Support relative paths in Visual Studio projects properties (#995)

* transform relative paths with the help of the project dir to absolute
paths so the actual checker can resolve include paths defined in
property sheets

* fix coding style (one-line if)

* add existing importproject testfile to visual studio project to appear
when loading solution

* also explicitly export struct from within class to enable linking in
testrunner

lib/importproject.cpp

@@ -413,8 +413,14 @@ static void importPropertyGroup(const tinyxml2::XMLElement *node, std::map<std::
 static void loadVisualStudioProperties(const std::string &props, std::map<std::string,std::string,cppcheck::stricmp> *variables, std::string *includePath, const std::string &additionalIncludeDirectories, std::list<ItemDefinitionGroup> &itemDefinitionGroupList)
 {
     std::string filename(props);
+	// variables cant be resolved
     if (!simplifyPathWithVariables(filename, *variables))
         return;
+
+	// prepend project dir (if it exists) to transform relative paths into absolute ones
+	if (!Path::isAbsolute(filename) && variables->count("ProjectDir") > 0)
+		filename = Path::getAbsoluteFilePath(variables->at("ProjectDir") + filename);
+
     tinyxml2::XMLDocument doc;
     if (doc.LoadFile(filename.c_str()) != tinyxml2::XML_SUCCESS)
         return;

lib/importproject.h

@@ -48,7 +48,7 @@ namespace cppcheck {
 class CPPCHECKLIB ImportProject {
 public:
     /** File settings. Multiple configurations for a file is allowed. */
-    struct FileSettings {
+    struct CPPCHECKLIB FileSettings {
         FileSettings() : platformType(cppcheck::Platform::Unspecified), msc(false), useMfc(false) {}
         std::string cfg;
         std::string filename;

test/testrunner.vcxproj

@@ -45,6 +45,7 @@
     <ClCompile Include="testexceptionsafety.cpp" />
     <ClCompile Include="testfilelister.cpp" />
     <ClCompile Include="testgarbage.cpp" />
+    <ClCompile Include="testimportproject.cpp" />
     <ClCompile Include="testincompletestatement.cpp" />
     <ClCompile Include="testinternal.cpp" />
     <ClCompile Include="testio.cpp" />

test/testrunner.vcxproj.filters

@@ -199,6 +199,9 @@
     <ClCompile Include="testfunctions.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="testimportproject.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="options.h">