NDH•2y ago

Run examples on Windows

Anyone know how to run the Piping to files example on Windows? https://deno.land/manual@v1.30.3/examples/subprocess 'yes' is ignored, and I get a final error for the kill request

process.kill("SIGINT");

process.kill("SIGINT");

error: Uncaught PermissionDenied: Access is denied. (os error 5) process.kill("SIGINT");

6 Replies

ioB•2y ago

I believe this api is being deprecated so I think this example should be updated

NDH•2y ago

Will there be any instruction for this example on Windows? What is the replacement for deno.run? Any existing documentation ?

ioB•2y ago

Deno.Command is the alternative there are docs but it's unstable until next major release (1.31.0)

NDH•2y ago

Thanks <:party_deno:1035517691517218847> I've never used this help before. Can I close this?

ioB•2y ago

It just stays open but you can rename the title to make it clear you don't still need help though honestly I would avoid doing that until you have whatever you wanted to have working working

NDH•2y ago

Thanks again. For anyone else!

/**
 * subprocess_piping_to_file.ts
 */

import { mergeReadableStreams } from "https://deno.land/std@0.177.0/streams/merge_readable_streams.ts";

// create the file to attach the process to
const file = await Deno.open("./process_output.txt", {
  read: true,
  write: true,
  create: true,
});

// start the process
const process = Deno.run({
  //
  // changed this from ["yes"] to ["cmd", "clear"]
  //
  cmd: ["cmd", "clear"],
  stdout: "piped",
  stderr: "piped",
});

// example of combining stdout and stderr while sending to a file
const joined = mergeReadableStreams(
  process.stdout.readable,
  process.stderr.readable,
);

// returns a promise that resolves when the process is killed/closed
joined.pipeTo(file.writable).then(() => console.log("pipe join done"));

// manually stop process "yes" will never end on its own
setTimeout(() => {

  //
  // changed this from SIGINT to SIGTERM
  //
  process.kill("SIGTERM");  
  process.close()
}, 1000);

/**
 * subprocess_piping_to_file.ts
 */

import { mergeReadableStreams } from "https://deno.land/std@0.177.0/streams/merge_readable_streams.ts";

// create the file to attach the process to
const file = await Deno.open("./process_output.txt", {
  read: true,
  write: true,
  create: true,
});

// start the process
const process = Deno.run({
  //
  // changed this from ["yes"] to ["cmd", "clear"]
  //
  cmd: ["cmd", "clear"],
  stdout: "piped",
  stderr: "piped",
});

// example of combining stdout and stderr while sending to a file
const joined = mergeReadableStreams(
  process.stdout.readable,
  process.stderr.readable,
);

// returns a promise that resolves when the process is killed/closed
joined.pipeTo(file.writable).then(() => console.log("pipe join done"));

// manually stop process "yes" will never end on its own
setTimeout(() => {

  //
  // changed this from SIGINT to SIGTERM
  //
  process.kill("SIGTERM");  
  process.close()
}, 1000);