work if setup.py is run in the source distribution context, or from
 # within the packaged distribution directory.
 __version__			= None
@@ -140,18 +154,6 @@
     'console_scripts': 		console_scripts,
 }
 
-install_requires		= open( os.path.join( HERE, "requirements.txt" )).readlines()
-tests_require			= open( os.path.join( HERE, "requirements-tests.txt" )).readlines()
-extras_require			= {
-    option: open( os.path.join( HERE, f"requirements-{option}.txt" )).readlines()
-    for option in [
-        'gui',		# slip39[gui]:    Support PySimpleGUI/tkinter Graphical UI App
-        'dev',		# slip39[dev]:    All modules to support development
-        'serial',	# slip39[serial]: Support serial I/O of generated wallet data
-        'wallet',	# slip39[wallet]: Paper Wallet and BIP-38/Ethereum wallet encryption
-    ]
-}
-
 package_dir			= {
     "slip39":			"./slip39",
     "slip39.layout":		"./slip39/layout",

slip39/api.py

@@ -7,6 +7,7 @@
 import math
 import re
 import secrets
+import warnings
 
 from functools		import wraps
 from collections	import namedtuple
@@ -17,30 +18,48 @@
 import hdwallet
 from hdwallet		import cryptocurrencies
 
+log				= logging.getLogger( __package__ )
+
 # Support for private key encryption via BIP-38 and Ethereum JSON wallet is optional; pip install slip39[wallet]
+paper_wallet_issues		= []
 try:
     from Crypto.Cipher	import AES
     from Crypto.Protocol.KDF import scrypt
-except ImportError:
+except ImportError as exc:
     AES				= None
     scrypt			= None
+    message			= f"Unable to support Paper Wallet output: {exc}"
+    warnings.warn( message, ImportWarning )
+    log.warning( message )
+    if log.isEnabledFor( logging.DEBUG ):
+        log.exception( message )
+    paper_wallet_issues.append( message )
+
 try:
     import eth_account
-except ImportError:
+except ImportError as exc:
     eth_account			= None
+    message			= f"Unable to support Paper Wallet output: {exc}"
+    warnings.warn( message, ImportWarning )
+    log.warning( message )
+    if log.isEnabledFor( logging.DEBUG ):
+        log.exception( message )
+    paper_wallet_issues.append( message )
 
 from .defaults		import BITS_DEFAULT, BITS, MNEM_ROWS_COLS, GROUP_REQUIRED_RATIO, CRYPTO_PATHS
 from .util		import ordinal
 
 
 RANDOM_BYTES			= secrets.token_bytes
 
-log				= logging.getLogger( __package__ )
 
 
 def paper_wallet_available():
     """Determine if encrypted BIP-38 and Ethereum JSON Paper Wallets are available."""
-    return AES and scrypt and eth_account
+    available			=  AES and scrypt and eth_account
+    if not available:
+        log.warning( f"Paper Wallets unavalailable: {', '.join( paper_wallet_issues )}" )
+    return available
 
 
 def path_edit(