Probable fix for # 55 (OneDrive url issue)

Sources/LocalHelper.swift

@@ -19,7 +19,7 @@ public final class LocalFileObject: FileObject {
         var fileURL: URL?
         var rpath = path.replacingOccurrences(of: relativeURL?.path ?? "", with: "", options: .anchored)
         if relativeURL != nil && rpath.hasPrefix("/") {
-            rpath.remove(at: rpath.startIndex)
+            _=rpath.characters.removeFirst()
         }
         if #available(iOS 9.0, macOS 10.11, tvOS 9.0, *) {
             fileURL = URL(fileURLWithPath: rpath, relativeTo: relativeURL)

Sources/OneDriveFileProvider.swift

@@ -213,16 +213,18 @@ open class OneDriveFileProvider: FileProviderBasicRemote {
             rpath = self.currentPath
         }
         
+        let driveURL = baseURL!.appendingPathComponent("drive/\(drive):/")
+        
         if rpath.hasPrefix("/") {
-            rpath.remove(at: rpath.startIndex)
+            _=rpath.characters.removeFirst()
         }
         if rpath.isEmpty {
             if let modifier = modifier {
-                return baseURL!.appendingPathComponent("drive/\(drive)/\(modifier)")
+                return driveURL.appendingPathComponent(modifier)
             }
-            return baseURL!.appendingPathComponent("drive/\(drive)")
+            return driveURL
         }
-        let driveURL = baseURL!.appendingPathComponent("drive/\(drive):/")
+        
         rpath = (rpath.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? rpath)
         rpath = rpath.trimmingCharacters(in: pathTrimSet)
         if let modifier = modifier {
@@ -247,7 +249,6 @@ open class OneDriveFileProvider: FileProviderBasicRemote {
 
 extension OneDriveFileProvider: FileProviderOperations {
     
-    
     open func create(folder folderName: String, at atPath: String, completionHandler: SimpleCompletionHandler) -> OperationHandle? {
         let path = (atPath as NSString).appendingPathComponent(folderName) + "/"
         return doOperation(.create(path: path), completionHandler: completionHandler)

Sources/OneDriveHelper.swift

@@ -20,7 +20,7 @@ public final class OneDriveFileObject: FileObject {
     internal init(baseURL: URL?, name: String, path: String) {
         var rpath = path.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? path
         if rpath.hasPrefix("/") {
-            rpath.remove(at: rpath.startIndex)
+            _=rpath.characters.removeFirst()
         }
         let url = URL(string: rpath, relativeTo: baseURL) ?? URL(string: rpath)!
         super.init(url: url, name: name, path: path)