css

.editorconfig

@@ -0,0 +1,18 @@
+# editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.{kt, kts}]
+indent_size = 4
+insert_final_newline = true
+continuation_indent_size=4
+max_line_length = 120
+disabled_rules = no-wildcard-imports
+kotlin_imports_layout = idea

config.toml

@@ -29,48 +29,47 @@ url = "https://dl.bintray.com/arrow-kt/arrow-kt/"
 [dependencies.http4k]
 groupId = "org.http4k"
 artifactId = "http4k-core"
-version = "3.261.0"
-category = "server"
+version = "3.264.0"
+category = "http4k"
 default = true
 
 [dependencies.http4k-server-jetty]
 groupId = "org.http4k"
 artifactId = "http4k-server-jetty"
-version = "3.261.0"
-category = "server"
+version = "3.264.0"
+category = "http4k"
 default = true
 logger = "org.eclipse.jetty"
 
 [dependencies.http4k-server-apache]
 groupId = "org.http4k"
 artifactId = "http4k-server-apache"
-version = "3.261.0"
-category = "server"
+version = "3.264.0"
+category = "http4k"
 
 [dependencies.http4k-client-apache]
 groupId = "org.http4k"
 artifactId = "http4k-client-apache"
-version = "3.261.0"
-category = "server"
+version = "3.264.0"
+category = "http4k"
 
 [dependencies.http4k-format-jackson]
 groupId = "org.http4k"
 artifactId = "http4k-format-jackson"
-version = "3.261.0"
-category = "server"
+version = "3.264.0"
+category = "http4k"
+
+[dependencies.http4k-format-kotlinx-serialization]
+groupId = "org.http4k"
+artifactId = "http4k-format-kotlinx-serialization"
+version = "3.264.0"
+category = "http4k"
 
 [dependencies.http4k-contract]
 groupId = "org.http4k"
 artifactId = "http4k-contract"
-version = "3.261.0"
-category = "server"
-
-[dependencies.javalin]
-groupId = "io.javalin"
-artifactId = "javalin"
-version = "3.10.1"
-category = "server"
-logger = "org.eclipse.jetty"
+version = "3.264.0"
+category = "http4k"
 
 [dependencies.pebble]
 groupId = "io.pebbletemplates"

pom.xml

@@ -10,6 +10,7 @@
         <maven.compiler.source>11</maven.compiler.source>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <kotlin.version>1.4.10</kotlin.version>
+        <kotlin.code.style>official</kotlin.code.style>
     </properties>
 
     <repositories>
@@ -51,6 +52,11 @@
             <artifactId>koin-core</artifactId>
             <version>2.1.6</version>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>1.7.30</version>
+        </dependency>
     </dependencies>
 
     <build>

src/css/tailwind.config.js

@@ -1,7 +1,8 @@
 module.exports = {
     purge: {
         content: [
-            '../main/resources/views/**/*.twig'
+            '../main/resources/views/**/*.twig',
+            '../main/kotlin/starter/PebbleModule.kt',
         ]
     },
     theme: {},

src/main/kotlin/starter/Config.kt

@@ -4,9 +4,9 @@ import com.electronwill.nightconfig.core.file.FileConfig
 import com.electronwill.nightconfig.core.Config as NightConfig
 
 data class StarterConfig(
-        val dependencies: List<Dependency>,
-        val inputs: List<Input>,
-        val repositories: List<Repository>,
+    val dependencies: List<Dependency>,
+    val inputs: List<Input>,
+    val repositories: List<Repository>,
 )
 
 class Config {
@@ -19,31 +19,30 @@ class Config {
         cfg.load()
 
