when a fatal crash happens, keep a copy of the log and notify the player on relaunch

2 files changed, 27 insertions, 1 deletions

diff --git a/src/StardewModdingAPI/Constants.cs b/src/StardewModdingAPI/Constants.cs
index 1860795d..1d6c9fa1 100644
--- a/src/StardewModdingAPI/Constants.cs
+++ b/src/StardewModdingAPI/Constants.cs
@@ -71,6 +71,12 @@ namespace StardewModdingAPI
         /// <summary>The file path to the log where the latest output should be saved.</summary>
         internal static string DefaultLogPath => Path.Combine(Constants.LogDir, "SMAPI-latest.txt");
 
+        /// <summary>A copy of the log leading up to the previous fatal crash, if any.</summary>
+        internal static string FatalCrashLog => Path.Combine(Constants.LogDir, "SMAPI-crash.txt");
+
+        /// <summary>The file path which stores a fatal crash message for the next run.</summary>
+        internal static string FatalCrashMarker => Path.Combine(Constants.ExecutionPath, "StardewModdingAPI.crash.marker");
+
         /// <summary>The full path to the folder containing mods.</summary>
         internal static string ModPath { get; } = Path.Combine(Constants.ExecutionPath, "Mods");
 
diff --git a/src/StardewModdingAPI/Program.cs b/src/StardewModdingAPI/Program.cs
index aa78ff41..725ac94f 100644
--- a/src/StardewModdingAPI/Program.cs
+++ b/src/StardewModdingAPI/Program.cs
@@ -154,7 +154,16 @@ namespace StardewModdingAPI
                     this.CancellationTokenSource.Token.WaitHandle.WaitOne();
                     if (this.IsGameRunning)
                     {
-                        this.GameInstance.Exiting += (sender, e) => this.PressAnyKeyToExit();
+                        try
+                        {
+                            File.WriteAllText(Constants.FatalCrashMarker, string.Empty);
+                            File.Copy(Constants.DefaultLogPath, Constants.FatalCrashLog, overwrite: true);
+                        }
+                        catch (Exception ex)
+                        {
+                            this.Monitor.Log($"SMAPI failed trying to track the crash details: {ex.GetLogSummary()}");
+                        }
+
                         this.GameInstance.Exit();
                     }
                 }).Start();
@@ -179,6 +188,17 @@ namespace StardewModdingAPI
                 return;
             }
 
+            // show details if game crashed during last session
+            if (File.Exists(Constants.FatalCrashMarker))
+            {
+                this.Monitor.Log("The game crashed last time you played. That can be due to bugs in the game, but if it happens repeatedly you can ask for help here: http://community.playstarbound.com/threads/108375/.", LogLevel.Error);
+                this.Monitor.Log($"If you ask for help, make sure to attach this file: {Constants.FatalCrashLog}", LogLevel.Error);
+                this.Monitor.Log("Press any key to delete the crash data and continue playing.", LogLevel.Info);
+                Console.ReadKey();
+                File.Delete(Constants.FatalCrashLog);
+                File.Delete(Constants.FatalCrashMarker);
+            }
+
             // start game
             this.Monitor.Log("Starting game...");
             try