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package sbt
import java.io.File
import java.util.regex.Pattern
import complete.Parser
import complete.DefaultParsers._
object CommandUtil
{
def readLines(files: Seq[File]): Seq[String] = files flatMap (line => IO.readLines(line)) flatMap processLine
def processLine(s: String) = { val trimmed = s.trim; if(ignoreLine(trimmed)) None else Some(trimmed) }
def ignoreLine(s: String) = s.isEmpty || s.startsWith("#")
private def canRead = (_: File).canRead
def notReadable(files: Seq[File]): Seq[File] = files filterNot canRead
def readable(files: Seq[File]): Seq[File] = files filter canRead
// slightly better fallback in case of older launcher
def bootDirectory(state: State): File =
try { state.configuration.provider.scalaProvider.launcher.bootDirectory }
catch { case e: NoSuchMethodError => new File(".").getAbsoluteFile }
def aligned(pre: String, sep: String, in: Seq[(String, String)]): Seq[String] =
{
val width = in.map(_._1.length).max
in.map { case (a, b) => (pre + fill(a, width) + sep + b) }
}
def fill(s: String, size: Int) = s + " " * math.max(size - s.length, 0)
def withAttribute[T](s: State, key: AttributeKey[T], ifMissing: String)(f: T => State): State =
(s get key) match {
case None => s.log.error(ifMissing); s.fail
case Some(nav) => f(nav)
}
def singleArgument(exampleStrings: Set[String]): Parser[String] =
{
val arg = (NotSpaceClass ~ any.*) map { case (ns, s) => (ns +: s).mkString }
token(Space) ~> token( arg examples exampleStrings )
}
def detail(selected: String, detailMap: Map[String, String]): String =
detailMap.get(selected) match
{
case Some(exactDetail) =>exactDetail
case None =>
val details = searchHelp(selected, detailMap)
if(details.isEmpty)
"No matches for regular expression '" + selected + "'."
else
layoutDetails(details)
}
def searchHelp(selected: String, detailMap: Map[String, String]): Map[String, String] =
{
val pattern = Pattern.compile(selected, HelpPatternFlags)
detailMap flatMap { case (k,v) =>
val contentMatches = Highlight.showMatches(pattern)(v)
val keyMatches = Highlight.showMatches(pattern)(k)
val keyString = Highlight.bold(keyMatches getOrElse k)
val contentString = contentMatches getOrElse v
if(keyMatches.isDefined || contentMatches.isDefined)
(keyString, contentString) :: Nil
else
Nil
}
}
def layoutDetails(details: Map[String,String]): String =
details.map { case (k,v) => k + "\n\n " + v } mkString("\n", "\n\n", "\n")
final val HelpPatternFlags = Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE
}
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