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

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+package com.beust.kobalt.internal.build
+
+import com.beust.kobalt.homeDir
+import java.io.File
+import java.nio.file.*
+import java.nio.file.attribute.BasicFileAttributes
+
+interface IBuildSources {
+    fun findSourceFiles() : List<File>
+    val root: File
+    fun exists(): Boolean
+}
+
+class SingleFileBuildSources(val file: File) : IBuildSources {
+    override fun exists() = file.exists()
+    override fun findSourceFiles() = listOf(file)
+    override val root: File = file.parentFile.parentFile
+}
+
+class BuildSources(val file: File) : IBuildSources {
+
+    override val root = file
+
+    override fun findSourceFiles() : List<File> {
+        return listOf(/* "kobalt/src/a.kt",  */ "kobalt/src/Build.kt")
+                .map(::File)
+//                .map { BuildFile(Paths.get(it), it)}
+    }
+
+    override fun exists() = findSourceFiles().isNotEmpty()
+
+    fun _findSourceFiles() : List<File> {
+        val result = arrayListOf<File>()
+        Files.walkFileTree(Paths.get(file.absolutePath), object : SimpleFileVisitor<Path>() {
+            override fun preVisitDirectory(dir: Path?, attrs: BasicFileAttributes?): FileVisitResult {
+                if (dir != null) {
+                    val path = dir.toFile()
+                    println(path.name)
+                    if (path.name == "src" && path.parentFile.name == "kobalt") {
+                        val sources = path.listFiles().filter { it.name.endsWith(".kt")}
+                        result.addAll(sources)
+                    }
+                }
+
+                return FileVisitResult.CONTINUE
+            }
+        })
+        return result
+    }
+}
+
+fun main(args: Array<String>) {
+    val sources = BuildSources(File(homeDir("kotlin/kobalt"))).findSourceFiles()
+    println("sources: " + sources)
+}