Add support for sqlite

.gitignore

@@ -29,3 +29,5 @@ HELP.md
 .vscode/
 .gradle
 *.sql
+
+twigs.db

app/src/main/kotlin/com/wbrawner/twigs/server/Application.kt

@@ -23,6 +23,7 @@ import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import kotlinx.serialization.json.Json
 import org.slf4j.LoggerFactory
+import java.lang.RuntimeException
 import java.util.concurrent.TimeUnit
 
 fun main(args: Array<String>): Unit = io.ktor.server.cio.EngineMain.main(args)
@@ -30,13 +31,25 @@ fun main(args: Array<String>): Unit = io.ktor.server.cio.EngineMain.main(args)
 private const val DATABASE_VERSION = 3
 
 fun Application.module() {
+    val dbType = environment.config.propertyOrNull("twigs.database.type")?.getString() ?: "sqlite"
     val dbHost = environment.config.propertyOrNull("twigs.database.host")?.getString() ?: "localhost"
     val dbPort = environment.config.propertyOrNull("twigs.database.port")?.getString() ?: "5432"
     val dbName = environment.config.propertyOrNull("twigs.database.name")?.getString() ?: "twigs"
     val dbUser = environment.config.propertyOrNull("twigs.database.user")?.getString() ?: "twigs"
     val dbPass = environment.config.propertyOrNull("twigs.database.password")?.getString() ?: "twigs"
-    val jdbcUrl = "jdbc:postgresql://$dbHost:$dbPort/$dbName?stringtype=unspecified"
-    (LoggerFactory.getLogger("com.zaxxer.hikari") as ch.qos.logback.classic.Logger).level = Level.ERROR
+    val jdbcUrl = when (dbType) {
+        "postgresql" -> {
+            "jdbc:$dbType://$dbHost:$dbPort/$dbName?stringtype=unspecified"
+        }
+        "sqlite" -> {
+            Class.forName("org.sqlite.JDBC")
+            "jdbc:$dbType:$dbName"
+        }
+        else -> {
+            throw RuntimeException("Unsupported DB type: $dbType")
+        }
+    }
+    (LoggerFactory.getLogger("com.zaxxer.hikari") as ch.qos.logback.classic.Logger).level = Level.DEBUG
     HikariDataSource(HikariConfig().apply {
         setJdbcUrl(jdbcUrl)
         username = dbUser

app/src/main/resources/application.conf

@@ -10,15 +10,11 @@ ktor {
 
 twigs {
     database {
-        host = localhost
         host = ${?TWIGS_DB_HOST}
-        port = 5432
         port = ${?TWIGS_DB_PORT}
-        name = twigs
+        name = twigs.db
         name = ${?TWIGS_DB_NAME}
-        user = twigs
         user = ${?TWIGS_DB_USER}
-        password = twigs
         password = ${?TWIGS_DB_PASS}
     }
     password {

db/build.gradle.kts

@@ -8,7 +8,8 @@ val ktorVersion: String by rootProject.extra
 dependencies {
     implementation(kotlin("stdlib"))
     api(project(":storage"))
-    implementation(libs.postgres)
+    runtimeOnly(libs.postgres)
+    runtimeOnly(libs.sqlite)
     api(libs.hikari)
     implementation(libs.logback)
     testImplementation(libs.junit.jupiter.api)

db/src/main/kotlin/com/wbrawner/twigs/db/MetadataRepository.kt

@@ -15,6 +15,7 @@ class MetadataRepository(dataSource: DataSource) :
             .getResource("/sql/$toVersion.sql")
             ?.readText()
             ?.split(";")
+            ?.filterNot { it.isBlank() }
             ?: throw Error("No migration found for version $toVersion")
         dataSource.connection.use { conn ->
             queries.forEach { query ->

gradle/libs.versions.toml

@@ -7,8 +7,9 @@ kotlinx-coroutines = "1.6.2"
 ktor = "2.0.2"
 logback = "1.2.11"
 mail = "1.6.2"
-postgres = "42.3.4"
+postgres = "42.3.8"
 shadow = "7.0.0"
+sqlite = "3.42.0.0"
 
 [libraries]
 bcrypt = { module = "at.favre.lib:bcrypt", version.ref = "bcrypt" }
@@ -30,6 +31,7 @@ ktor-server-sessions = { module = "io.ktor:ktor-server-sessions", version.ref =
 logback = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
 mail = { module = "com.sun.mail:javax.mail", version.ref = "mail" }
 postgres = { module = "org.postgresql:postgresql", version.ref = "postgres" }
+sqlite = { module = "org.xerial:sqlite-jdbc", version.ref = "sqlite" }
 
 [bundles]
 ktor-server = [