Better Java template.

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/Mustache.kt

@@ -0,0 +1,19 @@
+package com.beust.kobalt.internal
+
+import com.github.mustachejava.DefaultMustacheFactory
+import java.io.*
+
+class Mustache {
+    companion object {
+        fun generateFile(mustacheIns: InputStream, createdFile: File, map: Map<String, Any>) {
+            val sw = StringWriter()
+            val pw = PrintWriter(sw)
+            var mf = DefaultMustacheFactory()
+            mf.compile(InputStreamReader(mustacheIns), "kobalt").execute(pw, map).flush()
+            with(createdFile) {
+                parentFile.mkdirs()
+                writeText(sw.toString())
+            }
+        }
+    }
+}

src/main/kotlin/com/beust/kobalt/app/BuildGenerator.kt

@@ -4,6 +4,7 @@ import com.beust.kobalt.Args
 import com.beust.kobalt.api.ITemplate
 import com.beust.kobalt.api.ITemplateContributor
 import com.beust.kobalt.maven.Pom
+import com.beust.kobalt.misc.KFiles
 import com.beust.kobalt.misc.log
 import com.beust.kobalt.plugin.KobaltPlugin
 import com.github.mustachejava.DefaultMustacheFactory
@@ -20,8 +21,18 @@ abstract class BuildGenerator : ITemplate {
     abstract val defaultTestDirectories : HashSet<String>
     abstract val directive : String
     abstract val fileMatch : (String) -> Boolean
+    open fun generateAdditionalFiles(args: Args, classLoader: ClassLoader) {}
+
+    private fun maybeGenerateAdditionalFiles(args: Args, classLoader: ClassLoader) {
+        val existingFiles = KFiles.findRecursively(File("."), fileMatch)
+        if (existingFiles.isEmpty()) {
+            generateAdditionalFiles(args, classLoader)
+        }
+    }
 
     companion object {
+        val PACKAGE_NAME = "com.example"
+
         /**
          * Turns a dot property into a proper Kotlin identifier, e.g. common.version -> commonVersion
          */
@@ -34,6 +45,11 @@ abstract class BuildGenerator : ITemplate {
     }
 
     override fun generateTemplate(args: Args, classLoader: ClassLoader) {
+        generateBuildFile(args, classLoader)
+        maybeGenerateAdditionalFiles(args, classLoader)
+    }
+
+    private fun generateBuildFile(args: Args, classLoader: ClassLoader) {
         val file = File(args.buildFile)
         if (! file.exists()) {
             PrintWriter(FileOutputStream(file)).use {
@@ -48,8 +64,8 @@ abstract class BuildGenerator : ITemplate {
             map: HashMap<String, Any?>) {
         var pom = Pom("imported", pomFile.absoluteFile)
         with(map) {
-            put("group", pom.groupId ?: "com.example")
-            put("artifactId", pom.artifactId ?: "com.example")
+            put("group", pom.groupId ?: PACKAGE_NAME)
+            put("artifactId", pom.artifactId ?: PACKAGE_NAME)
             put("version", pom.version ?: "0.1")
             put("name", pom.name ?: pom.artifactId)
             put("repositories", pom.repositories.map({ "\"$it\"" }).joinToString(","))
@@ -86,7 +102,7 @@ abstract class BuildGenerator : ITemplate {
             val currentDir = File(".").absoluteFile.parentFile
             with(map) {
                 put("name", currentDir.name)
-                put("group", "com.example")
+                put("group", PACKAGE_NAME)
                 put("version", "0.1")
                 put("directory", currentDir.absolutePath)
                 put("sourceDirectories", defaultSourceDirectories)
@@ -109,9 +125,9 @@ abstract class BuildGenerator : ITemplate {
                     .getResource(ITemplateContributor.DIRECTORY_NAME + "/build.mustache").openStream()
             val sw = StringWriter()
             val pw = PrintWriter(sw)
-            var mf = DefaultMustacheFactory();
-            var mustache = mf.compile(InputStreamReader(fileInputStream), "kobalt");
-            mustache.execute(pw, map).flush();
+            var mf = DefaultMustacheFactory()
+            var mustache = mf.compile(InputStreamReader(fileInputStream), "kobalt")
+            mustache.execute(pw, map).flush()
             return sw.toString()
         }
 }

src/main/kotlin/com/beust/kobalt/app/java/JavaBuildGenerator.kt

@@ -1,6 +1,12 @@
 package com.beust.kobalt.app.java
 
+import com.beust.kobalt.Args
+import com.beust.kobalt.api.ITemplateContributor
 import com.beust.kobalt.app.BuildGenerator
+import com.beust.kobalt.internal.Mustache
+import com.beust.kobalt.misc.KFiles
+import com.beust.kobalt.misc.log
+import java.io.File
 
 class JavaBuildGenerator: BuildGenerator() {
     override val defaultSourceDirectories = hashSetOf("src/main/java")
@@ -9,4 +15,28 @@ class JavaBuildGenerator: BuildGenerator() {
     override val templateName = "java"
     override val templateDescription = "Generate a simple Java project"
     override val fileMatch = { f: String -> f.endsWith(".java") }
+    override val instructions = "Now you can run either `./kobaltw test` or `./kobaltw run`"
+
+    override fun generateAdditionalFiles(args: Args, classLoader: ClassLoader) {
+        println("Generating Java files")
+
+        class FileInfo(val dir: String, val fileName: String, val mustacheFileName: String)
+
+        val fileMap = listOf(
+                FileInfo("src/main/java/" + PACKAGE_NAME.replace(".", "/"), "Example.java", "java.mustache"),
+                FileInfo("src/test/java/" + PACKAGE_NAME.replace(".", "/"), "ExampleTest.java", "java-test.mustache")
+        )
+
+        val map = mapOf("packageName" to PACKAGE_NAME)
+
+        fileMap.forEach {
+            val mustache = it.mustacheFileName
+            val fileInputStream = javaClass.classLoader
+                    .getResource(ITemplateContributor.DIRECTORY_NAME + "/$templateName/$mustache").openStream()
+            val createdFile = File(KFiles.joinDir(it.dir, it.fileName))
+            Mustache.generateFile(fileInputStream, File(KFiles.joinDir(it.dir, it.fileName)), map)
+            log(2, "Created $createdFile")
+        }
+
+    }
 }

src/main/resources/templates/build.mustache

@@ -1,5 +1,6 @@
 import com.beust.kobalt.*
-import com.beust.kobalt.plugin.packaging.assemble
+import com.beust.kobalt.plugin.packaging.*
+import com.beust.kobalt.plugin.application.*
 {{imports}}
 
 val repos = repos({{{repositories}}})
@@ -35,7 +36,7 @@ val p = {{directive}} {
     }
 
     dependenciesTest {
-//        compile("org.testng:testng:6.9.5")
+        compile("org.testng:testng:6.9.9")
         {{#testDependencies}}
         compile("{{groupId}}:{{artifactId}}:{{version}}")
         {{/testDependencies}}
@@ -46,4 +47,10 @@ val p = {{directive}} {
         jar {
         }
     }
+
+    application {
+        mainClass = "com.example.Example"
+    }
+
+
 }

src/main/resources/templates/java/java-test.mustache

@@ -0,0 +1,9 @@
+package {{packageName}};
+import org.testng.annotations.Test;
+
+public class ExampleTest {
+    @Test
+    public void f() {
+        System.out.println("Running test");
+    }
+}

src/main/resources/templates/java/java.mustache

@@ -0,0 +1,7 @@
+package {{packageName}};
+
+class Example {
+    public static void main(String[] argv) {
+        System.out.println("Hello world");
+    }
+}