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Merge pull request #15212 from dotty-staging/main-generic-compiler
implement scalac script in Scala
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| package dotty.tools | ||
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| import scala.language.unsafeNulls | ||
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| import scala.annotation.tailrec | ||
| import scala.io.Source | ||
| import scala.util.Try | ||
| import java.io.File | ||
| import java.lang.Thread | ||
| import scala.annotation.internal.sharable | ||
| import dotty.tools.dotc.util.ClasspathFromClassloader | ||
| import dotty.tools.runner.ObjectRunner | ||
| import dotty.tools.dotc.config.Properties.envOrNone | ||
| import dotty.tools.io.Jar | ||
| import dotty.tools.runner.ScalaClassLoader | ||
| import java.nio.file.Paths | ||
| import dotty.tools.dotc.config.CommandLineParser | ||
| import dotty.tools.scripting.StringDriver | ||
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| enum CompileMode: | ||
| case Guess | ||
| case Compile | ||
| case Decompile | ||
| case PrintTasty | ||
| case Script | ||
| case Repl | ||
| case Run | ||
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| case class CompileSettings( | ||
| verbose: Boolean = false, | ||
| classPath: List[String] = List.empty, | ||
| compileMode: CompileMode = CompileMode.Guess, | ||
| exitCode: Int = 0, | ||
| javaArgs: List[String] = List.empty, | ||
| javaProps: List[(String, String)] = List.empty, | ||
| scalaArgs: List[String] = List.empty, | ||
| residualArgs: List[String] = List.empty, | ||
| scriptArgs: List[String] = List.empty, | ||
| targetScript: String = "", | ||
| compiler: Boolean = false, | ||
| quiet: Boolean = false, | ||
| colors: Boolean = false, | ||
| ) { | ||
| def withCompileMode(em: CompileMode): CompileSettings = this.compileMode match | ||
| case CompileMode.Guess => | ||
| this.copy(compileMode = em) | ||
| case _ => | ||
| println(s"compile_mode==[$compileMode], attempted overwrite by [$em]") | ||
| this.copy(exitCode = 1) | ||
| end withCompileMode | ||
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| def withScalaArgs(args: String*): CompileSettings = | ||
| this.copy(scalaArgs = scalaArgs.appendedAll(args.toList.filter(_.nonEmpty))) | ||
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| def withJavaArgs(args: String*): CompileSettings = | ||
| this.copy(javaArgs = javaArgs.appendedAll(args.toList.filter(_.nonEmpty))) | ||
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| def withJavaProps(args: (String, String)*): CompileSettings = | ||
| this.copy(javaProps = javaProps.appendedAll(args.toList)) | ||
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| def withResidualArgs(args: String*): CompileSettings = | ||
| this.copy(residualArgs = residualArgs.appendedAll(args.toList.filter(_.nonEmpty))) | ||
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| def withScriptArgs(args: String*): CompileSettings = | ||
| this.copy(scriptArgs = scriptArgs.appendedAll(args.toList.filter(_.nonEmpty))) | ||
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| def withTargetScript(file: String): CompileSettings = | ||
| Try(Source.fromFile(file)).toOption match | ||
| case Some(_) => this.copy(targetScript = file) | ||
| case None => | ||
| println(s"not found $file") | ||
| this.copy(exitCode = 2) | ||
| end withTargetScript | ||
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| def withCompiler: CompileSettings = | ||
| this.copy(compiler = true) | ||
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| def withQuiet: CompileSettings = | ||
| this.copy(quiet = true) | ||
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| def withColors: CompileSettings = | ||
| this.copy(colors = true) | ||
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| def withNoColors: CompileSettings = | ||
| this.copy(colors = false) | ||
| } | ||
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| object MainGenericCompiler { | ||
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| val classpathSeparator = File.pathSeparator | ||
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| @sharable val javaOption = raw"""-J(.*)""".r | ||
| @sharable val javaPropOption = raw"""-D(.+?)=(.?)""".r | ||
| @tailrec | ||
| def process(args: List[String], settings: CompileSettings): CompileSettings = args match | ||
