chore: upgrade Gradle, Kotlin, Ktor, and all dependencies

- Gradle wrapper 8.9 → 8.14.4
- Kotlin 2.0.20 → 2.3.10
- Ktor 3.0.0-rc-1 → 3.4.0 (stable)
- Dagger 2.51 → 2.59.1, migrate KAPT → KSP
- kotlinx-serialization-json 1.6.3 → 1.10.0
- Logback 1.3.15 → 1.5.29 (1.3.x was EOL)
- JUnit 5.10.3 → 5.14.2, MockK 1.13.12 → 1.14.9
- foojay-resolver 0.8.0 → 1.0.0
- Fix duplicate ktor-serialization-kotlinx-json dependency
- Fix deprecated buildDir usage
- Docker builder image gradle:9.0 → gradle:8.13

Author: d4rken

Dockerfile

@@ -1,9 +1,4 @@
-FROM gradle:9.0 AS builder
-# ^ 2 Critical, 4 High, 23 Medium, 4 Low vulnerabilities (04.12.2025)
-# gradle 8.9, 8.10, 8.11, 8.12, 8.13 and 9.0 work
-# gradle 8.14 does nothing(doesn't build at all, no binary, no logs)
-# gradle 9.1 Fatal Errors due to some incompatability with jdk25
-# gradle 9.x with jdk21 does nothing, much like 8.14
+FROM gradle:8.13 AS builder
 WORKDIR /octi-sync-server
 
 # Copy Gradle wrapper files first for better caching

build.gradle.kts

@@ -1,11 +1,11 @@
 import java.io.ByteArrayOutputStream
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.3.10"
     application
-    kotlin("kapt") version "2.0.20"
-    kotlin("plugin.serialization") version "2.0.20"
-    id("io.ktor.plugin") version "3.0.0-rc-1"
+    id("com.google.devtools.ksp") version "2.3.5"
+    kotlin("plugin.serialization") version "2.3.10"
+    id("io.ktor.plugin") version "3.4.0"
 }
 
 group = "eu.darken"
@@ -16,26 +16,25 @@ repositories {
 }
 
 dependencies {
-    implementation("com.google.dagger:dagger:2.51")
-    kapt("com.google.dagger:dagger-compiler:2.51")
+    implementation("com.google.dagger:dagger:2.59.1")
+    ksp("com.google.dagger:dagger-compiler:2.59.1")
 
-    val ktorVersion = "3.0.0-rc-1"
+    val ktorVersion = "3.4.0"
     implementation("io.ktor:ktor-server-core:$ktorVersion")
     implementation("io.ktor:ktor-server-netty:$ktorVersion")
     implementation("io.ktor:ktor-serialization-kotlinx-json:$ktorVersion")
     implementation("io.ktor:ktor-server-content-negotiation:$ktorVersion")
-    implementation("io.ktor:ktor-serialization-kotlinx-json:$ktorVersion")
     implementation("io.ktor:ktor-server-body-limit:$ktorVersion")
     testImplementation("io.ktor:ktor-server-test-host:$ktorVersion")
     testImplementation("io.ktor:ktor-client-content-negotiation:$ktorVersion")
 
-    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.3")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.10.0")
 
-    implementation("ch.qos.logback:logback-classic:1.3.15")
+    implementation("ch.qos.logback:logback-classic:1.5.29")
 
     testImplementation(kotlin("test"))
-    testImplementation("org.junit.jupiter:junit-jupiter:5.10.3")
-    testImplementation("io.mockk:mockk:1.13.12")
+    testImplementation("org.junit.jupiter:junit-jupiter:5.14.2")
+    testImplementation("io.mockk:mockk:1.14.9")
     testImplementation("io.kotest:kotest-runner-junit5:5.9.1")
     testImplementation("io.kotest:kotest-assertions-core:5.9.1")
 }
@@ -76,7 +75,7 @@ tasks.register("generateBuildInfo") {
             "?"
         }
 
-        val outputDir = File(buildDir, "generated/buildinfo")
+        val outputDir = File(layout.buildDirectory.asFile.get(), "generated/buildinfo")
         outputDir.mkdirs()
         File(outputDir, "BuildInfo.kt").apply {
             writeText(

gradle/wrapper/gradle-wrapper.jar

@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
+zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -6,7 +6,7 @@ pluginManagement {
 }
 
 plugins {
-    id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
+    id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
 }
 
 rootProject.name = "octi-sync-server-kotlin"

gradlew

@@ -106,7 +106,7 @@ data class TestDevices(
     @Serializable
     data class Device(
         @Serializable(with = UUIDSerializer::class) val id: UUID,
-        val version: String = "Ktor client",
+        val version: String = "ktor-client",
     )
 }