From 4dcc11418333491b4cb2ed8429e723c42034699d Mon Sep 17 00:00:00 2001
From: moix <moix@epfl.ch>
Date: Tue, 7 Sep 2010 09:38:32 +0000
Subject: Stability testing task added.

---
 project/build/Comparator.scala | 72 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 project/build/Comparator.scala

(limited to 'project/build/Comparator.scala')

diff --git a/project/build/Comparator.scala b/project/build/Comparator.scala
new file mode 100644
index 0000000000..8b5d65d157
--- /dev/null
+++ b/project/build/Comparator.scala
@@ -0,0 +1,72 @@
+import sbt._
+import java.io.{File,FileInputStream}
+
+// Based on scala.tools.ant.Same
+object Comparator {
+
+    private def getMappedPath(path:Path,baseDirectory:Path):Path= {
+      Path.fromString(baseDirectory,path.relativePath)
+    }
+
+
+    def compare(origin:Path,dest:Path,filter:Path=>PathFinder,log:Logger):Option[String] = {
+      log.info("Comparing the contents of "+origin.absolutePath+ " with "+dest.absolutePath)
+      var allEqualNow = true
+
+      def reportDiff(f1: File, f2: File) = {
+        allEqualNow = false
+        log.error("File '" + f1 + "' is different from correspondant.")
+      }
+
+      def reportMissing(f1: File) = {
+        allEqualNow = false
+        log.error("File '" + f1 + "' has no correspondant.")
+      }
+
+
+
+      val originPaths = filter(origin).get
+
+      val bufferSize = 1024
+      val originBuffer = new Array[Byte](bufferSize)
+      val destBuffer = new Array[Byte](bufferSize)
+
+      for (originPath <- originPaths.filter(! _.isDirectory)){
+        log.debug("origin :" + originPath.absolutePath)
+        val destPath = getMappedPath(originPath,dest)
+        log.debug("dest   :" + destPath.absolutePath)
+        var equalNow = true
+        val originFile = originPath.asFile
+        val destFile = destPath.asFile
+
+        if (originFile.canRead && destFile.canRead) {
+
+        val originStream = new FileInputStream(originFile)
+        val destStream = new FileInputStream(destFile)
+        var originRemaining = originStream.read(originBuffer)
+        var destRemaining = destStream.read(destBuffer)
+        while (originRemaining > 0 && equalNow) {
+          if (originRemaining == destRemaining)
+            for (idx <- 0 until originRemaining) {
+              equalNow = equalNow && (originBuffer(idx) == destBuffer(idx))}
+          else
+            equalNow = false
+          originRemaining = originStream.read(originBuffer)
+          destRemaining = destStream.read(destBuffer)
+        }
+        if (destRemaining > 0) equalNow = false
+
+        if (!equalNow) reportDiff(originFile, destFile)
+
+        originStream.close
+        destStream.close
+
+      }
+      else reportMissing(originFile)
+
+      }
+      if(allEqualNow) None else Some("There were differences between "+origin.absolutePath+ " and "+ dest.absolutePath)
+    }
+
+
+}
-- 
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