Support for XCBuild includes specifying inputs and outputs to various Run Script build phases. These inputs and outputs are specified as .xcfilelist files. Once created, these .xcfilelist files need to be kept up-to-date. In order to check that they are up-to-date or not, add an Xcode build step that invokes an external script that performs the checking. If the .xcfilelists are found to be out-of-date, update them, halt the build, and instruct the developer to restart the build with up-to-date files.
At this time, the checking and regenerating is performed only if the WK_ENABLE_CHECK_XCFILELISTS environment variable is set to 1. People who want to use this facility can set this variable and test out the checking/regenerating. Once it seems like there are no egregious issues that upset a developer's workflow, we'll unconditionally enable this facility.
Created attachment 360175 [details]
Comment on attachment 360175 [details]
Clearing flags on attachment: 360175
Committed r240525: <https://trac.webkit.org/changeset/240525>
All reviewed patches have been landed. Closing bug.