feat: Add support for wasm when using in-memory-only sqlite database

Author: scottmarchant

.github/workflows/test.yml

@@ -16,6 +16,8 @@ jobs:
   unit-tests:
     uses: vapor/ci/.github/workflows/run-unit-tests.yml@main
     secrets: inherit
+    with:
+      with_wasm: true
 
   # Make sure downstream dependents still work
   dependents-check:

Package@swift-5.9.swift

@@ -13,16 +13,24 @@ let package = Package(
         .library(name: "SQLiteKit", targets: ["SQLiteKit"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/apple/swift-nio.git", from: "2.65.0"),
-        .package(url: "https://github.com/vapor/sqlite-nio.git", from: "1.9.0"),
-        .package(url: "https://github.com/vapor/sql-kit.git", from: "3.29.3"),
-        .package(url: "https://github.com/vapor/async-kit.git", from: "1.19.0"),
+        // TODO: SM: Update swift-nio version once NIOAsyncRuntime is available from swift-nio
+        // .package(url: "https://github.com/apple/swift-nio.git", from: "2.89.0"),
+        .package(url: "https://github.com/PassiveLogic/swift-nio.git", branch: "feat/addNIOAsyncRuntimeForWasm"),
+
+        // TODO: SM: Update below once everything is merged and release to the proper repositories
+//        .package(url: "https://github.com/vapor/sqlite-nio.git", from: "1.9.0"),
+        .package(url: "https://github.com/PassiveLogic/sqlite-nio.git", branch: "feat/swift-wasm-support-v2"),
+        .package(url: "https://github.com/vapor/sql-kit.git", from: "3.33.1"),
+//        .package(url: "https://github.com/vapor/async-kit.git", from: "1.19.0"),
+        .package(url: "https://github.com/PassiveLogic/async-kit.git", branch: "feat/swift-wasm-support-v2"),
     ],
     targets: [
         .target(
             name: "SQLiteKit",
             dependencies: [
                 .product(name: "NIOFoundationCompat", package: "swift-nio"),
+                .product(name: "NIOAsyncRuntime", package: "swift-nio", condition: .when(platforms: [.wasi])),
+                .product(name: "NIOPosix", package: "swift-nio"),
                 .product(name: "AsyncKit", package: "async-kit"),
                 .product(name: "SQLiteNIO", package: "sqlite-nio"),
                 .product(name: "SQLKit", package: "sql-kit"),

Sources/SQLiteKit/SQLiteConnectionSource.swift

@@ -5,6 +5,10 @@ import Foundation
 #endif
 import Logging
 import AsyncKit
+#if canImport(NIOAsyncRuntime)
+import NIOAsyncRuntime
+public typealias NIOThreadPool = AsyncThreadPool
+#endif
 import NIOPosix
 import SQLiteNIO
 import NIOCore
@@ -16,7 +20,13 @@ public struct SQLiteConnectionSource: ConnectionPoolSource, Sendable {
     private let threadPool: NIOThreadPool
 
     private var connectionStorage: SQLiteConnection.Storage {
+        #if os(WASI)
+        // NOTE: For WASI platforms, file urls and paths cause runtime errors currently. Using
+        // in-memory connection only as a workaround.
+        .memory
+        #else
         .file(path: self.actualURL.absoluteString)
+        #endif
     }
 
     /// Create a new ``SQLiteConnectionSource``.

Tests/SQLiteKitTests/SQLiteKitTests.swift

@@ -124,6 +124,11 @@ final class SQLiteKitTests: XCTestCase {
         XCTAssertEqual(bar.baz, "qux")
     }
 
+    // NOTE: The following test doesn't work in a runtime environment
+    // due to reliance on temp files. The test is elided for now
+    // for WASI targets, but could be used in the future once
+    // a persistence solution is working for WASI platforms.
+    #if !os(WASI)
     func testMultipleInMemoryDatabases() async throws {
         let a = SQLiteConnectionSource(
             configuration: .init(storage: .memory, enableForeignKeys: true),
@@ -149,6 +154,7 @@ final class SQLiteKitTests: XCTestCase {
         try! await a2.close().get()
         try! await a1.close().get()
     }
+    #endif  // !os(WASI)
 
     // https://github.com/vapor/sqlite-kit/issues/56
     func testDoubleConstraintError() async throws {