[Bug]: jekyll serve does not detach when spawned without shell

[thekief]

Operating System

Ubuntu 22.04.3 LTS

Ruby Version

ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux-gnu]

Jekyll Version

jekyll-4.3.2

GitHub Pages Version

No response

Expected Behavior

Once the command

bundle exec jekyll serve --detach --config _config.yml,pdf/assets/config_pdf.yml

outputs

Server detached with pid '3816'. Run `pkill -f jekyll' or `kill -9 3816' to stop the server.

the process successfully detaches.

Current Behavior

I use an application to modify some files and eventually start jekyll, using the command

bundle exec jekyll serve --detach --config _config.yml,pdf/assets/config_pdf.yml

I had to add some stages after the spawn and noticed that the commands seems to hang. I had two implementations, one in Swift using ShellOut [1] and one in Rust [2] using cmd_lib. The above behaviour is replicable in both implementations.

[1] https://github.com/JohnSundell/ShellOut
[2] https://github.com/rust-shell-script/rust_cmd_lib

Relevant log output

Jekyll Spaceship: 🚀 Jekyll-Spaceship 0.10.2
  Jekyll Spaceship: 🎉 A Jekyll plugin to provide powerful supports.
  Jekyll Spaceship: 👉 https://github.com/jeffreytse/jekyll-spaceship
Configuration file: /doc/stuff/_config.yml
Configuration file: /doc/stuff/pdf/assets/config_pdf.yml
  Jekyll Spaceship: 🗂  use plantuml-processor
            Source: /doc/stuff
       Destination: /doc/stuff/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
  Jekyll Spaceship: [PlantumlProcessor] docs/stuff.md
[INFO  cmd_lib::child]      Build Warning: Layout 'page_print' requested in assets/js/stuff-docs.js does not exist.
[INFO  cmd_lib::child]      Build Warning: Layout 'page_print' requested in assets/js/zzzz-search-data.json does not exist.
                    done in 0.22 seconds.
 Auto-regeneration: disabled when running server detached.
    Server address: http://127.0.0.1:4010/
Server detached with pid '3816'. Run `pkill -f jekyll' or `kill -9 3816' to stop the server.


```sh
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Bundle complete! 6 Gemfile dependencies, 37 gems now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.

Code Sample

  ...
  run_cmd!(bundle exec jekyll serve --detach --config _config.yml,pdf/assets/config_pdf.yml);
  ...

  ...
  let output = try shellOut(to: [pwd.cd, "bundle exec jekyll serve --detach --config _config.yml,pdf/assets/config_pdf.yml"])
  ...

[ntkme]

The root cause was an issue with sass-embedded not handling fork properly, and this should have been fixed by just released 1.69.6.

[mattr-]

Closing this since it appears there is a fix availble.