         val dependencies = cfg.configMap("dependencies")
-                .map { (name, values) ->
-                    Dependency(
-                            name,
-                            values["groupId"],
-                            values["artifactId"],
-                            values["version"],
-                            values.getOrElse("default", false),
-                            values.getEnumOrElse("category", Category.Other),
-                            values.getEnumOrElse("scope", Scope.Compile),
-                            values["logger"],
-                            values["repository"],
-                    )
-                }
+            .map { (name, values) ->
+                Dependency(
+                    name,
+                    values["groupId"],
+                    values["artifactId"],
+                    values["version"],
+                    values.getOrElse("default", false),
+                    values.getEnumOrElse("category", Category.Other),
+                    values.getEnumOrElse("scope", Scope.Compile),
+                    values["logger"],
+                    values["repository"],
+                )
+            }
 
         val inputs = cfg.configMap("inputs")
-                .map { (name, values) ->
-                    Input(name, values["display"], values["default"])
-                }
+            .map { (name, values) ->
+                Input(name, values["display"], values["default"])
+            }
 
         val repositories = cfg.configMap("repositories")
-                .map { (name, values) ->
-                    Repository(name, values["url"])
-                }
+            .map { (name, values) ->
+                Repository(name, values["url"])
+            }
 
         return StarterConfig(dependencies, inputs, repositories)
     }
-
 }

src/main/kotlin/starter/KotlinStarter.kt

@@ -1,15 +1,34 @@
 package starter
 
+import org.http4k.core.then
+import org.http4k.filter.ServerFilters
+import org.http4k.routing.ResourceLoader
+import org.http4k.routing.RoutingHttpHandler
+import org.http4k.routing.routes
+import org.http4k.routing.static
+import org.http4k.server.SunHttp
+import org.http4k.server.asServer
 import org.koin.core.context.startKoin
 import org.koin.dsl.bind
 import org.koin.dsl.module
+import org.koin.dsl.onClose
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+import starter.routes.IndexRouteSupplier
+import starter.routes.RouteSupplier
+import starter.routes.ZipRouteSupplier
+import starter.routes.toRouter
 import starter.templates.*
 
 val mainModule = module {
+    single(createdAtStart = true) {
+        get<Logger>().info("Starting on http://localhost:7000")
+        get<RoutingHttpHandler>().asServer(SunHttp(7000)).start()
+    } onClose { it?.stop() }
+
     single { Config().load() }
-    single { PebbleModule().engine() }
-    single { Server(get(), get(), get()) }
-    single { Views(get()) }
+    single { LoggerFactory.getLogger("Starter") }
+    single { Views(get(), get()) }
     single { ProjectZip(getAll()) }
 }
 
@@ -20,10 +39,20 @@ val templateModule = module {
     single { GitignoreTemplate(get()) } bind Template::class
 }
 
-fun main() {
-    val koin = startKoin {
-        modules(mainModule, templateModule)
-    }.koin
-    val server = koin.get<Server>()
-    server.run()
+val routesModule = module {
+    single { IndexRouteSupplier(get()) } bind RouteSupplier::class
+    single { ZipRouteSupplier(get(), get()) } bind RouteSupplier::class
+    single {
+        ServerFilters.CatchAll().then(
+            routes(
+                static(ResourceLoader.Classpath("/assets")),
+                getAll<RouteSupplier>().toRouter()
+            ))
+    }
+}
+
+fun main() {
+    startKoin {
+        modules(mainModule, pebbleModule, templateModule, routesModule)
+    }
 }

src/main/kotlin/starter/Models.kt

@@ -1,7 +1,7 @@
 package starter
 
 enum class Category {
-    Server, Injection, Database, Serialization, Test, Other
+    Http4k, Injection, Database, Serialization, Test, Other
 }
 
 enum class Scope {
@@ -9,15 +9,15 @@ enum class Scope {
 }
 
 data class Dependency(
-        val name: String,
-        val groupId: String,
-        val artifactId: String,
-        val version: String,
-        val default: Boolean,
-        val category: Category,
-        val scope: Scope,
-        val logger: String?,
-        val repository: String?,
+    val name: String,
+    val groupId: String,
+    val artifactId: String,
+    val version: String,
+    val default: Boolean,
+    val category: Category,
+    val scope: Scope,
+    val logger: String?,
+    val repository: String?,
 )
 
