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| //> using scala 3.4.2 | |
| //> using platform native | |
| //> using nativeVersion 0.4.17 | |
| //> using packaging.output checkLineLenght | |
| //> using nativeMode debug | |
| //> using nativeLto none | |
| //> using nativeGc none | |
| //> using toolkit typelevel::latest | |
| import cats.syntax.all.* | |
| import cats.effect.{ExitCode, IO, IOApp} | |
| import cats.effect.std.Console | |
| import fs2.Stream | |
| import fs2.io.file.{Files, Path} | |
| import com.monovore.decline.effect.CommandIOApp | |
| import com.monovore.decline.Opts | |
| import fs2.concurrent.SignallingRef | |
| val header: String = | |
| "Checks recursively for text file with a line length exceeding the passed value" | |
| object checkLineLenght extends CommandIOApp("checkLineLength", header): | |
| override def main: Opts[IO[ExitCode]] = Opts.argument[Long]("max-line-lenght").map( | |
| check(_)(defaultFilters).asErrorCode | |
| ) | |
| def check(maxLineLenght: Long)(filters: List[Filter]): IO[Boolean] = | |
| for | |
| cwd <- Files[IO].currentWorkingDirectory | |
| success <- SignallingRef[IO, Boolean](true) | |
| _ <- Files[IO] | |
| .walk(cwd) | |
| .filters(filters) | |
| .map(cwd.relativize) | |
| .readLineLength | |
| .printIfLongerThan(maxLineLenght)(success) | |
| .compile.drain | |
| result <- success.get | |
| yield result | |
| end checkLineLenght | |
| val defaultFilters: List[Filter] = List( | |
| Filter.Negative(_.absolute.names.exists(_.toString === "target")), | |
| Filter.Negative(_.absolute.names.exists(_.toString.startsWith("."))), | |
| Filter.PositiveF(Files[IO].isRegularFile), | |
| Filter.PositiveF(Files[IO].isReadable), | |
| Filter.NegativeF(Files[IO].isExecutable), | |
| ) | |
| extension (iob: IO[Boolean]) | |
| def asErrorCode: IO[ExitCode] = iob.ifF(ExitCode.Success, ExitCode.Error) | |
| extension (s: Stream[IO, Path]) | |
| def filters(filters: List[Filter]): Stream[IO, Path] = filters.foldLeft(s): | |
| case (s, Filter.Positive(f)) => s.filter(f) | |
| case (s, Filter.Negative(f)) => s.filterNot(f) | |
| case (s, Filter.PositiveF(f)) => s.evalFilterAsync(10)(f) | |
| case (s, Filter.NegativeF(f)) => s.evalFilterNotAsync(10)(f) | |
| def readLineLength: Stream[IO, (String, Int)] = s.flatMap: path => | |
| Files[IO].readUtf8Lines(path) | |
| .zipWithIndex.map((s, i) => (s"${path.toString}:${i + 1}", s.length)) | |
| extension (s: Stream[IO, (String, Int)]) | |
| def printIfLongerThan(maxLineLenght: Long)(success: SignallingRef[IO, Boolean]) | |
| : Stream[IO, Unit] = s.parEvalMapUnorderedUnbounded((i, length) => | |
| Console[IO].errorln(i).flatMap(_ => success.set(false)).whenA(length > maxLineLenght) | |
| ) | |
| enum Filter: | |
| case Positive(f: Path => Boolean) | |
| case Negative(f: Path => Boolean) | |
| case PositiveF(f: Path => IO[Boolean]) | |
| case NegativeF(f: Path => IO[Boolean]) |
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