daemon: don't use Popen on linux/mac #4262
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We used `Popen` just to provide a general way of launching our daemons on both Windows and *nix, but it is causing us issues when dvc is launched from some exotic places (like nix package) or through `main()` helper from a script that is not dvc. This patch makes us just use `main()` directly in our double-forked process. Windows implementation has to use the `Popen` mechanism, because this is the only way to daemonize a process on Windows. This means that dvc on Windows is still susceptible to this problem, but there is nothing we can do about it right now :( Fixes iterative#4206 Fixes iterative#4165
pared
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Jul 23, 2020
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We used
Popenjust to provide a general way of launching our daemonson both Windows and *nix, but it is causing us issues when dvc is
launched from some exotic places (like nix package) or through
main()helper from a script that is not dvc.
This patch makes us just use
main()directly in our double-forkedprocess.
Windows implementation has to use the
Popenmechanism, because this isthe only way to daemonize a process on Windows. This means that dvc on
Windows is still susceptible to this problem, but there is nothing we
can do about it right now :(
Fixes #4206
Fixes #4165
❗ I have followed the Contributing to DVC checklist.
📖 If this PR requires documentation updates, I have created a separate PR (or issue, at least) in dvc.org and linked it here.
❌ I will check DeepSource, CodeClimate, and other sanity checks below. (We consider them recommendatory and don't expect everything to be addressed. Please fix things that actually improve code or fix bugs.)
Thank you for the contribution - we'll try to review it as soon as possible. 🙏