 data class Repository(val name: String, val url: String)
@@ -25,9 +25,9 @@ data class Repository(val name: String, val url: String)
 data class Input(val name: String, val display: String, val value: String? = null)
 
 data class Project(
-        val name: String,
-        val basePackage: String,
-        val inputs: List<Input>,
-        val dependencies: List<Dependency>,
-        val repositories: List<Repository>,
+    val name: String,
+    val basePackage: String,
+    val inputs: List<Input>,
+    val dependencies: List<Dependency>,
+    val repositories: List<Repository>,
 )

src/main/kotlin/starter/PebbleModule.kt

@@ -1,15 +1,57 @@
 package starter
 
-import com.mitchellbosecke.pebble.PebbleEngine
-import com.mitchellbosecke.pebble.loader.ClasspathLoader
+import com.mitchellbosecke.pebble.extension.escaper.SafeString
+import com.mitchellbosecke.pebble.template.EvaluationContext
+import com.mitchellbosecke.pebble.template.PebbleTemplate
+import org.intellij.lang.annotations.Language
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import starter.utils.PebbleEngineBuilder
+import starter.utils.PebbleEngineBuilder.CacheType.ConcurrentMap
+import starter.utils.PebbleFunction
 
-class PebbleModule {
-    fun engine(): PebbleEngine {
-        val loader = ClasspathLoader()
-        loader.suffix = ".twig"
-        return PebbleEngine.Builder()
-                .loader(loader)
-                .cacheActive(true)
-                .build()
+class DepAsXmlPebbleFunction : PebbleFunction {
+    override val name = "depAsXml"
+    override fun getArgumentNames() = listOf("dependency")
+    override fun execute(args: Map<String, Any>, self: PebbleTemplate, context: EvaluationContext, lineNumber: Int): Any {
+        val dep = args["dependency"] as Dependency
+
+        fun startTag(name: String): String {
+            @Language("html") @Suppress("UnnecessaryVariable")
+            val result = """<span class="text-gray-700">&lt;</span><span class="text-red-700">$name</span><span class="text-gray-700">&gt;</span>"""
+            return result
+        }
+
+        fun endTag(name: String): String {
+            @Language("html") @Suppress("UnnecessaryVariable")
+            val result = """<span class="text-gray-700">&lt;/</span><span class="text-red-700">$name</span><span class="text-gray-700">&gt;</span>"""
+            return result
+        }
+
+        fun tag(name: String, content: String): String {
+            return """${startTag(name)}$content${endTag(name)}"""
+        }
+
+        val result = """
+            |${startTag("dependency")}
+            |   ${tag("groupId", dep.groupId)}
+            |   ${tag("artifactId", dep.artifactId)}
+            |   ${tag("version", dep.version)}
+            |${endTag("dependency")}
+        """.trimMargin()
+
+        return SafeString(result)
+    }
+}
+
+val pebbleModule = module {
+    single { DepAsXmlPebbleFunction() } bind PebbleFunction::class
+
+    single {
+        PebbleEngineBuilder {
+            cache = ConcurrentMap
+            functions(getAll())
+            classPath { suffix = ".twig" }
+        }
     }
 }

src/main/kotlin/starter/ProjectZip.kt

@@ -17,5 +17,4 @@ class ProjectZip(private val templates: List<Template>) {
         }
         return zipOutput.outputStream
     }
-
 }

