logic: Implemented usage of PCH for indexing EmptyCxx Source Groups

* further change: initialize all llvm targets before indexing
* further change: remove configurable dependencies directory from gradle and maven sourcegroups

src/lib/utility/utilityFile.cpp

@@ -66,6 +66,45 @@ std::vector<FilePath> utility::getTopLevelPaths(const std::set<FilePath>& paths)
 	return topLevelPaths;
 }
 
+FilePath utility::getExpandedPath(const FilePath& path)
+{
+	std::vector<FilePath> paths = path.expandEnvironmentVariables();
+	if (!paths.empty())
+	{
+		if (paths.size() > 1)
+		{
+			LOG_WARNING(
+				L"Environment variable in path \"" + path.wstr() + L"\" has been expanded to " + std::to_wstring(paths.size()) +
+				L"paths, but only \"" + paths.front().wstr() + L"\" will be used."
+			);
+		}
+		return paths.front();
+	}
+	return FilePath();
+}
+
+std::vector<FilePath> utility::getExpandedPaths(const std::vector<FilePath>& paths)
+{
+	std::vector<FilePath> expanedPaths;
+	for (const FilePath& path : paths)
+	{
+		utility::append(expanedPaths, path.expandEnvironmentVariables());
+	}
+	return expanedPaths;
+}
+
+FilePath utility::getExpandedAndAbsolutePath(const FilePath& path, const FilePath& baseDirectory)
+{
+	FilePath p = getExpandedPath(path);
+
+	if (p.empty() || p.isAbsolute())
+	{
+		return p;
+	}
+
+	return baseDirectory.getConcatenated(p).makeCanonical();
+}
+
 FilePath utility::getAsRelativeIfShorter(const FilePath& absolutePath, const FilePath& baseDirectory)
 {
 	if (!baseDirectory.empty())

src/lib/utility/utilityFile.h

@@ -13,6 +13,9 @@ namespace utility
 	std::vector<FilePath> getTopLevelPaths(const std::vector<FilePath>& paths);
 	std::vector<FilePath> getTopLevelPaths(const std::set<FilePath>& paths);
 
+	FilePath getExpandedPath(const FilePath& path);
+	std::vector<FilePath> getExpandedPaths(const std::vector<FilePath>& paths);
+	FilePath getExpandedAndAbsolutePath(const FilePath& path, const FilePath& baseDirectory);
 	FilePath getAsRelativeIfShorter(const FilePath& absolutePath, const FilePath& baseDirectory);
 	std::vector<FilePath> getAsRelativeIfShorter(const std::vector<FilePath>& absolutePaths, const FilePath& baseDirectory);
 }