Fix failing sqlite VerifyMigrationTask with Hsql

sqldelight-gradle-plugin/src/main/kotlin/app/cash/sqldelight/gradle/VerifyMigrationTask.kt

@@ -113,6 +113,7 @@ abstract class VerifyMigrationTask : SqlDelightWorkerTask() {
     }
 
     override fun execute() {
+      if (!environment.dialect.isSqlite) return
       parameters.workingDirectory.get().asFile.deleteRecursively()
 
       val catalog = createCurrentDb()

sqldelight-gradle-plugin/src/test/kotlin/app/cash/sqldelight/tests/MigrationTest.kt

@@ -27,6 +27,15 @@ class MigrationTest {
     assertThat(output.output).contains("BUILD SUCCESSFUL")
   }
 
+  @Test fun `verification disabled succeeds with hsql dialect`() {
+    val output = GradleRunner.create()
+      .withCommonConfiguration(File("src/test/verify-migration-disabled-no-errors"))
+      .withArguments("clean", "verifyMainDatabaseMigration", "--stacktrace")
+      .build()
+
+    assertThat(output.output).contains("BUILD SUCCESSFUL")
+  }
+
   @Test fun `failing migration errors properly`() {
     val output = GradleRunner.create()
       .withCommonConfiguration(File("src/test/migration-failure"))

sqldelight-gradle-plugin/src/test/verify-migration-disabled-no-errors/build.gradle

@@ -0,0 +1,21 @@
+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 {
+  Database {
+    packageName = "com.example"
+    dialect("app.cash.sqldelight:hsql-dialect:${app.cash.sqldelight.VersionKt.VERSION}")
+    verifyMigrations = false
+  }
+}

sqldelight-gradle-plugin/src/test/verify-migration-disabled-no-errors/settings.gradle

@@ -0,0 +1,3 @@
+apply from: "../settings.gradle"
+
+rootProject.name = 'sqldelight-migrations'

sqldelight-gradle-plugin/src/test/verify-migration-disabled-no-errors/src/main/sqldelight/example/Foo.sq

@@ -0,0 +1,3 @@
+CREATE TABLE foo(
+bar BIGINT PRIMARY KEY AUTO_INCREMENT GENERATED ALWAYS AS IDENTITY
+);