src/main/kotlin/starter/Server.kt

@@ -1,68 +0,0 @@
-package starter
-
-import org.http4k.core.HttpHandler
-import org.http4k.core.Method
-import org.http4k.core.Response
-import org.http4k.core.Status
-import org.http4k.core.body.form
-import org.http4k.core.body.formAsMap
-import org.http4k.routing.ResourceLoader
-import org.http4k.routing.bind
-import org.http4k.routing.routes
-import org.http4k.routing.static
-import org.http4k.server.SunHttp
-import org.http4k.server.asServer
-import starter.utils.sanitizeFilename
-import java.io.ByteArrayInputStream
-
-class Server(
-        private val views: Views,
-        private val conf: StarterConfig,
-        private val projectZip: ProjectZip,
-) {
-
-    fun run() {
-        val indexHandler: HttpHandler = {
-            Response(Status.OK).body(views.index(conf.dependencies, conf.inputs)).header("Content-Type", "text/html")
-        }
-        val zipHandler: HttpHandler = { req ->
-            val deps = conf.dependencies.filter {
-                req.form(it.name) != null
-            }
-
-            val inputKeys = conf.inputs.map { it.name }
-            val inputs = req.formAsMap()
-                    .filter { it.key in inputKeys }
-                    .map { (name, value) ->
-                        conf.inputs.find { it.name == name }!!.copy(value = value.first())
-                    }
-
-            val projectName = inputs.find { it.name == "name" }!!.value!!
-            val basePackage = inputs.find { it.name == "basePackage" }!!.value!!
-
-            if (basePackage.contains("/") || basePackage.contains("..")) {
-                Response(Status.BAD_REQUEST).body("Invalid Base Package")
-            } else {
-                val repositories = conf.repositories
-                        .filter { repo -> repo.name in deps.mapNotNull { it.repository } }
-
-                val project = Project(projectName, basePackage, inputs, deps, repositories)
-                val outputStream = projectZip.createZip(project)
-
-                Response(Status.OK).header("Content-Type", "application/zip")
-                        .header("Content-Disposition", "attachment; filename=\"${sanitizeFilename(projectName)}.zip\"")
-                        .body(ByteArrayInputStream(outputStream.toByteArray()))
-            }
-        }
-
-        val app = routes(
-                "/" bind Method.GET to indexHandler,
-                "/" bind Method.POST to zipHandler,
-                static(ResourceLoader.Classpath("/assets"))
-        )
-
-        app.asServer(SunHttp(7000)).start()
-        println("Started on http://localhost:7000")
-    }
-
-}

src/main/kotlin/starter/Views.kt

@@ -1,17 +1,13 @@
 package starter
 
 import com.mitchellbosecke.pebble.PebbleEngine
-import org.slf4j.LoggerFactory
 import starter.utils.render
 
-class Views(private val engine: PebbleEngine) {
-    private val logger = LoggerFactory.getLogger(javaClass)
+class Views(private val engine: PebbleEngine, config: StarterConfig) {
+    private val args = mapOf(
+        "dependencies" to config.dependencies.groupBy { it.category }.toSortedMap(),
+        "inputs" to config.inputs
+    )
 
-    fun index(dependencies: List<Dependency>, inputs: List<Input>): String {
-        val dependenciesByCategory = dependencies.groupBy { it.category }.toSortedMap()
-        return engine.render("views/index",
-                mapOf("dependencies" to dependenciesByCategory, "inputs" to inputs)
-        )
-    }
-
-}
+    fun index() = engine.render("views/index", args)
+}

src/main/kotlin/starter/extensions/Http4kExtensions.kt

@@ -0,0 +1,17 @@
+@file:Suppress("NOTHING_TO_INLINE")
+
+package starter.extensions
+
+import org.http4k.core.Response
+import org.http4k.core.Status
+import starter.utils.sanitizeFilename
+import java.io.InputStream
+
+inline fun Response.Companion.ok() = Response(Status.OK)
+inline fun Response.Companion.badRequest() = Response(Status.BAD_REQUEST)
+
+fun attachment(value: InputStream, name: String, contentType: String) = { res: Response ->
+    res.header("Content-Type", contentType)
+        .header("Content-Disposition", "attachment; filename=\"${sanitizeFilename(name)}\"")
+        .body(value)
+}

