fix mysql permissions (#2388)

CHANGELOG.md

@@ -11,6 +11,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix transcoding content with bt709/pc color metadata
 - Fix scripted schedule validation (file exists) when creating or editing playout
 - Fix adding single episode, movie, season, show to empty playlists
+- Fix startup with MySql as non-superuser
+  - `local_infile=ON` is required when using MySQL (for bulk inserts when building playouts)
+  - ETV will set this automatically when it has permission
+  - When ETV does not have permission, startup will fail with logged instructions on how to configure MySql
 
 ### Changed
 - **BREAKING CHANGE**: change how `Scripted Schedule` system works

ErsatzTV.Infrastructure/Data/DbInitializer.cs

@@ -15,7 +15,27 @@ public static class DbInitializer
         }
         else
         {
-            await context.Connection.ExecuteAsync("SET GLOBAL local_infile = true", cancellationToken);
+            int localInfile = await context.Connection.ExecuteScalarAsync<int>(
+                "SELECT @@GLOBAL.local_infile");
+
+            if (localInfile == 0)
+            {
+                try
+                {
+                    await context.Connection.ExecuteAsync("SET GLOBAL local_infile = 'ON'", cancellationToken);
+                }
+                catch
+                {
+                    Serilog.Log.Fatal(
+                        """
+                        ErsatzTV requires local_infile=ON when using MySQL.
+                        Please run the following as a MySQL administrator:
+                          SET GLOBAL local_infile = 'ON';
+                        Or configure it in my.cnf under [mysqld].
+                        """);
+                    throw;
+                }
+            }
         }
 
         if (!context.LanguageCodes.Any())