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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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