| case Nil => | ||
| settings | ||
| case "--" :: tail => | ||
| process(Nil, settings.withResidualArgs(tail.toList*)) | ||
| case ("-v" | "-verbose" | "--verbose") :: tail => | ||
| process(tail, settings.withScalaArgs("-verbose")) | ||
| case ("-q" | "-quiet") :: tail => | ||
| process(tail, settings.withQuiet) | ||
| case "-repl" :: tail => | ||
| process(tail, settings.withCompileMode(CompileMode.Repl)) | ||
| case "-script" :: targetScript :: tail => | ||
| process(Nil, settings | ||
| .withCompileMode(CompileMode.Script) | ||
| .withJavaProps("script.path" -> targetScript) | ||
| .withTargetScript(targetScript) | ||
| .withScriptArgs(tail*)) | ||
| case "-compile" :: tail => | ||
| process(tail, settings.withCompileMode(CompileMode.Compile)) | ||
| case "-decompile" :: tail => | ||
| process(tail, settings.withCompileMode(CompileMode.Decompile)) | ||
| case "-print-tasty" :: tail => | ||
| process(tail, settings.withCompileMode(CompileMode.PrintTasty)) | ||
| case "-run" :: tail => | ||
| process(tail, settings.withCompileMode(CompileMode.Run)) | ||
| case "-colors" :: tail => | ||
| process(tail, settings.withColors) | ||
| case "-no-colors" :: tail => | ||
| process(tail, settings.withNoColors) | ||
| case "-with-compiler" :: tail => | ||
| process(tail, settings.withCompiler) | ||
| case ("-cp" | "-classpath" | "--class-path") :: cp :: tail => | ||
| val (tailargs, newEntries) = MainGenericRunner.processClasspath(cp, tail) | ||
| process(tailargs, settings.copy(classPath = settings.classPath ++ newEntries.filter(_.nonEmpty))) | ||
| case "-Oshort" :: tail => | ||
| // Nothing is to be done here. Request that the user adds the relevant flags manually. | ||
| // i.e this has no effect when MainGenericRunner is invoked programatically. | ||
| val addTC="-XX:+TieredCompilation" | ||
| val tStopAtLvl="-XX:TieredStopAtLevel=1" | ||
| println(s"ignoring deprecated -Oshort flag, please add `-J$addTC` and `-J$tStopAtLvl` flags manually") | ||
| process(tail, settings) | ||
| case javaOption(stripped) :: tail => | ||
| process(tail, settings.withJavaArgs(stripped)) | ||
| case javaPropOption(opt, value) :: tail => | ||
| process(tail, settings.withJavaProps(opt -> value)) | ||
| case arg :: tail => | ||
| process(tail, settings.withResidualArgs(arg)) | ||
| end process | ||
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| def main(args: Array[String]): Unit = | ||
| val settings = process(args.toList, CompileSettings()) | ||
| if settings.exitCode != 0 then System.exit(settings.exitCode) | ||
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| def classpathSetting = | ||
| if settings.classPath.isEmpty then List() | ||
| else List("-classpath", settings.classPath.mkString(classpathSeparator)) | ||
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| def reconstructedArgs() = | ||
| classpathSetting ++ settings.scalaArgs ++ settings.residualArgs | ||
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| def addJavaProps(): Unit = | ||
| settings.javaProps.foreach { (k, v) => sys.props(k) = v } | ||
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| def run(settings: CompileSettings): Unit = settings.compileMode match | ||
| case CompileMode.Compile => | ||
| addJavaProps() | ||
| val properArgs = reconstructedArgs() | ||
| dotty.tools.dotc.Main.main(properArgs.toArray) | ||
| case CompileMode.Decompile => | ||
| addJavaProps() | ||
| val properArgs = reconstructedArgs() | ||
| dotty.tools.dotc.decompiler.Main.main(properArgs.toArray) | ||
| case CompileMode.PrintTasty => | ||
| addJavaProps() | ||
| val properArgs = reconstructedArgs() | ||
| dotty.tools.dotc.core.tasty.TastyPrinter.main(properArgs.toArray) | ||
| case CompileMode.Script => // Naive copy from scalac bash script | ||
| addJavaProps() | ||
| val properArgs = | ||
| reconstructedArgs() | ||
| ++ List("-script", settings.targetScript) | ||
| ++ settings.scriptArgs | ||
| scripting.Main.main(properArgs.toArray) | ||
| case CompileMode.Repl | CompileMode.Run => | ||
| addJavaProps() | ||
| val properArgs = reconstructedArgs() | ||
| repl.Main.main(properArgs.toArray) | ||
| case CompileMode.Guess => | ||
| run(settings.withCompileMode(CompileMode.Compile)) | ||
| end run | ||
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| run(settings) | ||
| end main | ||
| } |
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