[Webkit-unassigned] [Bug 156400] New: Touching any IDL files rebuilds all bindings in CMake Ninja build

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156400

            Bug ID: 156400
           Summary: Touching any IDL files rebuilds all bindings in CMake
                    Ninja build
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Hironori.Fujii at jp.sony.com

Touching any IDL files rebuilds all bindings in CMake Ninja build

preprocess-idls.pl has a function WriteFileIfChanged not to
update files unnecessary to be updated.

preprocess-idls.pl outputs four files supplemental_dependency.tmp,
DOMWindowConstructors.idl, WorkerGlobalScopeConstructors.idl and
DedicatedWorkerGlobalScopeConstructors.idl.  WriteFileIfChanged works
only for DedicatedWorkerGlobalScopeConstructors.idl.

It does not work due to flaky results of 'keys'.
Results of 'keys' are flaky, should be processed by 'sort'.

I tested with GTK port Ninja build:

> ./Tools/Scripts/build-webkit --gtk
> touch Source/WebCore/dom/Document.idl

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