mirror of https://github.com/foo-dogsquared/wiki.git synced 2025-02-12 06:19:06 +00:00

Gabriel Arazas edc686c25c Update wiki on various topics

This update is too large, I made too many notes on stuff. Nonetheless,
it is very nice to see progress. I've made note revisions on the
following topics:

- Learning
- Writing
- Various Linux-related stuff

I've yet to start learning illustration but I'll be starting tomorrow
for an update how do I keep in mind with those writings. There are still
a lot of things to be processed from the backlog with yet more notes on
learning but I keep having those perspectives whenever I practice so
ehhh... Better have those than nothing?

Furthermore, I've also updated the timestamp format. It is pretty simple
to update all of the notes with a couple of `sed` calls.

Aaaand, I've also changed the way how the assets stored with the folders
only leaving it up for the generated files instead of enforcing it on
every note. I create more visual aids and managing them is a pain for
each note. This restructuring frees me of that burden.

2021-07-20 19:52:43 +08:00

4.2 KiB

Raw Blame History

Nix flakes

As of 2021-06-30, the version used for this note is at v2.3 so it needs to be invoked with the unstable version.

similar to Guix channels
a collection of packages and functions while making it easy to configure Nix declaratively
replaces the traditional Nix channels since fully reproducing an environment with Nix requires special care in practice; plus, there's no standard way of composing projects with Nix
as of 2021-06-30, this is on the unstable version of the Nix package manager and needs some additional configuration

why flakes?

provides a structure for discoverability
makes 100% reproducibility a little easier with Nix
in case you're using NixOS, it also provides an easier way to extend it with third-party custom modules

Here's an example to interact with a flake. It will show the entire outputs of a flake as well as the normalized version of the flake object.

#! nix-shell -i bash -p nixUnstable
nix --experimental-features 'nix-command flakes' flake show <<flake-sample-object()>> | sed -e "s/\x1b\[.\{1,5\}m//g"

github:edolstra/dwarffs/f691e2c991e75edb22836f1dbe632c40324215c5
├───checks
│   ├───aarch64-linux
│   │   ├───build: derivation 'dwarffs-0.1.20210121.f691e2c'
│   │   └───test: derivation 'vm-test-run-unnamed'
│   ├───i686-linux
│   │   ├───build: derivation 'dwarffs-0.1.20210121.f691e2c'
│   │   └───test: derivation 'vm-test-run-unnamed'
│   └───x86_64-linux
│       ├───build: derivation 'dwarffs-0.1.20210121.f691e2c'
│       └───test: derivation 'vm-test-run-unnamed'
├───defaultPackage
│   ├───aarch64-linux: package 'dwarffs-0.1.20210121.f691e2c'
│   ├───i686-linux: package 'dwarffs-0.1.20210121.f691e2c'
│   └───x86_64-linux: package 'dwarffs-0.1.20210121.f691e2c'
├───nixosModules
│   └───dwarffs: NixOS module
└───overlay: Nixpkgs overlay

Let's build from one of the outputs of call_flake-sample-object().

#! nix-shell -i bash -p nixUnstable
nix --experimental-features 'nix-command flakes' build 'github:edolstra/dwarffs#checks.aarch64-linux.build'

nix --experimental-features 'nix-command flakes' shell 'github:edolstra/dwarffs' --command dwarffs --version

fusermount version: 2.9.9

For full reproducibility, you can refer to specific point of a flake (e.g., commit).

To easily get a pinned URL, you can run flake metadata subcommand.

#! nix-shell -i bash -p nixUnstable
nix --experimental-features 'nix-command flakes' flake metadata 'github:edolstra/dwarffs' | sed -e "s/\x1b\[.\{1,5\}m//g"

Resolved URL:  github:edolstra/dwarffs
Locked URL:    github:edolstra/dwarffs/f691e2c991e75edb22836f1dbe632c40324215c5
Description:   A filesystem that fetches DWARF debug info from the Internet on demand
Path:          /nix/store/769s05vjydmc2lcf6b02az28wsa9ixh1-source
Revision:      f691e2c991e75edb22836f1dbe632c40324215c5
Last modified: 2021-01-21 22:41:26
Inputs:
├───nix: github:NixOS/nix/6254b1f5d298ff73127d7b0f0da48f142bdc753c
│   ├───lowdown-src: github:kristapsdz/lowdown/1705b4a26fbf065d9574dce47a94e8c7c79e052f
│   └───nixpkgs: github:NixOS/nixpkgs/ad0d20345219790533ebe06571f82ed6b034db31
└───nixpkgs follows input 'nix/nixpkgs'

#! nix-shell -i bash -p nixUnstable
nix --experimental-features 'nix-command flakes' shell github:edolstra/dwarffs/f691e2c991e75edb22836f1dbe632c40324215c5 --command dwarffs --version

fusermount version: 2.9.9

4.2 KiB Raw Blame History

Nix flakes

4.2 KiB

Raw Blame History