src/main/kotlin/starter/routes/IndexRouteSupplier.kt

@@ -0,0 +1,16 @@
+package starter.routes
+
+import org.http4k.core.Method
+import org.http4k.core.Response
+import org.http4k.core.Status
+import org.http4k.routing.bind
+import starter.StarterConfig
+import starter.Views
+
+class IndexRouteSupplier(private val views: Views) : RouteSupplier {
+    override fun get() = "/" bind Method.GET to {
+        Response(Status.OK)
+            .body(views.index())
+            .header("Content-Type", "text/html")
+    }
+}

src/main/kotlin/starter/routes/RouteSupplier.kt

@@ -0,0 +1,10 @@
+package starter.routes
+
+import org.http4k.routing.RoutingHttpHandler
+import org.http4k.routing.routes
+
+interface RouteSupplier {
+    fun get(): RoutingHttpHandler
+}
+
+fun List<RouteSupplier>.toRouter() = routes(*map { it.get() }.toTypedArray())

src/main/kotlin/starter/routes/ZipRouteSupplier.kt

@@ -0,0 +1,56 @@
+package starter.routes
+
+import org.http4k.core.Method
+import org.http4k.core.Response
+import org.http4k.core.body.form
+import org.http4k.core.body.formAsMap
+import org.http4k.core.with
+import org.http4k.routing.bind
+import starter.Project
+import starter.ProjectZip
+import starter.StarterConfig
+import starter.extensions.attachment
+import starter.extensions.badRequest
+import starter.extensions.ok
+import java.io.ByteArrayInputStream
+
+class ZipRouteSupplier(
+    private val conf: StarterConfig,
+    private val projectZip: ProjectZip,
+) : RouteSupplier {
+
+    override fun get() = "/" bind Method.POST to { req ->
+
+        val deps = conf.dependencies.filter {
+            req.form(it.name) != null
+        }
+
+        val inputKeys = conf.inputs.map { it.name }
+        val inputs = req.formAsMap()
+            .filter { it.key in inputKeys }
+            .map { (name, value) ->
+                conf.inputs.find { it.name == name }!!.copy(value = value.first())
+            }
+
+        val projectName = inputs.find { it.name == "name" }!!.value!!
+        val basePackage = inputs.find { it.name == "basePackage" }!!.value!!
+
+        if (basePackage.contains("/") || basePackage.contains("..")) {
+            Response.badRequest()
+        } else {
+            val repositories = conf.repositories
+                .filter { repo -> repo.name in deps.mapNotNull { it.repository } }
+
+            val project = Project(projectName, basePackage, inputs, deps, repositories)
+            val outputStream = projectZip.createZip(project)
+
+            Response.ok().with(
+                attachment(
+                    value = ByteArrayInputStream(outputStream.toByteArray()),
+                    name = "$projectName.zip",
+                    contentType = "application/zip"
+                )
+            )
+        }
+    }
+}

src/main/kotlin/starter/templates/GitignoreTemplate.kt

@@ -6,8 +6,8 @@ import starter.utils.render
 
 class GitignoreTemplate(private val engine: PebbleEngine) : Template {
     override fun path(project: Project) =
-            ".gitignore"
+        ".gitignore"
 
     override fun render(project: Project) =
-            engine.render("starter/gitignore/index")
+        engine.render("starter/gitignore/index")
 }

src/main/kotlin/starter/templates/LogbackTemplate.kt

@@ -12,7 +12,7 @@ class LogbackTemplate(private val engine: PebbleEngine) : Template {
 
     override fun render(project: Project): String {
         val args = mapOf(
-                "loggers" to project.dependencies.mapNotNull { it.logger }.toSet()
+            "loggers" to project.dependencies.mapNotNull { it.logger }.toSet()
         )
         val rendered = engine.render("starter/logback/index", args)
         return prettyPrintXml(rendered)

src/main/kotlin/starter/templates/MainTemplate.kt

@@ -6,8 +6,8 @@ import starter.utils.render
 
 class MainTemplate(private val engine: PebbleEngine) : Template {
     override fun path(project: Project) =
-            "src/main/kotlin/" + project.basePackage.replace('.', '/') + "/" + project.name.toLowerCase().capitalize() + ".kt"
+        "src/main/kotlin/" + project.basePackage.replace('.', '/') + "/" + project.name.toLowerCase().capitalize() + ".kt"
 
