Always create the database implementation

sqldelight-compiler/src/main/kotlin/app/cash/sqldelight/core/SqlDelightEnvironment.kt

@@ -174,6 +174,7 @@ class SqlDelightEnvironment(
           output = writer,
           includeAll = true,
         )
+        SqlDelightCompiler.writeImplementations(module, migrationFile, moduleName, writer)
       }
       logger("----- END ${migrationFile.name} in $timeTaken ms ------")
     }

sqldelight-compiler/src/main/kotlin/app/cash/sqldelight/core/compiler/SqlDelightCompiler.kt

@@ -72,7 +72,7 @@ object SqlDelightCompiler {
 
   fun writeImplementations(
     module: Module,
-    sourceFile: SqlDelightQueriesFile,
+    sourceFile: SqlDelightFile,
     implementationFolder: String,
     output: FileAppender,
   ) {

sqldelight-gradle-plugin/src/test/derive-schema-no-queries/build.gradle

@@ -0,0 +1,26 @@
+buildscript {
+  apply from: "${projectDir.absolutePath}/../buildscript.gradle"
+}
+
+apply plugin: 'org.jetbrains.kotlin.jvm'
+apply plugin: 'app.cash.sqldelight'
+
+repositories {
+  maven {
+    url "file://${projectDir.absolutePath}/../../../../build/localMaven"
+  }
+  mavenCentral()
+}
+
+sqldelight {
+  NoQueries {
+    packageName = "app.cash.sqldelight.derive.schema.from.migrations.no.queries"
+    deriveSchemaFromMigrations = true
+  }
+}
+
+dependencies {
+  implementation libs.sqliteJdbc
+  implementation "app.cash.sqldelight:sqlite-driver:${app.cash.sqldelight.VersionKt.VERSION}"
+  implementation libs.truth
+}

sqldelight-gradle-plugin/src/test/derive-schema-no-queries/settings.gradle

@@ -0,0 +1,9 @@
+apply from: "../settings.gradle"
+
+rootProject.name = 'derive-schema-no-queries'
+
+buildCache {
+  local {
+    directory = new File(rootDir, 'build-cache')
+  }
+}

sqldelight-gradle-plugin/src/test/derive-schema-no-queries/src/main/sqldelight/app/cash/sqldelight/1.sqm

@@ -0,0 +1,5 @@
+CREATE TABLE person (
+  _id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+  first_name TEXT NOT NULL,
+  last_name TEXT NOT NULL
+);

sqldelight-gradle-plugin/src/test/derive-schema-no-queries/src/test/java/app/cash/sqldelight/integration/IntegrationTests.kt

@@ -0,0 +1,18 @@
+package app.cash.sqldelight.integration
+
+import app.cash.sqldelight.derive.schema.from.migrations.no.queries.NoQueries
+import app.cash.sqldelight.driver.jdbc.sqlite.JdbcSqliteDriver
+import org.junit.After
+import org.junit.Test
+import java.io.File
+
+class IntegrationTests {
+  @After fun after() {
+    File("test.db").delete()
+  }
+
+  @Test fun `creating db works without query files`() {
+    val database = JdbcSqliteDriver(JdbcSqliteDriver.IN_MEMORY)
+    NoQueries.Schema.create(database)
+  }
+}

sqldelight-gradle-plugin/src/test/kotlin/app/cash/sqldelight/integrations/IntegrationTest.kt

@@ -282,4 +282,13 @@ class IntegrationTest {
     val result = runner.build()
     assertThat(result.output).contains("BUILD SUCCESSFUL")
   }
+
+  @Test fun `deriveSchemaFromMigrations creates a db without queries`() {
+    val runner = GradleRunner.create()
+      .withCommonConfiguration(File("src/test/derive-schema-no-queries"))
+      .withArguments("clean", "build", "--stacktrace")
+
+    val result = runner.build()
+    assertThat(result.output).contains("BUILD SUCCESSFUL")
+  }
 }