Merge pull request 'tree: remove bud and all mentions of it' (#105) from feature/remove-bud into main

Reviewed-on: https://git.b12f.io/pub-solar/os/pulls/105 Reviewed-by: hensoko <hensoko@noreply.example.org>
2022-08-14 15:17:40 +00:00 · 2022-08-14 15:17:40 +00:00 · 55d5f6938a
parent cb5c75b1cc b42f7b72ad
commit 55d5f6938a
19 changed files with 681 additions and 364 deletions
--- a/.drone.yml
+++ b/.drone.yml
@ -106,7 +106,6 @@ steps:
      - nix $$NIX_FLAGS flake check
      - nix $$NIX_FLAGS build ".#nixosConfigurations.PubSolarOS.config.system.build.toplevel"
      - nix $$NIX_FLAGS develop --command echo OK
-      - nix $$NIX_FLAGS develop --command bud --help

 ---
 kind: pipeline
@ -122,8 +121,8 @@ steps:
    commands:
      - |
        nix --print-build-logs --verbose \
-          develop --command \
-            bud build bootstrap bootstrapIso
+          build \
+            '.#nixosConfigurations.bootstrap.config.system.build.bootstrapIso'
      - cp $(readlink -f result)/iso/*.iso /var/nix/iso-cache/

  - name: "Publish ISO"
@ -158,6 +157,6 @@ volumes:

 ---
 kind: signature
-hmac: bdbefb07b97dc8efc44d8eb36ee4d1bb89eec3b7255b49929e126e86a4b4a788
+hmac: da951ba8ede88996728acfb47846e01880eb0e3b91f66e47848d6c1cc727c5d9

 ...
--- a/doc/CONTRIBUTING.md
+++ b/doc/CONTRIBUTING.md
@ -1,18 +1,13 @@
-# Pull Requests
-
-## TL;DR;
+# TL;DR;
 - **Target Branch**: `main`
- **Merge Policy**: [`bors`][bors] is always right (&rarr; `bors try`)
+- **Merge Policy**: green check: merge away. yellow circle: have patience. red x: try again.
 - **Docs**: every change set is expected to contain doc updates
 - **Commit Msg**: be a poet! Comprehensive and explanatory commit messages 
  should cover the motivation and use case in an easily understandable manner
  even when read after a few months.
- **Test Driven Development**: please default to test driven development where possible.
+- **Test Driven Development**: please default to test driven development you can
+  make use of the `./examples` & `./e2e` and wire test up in the devshell. 

 ### Within the Devshell (`nix develop`)
 - **Hooks**: please `git commit` within the devshell
- **Fail Early**: please run from within the devshell on your local machine:
-  - `nix flake check`
-
-[bors]: https://bors.tech
-
+- **Fail Early**: please run `check-all` from within the devshell on your local machine
--- a/doc/SUMMARY.md
+++ b/doc/SUMMARY.md
@ -3,8 +3,6 @@
 - [Introduction](../README.md)
 - [Quick Start](./start/index.md)
  - [ISO](./start/iso.md)
-  - [Bootstrapping](./start/bootstrapping.md)
-  - [From NixOS](./start/from-nixos.md)
 - [Key Concepts](./concepts/index.md)
  - [Hosts](./concepts/hosts.md)
  - [Overrides](./concepts/overrides.md)
@ -18,11 +16,16 @@
 - [Concerns]()
  - [Secrets](./secrets.md)
  - [Tests](./tests.md)
- [Helper Script – `bud`](./bud/index.md)
-  - [get](./bud/get.md)
 - [Integrations](./integrations/index.md)
  - [Cachix](./integrations/cachix.md)
  - [Deploy RS](./integrations/deploy.md)
  - [NvFetcher](./integrations/nvfetcher.md)
  - [Hercules CI](./integrations/hercules.md)
+- [API Reference](./api-reference.md)
+  - [Channels](./api-reference-channels.md)
+  - [Home](./api-reference-home.md)
+  - [Devshell](./api-reference-devshell.md)
+  - [NixOS](./api-reference-nixos.md)
+- [Library Reference]()
 - [Contributing](./CONTRIBUTING.md)
+
--- a/doc/api-reference-channels.md
+++ b/doc/api-reference-channels.md
@ -0,0 +1,91 @@
+# Channels API Container
+Configure your channels that you can use throughout your configurations.
+
+> #### ⚠ Gotcha ⚠
+> Devshell & (non-host-specific) Home-Manager `pkgs` instances are rendered off the
+> `nixos.hostDefaults.channelName` (default) channel.
+
+
+## channels
+nixpkgs channels to create
+
+
+*_Type_*:
+attribute set of submodules or path convertible to it
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## channels.\<name\>.config
+nixpkgs config for this channel
+
+
+*_Type_*:
+attribute set or path convertible to it
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## channels.\<name\>.input
+nixpkgs flake input to use for this channel
+
+
+*_Type_*:
+nix flake
+
+
+*_Default_*
+```
+"self.inputs.<name>"
+```
+
+
+
+
+## channels.\<name\>.overlays
+overlays to apply to this channel
+these will get exported under the 'overlays' flake output
+as \<channel\>/\<name\> and any overlay pulled from \<inputs\>
+will be filtered out
+
+
+*_Type_*:
+list of valid Nixpkgs overlay or path convertible to its or anything convertible to it or path convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## channels.\<name\>.patches
+patches to apply to this channel
+
+
+*_Type_*:
+list of paths
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
--- a/doc/api-reference-devshell.md
+++ b/doc/api-reference-devshell.md
@ -0,0 +1,72 @@
+# Devshell API Container
+Configure your devshell module collections of your environment.
+
+
+## devshell
+Modules to include in your DevOS shell. the `modules` argument
+will be exported under the `devshellModules` output
+
+
+*_Type_*:
+submodule or path convertible to it
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## devshell.exportedModules
+modules to include in all hosts and export to devshellModules output
+
+
+*_Type_*:
+list of valid module or path convertible to its or anything convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## devshell.externalModules
+The `externalModules` option has been removed.
+Any modules that should be exported should be defined with the `exportedModules`
+option and all other modules should just go into the `modules` option.
+
+
+*_Type_*:
+list of valid modules or anything convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## devshell.modules
+modules to include that won't be exported
+meant importing modules from external flakes
+
