archbox/README.md

# Archbox
Installs Arch Linux inside a chroot enviroment.
## Why?
Ever since I'm running some niche distros like Void, Solus, I had a problem finding softwares I need in their not-so-large repositories, also I don't like how flatpak and snap works. so i decided to create an Arch Linux chroot enviroment everytime I distrohop. Why Arch Linux? They have a really, really good repositories, oh and don't mention how big AUR is.
## Installation
### Dependencies
- Bash
- Sed
- Wget
- Tar
- Desktop-file-utils
- Zenity (Optional: for .desktop entry manager GUI)
### Installing Archbox
It's pretty easy, just run ```install.sh``` as root.
### Installing chroot enviroment
Before creating chroot enviroment, edit your chroot username in ```/etc/archbox.conf```, then do :
```
sudo archbox --create <archlinux tarball download link>
```
### Configuring filesystem automount
Execute ```/usr/local/share/archbox/bin/archboxinit start``` on boot.
If you use systemd, you can create a systemd service with this syntax below :
```
[Unit]
Description=Archbox init
PartOf=multi-user.target

[Service]
ExecStart=/usr/local/share/archbox/bin/archboxinit start
Type=oneshot
User=root

[Install]
WantedBy=multi-user.target
```
Thanks to [@SamsiFPV](https://github.com/SamsiFPV)

If you don't use systemd, either create your own init service, or create a @reboot cronjob.
### Removing chroot enviroment
**IMPORTANT**, Make sure you've unmounted everything in chroot enviroment, if you're unsure which partitions must be unmounted, remove the init script and reboot, then delete the folder.
### Entering chroot enviroment
To enter chroot, do :
```
archbox --enter
```
### Executing commands in chroot enviroment
To execute commands inside chroot envirotment, do :
```
archbox <command>
```
for example, to update chroot, do :
```
archbox sudo pacman -Syu
```
### Optional steps
You may want to add this if you don't want to run archbox chroot without password :
#### Sudo
```
%wheel  ALL=(root) NOPASSWD: /usr/local/share/archbox/bin/archbox,/usr/local/share/archbox/bin/copyresolv,/usr/local/share/archbox/bin/remount_run
```
#### Doas
```
permit nopass :wheel as root cmd /usr/local/share/archbox/bin/archbox
permit nopass :wheel as root cmd /usr/local/share/archbox/bin/copyresolv
permit nopass :wheel as root cmd /usr/local/share/archbox/bin/remount_run
```
### Misc
#### Systemd services
Use ```servicectl``` command to manage systemd services.
More info [here](https://github.com/smaknsk/servicectl) 

To enable service on host boot, in archbox do :
```
sudo servicectl enable <service name>
```
To start services immediately, in archbox do :
```
sudo servicectl start <service name>
```
This isn't actually using systemd to start services, rather it parses systemd .service files and executes it.
#### Desktop entries
Use ```archbox-desktop``` to install desktop entries in chroot to host (installed to ```~/.local/share/applications/archbox```)
#### Lauching apps via rofi
Instead of opening terminal or installing desktop entries everytime you want to run application inside chroot, you may want to launch rofi inside chroot, install rofi and do :
```
archbox rofi -show drun
```
#### Prompt
If you use bash with nerd font you could add a nice little Arch Linux icon in your prompt, add :
```
[[ -e /etc/arch-release ]] && export PS1=" $PS1"
```
to your ```~/.bashrc```
#### Adding enviroment variables
Edit ENV_VAR in ```/etc/archbox.conf```. For example, if you want to use qt5ct as Qt5 theme, edit it like this :
```
ENV_VAR="QT_QPA_PLATFORMTHEME=qt5ct"
```
An example with multiple enviroment variables.
```
ENV_VAR="QT_QPA_PLATFORMTHEME=qt5ct GTK_CSD=0 LD_PRELOAD=/var/home/lemniskett/git_repo/gtk3-nocsd/libgtk3-nocsd.so.0"
```
### Known issues
#### NixOS-specific issues
##### /run mounting
Mounting ```/run``` somehow breaks NixOS, set ```MOUNT_RUN``` in ```/etc/archbox.conf``` to anything other than ```yes``` to disable mounting ```/run```, then do :
```
archbox --mount-runtime-only
```
after user login to make XDG runtime directory accessible to chroot enviroment. make sure dbus unix:path is in XDG runtime directory too.
```
$ echo $XDG_RUNTIME_DIR
/run/user/1000
$ echo $DBUS_SESSION_BUS_ADDRESS
unix:path=/run/user/1000/bus
```
Or alternatively if you use WM-only, just disable mounting ```/run``` entirely and manually set XDG_RUNTIME_DIR into ```/tmp``` like ```/tmp/$(whoami)```.

##### Archbox didn't access resources in /usr/share
In Archbox, Symlink ```/usr``` to ```/run/current-system/sw```:
```
sudo mkdir -p /run/current-system/
sudo ln -s /usr /run/current-system/sw
```
make sure /run isn't mounted.

#### PulseAudio refused to connect
This can be caused by different dbus machine-id between chroot and host, copying ```/etc/machine-id``` from host to chroot should do the job.
#### Musl-based distros
Although /run is mounted in chroot enviroment on boot, XDG_RUNTIME_DIR is not visible in chroot enviroment, remounting /run will make it visible. do :
```
archbox --remount-run
```
after user login, Also if you use Void Musl, you need to kill every process that runs in XDG_RUNTIME_DIR when you log out, You need to reinstall archbox with ```--exp``` flag and use ```startx-killxdg``` instead of ```startx```, or run :
```
/usr/local/share/archbox/bin/remount_run killxdg
```
on logout. you can put it in ```/etc/gdm/PostSession/Default``` if you use GDM

Tested in Void Linux musl and Alpine Linux.

#### Polkit
```pkexec``` is kind of tricky to make it work in chroot, if you use rofi to launch GUI applications in chroot, you may not able to launch any ```.desktop``` files with ```Exec=pkexec...``` in it. If you really want them to work, you can do :
```
sudo ln -sf /usr/bin/sudo /usr/bin/pkexec
```
in chroot and prevent pacman from restoring ```/usr/bin/pkexec``` by editing ```NoExtract``` in ```/etc/pacman.conf```.

#### No sudo password in chroot by default.
You could use ```sudo``` in archbox, but you'll have no way to enter the password when doing e.g. ```archbox sudo pacman -Syu```. also you could enter the password if you do ```archbox -e < <(echo $COMMAND)```, but that would disable stdin entirely during $COMMAND.