mirror of https://github.com/sbt/sbt.git
51 lines
1.8 KiB
Scala
51 lines
1.8 KiB
Scala
/* sbt -- Simple Build Tool
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* Copyright 2011 Mark Harrah
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*/
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package sbt
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import java.util.regex.Pattern
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import java.io.File
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import Keys.{Streams, TaskStreams}
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import Project.ScopedKey
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import annotation.tailrec
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object Output
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{
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def showMatches(pattern: Pattern)(line: String): Option[String] =
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{
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val matcher = pattern.matcher(line)
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if(ConsoleLogger.formatEnabled)
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{
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val highlighted = matcher.replaceAll(scala.Console.RED + "$0" + scala.Console.RESET)
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if(highlighted == line) None else Some(highlighted)
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}
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else if(matcher.find)
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Some(line)
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else
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None
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}
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final val DefaultTail = "> "
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def last(key: ScopedKey[_], mgr: Streams): Unit = printLines(lastLines(key, mgr))
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def last(file: File, tailDelim: String = DefaultTail): Unit = printLines(tailLines(file, tailDelim))
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def lastGrep(key: ScopedKey[_], mgr: Streams, patternString: String): Unit =
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lastGrep(lastLines(key, mgr), patternString )
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def lastGrep(file: File, patternString: String, tailDelim: String = DefaultTail): Unit =
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lastGrep( tailLines(file, tailDelim), patternString)
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def lastGrep(lines: Seq[String], patternString: String): Unit =
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printLines(lines flatMap showMatches(Pattern compile patternString))
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def printLines(lines: Seq[String]) = lines foreach println
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def lastLines(key: ScopedKey[_], mgr: Streams): Seq[String] = mgr.use(key) { s => IO.readLines(s.readText( Project.fillTaskAxis(key) )) }
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def tailLines(file: File, tailDelim: String): Seq[String] = headLines(IO.readLines(file).reverse, tailDelim).reverse
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@tailrec def headLines(lines: Seq[String], tailDelim: String): Seq[String] =
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if(lines.isEmpty)
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lines
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else
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{
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val (first, tail) = lines.span { line => ! (line startsWith tailDelim) }
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if(first.isEmpty) headLines(tail drop 1, tailDelim) else first
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}
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}
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