MSYS2 testing fixes

mmgen/color.py

@@ -84,8 +84,15 @@ def init_color(num_colors='auto'):
 
 	if num_colors == 'auto':
 		import os
-		t = os.getenv('TERM')
-		num_colors = 256 if (t and t.endswith('256color')) or get_terminfo_colors() == 256 else 16
+		if sys.platform == 'win32':
+			# Force 256-color for MSYS2: terminal supports it, however infocmp reports 8-color.
+			# We also avoid spawning a subprocess, leading to a subsequent OSError 22 when testing
+			# with pexpect spawn.
+			num_colors = 256
+		elif (t := os.getenv('TERM')) and t.endswith('256color'):
+			num_colors = 256
+		else:
+			num_colors = get_terminfo_colors() or 16
 
 	reset = '\033[0m'
 	if num_colors == 0:

mmgen/fileutil.py

@@ -38,12 +38,13 @@ def check_or_create_dir(path):
 		os.listdir(path)
 	except:
 		if os.getenv('MMGEN_TEST_SUITE'):
-			from subprocess import run
-			run([
-				('rm' if sys.platform == 'win32' else '/bin/rm'),
-				'-rf',
-				path ])
-			set_vt100()
+			if os.path.exists(path): # path is a link or regular file
+				from subprocess import run
+				run([
+					('rm' if sys.platform == 'win32' else '/bin/rm'),
+					'-rf',
+					path ])
+				set_vt100()
 		try:
 			os.makedirs(path,0o700)
 		except:

setup.cfg

@@ -35,7 +35,7 @@ classifiers  =
 	Development Status :: 5 - Production/Stable
 
 [options]
-python_requires = >=3.7
+python_requires = >=3.8
 include_package_data = True
 
 install_requires =

test/cmdtest_py_d/ct_main.py

@@ -309,8 +309,6 @@ class CmdTestMain(CmdTestBase,CmdTestShared):
 		CmdTestBase.__init__(self,trunner,cfgs,spawn)
 		if trunner is None or self.proto.coin.lower() not in self.networks:
 			return
-		self.rpc = async_run(rpc_init(cfg,self.proto))
-		self.lbl_id = ('account','label')['label_api' in self.rpc.caps]
 		if self.proto.coin in ('BTC','BCH','LTC'):
 			self.tx_fee     = {'btc':'0.0001','bch':'0.001','ltc':'0.01'}[self.proto.coin.lower()]
 			self.txbump_fee = {'btc':'123s','bch':'567s','ltc':'12345s'}[self.proto.coin.lower()]
@@ -318,6 +316,13 @@ class CmdTestMain(CmdTestBase,CmdTestShared):
 		self.unspent_data_file = joinpath('test','trash','unspent.json')
 		self.spawn_env['MMGEN_BOGUS_UNSPENT_DATA'] = self.unspent_data_file
 
+	@property
+	def lbl_id(self):
+		if not hasattr(self,'_lbl_id'):
+			rpc = async_run(rpc_init(cfg,self.proto))
+			self._lbl_id = ('account','label')['label_api' in rpc.caps]
+		return self._lbl_id
+
 	def _get_addrfile_checksum(self,display=False):
 		addrfile = self.get_file_with_ext('addrs')
 		from mmgen.addrlist import AddrList