Add --ignore-eol option that allows to run ue4-docker build even on E…

…OL Windows versions

ue4docker/build.py

@@ -119,7 +119,7 @@ def build():
 			logger.info('Directory to copy DLLs from:  {}\n'.format(config.dlldir), False)
 
 			# Verify that the specified base image tag is not a release that has reached End Of Life (EOL)
-			if WindowsUtils.isEndOfLifeWindowsVersion(config.basetag) == True:
+			if not config.ignoreEOL and WindowsUtils.isEndOfLifeWindowsVersion(config.basetag):
 				logger.error('Error: detected EOL base OS image tag: {}'.format(config.basetag), False)
 				logger.error('This version of Windows has reached End Of Life (EOL), which means', False)
 				logger.error('Microsoft no longer supports or maintains container base images for it.', False)

ue4docker/infrastructure/BuildConfiguration.py

@@ -92,6 +92,7 @@ def addArguments(parser):
 		parser.add_argument('--combine', action='store_true', help='Combine generated Dockerfiles into a single multi-stage build Dockerfile')
 		parser.add_argument('--monitor', action='store_true', help='Monitor resource usage during builds (useful for debugging)')
 		parser.add_argument('-interval', type=float, default=20.0, help='Sampling interval in seconds when resource monitoring has been enabled using --monitor (default is 20 seconds)')
+		parser.add_argument('--ignore-eol', action='store_true', help='Run builds even on EOL versions of Windows (advanced use only)')
 		parser.add_argument('--ignore-blacklist', action='store_true', help='Run builds even on blacklisted versions of Windows (advanced use only)')
 		parser.add_argument('-v', '--verbose', action='store_true', help='Enable verbose output during builds (useful for debugging)')
 
@@ -150,6 +151,7 @@ def __init__(self, parser, argv):
 		self.excludedComponents = set(self.args.exclude)
 		self.baseImage = None
 		self.prereqsTag = None
+		self.ignoreEOL = self.args.ignore_eol
 		self.ignoreBlacklist = self.args.ignore_blacklist
 		self.verbose = self.args.verbose
 		self.layoutDir = self.args.layout