     override fun render(project: Project) =
-            engine.render("starter/main/index", mapOf("basePackage" to project.basePackage))
+        engine.render("starter/main/index", mapOf("basePackage" to project.basePackage))
 }

src/main/kotlin/starter/templates/PomTemplate.kt

@@ -10,9 +10,9 @@ class PomTemplate(private val engine: PebbleEngine) : Template {
 
     override fun render(project: Project): String {
         val args: MutableMap<String, Any?> = mutableMapOf(
-                "dependencies" to project.dependencies.sortedBy { it.scope },
-                "repositories" to project.repositories,
-                "kotlinxSerialization" to project.dependencies.any { it.name == "Kotlinx-serialization" },
+            "dependencies" to project.dependencies.sortedBy { it.scope },
+            "repositories" to project.repositories,
+            "kotlinxSerialization" to project.dependencies.any { it.name == "Kotlinx-serialization" },
         )
 
         project.inputs.forEach {

src/main/kotlin/starter/utils/PebbleUtils.kt

@@ -1,11 +1,87 @@
 package starter.utils
 
 import com.mitchellbosecke.pebble.PebbleEngine
+import com.mitchellbosecke.pebble.cache.tag.CaffeineTagCache
+import com.mitchellbosecke.pebble.cache.tag.ConcurrentMapTagCache
+import com.mitchellbosecke.pebble.cache.tag.NoOpTagCache
+import com.mitchellbosecke.pebble.cache.template.CaffeineTemplateCache
+import com.mitchellbosecke.pebble.cache.template.ConcurrentMapTemplateCache
+import com.mitchellbosecke.pebble.cache.template.NoOpTemplateCache
+import com.mitchellbosecke.pebble.extension.AbstractExtension
+import com.mitchellbosecke.pebble.extension.Filter
+import com.mitchellbosecke.pebble.extension.Function
+import com.mitchellbosecke.pebble.loader.ClasspathLoader
 import java.io.StringWriter
 
-fun PebbleEngine.render(name: String, args: Map<String, Any?> = mapOf()): String {
-    val template = getTemplate(name)
-    val writer = StringWriter()
-    template.evaluate(writer, args)
-    return writer.toString()
-}
+fun PebbleEngine.render(name: String, args: Map<String, Any?> = mapOf()) =
+    getTemplate(name).let { StringWriter().apply { it.evaluate(this, args) }.toString() }
+
+fun PebbleEngine.render(name: String, vararg args: Pair<String, Any?>) =
+    render(name, mapOf(*args))
+
+interface PebbleFunction : Function {
+    val name: String
+}
+
+interface PebbleFilter : Filter {
+    val name: String
+}
+
+class PebbleEngineBuilder {
+    enum class CacheType {
+        None, Caffeine, ConcurrentMap
+    }
+
+    private var loader = ClasspathLoader()
+    var cache = CacheType.ConcurrentMap
+
+    private val functions = mutableListOf<PebbleFunction>()
+    private val filters = mutableListOf<PebbleFilter>()
+
+    fun function(function: PebbleFunction) {
+        functions.add(function)
+    }
+
+    fun functions(functions: Iterable<PebbleFunction>) {
+        this.functions.addAll(functions)
+    }
+
+    fun filter(filter: PebbleFilter) {
+        filters.add(filter)
+    }
+
+    fun filters(filters: Iterable<PebbleFilter>) {
+        this.filters.addAll(filters)
+    }
+
+    fun classPath(block: ClasspathLoader.() -> Unit) {
+        loader = ClasspathLoader().apply(block)
+    }
+
+    companion object {
+        operator fun invoke(block: PebbleEngineBuilder.() -> Unit): PebbleEngine =
+            PebbleEngineBuilder().apply(block).let { builder ->
+                PebbleEngine.Builder()
+                    .loader(builder.loader)
+                    .cacheActive(builder.cache != CacheType.None)
+                    .templateCache(when (builder.cache) {
+                        CacheType.None -> NoOpTemplateCache()
+                        CacheType.Caffeine -> CaffeineTemplateCache()
+                        CacheType.ConcurrentMap -> ConcurrentMapTemplateCache()
+                    })
+                    .tagCache(when (builder.cache) {
+                        CacheType.None -> NoOpTagCache()
+                        CacheType.Caffeine -> CaffeineTagCache()
+                        CacheType.ConcurrentMap -> ConcurrentMapTagCache()
+                    })
+                    .extension(object : AbstractExtension() {
+                        override fun getFunctions(): Map<String, Function>? =
+                            builder.functions.associateBy { it.name }.ifEmpty { null }
+
+                        override fun getFilters(): Map<String, Filter>? =
+                            builder.filters.associateBy { it.name }.ifEmpty { null }
+                    })
+                    .build()
+            }
+    }
+}