+
+*_Type_*:
+list of valid modules or anything convertible to it or path convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
--- a/doc/api-reference-home.md
+++ b/doc/api-reference-home.md
@ -0,0 +1,119 @@
+# Home-Manager API Container
+Configure your home manager modules, profiles & suites.
+
+
+## home
+hosts, modules, suites, and profiles for home-manager
+
+
+*_Type_*:
+submodule or path convertible to it
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## home.exportedModules
+modules to include in all hosts and export to homeModules output
+
+
+*_Type_*:
+list of valid modules or anything convertible to it or path convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## home.externalModules
+The `externalModules` option has been removed.
+Any modules that should be exported should be defined with the `exportedModules`
+option and all other modules should just go into the `modules` option.
+
+
+*_Type_*:
+list of valid modules or anything convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## home.importables
+Packages of paths to be passed to modules as `specialArgs`.
+
+
+*_Type_*:
+attribute set
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## home.importables.suites
+collections of profiles
+
+
+*_Type_*:
+null or attribute set of list of paths or anything convertible to its or path convertible to it
+
+
+*_Default_*
+```
+null
+```
+
+
+
+
+## home.modules
+modules to include that won't be exported
+meant importing modules from external flakes
+
+
+*_Type_*:
+list of valid modules or anything convertible to it or path convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## home.users
+HM users that can be deployed portably without a host.
+
+
+*_Type_*:
+attribute set of HM user configs
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
--- a/doc/api-reference-nixos.md
+++ b/doc/api-reference-nixos.md
@ -0,0 +1,234 @@
+# NixOS API Container
+Configure your nixos modules, profiles & suites.
+
+
+## nixos
+hosts, modules, suites, and profiles for NixOS
+
+
+*_Type_*:
+submodule or path convertible to it
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## nixos.hostDefaults
+Defaults for all hosts.
+the modules passed under hostDefaults will be exported
+to the 'nixosModules' flake output.
+They will also be added to all hosts.
+
+
+*_Type_*:
+submodule
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## nixos.hostDefaults.channelName
+Channel this host should follow
+
+
+*_Type_*:
+channel defined in `channels`
+
+
+
+
+
+
+## nixos.hostDefaults.exportedModules
+modules to include in all hosts and export to nixosModules output
+
+
+*_Type_*:
+list of valid modules or anything convertible to it or path convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## nixos.hostDefaults.externalModules
+The `externalModules` option has been removed.
+Any modules that should be exported should be defined with the `exportedModules`
+option and all other modules should just go into the `modules` option.
+
+
+*_Type_*:
+list of valid modules or anything convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## nixos.hostDefaults.modules
+modules to include that won't be exported
+meant importing modules from external flakes
+
+
+*_Type_*:
+list of valid modules or anything convertible to it or path convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## nixos.hostDefaults.system
+system for this host
+
+
+*_Type_*:
+null or system defined in `supportedSystems`
+
+
+*_Default_*
+```
+null
+```
+
+
+
+
+## nixos.hosts
+configurations to include in the nixosConfigurations output
+
+
+*_Type_*:
+attribute set of submodules
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## nixos.hosts.\<name\>.channelName
+Channel this host should follow
+
+
+*_Type_*:
