archinstall VS archiso

In any case, have you studied https://wiki.archlinux.org/title/Archinstall and https://github.com/archlinux/archinstall. While archinstall is new and has the expected bugs, I've not had your issues before. You might try an earlier ISO, like Oct 2023, though it's not clear if you're using an ISO or the archinstall installed package.

I'm using my laptop as dual boot between Manjaro and Windows 10, I tried for months to install ArchLinux using archinstall tool but the operation always fails with random errors, because I want to install it on a single ext4 partition like how Manjaro is installed. Is there any trusted GUI installer that uses calamares and can install pure ArchLinux ?

The related issue https://github.com/archlinux/archinstall/issues/1111 implies it's fixed, but either way, you can just securely delete your password after the install.

Mount that partition as /efi. Change this in your /etc/fstab as well. This is a good time to remove all the weird carriage returns that archinstall puts in your fstab file (https://github.com/archlinux/archinstall/issues/1399).

Most distros have a nice graphical installer which does make things less of a hassle. But these days Arch also bundles archinstall which is quite easy to use and supports a few display environments for automatic setup right out the gate which is nice.

Or just use archinstall which is official part of the iso file.

You can post an issue at: https://github.com/archlinux/archinstall to get the attention of the developer. He's represented here but I forget his user id.

If you're still suffering with this problem: Maybe try to find the file/module on your system. If it's present, you might want to try to run this pacman -Sy python archinstall (found it here: https://github.com/archlinux/archinstall/issues/1810) to reinstall python and the archinstall script. I hope that this helps you.

Still feels that it is in rapid development phase, rather than just maintenance, last month I encountered this bug

Read up on Arch iso : https://github.com/archlinux/archiso

Yes. They come from /etc/motd, and you can see the escape codes in https://github.com/archlinux/archiso/blob/master/configs/releng/airootfs/etc/motd

this is not clearly mentioned in your original post, but I assume you also would like to create a dedicated(?) installer for this potential derivative. Arch Linux (and quite a few of its derivatives) use archiso for this to create installation/ rescue media based on profiles. The default installation medium now contains archinstall, which allows for installation of systems based on profiles. I have been maintaining archiso for over 1.5 years now and it has been a lot of work so far, getting things back in shape. However, I believe it is a viable, minimal solution for the task.

Let's discuss this in private, and then post the result here. And yes, nothing changed, here is the script that Arch developers use to generate their iso.

In the meantime you can build the installation medium yourself though, if you have an Arch installation available: https://gitlab.archlinux.org/archlinux/archiso/

No the default mkinitcpio doesn't have the capability to do that at all. archiso provides its own mkinitcpio hook for copytoram, which is somewhat specific to arch. https://github.com/archlinux/archiso/blob/master/archiso/initcpio/hooks/archiso