2024-03-17 17:33:12 +01:00
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# Nix samples
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## Existing samples
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* hello-world: Sample local C program;
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* hello-world-github: Some github hosted program, built against Wayland;
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* hello-world-callpackage: A basic callPackage usage;
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* hello-world-go: Basic usage of buildGoModule;
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* hello-world-docker: A docker image of a binary extracted from another derivation;
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* simple-shell: Some shells;
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* hello-versions: Choosing some package version;
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* samples: A directory with found exicting recipes!
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2024-03-19 07:46:33 +01:00
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* flake-basic: A really basic flake
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* flake-basic-platform: A slighly more complex flake, with more targets
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* flake-mkDerivation: A flake with a ... mkDerivation
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* flake-rust-devshell: A flake with a rust overlay
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2024-03-17 17:33:12 +01:00
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## Building, running, deleting
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### hello-world
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```sh
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> cd /path/to/nix-samples
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> nix-build hello-world/default.nix
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this derivation will be built:
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/nix/store/rwi8d1fv4hnpl194pi2cj7ikph2k5ny8-hello.drv
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building '/nix/store/rwi8d1fv4hnpl194pi2cj7ikph2k5ny8-hello.drv'...
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Running phase: unpackPhase
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unpacking source archive /nix/store/29265kg6m3mzgf7rhfqjx34dwhgn9p4g-src
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...
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stripping (with command strip and flags -S -p) in /nix/store/4nzxqrm1gddddwlz55c2q398p0si4qhf-hello/bin
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/nix/store/4nzxqrm1gddddwlz55c2q398p0si4qhf-hello
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> nix profile install /nix/store/4nzxqrm1gddddwlz55c2q398p0si4qhf-hello
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> nix profile list
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Name: hello
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Store paths: /nix/store/4nzxqrm1gddddwlz55c2q398p0si4qhf-hello
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> hello
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/home/mycroft/.nix-profile/bin/hello
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```
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Note: `~/.nix-profile/bin` was added in $PATH.
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Prior to remove it, it must be unlinked from the profile and the build:
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```sh
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> nix-store --query --roots /nix/store/4nzxqrm1gddddwlz55c2q398p0si4qhf-hello
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/home/mycroft/.local/state/nix/profiles/profile-7-link -> /nix/store/53zlkdqd1m2wdgi2a9q390ld9gkkkydf-profile
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/home/mycroft/dev/nix-samples/result -> /nix/store/4nzxqrm1gddddwlz55c2q398p0si4qhf-hello
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> nix profile remove /nix/store/4nzxqrm1gddddwlz55c2q398p0si4qhf-hello
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removing 'hello'
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>
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```
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It will be needed to wipe the profile history and the `result` link to be able to `nix-store --delete` or `nix-collect-garbage`.
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## Resources
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* callPackage: https://summer.nixos.org/blog/callpackage-a-tool-for-the-lazy/
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* dockerfiles:
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* https://nix.dev/tutorials/nixos/building-and-running-docker-images.html
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* https://mitchellh.com/writing/nix-with-dockerfiles
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* https://jameswillia.ms/posts/go-nix-containers.html
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2024-03-19 07:46:33 +01:00
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