From 3fb580276af6bc12861de42c0115c04549c98177 Mon Sep 17 00:00:00 2001
From: Johannes Rudolph <johannes_rudolph@gmx.de>
Date: Wed, 10 Oct 2012 12:29:01 +0200
Subject: simplified syntax and provide a proper parser

---
 .../cc/spray/boilerplate/BoilerplatePlugin.scala   | 27 +++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

(limited to 'src/main/scala/cc/spray/boilerplate/BoilerplatePlugin.scala')

diff --git a/src/main/scala/cc/spray/boilerplate/BoilerplatePlugin.scala b/src/main/scala/cc/spray/boilerplate/BoilerplatePlugin.scala
index 0d8b9c3..df50691 100644
--- a/src/main/scala/cc/spray/boilerplate/BoilerplatePlugin.scala
+++ b/src/main/scala/cc/spray/boilerplate/BoilerplatePlugin.scala
@@ -12,7 +12,7 @@ object BoilerplatePlugin extends Plugin {
 
       target in boilerplateGenerate <<= (sourceManaged in Compile),
 
-      boilerplateGenerate <<= (streams, sourceDirectory in boilerplateGenerate, target in boilerplateGenerate) map Generator.generateFromTemplates,
+      boilerplateGenerate <<= (streams, sourceDirectory in boilerplateGenerate, target in boilerplateGenerate) map generateFromTemplates,
 
       (sourceGenerators in Compile) <+= boilerplateGenerate,
       (managedSourceDirectories in Compile) <+= target in boilerplateGenerate,
@@ -33,5 +33,30 @@ object BoilerplatePlugin extends Plugin {
       watchSources <++= (sourceDirKey, filterKey, excludeKey) map descendents
     def descendents(sourceDir: File, filt: FileFilter, excl: FileFilter) =
       sourceDir.descendantsExcept(filt, excl).get
+
+    def generateFromTemplates(streams: TaskStreams, sourceDir: File, targetDir: File): Seq[File] = {
+      val files = sourceDir ** "*.template"
+
+      def changeExtension(f: File): File = {
+        val (ext, name) = f.getName.reverse.span(_ != '.')
+        new File(f.getParent, name.drop(1).reverse.toString)
+      }
+
+      val mapping = (files x rebase(sourceDir, targetDir)).map {
+        case (orig, target) => (orig, changeExtension(target))
+      }
+
+      mapping foreach {
+        case (templateFile, target) =>
+          if (templateFile.lastModified > target.lastModified) {
+            streams.log.info("Generating '%s'" format target.getName)
+            val template = IO.read(templateFile)
+            IO.write(target, Generator.generateFromTemplate(template, 22))
+          } else
+            streams.log.debug("Template '%s' older than target. Ignoring." format templateFile.getName)
+      }
+
+      mapping.map(_._2)
+    }
   }
 }
-- 
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