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package dotty.tools
package dotc
import core.Contexts.Context
import reporting.Reporter
import java.io.EOFException
import scala.annotation.tailrec
/** A compiler which stays resident between runs. This is more of a PoC than
* something that's expected to be used often
*
* Usage:
*
* > scala dotty.tools.dotc.Resident <options> <initial files>
*
* dotc> "more options and files to compile"
*
* ...
*
* dotc> :reset // reset all options to the ones passed on the command line
*
* ...
*
* dotc> :q // quit
*/
class Resident extends Driver {
object residentCompiler extends Compiler
override def newCompiler(implicit ctx: Context): Compiler = ???
override def sourcesRequired = false
private val quit = ":q"
private val reset = ":reset"
private val prompt = "dotc> "
private def getLine() = {
Console.print(prompt)
try scala.io.StdIn.readLine() catch { case _: EOFException => quit }
}
final override def process(args: Array[String], rootCtx: Context): Reporter = {
@tailrec def loop(args: Array[String], prevCtx: Context): Reporter = {
var (fileNames, ctx) = setup(args, prevCtx)
doCompile(residentCompiler, fileNames)(ctx)
var nextCtx = ctx
var line = getLine()
while (line == reset) {
nextCtx = rootCtx
line = getLine()
}
if (line.startsWith(quit)) ctx.reporter
else loop(line split "\\s+", nextCtx)
}
loop(args, rootCtx)
}
}
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