Xcode warning: Run script build phase 'Run Script' will be run during every build because it does not specify any outputs

[jmagman]

iOS version at #108321 fixed with #108331

New warnings in Xcode 14 beta 3 on a new flutter create project:

$ flutter build macos
Running "flutter pub get" in test_create...                        467ms
...

warning: Run script build phase 'Run Script' will be run during every build because it does not specify any outputs. To address this warning, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'Flutter Assemble' from project 'Runner')
Building macOS application...

Unchecking adds:

		9740EEB61CF901F6004384FC /* Run Script */ = {
			isa = PBXShellScriptBuildPhase;
+			alwaysOutOfDate = 1;
			buildActionMask = 2147483647;

Xcode isn't handling input/output, flutter is, so it is correct to be unchecked.

This is happening on macOS (only Runner target, not Flutter Assemble, which is using inputs/outputs so the option should be checked).

Update templates and add a migration. Note this check box exists on Xcode 13 so we don't need to increase the minimum version to 14 before doing this.

[jmagman]

cc @cbracken

[omarzl]

We had the same warning using custom script phases so we did the same change: alwaysOutOfDate = 1;
Now we don't have a warning, instead we have a note:

note: Run script build phase 'XX' will be run during every build because the option to run the script phase "Based on dependency analysis" is unchecked

Still quite annoying 🙁

[jmagman]

I forgot I already did the macos_assemble.sh embed migration in July as part of #108331. It's the Run Script that's complaining, which doesn't make any sense because it does specify an output so that should be checked.

Is this an Xcode bug where it's not counting the output xcfilelist?

[jmagman]

@omarzl if you set alwaysOutOfDate = 1; on the assemble Run Script you should remove that, that Flutter script phase is doing proper dependency analysis with inputs and outputs.

In a Flutter macOS project I can't get the warning to even show up after deleting DerivedData. I don't think there's anything to be done here.

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