Origin tweet: https://twitter.com/li_haoyi/status/804657647446204417
A #Scala compiler plugin to add a nice banner every time it compiles things so it's easier to see in the SBT logspam
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A #Scala compiler plugin to add a nice banner
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| package demo | |
| import scala.tools.nsc.io.AbstractFile | |
| import scala.tools.nsc.{Global, Phase} | |
| import scala.tools.nsc.plugins.{Plugin, PluginComponent} | |
| class DemoPlugin(val global: Global) extends Plugin { | |
| import global._ | |
| override def init(options: List[String], error: String => Unit): Boolean = true | |
| val name = "demo" | |
| val description = "a plugin" | |
| val components = List[PluginComponent](DemoComponent) | |
| private object DemoComponent extends PluginComponent { | |
| val global = DemoPlugin.this.global | |
| import global._ | |
| override val runsAfter = List("parser") | |
| override val runsBefore = List("namer") | |
| val phaseName = "Demo" | |
| override def newPhase(prev: Phase) = new GlobalPhase(prev) { | |
| override def run() = { | |
| val count = global.currentRun.units.length | |
| val x: Iterator[Seq[String]] = global.currentRun.units.map(_.source.file.path.split("/")) | |
| var start = x.next() | |
| for(next <- x){ | |
| for(i <- next.indices){ | |
| if (i < start.length && start.lift(i) != next.lift(i)){ | |
| start = start.take(i) | |
| } | |
| } | |
| } | |
| val cwd = new java.io.File("").getAbsolutePath.split("/") | |
| if (start.startsWith(cwd)) start = start.drop(cwd.length) | |
| val msg = s"Compiling $count files in ${start.mkString("/")}" | |
| val spaces = " " * ((90 - msg.length) / 2) | |
| global.reporter.echo( | |
| scala.Console.BLUE_B + | |
| spaces + msg + spaces + | |
| scala.Console.RESET | |
| ) | |
| } | |
| def name: String = phaseName | |
| def apply(unit: global.CompilationUnit): Unit = {} | |
| } | |
| } | |
| } |
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