python-pyqt5, qtwebengine, qtwebkit, qt-kiosk-browser: skip without meta-python2

Neither of these actually builds with python3, skip them when
meta-python2 isn't included until real fix is available.

qtwebkit might not get the support for python3 at all

qtwebengine I have some changes for the initial build, but there
are many more needed as shown in upstream chromium:
https://bugs.chromium.org/p/chromium/issues/detail?id=942720
https://bugs.chromium.org/p/chromium/issues/list?q=label%3AProj-Python3Migration&can=2

python-pyqt5 is already blacklisted because of sip

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

recipes-python/pyqt5/python-pyqt5_5.13.2.bb

@@ -1,6 +1,11 @@
 require python-pyqt5.inc
 
-inherit pythonnative python-dir
+inherit ${@bb.utils.contains("BBFILE_COLLECTIONS", "meta-python2", "pythonnative python-dir", "", d)}
+
+python() {
+    if 'meta-python2' not in d.getVar('BBFILE_COLLECTIONS').split():
+        raise bb.parse.SkipRecipe('Requires meta-python2 to be present.')
+}
 
 DEPENDS += "sip sip-native python"
 

recipes-qt/qt-kiosk-browser/qt-kiosk-browser_git.bb

@@ -4,6 +4,10 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=1ebbd3e34237af26da5dc08a4e440464"
 LICENSE = "GPLv3"
 
 DEPENDS = "qtwebengine"
+python() {
+    if 'meta-python2' not in d.getVar('BBFILE_COLLECTIONS').split():
+        raise bb.parse.SkipRecipe('qtwebengine dependency requires meta-python2 to be present.')
+}
 
 SRC_URI = " \
     git://github.com/OSSystems/qt-kiosk-browser;protocol=https \

recipes-qt/qt5/qtwebengine_git.bb

@@ -79,10 +79,17 @@ COMPATIBLE_MACHINE_aarch64 = "(.*)"
 
 inherit qmake5
 inherit gettext
-inherit pythonnative
 inherit perlnative
 inherit features_check
 
+inherit ${@bb.utils.contains("BBFILE_COLLECTIONS", "meta-python2", "pythonnative", "", d)}
+
+python() {
+    if 'meta-python2' not in d.getVar('BBFILE_COLLECTIONS').split():
+        raise bb.parse.SkipRecipe('Requires meta-python2 to be present.')
+}
+
+
 # Static builds of QtWebEngine aren't supported.
 CONFLICT_DISTRO_FEATURES = "qt5-static"
 

recipes-qt/qt5/qtwebkit_git.bb

@@ -18,7 +18,14 @@ SRC_URI += "\
     file://0004-PlatformQt.cmake-Do-not-generate-hardcoded-include-p.patch \
 "
 
-inherit cmake_qt5 perlnative pythonnative
+inherit cmake_qt5 perlnative
+
+inherit ${@bb.utils.contains("BBFILE_COLLECTIONS", "meta-python2", "pythonnative", "", d)}
+
+python() {
+    if 'meta-python2' not in d.getVar('BBFILE_COLLECTIONS').split():
+        raise bb.parse.SkipRecipe('Requires meta-python2 to be present.')
+}
 
 # qemuarm build fails with:
 # | {standard input}: Assembler messages: