Changed . token to _dot

This change allows the dotfiles to work with chezmoi (e.g: on windows)
and improves grepability with neovim/telescope

dot_config/nushell/nu_scripts/modules/nix/README.md

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+# Nix
+
+Commands for working with [nix/nixos](https://nixos.org/).
+
+### ns
+Shorthand search (`nix search nixpkgs ...`) with much nicer output.
+```shell
+❯ > nix search nixpkgs diesel
+* legacyPackages.x86_64-linux.diesel-cli (2.1.0)
+  Database tool for working with Rust projects that use Diesel
+
+* legacyPackages.x86_64-linux.diesel-cli-ext (0.3.13)
+  Provides different tools for projects using the diesel_cli
+```
+```shell
+❯ > ns diesel
+╭───┬────────────────┬──────────────────────────────────────────────────────────────┬─────────╮
+│ # │    package     │                         description                          │ version │
+├───┼────────────────┼──────────────────────────────────────────────────────────────┼─────────┤
+│ 0 │ diesel-cli     │ Database tool for working with Rust projects that use Diesel │ 2.1.0   │
+│ 1 │ diesel-cli-ext │ Provides different tools for projects using the diesel_cli   │ 0.3.13  │
+├───┼────────────────┼──────────────────────────────────────────────────────────────┼─────────┤
+│ # │    package     │                         description                          │ version │
+╰───┴────────────────┴──────────────────────────────────────────────────────────────┴─────────╯
+```
+
+### activation-script
+
+Shows changed packages after running `nixos-rebuild switch/boot` and change in total size of installed packages. Changes that don't affect the installed size are filtered out. Intended to be added to `configuration.nix` of `NixOS`.
+
+```
+╭────┬──────────────────┬───────────────────────┬────────┬────────────╮
+│  # │     Package      │          Old          │  New   │    Diff    │
+├────┼──────────────────┼───────────────────────┼────────┼────────────┤
+│  0 │ nushell          │ 0.94.1                │ 0.95.0 │  192.1 KiB │
+│  1 │ hyprland         │ 0.41.1                │ 0.41.2 │   52.9 KiB │
+│  2 │ qtdeclarative    │ 6.7.1                 │ 6.7.2  │   36.2 KiB │
+│  3 │ linux            │ 6.9.6                 │ 6.9.7  │   17.7 KiB │
+│  4 │ qtbase           │ 6.7.1                 │ 6.7.2  │   16.1 KiB │
+│  5 │ networkmanager   │ 1.48.0                │ 1.48.2 │    8.3 KiB │
+│  6 │ wireplumber      │ 0.5.3                 │ 0.5.4  │  -21.4 KiB │
+│  7 │ libbacktrace     │ 0-unstable-2024-03-02 │ ∅      │ -110.4 KiB │
+│  8 │ woff2            │ 1.0.2                 │ ∅      │ -155.5 KiB │
+│  9 │ libmanette       │ 0.2.7                 │ ∅      │ -226.0 KiB │
+│ 10 │ webkitgtk        │ 2.44.2+abi=6.0        │ ∅      │ -147.6 MiB │
+│ 11 │ telegram-desktop │ 5.1.8                 │ ∅      │ -219.4 MiB │
+│ 12 │                  │                       │        │            │
+│ 13 │                  │                       │ Total: │ -367.2 MiB │
+╰────┴──────────────────┴───────────────────────┴────────┴────────────╯
+```
+
+### nufetch
+
+nu alternative to `neofetch`/`hyfetch`.
+```
+╭──────────┬───────────────────────────────────╮
+│ kernel   │ 6.11.0                            │
+│ nu       │ 0.98.0                            │
+│          │ ╭─────────────┬────────┬────────╮ │
+│ packages │ │ environment │ number │  size  │ │
+│          │ ├─────────────┼────────┼────────┤ │
+│          │ │ system      │    825 │ 5.7 GB │ │
+│          │ │ sperber     │    352 │ 1.5 GB │ │
+│          │ │ steam       │    929 │ 5.4 GB │ │
+│          │ ╰─────────────┴────────┴────────╯ │
+│ uptime   │ 3hr 1min 18sec                    │
+╰──────────┴───────────────────────────────────╯
+```

dot_config/nushell/nu_scripts/modules/nix/activation-script

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+### add to configuration.nix
+
+nix.settings.experimental-features = ["nix-command"];
+
+system.activationScripts.diff = ''
+  if [[ -e /run/current-system ]]; then
+    ${pkgs.nushell}/bin/nu -c "let diff_closure = (${pkgs.nix}/bin/nix store diff-closures /run/current-system '$systemConfig'); let table = (\$diff_closure | lines | where \$it =~ KiB | where \$it =~ → | parse -r '^(?<Package>\S+): (?<Old>[^,]+)(?:.*) → (?<New>[^,]+)(?:.*), (?<DiffBin>.*)$' | insert Diff { get DiffBin | ansi strip | into filesize } | sort-by -r Diff | reject DiffBin); if (\$table | get Diff | is-not-empty) { print \"\"; \$table | append [[Package Old New Diff]; [\"\" \"\" \"\" \"\"]] | append [[Package Old New Diff]; [\"\" \"\" \"Total:\" (\$table | get Diff | math sum) ]] | print; print \"\" }"
+  fi
+'';
+

dot_config/nushell/nu_scripts/modules/nix/nix.nu

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+# Search nixpkgs and provide table output
+export def ns [
+    term: string # Search target.
+] {
+
+    let info = (
+        sysctl -n kernel.arch kernel.ostype
+        | lines
+        | {arch: ($in.0|str downcase), ostype: ($in.1|str downcase)}
+    )
+
+    nix search --json nixpkgs $term
+        | from json
+        | transpose package description
+        | flatten
+        | select package description version
+        | update package {|row| $row.package | str replace $"legacyPackages.($info.arch)-($info.ostype)." ""}
+}

dot_config/nushell/nu_scripts/modules/nix/nufetch.nu

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+export def main [] { 
+{
+"kernel": $nu.os-info.kernel_version, 
+"nu": $env.NU_VERSION, 
+"packages": (ls /etc/profiles/per-user | select name | prepend [[name];["/run/current-system/sw"]] | each { insert "number" (nix path-info --recursive ($in | get name) | lines | length) | insert "size" ( nix path-info -S ($in | get name) | parse -r '\s(.*)' | get capture0.0 | into filesize) | update "name" ($in | get name | parse -r '.*/(.*)' | get capture0.0 | if $in == "sw" {"system"} else {$in}) | rename "environment"}), 
+"uptime": (sys host).uptime 
+}
+}