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package mill
package playlib
package worker
import java.io.File
import ammonite.ops.Path
import mill.api.{Ctx, Result}
import mill.eval.PathRef
import mill.playlib.api.{RouteCompilerType, RouteCompilerWorkerApi}
import mill.scalalib.api.CompilationResult
import play.routes.compiler
import play.routes.compiler.RoutesCompiler.RoutesCompilerTask
import play.routes.compiler.{InjectedRoutesGenerator, RoutesCompilationError, RoutesCompiler, RoutesGenerator}
private[playlib] class RouteCompilerWorker extends RouteCompilerWorkerApi {
override def compile(files: Seq[Path],
additionalImports: Seq[String],
forwardsRouter: Boolean,
reverseRouter: Boolean,
namespaceReverseRouter: Boolean,
generatorType: RouteCompilerType,
dest: Path)
(implicit ctx: mill.api.Ctx): mill.api.Result[CompilationResult] = {
generatorType match {
case RouteCompilerType.InjectedGenerator =>
val result = compileWithPlay(files, additionalImports, forwardsRouter, reverseRouter,
namespaceReverseRouter, dest, ctx, InjectedRoutesGenerator)
asMillResult(ctx, result)
case RouteCompilerType.StaticGenerator =>
Result.Failure("Static generator was deprecated in 2.6.0 then removed in 2.7.x, see https://www.playframework.com/documentation/2.7.x/Migration27#StaticRoutesGenerator-removed")
}
}
// the following code is duplicated between play worker versions because it depends on play types
// which are not guaranteed to stay the same between versions even though they are currently
// identical
private def compileWithPlay(files: Seq[Path],
additionalImports: Seq[String],
forwardsRouter: Boolean,
reverseRouter: Boolean,
namespaceReverseRouter: Boolean,
dest: Path,
ctx: Ctx,
routesGenerator: RoutesGenerator): Either[Seq[compiler.RoutesCompilationError], Seq[File]] = {
val seed: Either[Seq[compiler.RoutesCompilationError], List[File]] = Right(List.empty[File])
files.map(file => compileWithPlay(file, additionalImports, forwardsRouter, reverseRouter,
namespaceReverseRouter, dest, ctx, routesGenerator)).foldLeft(seed) {
case (Right(accFiles), Right(files)) => Right(accFiles ++ files)
case (Right(accFiles), Left(errors)) => Left(errors)
case (left@Left(errors), _) => left
}
}
private def compileWithPlay(file: Path, additionalImports: Seq[String], forwardsRouter: Boolean, reverseRouter: Boolean, namespaceReverseRouter: Boolean, dest: Path, ctx: Ctx, routesGenerator: RoutesGenerator) = {
ctx.log.debug(s"compiling file $file with play generator $routesGenerator")
val result =
RoutesCompiler.compile(
RoutesCompilerTask(file.toIO, additionalImports, forwardsRouter, reverseRouter,
namespaceReverseRouter),
generator = routesGenerator,
generatedDir = dest.toIO
)
ctx.log.debug(s"compilation result: $result")
result
}
private def asMillResult(ctx: Ctx, result: Either[Seq[RoutesCompilationError], Seq[File]]): Result[CompilationResult] = {
result match {
case Right(_) =>
val zincFile = ctx.dest / 'zinc
Result.Success(CompilationResult(zincFile, PathRef(ctx.dest)))
case Left(errors) =>
val errorMsg = errors.map(error =>
s"compilation error in ${error.source.getPath} at line ${error.line.getOrElse("?")}, " +
s"column ${error.column.getOrElse("?")}: ${error.message}")
.mkString("\n")
Result.Failure("Unable to compile play routes, " + errorMsg)
}
}
}
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