+null or channel defined in `channels`
+
+
+*_Default_*
+```
+null
+```
+
+
+
+
+## nixos.hosts.\<name\>.modules
+modules to include
+
+
+*_Type_*:
+list of valid modules or anything convertible to it or path convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+
+
+## nixos.hosts.\<name\>.system
+system for this host
+
+
+*_Type_*:
+null or system defined in `supportedSystems`
+
+
+*_Default_*
+```
+null
+```
+
+
+
+
+## nixos.hosts.\<name\>.tests
+tests to run
+
+
+*_Type_*:
+list of valid NixOS test or path convertible to its or anything convertible to it
+
+
+*_Default_*
+```
+[]
+```
+
+
+*_Example_*
+```
+{"_type":"literalExpression","text":"[\n  {\n    name = \"testname1\";\n    machine = { ... };\n    testScript = ''\n      # ...\n    '';\n  }\n  ({ corutils, writers, ... }: {\n    name = \"testname2\";\n    machine = { ... };\n    testScript = ''\n      # ...\n    '';\n  })\n  ./path/to/test.nix\n];\n"}
+```
+
+
+## nixos.importables
+Packages of paths to be passed to modules as `specialArgs`.
+
+
+*_Type_*:
+attribute set
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## nixos.importables.suites
+collections of profiles
+
+
+*_Type_*:
+null or attribute set of list of paths or anything convertible to its or path convertible to it
+
+
+*_Default_*
+```
+null
+```
+
+
+
+
--- a/doc/api-reference.md
+++ b/doc/api-reference.md
@ -0,0 +1,80 @@
+# Top Level API
+`digga`'s top level API. API Containers are documented in their respective sub-chapter:
+
+- [Channels](./api-reference-channels.md)
+- [Home](./api-reference-home.md)
+- [Devshell](./api-reference-devshell.md)
+- [NixOS](./api-reference-nixos.md)
+- [Darwin](./api-reference-darwin.md)
+
+## channelsConfig
+nixpkgs config for all channels
+
+
+*_Type_*:
+attribute set or path convertible to it
+
+
+*_Default_*
+```
+{}
+```
+
+
+
+
+## inputs
+The flake's inputs
+
+*_Type_*:
+attribute set of nix flakes
+
+
+
+
+
+
+## outputsBuilder
+builder for flake system-spaced outputs
+The builder gets passed an attrset of all channels
+
+
+*_Type_*:
+function that evaluates to a(n) attribute set or path convertible to it
+
+
+*_Default_*
+```
+"channels: { }"
+```
+
+
+
+
+## self
+The flake to create the DevOS outputs for
+
+*_Type_*:
+nix flake
+
+
+
+
+
+
+## supportedSystems
+The systems supported by this flake
+
+
+*_Type_*:
+list of strings
+
+
+*_Default_*
+```
+["aarch64-linux","aarch64-darwin","i686-linux","x86_64-darwin","x86_64-linux"]
+```
+
+
+
+
--- a/doc/bud/get.md
+++ b/doc/bud/get.md
@ -1,10 +0,0 @@
-# get
-The `get` subcommand is useful for getting a bare copy of devos without the
-git history.
-
-## Usage
-```sh
-bud get DEST-DIR
-```
-
-If DEST-DIR is ommitted, it defaults to _./devos_.
--- a/doc/bud/index.md
+++ b/doc/bud/index.md
@ -1,24 +0,0 @@
-# [`bud`][bud] command
-The template incudes a convenient script for managing your system called [`bud`][bud].
-
-It is a portable and highly composable system control tool that work anywhere on your host
-or in the flake's devshell. 
-
-Although it comes with some predefined standard helpers,
-it is very extensible and you are encouraged to write your own script snippets
-to ease your workflows. An example is the bud module for a `get` command that
-comes included with `devos`.
-
-While writing scripts you can convenientely access smart environment variables
-that can tell the current architecture, user or host name, among others, regardless
-wether you invoke `bud` within the devshell or as the system-wide installed `bud`.
-
-For details, please review the [bud repo][bud].
-
-## Usage
-```sh
-bud help
-```
-
-
-[bud]: https://github.com/divnix/bud
--- a/doc/concepts/users.md
+++ b/doc/concepts/users.md
@ -49,19 +49,18 @@ argument that gets passed to your home-manager users.

