Optimize prepared asset package v2

tests/AcDream.Launcher.Core.Tests/Installation/ContentMigrationCatalogTests.cs

@@ -0,0 +1,29 @@
+using AcDream.Launcher.Core.Installation;
+
+namespace AcDream.Launcher.Core.Tests.Installation;
+
+public sealed class ContentMigrationCatalogTests
+{
+    [Fact]
+    public void RecipeFiveToSixRequiresOneExplicitFullRebuild()
+    {
+        ContentMigrationPlan plan = ContentMigrationCatalog.Resolve(5, 6);
+
+        Assert.Equal(ContentWorkKind.FullRebuild, plan.Kind);
+        Assert.Equal(5u, plan.FromRecipeVersion);
+        Assert.Equal(6u, plan.TargetRecipeVersion);
+        Assert.Contains("pak v2", plan.Reason, StringComparison.OrdinalIgnoreCase);
+        Assert.Empty(plan.EffectiveDatIds);
+        Assert.Empty(plan.EffectiveLandblocks);
+    }
+
+    [Fact]
+    public void AnyOlderRecipeToSixCollapsesToOneFullRebuild()
+    {
+        ContentMigrationPlan plan = ContentMigrationCatalog.Resolve(1, 6);
+
+        Assert.Equal(ContentWorkKind.FullRebuild, plan.Kind);
+        Assert.Equal(6u, plan.TargetRecipeVersion);
+        Assert.Contains("pak v2", plan.Reason, StringComparison.OrdinalIgnoreCase);
+    }
+}

tests/AcDream.Launcher.Core.Tests/Installation/LauncherContentStateStoreTests.cs

@@ -133,7 +133,7 @@ public sealed class LauncherContentStateStoreTests : IDisposable
         Directory.CreateDirectory(Path.GetDirectoryName(path)!);
         byte[] bytes = new byte[64];
         BinaryPrimitives.WriteUInt32LittleEndian(bytes.AsSpan(0, 4), 0x4B504341u);
-        BinaryPrimitives.WriteUInt32LittleEndian(bytes.AsSpan(4, 4), 1);
+        BinaryPrimitives.WriteUInt32LittleEndian(bytes.AsSpan(4, 4), 2);
         BinaryPrimitives.WriteUInt32LittleEndian(bytes.AsSpan(8, 4), 100);
         BinaryPrimitives.WriteUInt32LittleEndian(bytes.AsSpan(12, 4), 200);
         BinaryPrimitives.WriteUInt32LittleEndian(bytes.AsSpan(16, 4), 300);

tests/AcDream.Launcher.Core.Tests/Installation/LauncherInstallerTests.cs

@@ -147,6 +147,33 @@ public sealed class LauncherInstallerTests : IDisposable
             StringComparison.Ordinal);
     }
 
+    [Fact]
+    public async Task InsufficientFreeSpaceStopsBeforeBakeAndReportsExactRequirement()
+    {
+        bool childStarted = false;
+        var runner = new FakeBakeProcessRunner((_, _, _) =>
+        {
+            childStarted = true;
+            return Task.FromResult(new BakeProcessResult(0, string.Empty));
+        });
+        var installer = new LauncherInstaller(
+            _paths,
+            _bakeExecutable,
+            processRunner: runner,
+            availableFreeSpace: _ =>
+                LauncherInstaller.FullRebuildRequiredFreeBytes - 1);
+
+        LauncherInstallException error = await Assert.ThrowsAsync<LauncherInstallException>(
+            () => installer.InstallAsync(_dats, threads: 2));
+
+        Assert.False(childStarted);
+        Assert.Contains("2.0 GiB", error.Message, StringComparison.Ordinal);
+        Assert.Contains("active package", error.Message, StringComparison.Ordinal);
+        Assert.False(File.Exists(
+            LauncherInstaller.GetFullRebuildCandidatePath(
+                Path.Combine(_paths.DataDirectory, "pak", "acdream.pak"))));
+    }
+
     [Fact]
     public async Task FullContentMigrationPersistsClientGateAcrossLauncherRestart()
     {

