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ProcessesPlatform.scala
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ProcessesPlatform.scala
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/*
* Copyright (c) 2013 Functional Streams for Scala
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package fs2
package io
package process
import cats.effect.kernel.Async
import cats.effect.kernel.Resource
import cats.syntax.all._
import fs2.io.CollectionCompat._
import java.lang
private[process] trait ProcessesCompanionPlatform {
def forAsync[F[_]](implicit F: Async[F]): Processes[F] = new UnsealedProcesses[F] {
def spawn(process: ProcessBuilder): Resource[F, Process[F]] =
Resource
.make {
F.blocking {
val builder = new lang.ProcessBuilder((process.command :: process.args).asJava)
process.workingDirectory.foreach { path =>
builder.directory(path.toNioPath.toFile)
}
val env = builder.environment()
if (!process.inheritEnv) env.clear()
process.extraEnv.foreach { case (k, v) =>
env.put(k, v)
}
builder.start()
}
} { process =>
F.delay(process.isAlive())
.ifM(
F.blocking {
process.destroy()
process.waitFor()
()
},
F.unit
)
}
.map { process =>
new UnsealedProcess[F] {
def isAlive = F.delay(process.isAlive())
def exitValue = isAlive.ifM(
F.interruptible(process.waitFor()),
F.delay(process.exitValue())
)
def stdin = writeOutputStreamCancelable(
F.delay(process.getOutputStream()),
F.blocking(process.destroy())
)
def stdout = readInputStreamCancelable(
F.delay(process.getInputStream()),
F.blocking(process.destroy()),
8192
)
def stderr = readInputStreamCancelable(
F.delay(process.getErrorStream()),
F.blocking(process.destroy()),
8192
)
}
}
}
}