This script combines:
tool/input_sdk/lib/... tool/input_sdk/patch/... tool/input_sdk/private/...
and produces the merged SDK sources in:
gen/patched_sdk/...
The result has all “external” keywords replaced with the @patch implementations.
Generally local edits should be to input_sdk/patch and input_sdk/private, as those two directories are specific to DDC. input_sdk/lib should represent unmodified SDK sources to the maximum extent possible. Currently there are slight edits to the type annotations in some cases.
See patch_sdk.dart for more information.
Asserts that the Dart VM is at least a particular semantic version. It returns an exit code to make it easy to integrate with shell scripts.