Move build-script apply default arguments into separate module (#11882)

* Moved the default argument application logic to the new driver_arguments module in preparation for the larger argument parsing refactor.

* Re-ordered imports in order to satisfy python linter.

Author: Rostepher

utils/build-script

@@ -245,227 +245,14 @@ class BuildScriptInvocation(object):
 
     @staticmethod
     def apply_default_arguments(toolchain, args):
-        """Preprocess an argument set to apply default behaviors."""
-
-        # Build cmark if any cmark-related options were specified.
-        if (args.cmark_build_variant is not None):
-            args.build_cmark = True
-
-        # Build LLDB if any LLDB-related options were specified.
-        if args.lldb_build_variant is not None or \
-           args.lldb_assertions is not None:
-            args.build_lldb = True
-
-        # Set the default build variant.
-        if args.build_variant is None:
-            args.build_variant = "Debug"
-
-        # Set the default stdlib-deployment-targets, if none were provided.
-        if args.stdlib_deployment_targets is None:
-            stdlib_targets = \
-                StdlibDeploymentTarget.default_stdlib_deployment_targets()
-            args.stdlib_deployment_targets = [
-                target.name for target in stdlib_targets]
-
-        if args.llvm_build_variant is None:
-            args.llvm_build_variant = args.build_variant
-
-        if args.swift_build_variant is None:
-            args.swift_build_variant = args.build_variant
-
-        if args.swift_stdlib_build_variant is None:
-            args.swift_stdlib_build_variant = args.build_variant
-
-        if args.cmark_build_variant is None:
-            args.cmark_build_variant = args.swift_build_variant
-
-        if args.lldb_build_variant is None:
-            args.lldb_build_variant = args.build_variant
-
-        if args.foundation_build_variant is None:
-            args.foundation_build_variant = args.build_variant
-
-        if args.libdispatch_build_variant is None:
-            args.libdispatch_build_variant = args.build_variant
-
-        if args.libicu_build_variant is None:
-            args.libicu_build_variant = args.build_variant
-
-        # Assertions are enabled by default.
-        if args.assertions is None:
-            args.assertions = True
-
-        # Propagate the default assertions setting.
-        if args.cmark_assertions is None:
-            args.cmark_assertions = args.assertions
-
-        if args.llvm_assertions is None:
-            args.llvm_assertions = args.assertions
-
-        if args.swift_assertions is None:
-            args.swift_assertions = args.assertions
-
-        if args.swift_stdlib_assertions is None:
-            args.swift_stdlib_assertions = args.assertions
-
-        # Set the default CMake generator.
-        if args.cmake_generator is None:
-            args.cmake_generator = "Ninja"
-
-        # --ios-all etc are not supported by open-source Swift.
-        if args.ios_all:
-            exit_rejecting_arguments("error: --ios-all is unavailable in " +
-                                     "open-source Swift.\nUse --ios to " +
-                                     "skip iOS device tests.")
-
-        if args.tvos_all:
-            exit_rejecting_arguments("error: --tvos-all is unavailable in " +
-                                     "open-source Swift.\nUse --tvos to " +
-                                     "skip tvOS device tests.")
-
-        if args.watchos_all:
-            exit_rejecting_arguments("error: --watchos-all is unavailable " +
-                                     "in open-source Swift.\nUse --watchos " +
-                                     "to skip watchOS device tests.")
+        driver_arguments.apply_default_arguments(args)
 
+        # infer if ninja is required
         ninja_required = (
             args.cmake_generator == 'Ninja' or args.build_foundation)
         if ninja_required and toolchain.ninja is None:
             args.build_ninja = True
 