 ## External Usage
 You can easily use the defined home-manager configurations outside of NixOS
-using the `homeConfigurations` flake output. The [bud](../bud/index.md) helper
-script makes this even easier.
+using the `homeConfigurations` flake output.

-This is great for keeping your environment consistent across Unix systems,
-including OSX.
+This is great for keeping your environment consistent across Unix-like systems,
+including macOS.

 ### From within the projects devshell:
 ```sh
-# builds the nixos user defined in the NixOS host
-bud home NixOS nixos
+# builds the pub-solar user defined in the PubSolarOS host
+nix build '.#homeConfigurations."pub-solar@PubSolarOS".activationPackage'

 # build and activate
-bud home NixOS nixos switch
+nix build '.#homeConfigurations."pub-solar@PubSolarOS".activationPackage' && ./result/activate && unlink result
 ```

 ### Manually from outside the project:
--- a/doc/start/bootstrapping.md
+++ b/doc/start/bootstrapping.md
@ -1,102 +0,0 @@
-# Bootstrapping
-
-This will help you boostrap a bare host with the help of the
-[bespoke iso](./iso.md) live installer.
-
-_Note: nothing prevents you from remotely executing the boostrapping
-process. See below._
-
-Once your target host has booted into the live iso, you need to partition
-and format your disk according to the [official manual][manual].
-
-## Mount partitions
-
-Then properly mount the formatted partitions at `/mnt`, so that you can
-install your system to those new partitions.
-
-Mount `nixos` partition to `/mnt` and &mdash; for UEFI &mdash; `boot`
-partition to `/mnt/boot`:
-
-```console
-$ mount /dev/disk/by-label/nixos /mnt
-$ mkdir -p /mnt/boot && mount /dev/disk/by-label/boot /mnt/boot # UEFI only
-$ swapon /dev/disk/by-label/swap
-```
-
-Add some extra space to the store. In the iso, it's running on a tmpfs
-off your RAM:
-```console
-$ mkdir -p /mnt/tmpstore/{work,store}
-$ mount -t overlay overlay -olowerdir=/nix/store,upperdir=/mnt/tmpstore/store,workdir=/mnt/tmpstore/work /nix/store
-```
-
-## Install
-
-Install off of a copy of devos from the time the iso was built:
-
-```console
-$ cd /iso/devos
-$ nixos-install --flake .#NixOS
-```
-
-## Notes of interest
-
-### Remote access to the live installer
-
-The iso live installer comes preconfigured with a network configuration
-which announces it's hostname via [MulticastDNS][mDNS] as `hostname.local`,
-that is `bootstrap.local` in the [iso example](./iso).
-
-In the rare case that [MulticastDNS][mDNS] is not availabe or turned off
-in your network, there is a static link-local IPv6 address configured to
-`fe80::47`(mnemonic from the letter's position in the english alphabet:
-`n=14 i=9 x=24; 47 = n+i+x`).
-
-Provided that you have added your public key to the authorized keys of the
-`root` user _(hint: [`deploy-rs`](../integrations/deploy.md) needs passwordless
-sudo access)_:
-
-```nix
-{ ... }:
-{
-  users.users.root.openssh.authorizedKeys.keyFiles = [
-    ../secrets/path/to/key.pub
-  ];
-}
-```
-
-You can then ssh into the live installer through one of the
-following options:
-
-```console
-ssh root@bootstrap.local
-
-ssh root@fe80::47%eno1  # where eno1 is your network interface on which you are linked to the target
-```
-
-_Note: the [static link-local IPv6 address][staticLLA] and [MulticastDNS][mDNS] is only
-configured on the live installer. If you wish to enable [MulticastDNS][mDNS]
-for your environment, you ought to configure that in a regular [profile](../concepts/profiles.md)._
-
-### EUI-64 LLA & Host Identity
-
-The iso's IPv6 Link Local Address (LLA) is configured with a static 64-bit Extended
-Unique Identifiers (EUI-64) that is derived from the host interface's Message
-Authentication Code (MAC) address.
-
-After a little while (a few seconds), you can remotely discover this unique and host
-specific address over [NDP][NDP] for example with:
-
-```console
-ip -6 neigh show # also shows fe80::47
-```
-
-***This LLA is stable for the host, unless you need to swap that particular network card.***
-Under this reservation, though, you may use this EUI-64 to wire up a specific
-(cryptographic) host identity.
-
-
-[manual]: https://nixos.org/manual/nixos/stable/index.html#sec-installation-partitioning
-[mDNS]: https://en.wikipedia.org/wiki/Multicast_DNS
-[NDP]: https://en.wikipedia.org/wiki/Neighbor_Discovery_Protocol
-[staticLLA]: https://tools.ietf.org/html/rfc7404
--- a/doc/start/from-nixos.md
+++ b/doc/start/from-nixos.md
@ -1,51 +0,0 @@
-# From NixOS
-
-## Generate Configuration
-Assuming you're happy with your existing partition layout, you can generate a
-basic NixOS configuration for your system using:
-```sh
-bud up
-```
-
-This will make a new file `hosts/up-$(hostname).nix`, which you can edit to
-your liking.
-
-You must then add a host to `nixos.hosts` in flake.nix:
-```nix
-{
-  nixos.hosts = {
-    modules = hosts/NixOS.nix;
-  };
-}
-```
-
-Make sure your `i18n.defaultLocale` and `time.timeZone` are set properly for
-your region. Keep in mind that `networking.hostName` will be automatically
-set to the name of your host;
-
-Now might be a good time to read the docs on [suites](../concepts/suites.md) and
-[profiles](../concepts/profiles.md) and add or create any that you need.
-
-> ##### _Note:_
-> While the `up` sub-command is provided as a convenience to quickly set up and
-> install a "fresh" NixOS system on current hardware, committing these files is
-> discouraged.
->
-> They are placed in the git staging area automatically because they would be
-> invisible to the flake otherwise, but it is best to move what you need from
-> them directly into a host module of your own making, and commit that instead.
-# Installation
-
-Once you're ready to deploy `hosts/my-host.nix`:
-```sh
-bud my-host switch
-```
-
-
-This calls `nixos-rebuild` with sudo to build and install your configuration.
-
-> ##### _Notes:_
-> - Instead of `switch`, you can pass `build`, `test`, `boot`, etc just as with
->   `nixos-rebuild`.
-
-
--- a/doc/start/index.md
+++ b/doc/start/index.md
@ -2,25 +2,35 @@
 The only dependency is nix, so make sure you have it [installed][install-nix].

