Add qt5-translation.bbclass

As long as I am not brave enough to psuh this to meta-qt5 have a copy of
the version found in meta-qt5-extra here.

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

classes/qt5-translation.bbclass

@@ -0,0 +1,70 @@
+# translations -> locale packages
+
+DEPENDS += "qttools-native"
+
+# default location
+QT_TRANSLATION_FILES ??= "${datadir}/*/translations/*.qm ${datadir}/*/translations/*/*.qm ${datadir}/*/translations/*/*/*.qm"
+
+FILES_${PN}-locale = "${datadir}/*/translations"
+
+# remove ${datadir}/${BPN} set by bitbake.conf
+FILES_${PN}_remove = "${datadir}/${BPN}"
+
+python qt_do_split_locales() {
+    import glob
+
+    if (d.getVar('PACKAGE_NO_LOCALE', True) == '1'):
+        bb.debug(1, "package requested not splitting locales")
+        return
+
+    packages = (d.getVar('PACKAGES', True) or "").split()
+
+    datadir = d.getVar('datadir', True)
+    if not datadir:
+        bb.note("datadir not defined")
+        return
+
+    dvar = d.getVar('PKGD', True)
+    pn = d.getVar('LOCALEBASEPN', True)
+
+    if pn + '-locale' in packages:
+        packages.remove(pn + '-locale')
+
+    # extract locales from *.qm files into list in locales
+    locales = []
+    for transvar in d.getVar('QT_TRANSLATION_FILES', True).split():
+        translocation = '%s%s' % (dvar, transvar)
+        transfiles = glob.glob(translocation)
+        for l in sorted(transfiles):
+            lib, locale = os.path.basename(l.replace('.qm', '')).split("_",1)
+            if not locale in locales:
+                locales.append(locale)
+
+    if not locales:
+        bb.debug(1, "No locale files in this package")
+        return
+
+    summary = d.getVar('SUMMARY', True) or pn
+    description = d.getVar('DESCRIPTION', True) or ""
+    locale_section = d.getVar('LOCALE_SECTION', True)
+    mlprefix = d.getVar('MLPREFIX', True) or ""
+    for l in sorted(locales):
+        ln = legitimize_package_name(l)
+        pkg = pn + '-locale-' + ln
+        packages.append(pkg)
+        files = ''
+        for transvar in d.getVar('QT_TRANSLATION_FILES', True).split():
+            files = '%s %s' % (files, transvar.replace('*.qm', '*_%s.qm' % l))
+        d.setVar('FILES_' + pkg, files )
+        d.setVar('RRECOMMENDS_' + pkg, '%svirtual-locale-%s' % (mlprefix, ln))
+        d.setVar('RPROVIDES_' + pkg, '%s-locale %s%s-translation' % (pn, mlprefix, ln))
+        d.setVar('SUMMARY_' + pkg, '%s - %s translations' % (summary, l))
+        d.setVar('DESCRIPTION_' + pkg, '%s  This package contains language translation files for the %s locale.' % (description, l))
+        if locale_section:
+            d.setVar('SECTION_' + pkg, locale_section)
+
+    d.setVar('PACKAGES', ' '.join(packages))
+}
+
+PACKAGESPLITFUNCS_prepend = "qt_do_split_locales "
+