Automatically create bookmarks folder for user (#3262)

* Automatically creates user bookmarks folder if it does not exist

data/assets/global/localbookmarks.asset

@@ -5,6 +5,11 @@ local bookmarkHelper = asset.require("util/generate_bookmarks")
 asset.require("scene/solarsystem/planets/earth/earth")
 
 local localBookmarks = openspace.absPath("${USER}/bookmarks/localbookmarks.csv")
+local bookmarksDirectory = openspace.absPath("${USER}/bookmarks")
+
+if not openspace.directoryExists(bookmarksDirectory) then
+  openspace.createDirectory(bookmarksDirectory)
+end
 
 -- Create bookmarks file if it does not exist
 if not openspace.fileExists(localBookmarks) then

src/scripting/scriptengine.cpp

@@ -646,6 +646,7 @@ void ScriptEngine::addBaseLibrary() {
             codegen::lua::FileExists,
             codegen::lua::ReadFile,
             codegen::lua::DirectoryExists,
+            codegen::lua::CreateDirectory,
             codegen::lua::WalkDirectory,
             codegen::lua::WalkDirectoryFiles,
             codegen::lua::WalkDirectoryFolders,

src/scripting/scriptengine_lua.inl

@@ -103,12 +103,28 @@ namespace {
     return contents;
 }
 
-// Checks whether the provided file exists.
+// Checks whether the provided directory exists.
 [[codegen::luawrap]] bool directoryExists(std::filesystem::path file) {
     const bool e = std::filesystem::is_directory(absPath(std::move(file)));
     return e;
 }
 
+/**
+ * Creates a directory at the provided path, returns true if directory was newly created
+ * and false otherwise. If `recursive` flag is set to true, it will automatically create
+ * any missing parent folder as well
+ */
+[[codegen::luawrap]] bool createDirectory(std::filesystem::path path,
+    bool recursive = false)
+{
+    if (recursive) {
+        return std::filesystem::create_directories(std::move(path));
+    }
+    else {
+        return std::filesystem::create_directory(std::move(path));
+    }
+}
+
 std::vector<std::filesystem::path> walkCommon(const std::filesystem::path& path,
                                               bool recursive, bool sorted,
                                  std::function<bool(const std::filesystem::path&)> filter)