this post was submitted on 21 Jul 2023
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Programming

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Ditching Docker for Local Development (lgug2z.com)
submitted 1 year ago by [email protected] to c/programming
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Some folks on the internet were interested in how I had managed to ditch Docker for local development. This is a slightly overdue write up on how I typically do things now with Nix, Overmind and Just.

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[–] CodeBlooded 2 points 1 year ago (1 children)

I’ll certainly give this a read!

Are you saying that nix will cache all the dependencies within itself/its “container,” or whatever its container replacement would be called?

[–] uthredii 1 points 1 year ago

Are you saying that nix will cache all the dependencies within itself/its “container,” or whatever its container replacement would be called?

Yep, sort of.

It saves each version of your dependencies to the /nix/store folder with a checksum prefixing the program name. For example you might have the following Firefox programs

/nix/store/l7ih0zcw2csi880kfcq37lnl295r44pj-firefox-100.0.2
/nix/store/cm1bdi4hp8g8ic5jxqjhzmm7gl3a6c46-firefox-108.0.1
/nix/store/rfr0n62z21ymi0ljj04qw2d7fgy2ckrq-firefox-114.0.1

Because of this you can largely avoid dependency conflicts. For example a program A could depend on /nix/store/cm1bdi4hp8g8ic5jxqjhzmm7gl3a6c46-firefox-108.0.1 and a program B could depend on /nix/store/rfr0n62z21ymi0ljj04qw2d7fgy2ckrq-firefox-114.0.1 and both programs would work as both have dependencies satisfied. AFAIK using other build systems you would have to break program A or program B (or find versions of program A and program B where both dependencies are satisfied).