fix(migrate): Skip moving cache directory if it does not exist

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - `create-config` would fail with `--path` specified.
+- `migrate` no longer fails if the `cache` directory does not exist.
 
 ## [2.1.1] - 2022-05-29
 

src/Recyclarr.Tests/Migration/Steps/MigrateTrashUpdaterAppDataDirTest.cs

@@ -1,6 +1,7 @@
 using System.IO.Abstractions.TestingHelpers;
 using AutoFixture.NUnit3;
 using FluentAssertions;
+using NSubstitute;
 using NUnit.Framework;
 using Recyclarr.Migration.Steps;
 using TestLibrary;
@@ -12,8 +13,6 @@ namespace Recyclarr.Tests.Migration.Steps;
 [Parallelizable(ParallelScope.All)]
 public class MigrateTrashUpdaterAppDataDirTest
 {
-    private const string BasePath = "base_path";
-
     [Test, AutoMockData]
     public void Migration_check_returns_true_if_trash_updater_dir_exists(
         [Frozen(Matching.ImplementedInterfaces)] MockFileSystem fs,
@@ -33,12 +32,13 @@ public class MigrateTrashUpdaterAppDataDirTest
     }
 
     [Test, AutoMockData]
-    public void Migration_throws_if_recyclarr_dir_already_exists(
+    public void Migration_throws_if_recyclarr_yml_already_exists(
         [Frozen(Matching.ImplementedInterfaces)] MockFileSystem fs,
+        [Frozen(Matching.ImplementedInterfaces)] TestAppPaths paths,
         MigrateTrashUpdaterAppDataDir sut)
     {
-        fs.AddDirectory(Path.Combine(BasePath, "trash-updater"));
-        fs.AddDirectory(Path.Combine(BasePath, "recyclarr"));
+        fs.AddFileNoData($"{paths.BasePath}/trash-updater/recyclarr.yml");
+        fs.AddFileNoData($"{paths.BasePath}/recyclarr/recyclarr.yml");
 
         var act = () => sut.Execute(null);
 
@@ -67,4 +67,15 @@ public class MigrateTrashUpdaterAppDataDirTest
             FileUtils.NormalizePath($"/{paths.BasePath}/recyclarr/recyclarr.yml"),
             FileUtils.NormalizePath($"/{paths.BasePath}/recyclarr/cache/sonarr/test.txt"));
     }
+
+    [Test, AutoMockData]
+    public void No_exception_if_source_files_do_not_exist(
+        [Frozen(Matching.ImplementedInterfaces)] MockFileSystem fs,
+        [Frozen(Matching.ImplementedInterfaces)] TestAppPaths paths,
+        MigrateTrashUpdaterAppDataDir sut)
+    {
+        var act = () => sut.Execute(null);
+
+        act.Should().NotThrow();
+    }
 }

src/Recyclarr/Migration/Steps/MigrateTrashUpdaterAppDataDir.cs

@@ -44,15 +44,27 @@ public class MigrateTrashUpdaterAppDataDir : IMigrationStep
 
     public void Execute(IConsole? console)
     {
-        _fs.MergeDirectory(
-            _fs.Path.Combine(GetOldPath(), "cache"),
-            _fs.Path.Combine(GetNewPath(), "cache"),
-            console);
-
+        MoveDirectory("cache", console);
         MoveFile("recyclarr.yml");
         MoveFile("settings.yml");
 
-        _fs.Directory.Delete(GetOldPath(), true);
+        var oldDir = _fs.DirectoryInfo.FromDirectoryName(GetOldPath());
+        if (oldDir.Exists)
+        {
+            oldDir.Delete(true);
+        }
+    }
+
+    private void MoveDirectory(string directory, IConsole? console)
+    {
+        var oldPath = _fs.Path.Combine(GetOldPath(), directory);
+        if (_fs.Directory.Exists(oldPath))
+        {
+            _fs.MergeDirectory(
+                oldPath,
+                _fs.Path.Combine(GetNewPath(), directory),
+                console);
+        }
     }
 
     private void MoveFile(string file)