 ## Get the Template
-Here is a snippet that will get you the template without the git history:
+If you currently don't have flakes setup, you can utilize the digga shell to pull the template:
 ```sh
-nix-shell -p cachix --run "cachix use nrdxp"
-
-nix-shell https://github.com/divnix/devos/archive/main.tar.gz -A shell \
-  --run "bud get main"
-
-cd devos
-
-nix-shell
+nix-shell "https://github.com/divnix/digga/archive/main.tar.gz" \
+  --run "nix flake init -t github:divnix/digga"
+```
+If you already have flakes support, you can directly pull the template:
+```sh
+nix flake init -t github:divnix/digga
+```

+Then make sure to create the git repository:
+```sh
 git init
 git add .
 git commit -m init
 ```

-This will place you in a new folder named `devos` with git initialized, and a
-nix-shell that provides all the dependencies, including the unstable nix
-version required.
+To drop into a nix-shell, if you don't have flakes setup, use the digga shell to create a `flake.lock`:
+```sh
+nix-shell "https://github.com/divnix/digga/archive/main.tar.gz" \
+  --run "nix flake lock"
+```
+Or if you do have flakes support, just run:
+```sh
+nix flake lock
+```
+
+Finally, run `nix-shell` to get to an interactive shell with all the dependencies, including the unstable nix
+version required. You can run `menu` to confirm that you are using digga (expected output includes [docs], [general commands], [linter], etc.).

 In addition, the [binary cache](../integrations/cachix.md) is added for faster deployment.

@ -33,9 +43,8 @@ In addition, the [binary cache](../integrations/cachix.md) is added for faster d
 >   you can try with sudo: `sudo nix-shell -p cachix --run "cachix use nrdxp"`

 ## Next Steps:
+
 - [Make installable ISO](./iso.md)
- [Bootstrap Host](./bootstrapping.md)
- [Already on NixOS](./from-nixos.md)


 [install-nix]: https://nixos.org/manual/nix/stable/#sect-multi-user-installation
--- a/doc/start/iso.md
+++ b/doc/start/iso.md
@ -1,22 +1,36 @@
-# ISO
+# Installation Media
+
+This project leverages [nix-community/nixos-generators][nixos-generators] for
+building machine images. In most cases, you'll probably want to use the
+`install-iso` format.
+
+Making an installable ISO for `hosts/bootstrap.nix` is as simple as:

-Making and writing an installable iso for `hosts/bootstrap.nix` is as simple as:
 ```sh
-bud build bootstrap bootstrapIso
-sudo -E $(which bud) burn
+nix run github:nix-community/nixos-generators -- \
+  --format install-iso \
+  --flake '.#bootstrap'
 ```

-This works for any host.
+Then "burn" the ISO to your USB stick (or CD-R if you like!) following the
+[instructions in the NixOS manual][burn] (or using your preferred USB burner).

-## ISO image nix store & cache
+You can also swap out the `--format` for [any of the others][formats] supported
+by nixos-generators.

-The iso image holds the store to the live environment and _also_ acts as a binary cache
-to the installer. To considerably speed up things, the image already includes all flake
-`inputs` as well as the `devshell` closures.
+Continue by following the usual installation instructions in the NixOS manual.

-While you _could_ provision any machine with a single stick, a custom-made iso for
-the host you want to install DevOS to, maximises those local cache hits.
+## ISO Nix Store and Cache

-For hosts that don't differ too much, a single usb stick might be ok, whereas when
-there are bigger differences, a custom-made usb stick will be considerably faster.
+The ISO image holds the Nix store for the live environment and _also_ acts as a
+binary cache to the installer. To considerably speed things up, the image
+already includes all flake `inputs` as well as the `devshell` closures.

