[Webkit-unassigned] [Bug 271664] New: [iOS 17.4] Local WebKit builds don't use locally-built app extensions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=271664

            Bug ID: 271664
           Summary: [iOS 17.4] Local WebKit builds don't use locally-built
                    app extensions
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Process Model
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ajuma at chromium.org
                CC: achristensen at apple.com, mjs at apple.com,
                    pvollan at apple.com, rohitrao at google.com,
                    sihui_liu at apple.com

When building WebKit for the iOS simulator after 276550 at main (so that USE_EXTENSIONKIT is true), local builds try to use app extensions from the simulator runtime rather than their locally-built counterparts.

For example, rather than using WebKitBuild/Debug-iphonesimulator/WebContentExtension.appex, local builds instead try to use /Library/Developer/CoreSimulator/Volumes/iOS_21E213/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.4.simruntime/Contents/Resources/RuntimeRoot/System/Library/ExtensionKit/Extensions/WebContentExtension.appex

In practice this means that local builds are very broken, since they are combining locally-built WebKit.framework with pre-built app extensions, resulting in mismatching IPC messages.

Is there some additional configuration needed to get ExtensionKit builds working with the public SDK?

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