gnu: qtbase: Have qmlimportscanner honor QML_IMPORT_PATH.

* gnu/packages/qt.scm (qtbase) [source]: Apply
qtbase-qmlimportscanner-qml-import-path.patch patch.
* gnu/packages/patches/qtbase-qmlimportscanner-qml-import-path.patch: New
file.
* gnu/local.mk (dist_patch_DATA): Register it.

Change-Id: I256939aa30a5d158ac0a78b85670b9f287c920ca

gnu/local.mk

@@ -1967,6 +1967,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/qtbase-absolute-runpath.patch		\
   %D%/packages/patches/qtbase-find-tools-in-PATH.patch		\
   %D%/packages/patches/qtbase-qmake-fix-includedir.patch 	\
+  %D%/packages/patches/qtbase-qmlimportscanner-qml-import-path.patch 	\
   %D%/packages/patches/qtbase-moc-ignore-gcc-macro.patch	\
   %D%/packages/patches/qtbase-qmake-use-libname.patch		\
   %D%/packages/patches/qtbase-5-use-TZDIR.patch			\

gnu/packages/patches/qtbase-qmlimportscanner-qml-import-path.patch

@@ -0,0 +1,33 @@
+Retrieved from nixpkgs.
+Modified to use QML_IMPORT_PATH instead of QML2_IMPORT_PATH.
+
+From d7a9a3b0ecdbb1b5829f25954d763d767f1c8794 Mon Sep 17 00:00:00 2001
+From: Nick Cao <nickcao@nichi.co>
+Date: Tue, 10 Oct 2023 10:12:56 -0400
+Subject: [PATCH 07/11] qtbase: pass to qmlimportscanner the QML2_IMPORT_PATH
+
+---
+ src/tools/macdeployqt/shared/shared.cpp | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/src/tools/macdeployqt/shared/shared.cpp b/src/tools/macdeployqt/shared/shared.cpp
+index 2ae4f998944..ba10ae02bcd 100644
+--- a/src/tools/macdeployqt/shared/shared.cpp
++++ b/src/tools/macdeployqt/shared/shared.cpp
+@@ -1297,6 +1297,13 @@ bool deployQmlImports(const QString &appBundlePath, DeploymentInfo deploymentInf
+     argumentList.append( "-importPath");
+     argumentList.append(qmlImportsPath);
+ 
++    // In a modularized installation of qt as we have in Nix, instead, we will
++    // read the paths from the environment, as they are spread in multiple
++    // locations and normally set in the environment like this
++    auto envQmlImportPaths = ::qgetenv("QML_IMPORT_PATH").split(':');
++    for (const QString &importPath : envQmlImportPaths)
++        argumentList << "-importPath" << importPath;
++
+     // run qmlimportscanner
+     QProcess qmlImportScanner;
+     qmlImportScanner.start(qmlImportScannerPath, argumentList);
+-- 
+2.42.0
+

gnu/packages/qt.scm

@@ -730,9 +730,11 @@ developers using C++ or QML, a CSS & JavaScript like language.")
                             (list "double-conversion" "freetype" "harfbuzz-ng"
                                   "pcre2" "md4c" "libpng" "libjpeg"
                                   "sqlite" "xcb" "zlib"))))
-              (patches (search-patches "qtbase-moc-ignore-gcc-macro.patch"
+              (patches
+               (search-patches "qtbase-moc-ignore-gcc-macro.patch"
                                "qtbase-absolute-runpath.patch"
                                "qtbase-qmake-use-libname.patch"
+                               "qtbase-qmlimportscanner-qml-import-path.patch"
                                "qtbase-find-tools-in-PATH.patch"
                                "qtbase-qmake-fix-includedir.patch"))))
     (build-system cmake-build-system)