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Refactor PackageResolver out of MainModule
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core/src/main/scala/org/bykn/bosatsu/tool/PackageResolver.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package org.bykn.bosatsu.tool | ||
|
|
||
| import cats.data.NonEmptyList | ||
| import org.bykn.bosatsu.{PackageName, PlatformIO} | ||
| import cats.syntax.all._ | ||
| import com.monovore.decline.Opts | ||
|
|
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| /** This is a class that names packages based on path and finds packages | ||
| * based on imports | ||
| */ | ||
| sealed abstract class PackageResolver[IO[_], Path] { | ||
| def pathFor(name: PackageName)(io: PlatformIO[IO, Path]): IO[Option[Path]] | ||
| def packageNameFor(path: Path)(io: PlatformIO[IO, Path]): Option[PackageName] | ||
| } | ||
| object PackageResolver { | ||
| case class ExplicitOnly[IO[_], Path]() extends PackageResolver[IO, Path] { | ||
| def pathFor(name: PackageName)(io: PlatformIO[IO, Path]): IO[Option[Path]] = | ||
| io.moduleIOMonad.pure(Option.empty[Path]) | ||
| def packageNameFor(path: Path)(io: PlatformIO[IO, Path]): Option[PackageName] = None | ||
| } | ||
|
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| case class LocalRoots[IO[_], Path]( | ||
| roots: NonEmptyList[Path], | ||
| optResolvePath: Option[(Path, PackageName) => IO[Option[Path]]] | ||
| ) extends PackageResolver[IO, Path] { | ||
| def pathFor(name: PackageName)(io: PlatformIO[IO, Path]): IO[Option[Path]] = | ||
| optResolvePath match { | ||
| case None => io.moduleIOMonad.pure(Option.empty[Path]) | ||
| case Some(resolvePath) => | ||
| import io.moduleIOMonad | ||
|
|
||
| def step(p: List[Path]): IO[Either[List[Path], Option[Path]]] = | ||
| p match { | ||
| case Nil => | ||
| io.moduleIOMonad.pure(Right[List[Path], Option[Path]](None)) | ||
| case phead :: ptail => | ||
| resolvePath(phead, name).map { | ||
| case None => Left[List[Path], Option[Path]](ptail) | ||
| case some @ Some(_) => | ||
| Right[List[Path], Option[Path]](some) | ||
| } | ||
| } | ||
|
|
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| moduleIOMonad.tailRecM(roots.toList)(step) | ||
| } | ||
|
|
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| def packageNameFor(path: Path)(io: PlatformIO[IO, Path]): Option[PackageName] = | ||
| io.pathPackage(roots.toList, path) | ||
| } | ||
|
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|
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| private def packRoot[IO[_], Path](platformIO: PlatformIO[IO, Path]): Opts[NonEmptyList[Path]] = { | ||
| import platformIO.pathArg | ||
| Opts.options[Path]( | ||
| "package_root", | ||
| help = "for implicit package names, consider these paths as roots" | ||
| ) | ||
| } | ||
|
|
||
| private def packSearch[IO[_], Path]( | ||
| platformIO: PlatformIO[IO, Path] | ||
| ): Opts[Option[(Path, PackageName) => IO[Option[Path]]]] = | ||
| Opts | ||
| .flag( | ||
| "search", | ||
| help = | ||
| "if set, we search the package_roots for imports not explicitly given" | ||
| ) | ||
| .orFalse | ||
| .map { | ||
| case true => Some((p, pn) => platformIO.resolveFile(p, pn)) | ||
| case false => None | ||
| } | ||
|
|
||
| def opts[IO[_], Path](platformIO: PlatformIO[IO, Path]): Opts[PackageResolver[IO, Path]] = | ||
| (packRoot(platformIO) | ||
| .product(packSearch(platformIO))) | ||
| .orNone | ||
| .map { | ||
| case None => PackageResolver.ExplicitOnly() | ||
| case Some((paths, search)) => | ||
| PackageResolver.LocalRoots(paths, search) | ||
| } | ||
|
|
||
| // type-checking and writing protos should be explicit. search option isn't supported | ||
| def noSearchOpts[IO[_], Path](platformIO: PlatformIO[IO, Path]): Opts[PackageResolver[IO, Path]] = | ||
| packRoot(platformIO) | ||
| .orNone | ||
| .map { | ||
| case None => PackageResolver.ExplicitOnly() | ||
| case Some(paths) => PackageResolver.LocalRoots(paths, None) | ||
| } | ||
| } |