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package mill
import ammonite.interp.Interpreter
import ammonite.main.Scripts
import ammonite.ops._
import ammonite.util.{Colors, Res}
import mill.define.Task
import mill.discover._
import mill.eval.{Evaluator, Result}
import mill.util.OSet
import ammonite.main.Scripts.pathScoptRead
import ammonite.repl.Repl
object Main {
def parseSelector(input: String) = {
import fastparse.all._
val segment = P( CharsWhileIn(('a' to 'z') ++ ('A' to 'Z') ++ ('0' to '9')).! )
val crossSegment = P( "[" ~ CharsWhile(c => c != ',' && c != ']').!.rep(1, sep=",") ~ "]" )
val query = P( segment ~ ("." ~ segment.map(Left(_)) | crossSegment.map(Right(_))).rep ~ End ).map{
case (h, rest) => Left(h) :: rest.toList
}
query.parse(input)
}
def apply[T: Discovered](args: Seq[String],
obj: T,
watch: Path => Unit,
coloredOutput: Boolean): Int = {
val log = new Logger(coloredOutput)
val Seq(selectorString, rest @_*) = args
parseSelector(selectorString) match{
case f: fastparse.all.Parsed.Failure =>
log.error(f.msg)
1
case fastparse.all.Parsed.Success(selector, idx) =>
val discovered = implicitly[Discovered[T]]
val consistencyErrors = Discovered.consistencyCheck(obj, discovered)
if (consistencyErrors.nonEmpty) {
log.error("Failed Discovered.consistencyCheck: " + consistencyErrors)
1
} else {
val mapping = Discovered.mapping(obj)(discovered)
val workspacePath = pwd / 'out
val crossSelectors = selector.collect{case Right(x) => x.toList}
def resolve[V](selector: List[Either[String, Seq[String]]],
hierarchy: Mirror[T, V]): Option[Task[Any]] = {
selector match{
case Right(_) :: Nil => ???
case Left(last) :: Nil =>
def target: Option[Task[Any]] =
hierarchy.targets.find(_.label == last).map(_.run(hierarchy.node(obj, crossSelectors)))
def command: Option[Task[Any]] = hierarchy.commands.find(_.name == last).flatMap(
_.invoke(hierarchy.node(obj, crossSelectors), ammonite.main.Scripts.groupArgs(rest.toList)) match{
case Router.Result.Success(v) => Some(v)
case _ => None
}
)
target orElse command
case head :: tail =>
head match{
case Left(singleLabel) =>
hierarchy.children
.collectFirst{ case (label, child) if label == singleLabel => resolve(tail, child) }
.flatten
case Right(cross) =>
resolve(tail, hierarchy.crossChildren.get._2)
}
case Nil => ???
}
}
resolve(selector, discovered.mirror) match{
case Some(target) =>
val evaluator = new Evaluator(workspacePath, mapping, log.info)
val evaluated = evaluator.evaluate(OSet(target))
evaluated.transitive.foreach{
case t: define.Source => watch(t.handle.path)
case _ => // do nothing
}
val failing = evaluated.failing.items
evaluated.failing.keyCount match{
case 0 => // do nothing
case n => log.error(n + " targets failed")
}
for((k, fs) <- failing){
val ks = k match{
case Left(t) => t.toString
case Right(t) => t.segments.mkString(".")
}
val fss = fs.map{
case Result.Exception(t) => t.toString
case Result.Failure(t) => t
}
log.error(ks + " " + fss.mkString(", "))
}
if (evaluated.failing.keyCount == 0) 0 else 1
case None =>
log.error("Unknown selector: " + selector.mkString("."))
