Last active
May 6, 2023 15:40
-
-
Save dacr/32eba591f8fb459dfce43dc2e799548b to your computer and use it in GitHub Desktop.
ZIO learning - playing with streams - find files / published by https://github.com/dacr/code-examples-manager #5d6e5df8-c059-4fe5-a1a2-a9a8233f601a/9f5325770b93b74735955d8cb261a5e8e09ef563
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// summary : ZIO learning - playing with streams - find files | |
// keywords : scala, zio, learning, streams, find, regex, @testable | |
// publish : gist | |
// authors : zio | |
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2) | |
// id : 5d6e5df8-c059-4fe5-a1a2-a9a8233f601a | |
// created-on : 2021-11-28T17:58:10+01:00 | |
// managed-by : https://github.com/dacr/code-examples-manager | |
// run-with : scala-cli $file | |
// --------------------- | |
//> using scala "3.2.2" | |
//> using dep "dev.zio::zio:2.0.13" | |
//> using dep "dev.zio::zio-streams:2.0.13" | |
// --------------------- | |
import zio.* | |
import zio.stream.* | |
import java.nio.file.attribute.BasicFileAttributes | |
import java.nio.file.{Files, Path, Paths} | |
import scala.util.matching.Regex | |
object App extends ZIOAppDefault { | |
case class IssueInvalidSearchPath(th: Throwable) | |
case class IssueInvalidRegexPattern(th: Throwable) | |
case class IssueJavaFind(th: Throwable) | |
case class IssueFindCollectResult(th: Throwable) | |
type FindIssues = IssueInvalidSearchPath | IssueInvalidRegexPattern | IssueJavaFind | IssueFindCollectResult | |
def searchPredicate(ignoreMaskRegex: Option[Regex])(path: Path, attrs: BasicFileAttributes): Boolean = | |
attrs.isRegularFile && ( | |
ignoreMaskRegex.isEmpty || ignoreMaskRegex.get.findFirstIn(path.toString).isDefined | |
) | |
def find(searchRoot: String, findPattern: Option[String]): ZIO[Any, FindIssues, Chunk[Path]] = | |
for | |
searchPath <- ZIO.attempt(Path.of(searchRoot)).mapError(th => IssueInvalidSearchPath(th)) | |
findRegex <- ZIO.attempt(findPattern.map(_.r)).mapError(th => IssueInvalidRegexPattern(th)) | |
javaStream <- ZIO.attempt(Files.find(searchPath, 10, searchPredicate(findRegex))).mapError(th => IssueJavaFind(th)) | |
results <- ZStream.fromJavaStream(javaStream).runCollect.mapError(th => IssueFindCollectResult(th)) | |
yield results | |
override def run = | |
for { | |
results <- find(searchRoot = ".", Some(".*")) | |
_ <- ZIO.foreach(results)(path => Console.printLine(path)) | |
} yield () | |
} | |
App.main(Array.empty) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment