Merge pull request #208 from Shivansps/mod-install-rework-1

Search other mod versions for files instead of download

Knossos.NET/Classes/HardLink.cs

@@ -0,0 +1,81 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+
+
+namespace Knossos.NET.Classes
+{
+    /// <summary>
+    /// Helper class to create file Hardlinks in Windows, Linux and MacOS
+    /// </summary>
+    public static class HardLink
+    {
+        /// <summary>
+        /// Creates a file HardLink
+        /// Cross-Platform
+        /// Note: It only works with files, not folders
+        /// </summary>
+        /// <param name="origin"></param>
+        /// <param name="destination"></param>
+        /// <returns>true if successfull, false otherwise</returns>
+        public static bool CreateFileLink(string origin, string destination)
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                return CreateWindowsLink(origin, destination);
+            }
+            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+            {
+                return CreateUnixLink(origin, destination);
+            }
+            return false;
+        }
+
+        private static bool CreateWindowsLink(string origin, string destination)
+        {
+            try
+            {
+                if (CreateHardLinkWindows(destination, origin))
+                    return true;
+
+                //Fail, throw exception
+                int hR = Marshal.GetHRForLastWin32Error();
+                var inner = Marshal.GetExceptionForHR(hR);
+                throw new IOException("Error while creating hardlink: " + inner);
+            }
+            catch (Exception ex)
+            {
+                //Log exception
+                Log.Add(Log.LogSeverity.Error, "Hardlink.CreateWindowsLink()", ex);
+            }
+            return false;
+        }
+
+        private static bool CreateUnixLink(string origin, string destination)
+        {
+            try
+            {
+                int ret = CreateHardLinkUnix(origin, destination);
+                if (ret == 0)
+                    return true;
+
+                //Fail, throw exception
+                int hR = Marshal.GetHRForLastWin32Error();
+                var inner = Marshal.GetExceptionForHR(hR);
+                throw new IOException("Error while creating hardlink: " + inner);
+            }
+            catch (Exception ex)
+            {
+                //Log exception
+                Log.Add(Log.LogSeverity.Error, "Hardlink.CreateUnixLink()", ex);
+            }
+            return false;
+        }
+
+        [DllImport("kernel32.dll", EntryPoint = "CreateHardLink", CharSet = CharSet.Unicode, SetLastError = true)]
+        private static extern bool CreateHardLinkWindows(string dest, string org, int flags = 0);
+
+        [DllImport("libc", EntryPoint = "link", CharSet = CharSet.Ansi, SetLastError = true)]
+        private static extern int CreateHardLinkUnix(string org, string dest);
+    }
+}

Knossos.NET/ViewModels/TaskViewModel.cs

@@ -299,7 +299,7 @@ await Dispatcher.UIThread.InvokeAsync(async () =>
         /// <param name="mod"></param>
         /// <param name="reinstallPkgs"></param>
         /// <param name="manualCompress"></param>
-        public async void InstallMod(Mod mod, List<ModPackage>? reinstallPkgs = null, bool manualCompress = false, bool cleanupOldVersions = false)
+        public async void InstallMod(Mod mod, List<ModPackage>? reinstallPkgs = null, bool manualCompress = false, bool cleanupOldVersions = false, bool cleanInstall = false, bool allowHardlinks = true)
         {
             if (Knossos.GetKnossosLibraryPath() == null)
             {
@@ -325,7 +325,7 @@ await Dispatcher.UIThread.InvokeAsync(async () =>
                         TaskList.Add(newTask);
                         taskQueue.Enqueue(newTask);
                     });
-                    await newTask.InstallMod(mod, cancelSource, reinstallPkgs, manualCompress, cleanupOldVersions).ConfigureAwait(false);
+                    await newTask.InstallMod(mod, cancelSource, reinstallPkgs, manualCompress, cleanupOldVersions, cleanInstall, allowHardlinks).ConfigureAwait(false);
                 }
             }
         }