src/main/kotlin/starter/utils/XmlUtils.kt

@@ -13,22 +13,23 @@ import javax.xml.transform.stream.StreamResult
 import javax.xml.xpath.XPathConstants
 import javax.xml.xpath.XPathFactory
 
-
 /*
     @see https://stackoverflow.com/a/33541820
  */
 fun prettyPrintXml(xml: String, indent: Int = 4): String {
     // Turn xml string into a document
     val document: Document = DocumentBuilderFactory.newInstance()
-            .newDocumentBuilder()
-            .parse(InputSource(ByteArrayInputStream(xml.encodeToByteArray())))
+        .newDocumentBuilder()
+        .parse(InputSource(ByteArrayInputStream(xml.encodeToByteArray())))
 
     // Remove whitespaces outside tags
     document.normalize()
     val xPath = XPathFactory.newInstance().newXPath()
-    val nodeList = xPath.evaluate("//text()[normalize-space()='']",
-            document,
-            XPathConstants.NODESET) as NodeList
+    val nodeList = xPath.evaluate(
+        "//text()[normalize-space()='']",
+        document,
+        XPathConstants.NODESET
+    ) as NodeList
     for (i in 0 until nodeList.length) {
         val node = nodeList.item(i)
         node.parentNode.removeChild(node)
@@ -46,4 +47,4 @@ fun prettyPrintXml(xml: String, indent: Int = 4): String {
     val stringWriter = StringWriter()
     transformer.transform(DOMSource(document), StreamResult(stringWriter))
     return stringWriter.toString()
-}
+}

src/main/resources/views/#macros.twig

@@ -1,9 +1,14 @@
 {% macro dependency(dependency) %}
-    <label class="m-2">
-        <input name="{{ dependency.name }}"
-               type="checkbox"{% if dependency.default %} checked{% endif %}>
-        <span>{{ dependency.name }}</span>
-    </label>
+    <details>
+        <summary>
+            <label class="m-2">
+                <input name="{{ dependency.name }}"
+                       type="checkbox"{% if dependency.default %} checked{% endif %}>
+                <span>{{ dependency.name }}</span>
+            </label>
+        </summary>
+        <pre><code>{{ depAsXml(dependency) }}</code></pre>
+    </details>
 {% endmacro %}
 
 {% macro input(input) %}
@@ -17,4 +22,4 @@
             <input name="{{ input.name }}" id="{{ input.name }}" class="input"{% if input.value %} value="{{ input.value }}"{% endif %}>
         </div>
     </div>
-{% endmacro %}
+{% endmacro %}

src/main/resources/views/index.twig

@@ -21,6 +21,6 @@
                 </section>
             {% endfor %}
         </div>
-        <button type="submit" class="w-full btn btn-purple">Submit</button>
+        <button type="submit" class="my-4 w-full btn btn-purple">Submit</button>
     </form>
 {% endblock %}