+While you _could_ provision any NixOS machine with the same USB stick, an ISO
+custom-made for your target host will maximise those local cache hits. For hosts
+that don't differ too much, a single USB stick might be ok, whereas when there
+are bigger differences, a custom-made USB stick will be considerably faster.
+
+[nixos-generators]: https://github.com/nix-community/nixos-generators 
+[burn]: https://nixos.org/manual/nixos/stable/index.html#sec-booting-from-usb
+[formats]: https://github.com/nix-community/nixos-generators/tree/master/formats
--- a/flake.lock
+++ b/flake.lock
@ -20,26 +20,6 @@
        "type": "github"
      }
    },
-    "beautysh": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "poetry2nix": "poetry2nix"
-      },
-      "locked": {
-        "lastModified": 1641830469,
-        "narHash": "sha256-uhDmgNP/biOWe4FtOa6c2xZnREH+NP9rdrMm0LccRUk=",
-        "owner": "lovesegfault",
-        "repo": "beautysh",
-        "rev": "e85d9736927c0fcf2abb05cb3a2d8d9b4502a2eb",
-        "type": "github"
-      },
-      "original": {
-        "owner": "lovesegfault",
-        "repo": "beautysh",
-        "type": "github"
-      }
-    },
    "blank": {
      "locked": {
        "lastModified": 1625557891,
@ -55,31 +35,6 @@
        "type": "github"
      }
    },
-    "bud": {
-      "inputs": {
-        "beautysh": "beautysh",
-        "devshell": [
-          "digga",
-          "devshell"
-        ],
-        "nixpkgs": [
-          "nixos"
-        ]
-      },
-      "locked": {
-        "lastModified": 1654190822,
-        "narHash": "sha256-B8z3stYaULNDBBjzJHrFHGgiJHrLqhBkxH+9u5iBP7E=",
-        "owner": "divnix",
-        "repo": "bud",
-        "rev": "0ff3e4e4b8791ea4d827bf5bfcac28cef060f209",
-        "type": "github"
-      },
-      "original": {
-        "owner": "divnix",
-        "repo": "bud",
-        "type": "github"
-      }
-    },
    "darwin": {
      "inputs": {
        "nixpkgs": [
@ -145,7 +100,7 @@
    },
    "devshell": {
      "inputs": {
-        "flake-utils": "flake-utils_2",
+        "flake-utils": "flake-utils",
        "nixpkgs": [
          "digga",
          "nixpkgs"
@ -251,11 +206,11 @@
    },
    "flake-utils": {
      "locked": {
-        "lastModified": 1631561581,
-        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "lastModified": 1642700792,
+        "narHash": "sha256-XqHrk7hFb+zBvRg6Ghl+AZDq03ov6OshJLiSWOoX5es=",
        "owner": "numtide",
        "repo": "flake-utils",
-        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "rev": "846b2ae0fc4cc943637d3d1def4454213e203cba",
        "type": "github"
      },
      "original": {
@ -266,7 +221,7 @@
    },
    "flake-utils-plus": {
      "inputs": {
-        "flake-utils": "flake-utils_3"
+        "flake-utils": "flake-utils_2"
      },
      "locked": {
        "lastModified": 1654029967,
@ -284,21 +239,6 @@
      }
    },
    "flake-utils_2": {
-      "locked": {
-        "lastModified": 1642700792,
-        "narHash": "sha256-XqHrk7hFb+zBvRg6Ghl+AZDq03ov6OshJLiSWOoX5es=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "846b2ae0fc4cc943637d3d1def4454213e203cba",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_3": {
      "locked": {
        "lastModified": 1644229661,
        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
@ -313,7 +253,7 @@
        "type": "github"
      }
    },
-    "flake-utils_4": {
+    "flake-utils_3": {
      "locked": {
        "lastModified": 1649676176,
        "narHash": "sha256-OWKJratjt2RW151VUlJPRALb7OU2S5s+f0vLj4o1bHM=",
@ -435,7 +375,7 @@
    "nixos-generators": {
      "inputs": {
        "nixlib": "nixlib",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs"
      },
      "locked": {
        "lastModified": 1657748715,
@ -468,16 +408,16 @@
    },
    "nixpkgs": {
      "locked": {
-        "lastModified": 1633971123,
-        "narHash": "sha256-WmI4NbH1IPGFWVkuBkKoYgOnxgwSfWDgdZplJlQ93vA=",
+        "lastModified": 1637186689,
+        "narHash": "sha256-NU7BhgnwA/3ibmCeSzFK6xGi+Bari9mPfn+4cBmyEjw=",
        "owner": "NixOS",
        "repo": "nixpkgs",
-        "rev": "e4ef597edfd8a0ba5f12362932fc9b1dd01a0aef",
+        "rev": "7fad01d9d5a3f82081c00fb57918d64145dc904c",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
-        "ref": "nixos-unstable-small",
+        "ref": "nixpkgs-unstable",
        "repo": "nixpkgs",
        "type": "github"
      }
@ -498,22 +438,6 @@
        "type": "github"
      }
    },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1637186689,
-        "narHash": "sha256-NU7BhgnwA/3ibmCeSzFK6xGi+Bari9mPfn+4cBmyEjw=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "7fad01d9d5a3f82081c00fb57918d64145dc904c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
    "nur": {
      "locked": {
        "lastModified": 0,
@ -529,7 +453,7 @@
    "nvfetcher": {
      "inputs": {
        "flake-compat": "flake-compat_3",
-        "flake-utils": "flake-utils_4",
+        "flake-utils": "flake-utils_3",
        "nixpkgs": [
          "nixos"
        ]
@ -548,37 +472,9 @@
        "type": "github"
      }
    },
-    "poetry2nix": {
-      "inputs": {
-        "flake-utils": [
-          "bud",
-          "beautysh",
-          "flake-utils"
-        ],
-        "nixpkgs": [
-          "bud",
-          "beautysh",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1633382856,
-        "narHash": "sha256-hYlet806M9xJj4yxf0g5fhDT2IEUVIMAl7sqIeZ8DUM=",
-        "owner": "nix-community",
-        "repo": "poetry2nix",
-        "rev": "705cbfa10e3d9bfed2e59e0256844ae3704dbd7e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "poetry2nix",
-        "type": "github"
-      }
-    },
    "root": {
      "inputs": {
        "agenix": "agenix",
-        "bud": "bud",
        "darwin": "darwin",
        "deploy": "deploy",
        "digga": "digga",
--- a/flake.nix
+++ b/flake.nix
@ -17,10 +17,6 @@
      digga.inputs.home-manager.follows = "home";
      digga.inputs.deploy.follows = "deploy";

