Add encryption trait

.github/workflows/swift.yml

@@ -21,4 +21,6 @@ jobs:
     - name: Build
       run: swift build -v
     - name: Run tests
-      run: swift test -v
+      run: |
+        swift test -v
+        swift test -v --traits Encryption

Package.swift

@@ -1,18 +1,8 @@
-// swift-tools-version: 5.9
+// swift-tools-version: 6.1
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
-// Note: Keep in sync with https://github.com/powersync-ja/powersync-kotlin/blob/main/plugins/build-plugin/src/main/kotlin/com/powersync/compile/ClangCompile.kt
-let compileTimeOptions: [CSetting] = [
-    .define("HAVE_GETHOSTUUID", to: "0"),
-    .define("SQLITE_ENABLE_DBSTAT_VTAB"),
-    .define("SQLITE_ENABLE_FTS5"),
-    .define("SQLITE_ENABLE_SNAPSHOT"),
-    .define("SQLITE_ENABLE_SESSION"),
-    .define("SQLITE_ENABLE_PREUPDATE_HOOK")
-]
-
 let package = Package(
     name: "CSQLite",
     products: [
@@ -22,19 +12,26 @@ let package = Package(
             targets: ["CSQLite"]
         ),
     ],
+    traits: [
+        .trait(name: "Encryption"),
+    ],
     targets: [
         // Targets are the basic building blocks of a package, defining a module or a test suite.
         // Targets can depend on other targets in this package and products from dependencies.
         .target(
             name: "CSQLite",
-            cSettings: compileTimeOptions,
-            linkerSettings: [
-                .linkedLibrary("m")
-            ]
-        ),
-        .target(
-            name: "CSQLite3MultipleCiphers",
-            cSettings: compileTimeOptions,
+            exclude: ["_sqlite", "_sqlite3mc"],
+            cSettings: [
+                // Note: Keep in sync with https://github.com/powersync-ja/powersync-kotlin/blob/main/plugins/build-plugin/src/main/kotlin/com/powersync/compile/ClangCompile.kt
+                .define("HAVE_GETHOSTUUID", to: "0"),
+                .define("SQLITE_ENABLE_DBSTAT_VTAB"),
+                .define("SQLITE_ENABLE_FTS5"),
+                .define("SQLITE_ENABLE_SNAPSHOT"),
+                .define("SQLITE_ENABLE_SESSION"),
+                .define("SQLITE_ENABLE_PREUPDATE_HOOK"),
+
+                .define("USE_SQLITE3MC", .when(traits: ["Encryption"]))
+            ],
             linkerSettings: [
                 .linkedLibrary("m")
             ]

Sources/CSQLite/include/module.modulemap

@@ -1,4 +1,4 @@
 module CSQLite {
-	header "sqlite3.h"
+	header "sqlite3_entry.h"
 	export *
 }

Sources/CSQLite/include/sqlite3_entry.h

@@ -0,0 +1,5 @@
+#ifdef USE_SQLITE3MC
+#include "../_sqlite3mc/sqlite3.h"
+#else
+#include "../_sqlite/sqlite3.h"
+#endif

Sources/CSQLite/sqlite3_entry.c

@@ -0,0 +1,5 @@
+#ifdef USE_SQLITE3MC
+#include "_sqlite3mc/sqlite3mc_amalgamation.c"
+#else
+#include "_sqlite/sqlite3.c"
+#endif

Tests/CSQLiteTests/CSQLiteTests.swift

@@ -1,9 +1,27 @@
 import Testing
 @testable import CSQLite
 
+#if Encryption
+let encryption = true
+#else
+let encryption = false
+#endif
+
 @Test func smoke_test() throws {
     var db: OpaquePointer?
-    #expect(sqlite3_open_v2(":memory:", &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, nil) == SQLITE_OK)
+    try #require(sqlite3_open_v2(":memory:", &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, nil) == SQLITE_OK)
     #expect(sqlite3_close_v2(db) == SQLITE_OK)
     // Write your test here and use APIs like `#expect(...)` to check expected conditions.
 }
+
+@Test(.disabled(if: !encryption)) func links_sqlite3mc() throws {
+    var db: OpaquePointer?
+    try #require(sqlite3_open_v2(":memory:", &db, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, nil) == SQLITE_OK)
+
+    var stmt: OpaquePointer?
+    try #require(sqlite3_prepare_v2(db, "pragma cipher", 13, &stmt, nil) == SQLITE_OK)
+    try #require(sqlite3_step(stmt) == SQLITE_ROW)
+    let cipher = String(cString: sqlite3_column_text(stmt, 0))
+    #expect(cipher == "chacha20")
+    #expect(sqlite3_close_v2(db) == SQLITE_OK)
+}

download.sh

@@ -5,11 +5,11 @@ cd tmp
 curl -o amalgamation.zip -L https://github.com/utelle/SQLite3MultipleCiphers/releases/download/v2.2.6/sqlite3mc-2.2.6-sqlite-3.51.1-amalgamation.zip
 unzip amalgamation.zip
 
-mv sqlite3.h ../Sources/CSQLite/include/
-mv sqlite3.c ../Sources/CSQLite/
+mv sqlite3.h ../Sources/CSQLite/_sqlite/
+mv sqlite3.c ../Sources/CSQLite/_sqlite/
 
-mv sqlite3mc_amalgamation.h ../Sources/CSQLite3MultipleCiphers/include/sqlite3.h
-mv sqlite3mc_amalgamation.c ../Sources/CSQLite3MultipleCiphers/
+mv sqlite3mc_amalgamation.h ../Sources/CSQLite/_sqlite3mc/sqlite3.h
+mv sqlite3mc_amalgamation.c ../Sources/CSQLite/_sqlite3mc/
 
 cd ..
 rm -r tmp