-        # SwiftPM and XCTest have a dependency on Foundation.
-        # On OS X, Foundation is built automatically using xcodebuild.
-        # On Linux, we must ensure that it is built manually.
-        if ((args.build_swiftpm or args.build_xctest) and
-                platform.system() != "Darwin"):
-            args.build_foundation = True
-
-        # Foundation has a dependency on libdispatch.
-        # On OS X, libdispatch is provided by the OS.
-        # On Linux, we must ensure that it is built manually.
-        if (args.build_foundation and
-                platform.system() != "Darwin"):
-            args.build_libdispatch = True
-
-        # Propagate global --skip-build
-        if args.skip_build:
-            args.skip_build_linux = True
-            args.skip_build_freebsd = True
-            args.skip_build_cygwin = True
-            args.skip_build_osx = True
-            args.skip_build_ios = True
-            args.skip_build_tvos = True
-            args.skip_build_watchos = True
-            args.skip_build_android = True
-            args.skip_build_benchmarks = True
-            args.build_lldb = False
-            args.build_llbuild = False
-            args.build_swiftpm = False
-            args.build_xctest = False
-            args.build_foundation = False
-            args.build_libdispatch = False
-            args.build_libicu = False
-            args.build_playgroundlogger = False
-            args.build_playgroundsupport = False
-
-        # --skip-{ios,tvos,watchos} or --skip-build-{ios,tvos,watchos} are
-        # merely shorthands for --skip-build-{**os}-{device,simulator}
-        if not args.ios or args.skip_build_ios:
-            args.skip_build_ios_device = True
-            args.skip_build_ios_simulator = True
-
-        if not args.tvos or args.skip_build_tvos:
-            args.skip_build_tvos_device = True
-            args.skip_build_tvos_simulator = True
-
-        if not args.watchos or args.skip_build_watchos:
-            args.skip_build_watchos_device = True
-            args.skip_build_watchos_simulator = True
-
-        if not args.android or args.skip_build_android:
-            args.skip_build_android = True
-
-        # --validation-test implies --test.
-        if args.validation_test:
-            args.test = True
-
-        # --test-optimized implies --test.
-        if args.test_optimized:
-            args.test = True
-
-        # --test-optimize-size implies --test.
-        if args.test_optimize_for_size:
-            args.test = True
-
-        # If none of tests specified skip swift stdlib test on all platforms
-        if not args.test and not args.validation_test and not args.long_test:
-            args.skip_test_linux = True
-            args.skip_test_freebsd = True
-            args.skip_test_cygwin = True
-            args.skip_test_osx = True
-            args.skip_test_ios = True
-            args.skip_test_tvos = True
-            args.skip_test_watchos = True
-
-        # --skip-test-ios is merely a shorthand for host and simulator tests.
-        if args.skip_test_ios:
-            args.skip_test_ios_host = True
-            args.skip_test_ios_simulator = True
-        # --skip-test-tvos is merely a shorthand for host and simulator tests.
-        if args.skip_test_tvos:
-            args.skip_test_tvos_host = True
-            args.skip_test_tvos_simulator = True
-        # --skip-test-watchos is merely a shorthand for host and simulator
-        # --tests.
-        if args.skip_test_watchos:
-            args.skip_test_watchos_host = True
-            args.skip_test_watchos_simulator = True
-
-        # --skip-build-{ios,tvos,watchos}-{device,simulator} implies
-        # --skip-test-{ios,tvos,watchos}-{host,simulator}
-        if args.skip_build_ios_device:
-            args.skip_test_ios_host = True
-        if args.skip_build_ios_simulator:
-            args.skip_test_ios_simulator = True
-
-        if args.skip_build_tvos_device:
-            args.skip_test_tvos_host = True
-        if args.skip_build_tvos_simulator:
-            args.skip_test_tvos_simulator = True
-
-        if args.skip_build_watchos_device:
-            args.skip_test_watchos_host = True
-        if args.skip_build_watchos_simulator:
-            args.skip_test_watchos_simulator = True
-
-        if args.skip_build_android:
-            args.skip_test_android_host = True
-
-        if not args.host_test:
-            args.skip_test_ios_host = True
-            args.skip_test_tvos_host = True
-            args.skip_test_watchos_host = True
-            args.skip_test_android_host = True
-
-        if args.build_subdir is None:
-            args.build_subdir = \
-                workspace.compute_build_subdir(args)
-
-        # Add optional stdlib-deployment-targets
-        if args.android:
-            args.stdlib_deployment_targets.append(
-                StdlibDeploymentTarget.Android.armv7.name)
-
-        # Infer platform flags from manually-specified configure targets.
-        # This doesn't apply to Darwin platforms, as they are
-        # already configured. No building without the platform flag, though.
-
-        android_tgts = [tgt for tgt in args.stdlib_deployment_targets
-                        if StdlibDeploymentTarget.Android.contains(tgt)]
-        if not args.android and len(android_tgts) > 0:
-            args.android = True
-            args.skip_build_android = True
-
 # ---
 
     def __init__(self, toolchain, args):