1
}
}
}
}
case class Config(home: ammonite.ops.Path = pwd/'out/'ammonite,
colored: Option[Boolean] = None,
help: Boolean = false,
repl: Boolean = false,
watch: Boolean = false)
def main(args: Array[String]): Unit = {
val startTime = System.currentTimeMillis()
import ammonite.main.Cli.Arg
val signature = Seq(
Arg[Config, Path](
"home", Some('h'),
"The home directory of the REPL; where it looks for config and caches",
(c, v) => c.copy(home = v)
),
Arg[Config, Unit](
"help", None,
"""Print this message""".stripMargin,
(c, v) => c.copy(help = true)
),
Arg[Config, Boolean](
"color", None,
"""Enable or disable colored output; by default colors are enabled
|in both REPL and scripts if the console is interactive, and disabled
|otherwise""".stripMargin,
(c, v) => c.copy(colored = Some(v))
),
Arg[Config, Unit](
"repl", Some('r'),
"Open a build REPL",
(c, v) => c.copy(repl = true)
),
Arg[Config, Unit](
"watch", Some('w'),
"Watch and re-run your build when it changes",
(c, v) => c.copy(watch = true)
)
)
ammonite.main.Cli.groupArgs(args.toList, signature, Config()) match{
case Left(err) =>
case Right((config, leftover)) =>
if (config.help) {
val leftMargin = signature.map(ammonite.main.Cli.showArg(_).length).max + 2
System.err.println(ammonite.main.Cli.formatBlock(signature, leftMargin).mkString("\n"))
System.exit(0)
} else {
val res = new Main(config).run(leftover, startTime)
System.exit(res)
}
}
}
}
class Logger(coloredOutput: Boolean){
val colors =
if(coloredOutput) Colors.Default
else Colors.BlackWhite
def info(s: String) = System.err.println(colors.info()(s))
def error(s: String) = System.err.println(colors.error()(s))
}
class Main(config: Main.Config){
val coloredOutput = config.colored.getOrElse(ammonite.Main.isInteractive())
val log = new Logger(coloredOutput)
def watchAndWait(watched: Seq[(Path, Long)]) = {
log.info(s"Watching for changes to ${watched.length} files... (Ctrl-C to exit)")
def statAll() = watched.forall{ case (file, lastMTime) =>
Interpreter.pathSignature(file) == lastMTime
}
while(statAll()) Thread.sleep(100)
}
def handleWatchRes[T](res: Res[T], printing: Boolean) = res match {
case Res.Failure(msg) =>
log.error(msg)
false
case Res.Exception(ex, s) =>
log.error(
Repl.showException(ex, fansi.Color.Red, fansi.Attr.Reset, fansi.Color.Green)
)
false
case Res.Success(value) =>
if (printing && value != ()) println(pprint.PPrinter.BlackWhite(value))
true
case Res.Skip => true // do nothing on success, everything's already happened
case Res.Exit(_) => ???
}
def run(leftover: List[String], startTime0: Long): Int = {
var exitCode = 0
var startTime = startTime0
val loop = config.watch
do {
val watchedFiles = if (config.repl) {
val repl = ammonite.Main(
predefFile = Some(pwd / "build.sc")
).instantiateRepl(remoteLogger = None).right.get
repl.interp.initializePredef()
repl.run()
repl.interp.watchedFiles
} else {
val interp = ammonite.Main(
predefFile = Some(pwd / "build.sc")
).instantiateInterpreter().right.get
interp.initializePredef()
val syntheticPath = pwd / 'out / "run.sc"
write.over(
syntheticPath,
s"""@main def run(args: String*) = mill.Main(args, ammonite.predef.FilePredef, interp.watch, $coloredOutput)
|
|@main def idea() = mill.scalaplugin.GenIdea(ammonite.predef.FilePredef)
""".stripMargin
)
val res = ammonite.main.Scripts.runScript(
pwd,
syntheticPath,
interp,
Scripts.groupArgs(leftover)
)
res match{
case Res.Success(v: Int) => exitCode = v
case _ => exitCode = 1
}
handleWatchRes(res, false)
interp.watchedFiles
}
val delta = System.currentTimeMillis() - startTime
log.info("Finished in " + delta/1000.0 + "s")
if (loop) watchAndWait(watchedFiles)
startTime = System.currentTimeMillis()
} while(loop)
exitCode
}
}
|