Exit when stdin closes

[mhanberg]

This is useful for long running processes that are started by other tools like web frameworks.

These two lines were taken from the postcss-cli.

[bcomnes]

My apologies, I totally missed this.

Can you explain the problem thats going that this solves?

[mhanberg]

No worries.

To quote someone smarter than me.

Most command line tools (cat, fsevents, etc) and JS CLI watchers (postcss,
webpack, etc) listen to stdin and abort when the stdin is closed (for example,
by sending Ctrl+D). This is important because there is no guarantee the
process who invokes [cpx] will terminate it, but it is guaranteed the stdin
will be closed once the parent dies.

Basically, when I start cpx as a "watcher" with Elixir/Erlang, there is a zombie node process of cpx that persists after the Elixir/Erlang VM exits.

[bcomnes]

Cool, sounds good. I'll run some tests locally to make sure everything is still working as expected.

[bcomnes]

Seems to work fine here. I'll do a release.

[bcomnes]

cpx2@3.0.1

[meteorlxy]

This change somehow breaks my usage with lerna.

You can take this project as a reproduction:

https://github.com/vuepress/vuepress-next/blob/main/package.json

yarn
yarn copy-watch

The yarn copy-watch command works properly with cpx2@3.0.0, but it will exit immediately with cpx2@3.0.1

[bcomnes]

@meteorlxy Sorry about that. Pin to 3.0.0 while we figure this out. @mhanberg any ideas?

[bcomnes]

I'm going to revert the change until we can clarify the issue being solved here more. @mhanberg can you send me a small gist or something with a package.json and whatever scripts you were using that sets up the zombie process issue you ran into?

[bcomnes]

Reverted: cpx2@3.0.2