4 files changed, 51 insertions, 3 deletions
diff --git a/core/io/resource_import.cpp b/core/io/resource_import.cpp
index 5a4f29fe67..69ff791a3a 100644
--- a/core/io/resource_import.cpp
+++ b/core/io/resource_import.cpp
@@ -32,13 +32,17 @@
 #include "os/os.h"
 #include "variant_parser.h"
 
-Error ResourceFormatImporter::_get_path_and_type(const String &p_path, PathAndType &r_path_and_type) const {
+Error ResourceFormatImporter::_get_path_and_type(const String &p_path, PathAndType &r_path_and_type, bool *r_valid) const {
 
 	Error err;
 	FileAccess *f = FileAccess::open(p_path + ".import", FileAccess::READ, &err);
 
-	if (!f)
+	if (!f) {
+		if (r_valid) {
+			*r_valid = false;
+		}
 		return err;
+	}
 
 	VariantParser::StreamFile stream;
 	stream.f = f;
@@ -47,6 +51,10 @@ Error ResourceFormatImporter::_get_path_and_type(const String &p_path, PathAndTy
 	Variant value;
 	VariantParser::Tag next_tag;
 
+	if (r_valid) {
+		*r_valid = true;
+	}
+
 	int lines = 0;
 	String error_text;
 	bool path_found = false; //first match must have priority
@@ -79,6 +87,10 @@ Error ResourceFormatImporter::_get_path_and_type(const String &p_path, PathAndTy
 				path_found = true; //first match must have priority
 			} else if (assign == "type") {
 				r_path_and_type.type = value;
+			} else if (assign == "valid") {
+				if (r_valid) {
+					*r_valid = value;
+				}
 			}
 
 		} else if (next_tag.name != "remap") {
@@ -245,6 +257,14 @@ void ResourceFormatImporter::get_internal_resource_path_list(const String &p_pat
 	memdelete(f);
 }
 
+bool ResourceFormatImporter::is_import_valid(const String &p_path) const {
+
+	bool valid = true;
+	PathAndType pat;
+	_get_path_and_type(p_path, pat, &valid);
+	return valid;
+}
+
 String ResourceFormatImporter::get_resource_type(const String &p_path) const {
 
 	PathAndType pat;
diff --git a/core/io/resource_import.h b/core/io/resource_import.h
index bf0bf3987a..b10255fbab 100644
--- a/core/io/resource_import.h
+++ b/core/io/resource_import.h
@@ -40,7 +40,7 @@ class ResourceFormatImporter : public ResourceFormatLoader {
 		String type;
 	};
 
-	Error _get_path_and_type(const String &p_path, PathAndType &r_path_and_type) const;
+	Error _get_path_and_type(const String &p_path, PathAndType &r_path_and_type, bool *r_valid = NULL) const;
 
 	static ResourceFormatImporter *singleton;
 
@@ -54,6 +54,7 @@ public:
 	virtual bool recognize_path(const String &p_path, const String &p_for_type = String()) const;
 	virtual bool handles_type(const String &p_type) const;
 	virtual String get_resource_type(const String &p_path) const;
+	virtual bool is_import_valid(const String &p_path) const;
 	virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
 
 	virtual bool can_be_imported(const String &p_path) const;
diff --git a/core/io/resource_loader.cpp b/core/io/resource_loader.cpp
index f0e804e2fa..30ae9f5681 100644
--- a/core/io/resource_loader.cpp
+++ b/core/io/resource_loader.cpp
@@ -296,6 +296,31 @@ void ResourceLoader::add_resource_format_loader(ResourceFormatLoader *p_format_l
 	}
 }
 
+bool ResourceLoader::is_import_valid(const String &p_path) {
+
+	String path = _path_remap(p_path);
+
+	String local_path;
+	if (path.is_rel_path())
+		local_path = "res://" + path;
+	else
+		local_path = ProjectSettings::get_singleton()->localize_path(path);
+
+	for (int i = 0; i < loader_count; i++) {
+
+		if (!loader[i]->recognize_path(local_path))
+			continue;
+		/*
+		if (p_type_hint!="" && !loader[i]->handles_type(p_type_hint))
+			continue;
+		*/
+
+		return loader[i]->is_import_valid(p_path);
+	}
+
+	return false; //not found
+}
+
 void ResourceLoader::get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types) {
 
 	String path = _path_remap(p_path);
diff --git a/core/io/resource_loader.h b/core/io/resource_loader.h
index 9e059c2977..91f0c939bf 100644
--- a/core/io/resource_loader.h
+++ b/core/io/resource_loader.h
@@ -66,6 +66,7 @@ public:
 	virtual String get_resource_type(const String &p_path) const = 0;
 	virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
 	virtual Error rename_dependencies(const String &p_path, const Map<String, String> &p_map) { return OK; }
+	virtual bool is_import_valid(const String &p_path) const { return true; }
 
 	virtual ~ResourceFormatLoader() {}
 };
@@ -104,6 +105,7 @@ public:
 	static String get_resource_type(const String &p_path);
 	static void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
 	static Error rename_dependencies(const String &p_path, const Map<String, String> &p_map);
+	static bool is_import_valid(const String &p_path);
 
 	static void set_timestamp_on_load(bool p_timestamp) { timestamp_on_load = p_timestamp; }