-      bud.url = "github:divnix/bud";
-      bud.inputs.nixpkgs.follows = "nixos";
-      bud.inputs.devshell.follows = "digga/devshell";
-
      home.url = "github:nix-community/home-manager/release-22.05";
      home.inputs.nixpkgs.follows = "nixos";

@ -47,7 +43,6 @@
  outputs =
    { self
    , digga
-    , bud
    , nixos
    , home
    , nixos-hardware
@ -101,7 +96,6 @@
              digga.nixosModules.nixConfig
              home.nixosModules.home-manager
              agenix.nixosModules.age
-              bud.nixosModules.bud
            ];
          };

--- a/hosts/bootstrap.nix
+++ b/hosts/bootstrap.nix
@ -1,6 +1,6 @@
 { profiles, ... }:
 {
-  # build with: `bud build bootstrap bootstrapIso`
+  # build with: `nix build '.#nixosConfigurations.bootstrap.config.system.build.bootstrapIso'`
  # reachable on the local link via ssh root@fe80::47%eno1
  # where 'eno1' is replaced by your own machine's network
  # interface that has the local link to the target machine
--- a/shell/default.nix
+++ b/shell/default.nix
@ -1,7 +1,6 @@
 { self, inputs, ... }:
 {
  modules = with inputs; [
-    bud.devshellModules.bud
  ];
  exportedModules = [
    ./devos.nix