src: implemented move constructor/assignment for filepath

* improves indexing performance by roughly 5%
* switched to use uniqu_ptr for boost path to get rid of including boost in header
* added different methods to change the current FilePath or to make a copy and change that one
* used these methods appropriately throughout the code base
* removed exists() method from FileSystem because it is already contained in FilePath
* added const in some places

src/lib_java/project/SourceGroupJava.cpp

@@ -152,7 +152,7 @@ std::set<FilePath> SourceGroupJava::fetchRootDirectories()
 			continue;
 		}
 
-		FilePath rootPath = filePath.parentDirectory();
+		FilePath rootPath = filePath.getParentDirectory();
 		bool success = true;
 
 		const std::vector<std::string> packageNameParts = utility::splitToVector(packageName, ".");
@@ -163,7 +163,7 @@ std::set<FilePath> SourceGroupJava::fetchRootDirectories()
 				success = false;
 				break;
 			}
-			rootPath = rootPath.parentDirectory();
+			rootPath = rootPath.getParentDirectory();
 		}
 
 		if (success)

src/lib_java/project/SourceGroupJavaGradle.cpp

@@ -73,7 +73,7 @@ std::vector<FilePath> SourceGroupJavaGradle::getAllSourcePaths() const
 		std::shared_ptr<DialogView> dialogView = Application::getInstance()->getDialogView();
 		dialogView->showUnknownProgressDialog("Preparing Project", "Gradle\nFetching Source Directories");
 
-		const FilePath projectRootPath = m_settings->getGradleProjectFilePathExpandedAndAbsolute().parentDirectory();
+		const FilePath projectRootPath = m_settings->getGradleProjectFilePathExpandedAndAbsolute().getParentDirectory();
 		sourcePaths = utility::gradleGetAllSourceDirectories(projectRootPath, m_settings->getShouldIndexGradleTests());
 
 		dialogView->hideUnknownProgressDialog();
@@ -85,7 +85,7 @@ bool SourceGroupJavaGradle::prepareGradleData()
 {
 	if (m_settings && m_settings->getGradleProjectFilePathExpandedAndAbsolute().exists())
 	{
-		const FilePath projectRootPath = m_settings->getGradleProjectFilePathExpandedAndAbsolute().parentDirectory();
+		const FilePath projectRootPath = m_settings->getGradleProjectFilePathExpandedAndAbsolute().getParentDirectory();
 
 		std::shared_ptr<DialogView> dialogView = Application::getInstance()->getDialogView();
 

src/lib_java/project/SourceGroupJavaMaven.cpp

@@ -74,7 +74,7 @@ std::vector<FilePath> SourceGroupJavaMaven::getAllSourcePaths() const
 		dialogView->showUnknownProgressDialog("Preparing Project", "Maven\nFetching Source Directories");
 
 		const FilePath mavenPath(ApplicationSettings::getInstance()->getMavenPath());
-		const FilePath projectRootPath = m_settings->getMavenProjectFilePathExpandedAndAbsolute().parentDirectory();
+		const FilePath projectRootPath = m_settings->getMavenProjectFilePathExpandedAndAbsolute().getParentDirectory();
 		sourcePaths = utility::mavenGetAllDirectoriesFromEffectivePom(mavenPath, projectRootPath, m_settings->getShouldIndexMavenTests());
 
 		dialogView->hideUnknownProgressDialog();
@@ -87,7 +87,7 @@ bool SourceGroupJavaMaven::prepareMavenData()
 	if (m_settings && m_settings->getMavenProjectFilePathExpandedAndAbsolute().exists())
 	{
 		const FilePath mavenPath = ApplicationSettings::getInstance()->getMavenPath();
-		const FilePath projectRootPath = m_settings->getMavenProjectFilePathExpandedAndAbsolute().parentDirectory();
+		const FilePath projectRootPath = m_settings->getMavenProjectFilePathExpandedAndAbsolute().getParentDirectory();
 
 		std::shared_ptr<DialogView> dialogView = Application::getInstance()->getDialogView();
 		dialogView->showUnknownProgressDialog("Preparing Project", "Maven\nGenerating Source Files");

src/lib_java/utility/utilityGradle.cpp

@@ -19,7 +19,7 @@ namespace
 		if (getenv("JAVA_HOME") == nullptr)
 		{
 			const FilePath javaPath(ApplicationSettings::getInstance()->getJavaPath());
-			const FilePath javaHomePath = javaPath.parentDirectory().parentDirectory().parentDirectory();
+			const FilePath javaHomePath = javaPath.getParentDirectory().getParentDirectory().getParentDirectory();
 
 			LOG_WARNING("Environment variable \"JAVA_HOME\" not found on system. Setting value to \"" + javaHomePath.str() + "\" for this process.");
 

src/lib_java/utility/utilityMaven.cpp

@@ -39,7 +39,7 @@ namespace
 			FilePath path(fetchedDirectory);
 			if (!toAppend.empty())
 			{
-				path = path.concat(toAppend);
+				path.concatenate(toAppend);
 			}
 			pathList.push_back(path);
 			LOG_INFO("Found directory \"" + path.str() + "\".");
@@ -51,7 +51,7 @@ namespace
 		if (getenv("JAVA_HOME") == nullptr)
 		{
 			const FilePath javaPath(ApplicationSettings::getInstance()->getJavaPath());
-			const FilePath javaHomePath = javaPath.parentDirectory().parentDirectory().parentDirectory();
+			const FilePath javaHomePath = javaPath.getParentDirectory().getParentDirectory().getParentDirectory();
 
 			LOG_WARNING("Environment variable \"JAVA_HOME\" not found on system. Setting value to \"" + javaHomePath.str() + "\" for this process.");