Archwright

⚠️ Heads up: this is vibe coded and probably trash. It's opinionated, not intended for production use — only for personal use and messing around. There are almost certainly much better tools out there to handle this. Use at your own risk.

A declarative way to rebuild an Arch Linux machine from bare disks to a themed KDE desktop. One config file (config.yaml) drives a single static Go binary (archwright).

Phase A renders your config.yaml into an archinstall configuration and lets the official installer do the partitioning, LVM, pacstrap and bootloader install. Phase B then does the post-install customization (packages, flatpaks, 1Password, Plymouth, GRUB/KDE theming, dotfiles) directly.

It does not try to be NixOS — there's no purity, no rollback, no DSL. It's plain YAML you can read top to bottom plus a binary that orchestrates archinstall and the usual Arch tools (yay, flatpak, …), designed for the "I had to reinstall again" workflow. No bash/yq/jq runtime dependencies — just the binary.

archinstall version coupling. archinstall's JSON config is not a stable API; its schema changes between releases. We render against the version in internal/archinstall (Version), and preflight warns if the live ISO ships a different one. Validate the generated config against a real archinstall run in a VM (see Testing in a VM) before trusting it on hardware.

Build / install

go build -o archwright .          # local build
go install ./...                  # into $GOBIN

# stamped build (what releases do):
go build -ldflags "-s -w -X main.version=$(git describe --tags --always)" -o archwright .

Or grab a prebuilt binary from a GitHub release (see Releases).

Commands

archwright install   [--dry-run] [--only <stage>] [--config <file>] [--yes]
archwright bootstrap [--dry-run] [--only <stage>] [--config <file>]
archwright validate  [--config <file>]
archwright --version

Command	Phase	Run as	What it does
install	A	root, from the Arch live ISO	(optional) pick mirrors with reflector; probe disk geometry; render an archinstall config (disk 1 = ESP+swap+LVM-PV partitions; extra disks = full-disk PVs; one VG→XFS root LV) + credentials; run archinstall --silent; then in the target chroot configure custom repos (e.g. CachyOS) + install custom kernels (replace stock, set GRUB default) and stage the binary+config for Phase B
bootstrap	B	your user, after reboot	yay, packages, flatpaks, AUR, Plymouth, GRUB theme, KDE customization, chezmoi init --apply
validate	—	anyone	parse + validate config.yaml, change nothing

Flags

Flag	Effect
--dry-run	print every command instead of running it (records a full plan; runs nothing)
--only <stage>	run one stage by name or number (--only 10, --only grub)
--config <file>	config path (default config.yaml)
--yes	(install only) skip the destructive ERASE confirm + set a throwaway password — VMs only

Workflow

# Configure:
cp config.example.yaml config.yaml
$EDITOR config.yaml                    # set disks, hostname, user, package lists, themes

# Phase A — from the Arch live ISO (UEFI), online, as root:
./archwright validate                 # sanity-check config first
./archwright install --dry-run        # review the exact plan
./archwright install                  # type ERASE when prompted
reboot

# Phase B — after reboot, as your user (binary was staged in ~/):
./archwright bootstrap --dry-run
./archwright bootstrap

config.yaml is gitignored. Double-check disks: — Phase A erases those devices. Always run --dry-run first: every destructive command is printed (and recorded as a plan) without executing.

Validation

Config rules are declared as validate: struct tags in internal/config/config.go (go-playground/validator) — the struct is the schema. validate reports every problem at once with YAML-path messages:

$ archwright validate --config bad.yaml
disks.esp.device must start with "/dev/"
disks.lvm.filesystem must be one of: xfs ext4
disks.lvm.pvs must have at least 1 item(s)

Architecture

main.go                       cobra CLI: install / bootstrap / validate
internal/config/              Config struct + tag-based Validate()
internal/archinstall/         render config.yaml -> archinstall config + creds JSON
internal/run/                 Runner: Cmd/Shell/Chroot/Root, dry-run, recorded .Plan
internal/ui/                  charmbracelet log + lipgloss styling + huh prompts
internal/stages/              one file per stage; self-registering ordered registry

Stages implement a small interface (Order/Name/Phase/Run) and register themselves in init(). The runner records every command into .Plan, which is what the tests assert on. Phase A is just two stages: preflight (UEFI + config + archinstall checks) and archinstall (reflector → probe geometry → internal/archinstall.Build → write JSON → run archinstall → post-install in the target chroot: custom repos + kernels → stage the binary for Phase B). The internal/archinstall package is independently unit-tested: it builds the disk/LVM JSON from a config + fake geometry and asserts the layout, the obj_id wiring between PVs and the volume group, and size math — no disks required.

Custom repos and kernels are Phase A, not Phase B. They run in the post-archinstall chroot so the very first boot already uses them (e.g. boots linux-cachyos, with stock linux removed before it ever boots). The repo config is written into the target's pacman.conf + keyring, so it persists and Phase B package installs resolve against it too. archinstall must always pacstrap stock linux for a bootable baseline; kernel.replace_stock removes it in the chroot before reboot.

Relationship to dotfiles

This repo owns the system: disks, base OS, packages, boot splash, GRUB/KDE theming. User-level dotfiles (zsh, terminal, etc.) stay in AdamJHall/dotfiles and are pulled in by the final chezmoi step.

Testing

go test ./...            # unit tests: validation table + per-stage command plans
go vet ./...

Tests run each stage in --dry-run and assert on the recorded command plan, so they verify behavior without touching disks. What they cannot cover — real partitioning/pacstrap/boot — is covered by the VM flow below.

Testing in a VM (recommended before real hardware)

Phase A repartitions disks, so smoke-test the whole flow in QEMU with three virtual disks:

# Three disks: 100G (disk 1: ESP+swap+PV) + 2× 50G (whole-disk PVs)
qemu-img create -f qcow2 disk1.qcow2 100G
qemu-img create -f qcow2 disk2.qcow2 50G
qemu-img create -f qcow2 disk3.qcow2 50G

qemu-system-x86_64 \
  -enable-kvm -m 8G -smp 4 \
  -bios /usr/share/edk2/x64/OVMF.4m.fd \          # UEFI firmware (edk2-ovmf)
  -drive file=disk1.qcow2,if=virtio \
  -drive file=disk2.qcow2,if=virtio \
  -drive file=disk3.qcow2,if=virtio \
  -cdrom archlinux-x86_64.iso \
  -boot d

Inside the VM the disks appear as /dev/vda, /dev/vdb, /dev/vdc — set config.yaml accordingly (esp.device: /dev/vda, PVs /dev/vda3, /dev/vdb, /dev/vdc). Use ./archwright install --yes to skip the interactive prompts during automated runs.

This VM run is also where you validate the generated archinstall JSON against the version on the ISO. install --dry-run prints the rendered config without running anything; a real install writes /tmp/archinstall-config.json + /tmp/archinstall-creds.json and invokes archinstall --silent. If archinstall rejects the config after a version bump, diff its schema and update internal/archinstall + the pinned Version.

Releases

goreleaser builds cross-compiled static binaries:

goreleaser release --snapshot --clean        # local test, no publish
git tag v0.1.0 && git push origin v0.1.0
goreleaser release --clean                   # publish to GitHub
goreleaser check                             # validate .goreleaser.yaml

Config: .goreleaser.yaml (linux amd64/arm64, version stamped from the tag, config.example.yaml bundled in the archive).