tests/AcDream.Launcher.Core.Tests/Installation/LauncherOverlayInstallerTests.cs

@@ -58,8 +58,8 @@ public sealed class LauncherOverlayInstallerTests : IDisposable
                 request.OutputPath,
                 LauncherInstallRecordStore.CurrentBakeToolVersion);
             long bytes = new FileInfo(request.OutputPath).Length;
-            output($"{{\"v\":1,\"e\":\"started\",\"bakeToolVersion\":5}}\n");
-            output($"{{\"v\":1,\"e\":\"completed\",\"bakeToolVersion\":5,"
+            output($"{{\"v\":1,\"e\":\"started\",\"bakeToolVersion\":{LauncherInstallRecordStore.CurrentBakeToolVersion}}}\n");
+            output($"{{\"v\":1,\"e\":\"completed\",\"bakeToolVersion\":{LauncherInstallRecordStore.CurrentBakeToolVersion},"
                 + $"\"outputBytes\":{bytes},\"failures\":0}}\n");
             await Task.Yield();
             return new BakeProcessResult(0, string.Empty);
@@ -70,8 +70,8 @@ public sealed class LauncherOverlayInstallerTests : IDisposable
             recordStore: recordStore,
             processRunner: runner);
         var migration = new ContentMigrationPlan(
-            4,
-            5,
+            LauncherInstallRecordStore.CurrentBakeToolVersion - 1,
+            LauncherInstallRecordStore.CurrentBakeToolVersion,
             ContentWorkKind.Overlay,
             "bounded fixture update",
             [0x01001234u, 0x02005678u],
@@ -93,7 +93,9 @@ public sealed class LauncherOverlayInstallerTests : IDisposable
             observed.Arguments.SkipWhile(value => value != "--landblocks").Take(2));
         Assert.NotNull(result.Record.PreparedAssetOverlayPath);
         Assert.True(File.Exists(result.Record.PreparedAssetOverlayPath));
-        Assert.Equal(5u, result.Record.ResolvedBakeToolVersion);
+        Assert.Equal(
+            LauncherInstallRecordStore.CurrentBakeToolVersion,
+            result.Record.ResolvedBakeToolVersion);
         Assert.True(result.Record.RequiresClientCompatibilityConfirmation);
         Assert.False(File.Exists(
             new LauncherContentStateStore(_paths).OverlayCandidatePath));
@@ -145,7 +147,9 @@ public sealed class LauncherOverlayInstallerTests : IDisposable
             TaskCreationOptions.RunContinuationsAsynchronously);
         var runner = new FakeRunner(async (request, _, cancellationToken) =>
         {
-            LauncherContentStateStoreTests.WritePakHeader(request.OutputPath, 5);
+            LauncherContentStateStoreTests.WritePakHeader(
+                request.OutputPath,
+                LauncherInstallRecordStore.CurrentBakeToolVersion);
             entered.SetResult();
             await Task.Delay(Timeout.InfiniteTimeSpan, cancellationToken);
             return new BakeProcessResult(0, string.Empty);
@@ -160,8 +164,8 @@ public sealed class LauncherOverlayInstallerTests : IDisposable
             _dats,
             2,
             new ContentMigrationPlan(
-                4,
-                5,
+                LauncherInstallRecordStore.CurrentBakeToolVersion - 1,
+                LauncherInstallRecordStore.CurrentBakeToolVersion,
                 ContentWorkKind.Overlay,
                 "bounded fixture update",
                 [0x01001234u]),
@@ -189,11 +193,11 @@ public sealed class LauncherOverlayInstallerTests : IDisposable
     {
         LauncherContentStateStoreTests.WritePakHeader(
             recordStore.PreparedAssetPath,
-            recipe: 4);
+            recipe: LauncherInstallRecordStore.CurrentBakeToolVersion - 1);
         LauncherInstallRecord baseRecord =
             await LauncherContentStateStoreTests.RecordAsync(
                 recordStore.PreparedAssetPath,
-                recipe: 4,
+                recipe: LauncherInstallRecordStore.CurrentBakeToolVersion - 1,
                 datDirectory: Path.GetFullPath(_dats));
         Directory.CreateDirectory(_paths.DataDirectory);
         await File.WriteAllTextAsync(