[Webkit-unassigned] [Bug 206061] New: [GTK][WPE] EWS should not wipe the JHBuild in the unapply patch step

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=206061

            Bug ID: 206061
           Summary: [GTK][WPE] EWS should not wipe the JHBuild in the
                    unapply patch step
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: clopez at igalia.com
                CC: aakash_jain at apple.com, bugs-noreply at webkitgtk.org,
                    dpino at igalia.com, psaavedra at igalia.com

When a patch fails to build or pass tests, the EWS unapplies the patch and tries to run the build or tests again without the patch.

The issue is that to unapply the patch, the EWS its currently calling Tools/Scripts/clean-webkit, which wipes everything.
That means that the JHBuild (step InstallGtkDependencies) has to be rebuilt from scratch and that its expensive (around 30 minutes even with ccache).

The JHBuild scripts already have logic to detect when they should wipe the JHBuild (if a patch touches the moduleset).

Ideally we should not be wiping the JHBuild for GTK and WPE to avoid having to rebuild it after unapplying the patch.

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