Always add an empty json file to MOC_JSON_FILES

This way the metatypes files are generated even if there are no metatypes in the module. This is necessary in order to generate empty QML modules, which in turn is useful if we only want e.g. URL interceptors in a module, but not types. Change-Id: Ief949cfebe831b69353a75d0da15ee347995051c Reviewed-by: Joerg Bornemann <[email protected]>
HoBoIs · Jun 9, 2020 · ef23645 · ef23645
1 parent db1de48
commit ef23645
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/mkspecs/features/metatypes.prf b/mkspecs/features/metatypes.prf
@@ -24,6 +24,15 @@ moc_json_source.depends = $${MOC_JSON_CPP_BASE}${QMAKE_FILE_BASE}$${QMAKE_EXT_CP
 moc_json_source.commands = $$escape_expand(\\n)  # force creation of rule
 moc_json_source.variable_out = MOC_JSON_FILES
 
+# Add an empty JSON file so that the moc_collect_json rule is executed even if there are no files
+# to run moc on.
+!build_pass {
+    MOC_EMPTY_JSON = "[]"
+    MOC_EMPTY_JSON_FILE = $$OUT_PWD/$${MOC_JSON_H_BASE}$${first(QMAKE_EXT_CPP)}.json
+    write_file($${MOC_EMPTY_JSON_FILE}, MOC_EMPTY_JSON)
+    MOC_JSON_FILES += $${MOC_EMPTY_JSON_FILE}
+}
+
 TARGET_BASENAME = $$lower($$basename(TARGET))
 TARGET_BASENAME ~= s/\s/_/g