feat: MVP schedulingEngine

flake.nix

@@ -99,7 +99,7 @@
             nixosMachines // packages // devShells;
 
           packages = {
-            schedulingEngine = pkgs.callPackage ./schedulingEngine {};
+            schedule-optimizer = pkgs.callPackage ./schedule-optimizer {};
             genai = pkgs.callPackage ./genai {
               inherit (inputs) pyproject-nix uv2nix pyproject-build-systems;
             };

schedule-optimizer/.envrc

@@ -0,0 +1,9 @@
+# shellcheck shell=bash
+
+use flake .#kotlin-dev --no-pure-eval
+watch_file .envrc.private
+if [[ -f ../.envrc.private ]]; then
+  source_env ../.envrc.private
+else
+  echo "copy .envrc.private-template to .envrc.private and follow the instructions in this file"
+fi

schedulingEngine/.gitignore → schedule-optimizer/.gitignore

@@ -38,3 +38,4 @@ out/
 
 ### Kotlin ###
 .kotlin
+kls_database.db

schedule-optimizer/build.gradle.kts

@@ -0,0 +1,78 @@
+plugins {
+  java
+  kotlin("jvm") version "1.9.25"
+  kotlin("plugin.spring") version "1.9.25"
+  id("org.springframework.boot") version "3.5.0"
+  id("io.spring.dependency-management") version "1.1.7"
+  id("org.openapi.generator") version "7.13.0"
+}
+
+group = "com.nixops"
+
+version = "0.0.1-SNAPSHOT"
+
+val base = "$group.scheduleOptimizer"
+
+java { toolchain { languageVersion = JavaLanguageVersion.of(21) } }
+
+repositories { mavenCentral() }
+
+dependencies {
+  implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+  implementation("org.jetbrains.kotlin:kotlin-reflect")
+  implementation("org.springframework.boot:spring-boot-starter-web")
+  implementation("org.webjars:webjars-locator-core")
+  // implementation("org.choco-solver:choco-solver:4.10.14")
+
+  implementation("com.google.code.findbugs:jsr305:3.0.2")
+  implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml")
+  implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-xml")
+  implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
+  implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+  implementation("jakarta.validation:jakarta.validation-api")
+  implementation("jakarta.annotation:jakarta.annotation-api:2.1.0")
+
+  runtimeOnly("org.webjars:swagger-ui:5.25.3")
+
+  testImplementation("org.mockito.kotlin:mockito-kotlin:5.4.0")
+  testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
+  testImplementation("org.springframework.boot:spring-boot-starter-test") {
+    exclude(module = "junit")
+  }
+}
+
+sourceSets {
+  main {
+    kotlin { srcDir(layout.buildDirectory.dir("generated/src/main/kotlin")) }
+    resources { srcDir(layout.buildDirectory.dir("generated/src/main/resources")) }
+  }
+}
+
+tasks.openApiGenerate {
+  generatorName.set("kotlin-spring")
+  inputSpec.set("$rootDir/openapi.yaml")
+  outputDir.set(layout.buildDirectory.dir("generated").get().asFile.path)
+  apiPackage.set("$base.api")
+  modelPackage.set("$base.model")
+  groupId.set(group)
+  cleanupOutput.set(true)
+  configOptions.set(
+      mapOf(
+          // "interfaceOnly" to "true"useBeanValidation" to "true",",
+          "delegatePattern" to "true",
+          "apiSuffix" to "",
+          "useSpringBoot3" to "true",
+          "dateLibrary" to "java8",
+          "serializationLibrary" to "jackson",
+          "testFramework" to "kotest",
+          "useBeanValidation" to "true",
+          "documentationProvider" to "source"))
+}
+
+tasks.test { useJUnitPlatform() }
+
+tasks.named("compileKotlin") { dependsOn("openApiGenerate") }
+
+tasks.named("processResources") { dependsOn("openApiGenerate") }
+
+kotlin { compilerOptions { freeCompilerArgs.addAll(listOf("-Xjsr305=strict")) } }

schedulingEngine/default.nix → schedule-optimizer/default.nix

@@ -5,9 +5,12 @@
   gradle,
   jre,
   jdk21,
+  dockerTools,
+  buildEnv,
+  runCommand,
 }: let
   self = stdenv.mkDerivation rec {
-    pname = "schedulingEngine";
+    pname = "scheduleOptimizer";
     version = "0.0.1-SNAPSHOT";
 
     src = ./.;
@@ -27,10 +30,7 @@
     # this is required for using mitm-cache on Darwin
     __darwinAllowLocalNetworking = true;
 
-    gradleFlags = ["-Dfile.encoding=utf-8"];
-
-    # defaults to "assemble"
-    gradleBuildTask = "bootJar";
+    gradleFlags = ["-Dfile.encoding=utf-8" "--warning-mode=all"];
 
     # will run the gradleCheckTask (defaults to "test")
     doCheck = true;
@@ -43,6 +43,31 @@
         --add-flags "-jar $out/share/${pname}/${pname}-${version}.jar"
     '';
 
+    passthru = {
+      dockerImage = dockerTools.buildImage {
+        name = "nixops-${pname}";
+        tag = version;
+
+        copyToRoot = buildEnv {
+          name = "image-root";
+          paths = [
+            self
+            (runCommand "empty-tmp" {} ''
+              mkdir -p $out/tmp
+              chmod 1777 $out/tmp
+            '')
+          ];
+          pathsToLink = ["/"];
+        };
+
+        config = {
+          Cmd = ["/bin/${pname}"];
+          WorkingDir = "/";
+          ExposedPorts."8000/tcp" = {};
+        };
+      };
+    };
+
     meta.sourceProvenance = with lib.sourceTypes; [
       fromSource
       binaryBytecode # mitm cache