What were you trying to do that didn't work?

Run a kickstart installation with a disk partitioning layout not having enough disk space for the selected packages.

When such an installation is executed in text mode, anaconda checks the disk space and do not start the installation, which is expected.

In cmdline mode, anaconda starts the installation (formatting the disk, downloading the packages), and fails later when running the RPM transaction or installing flatpaks due to insufficient disk space.

An example kickstart file with 1GB rootfs:

lang en_US.UTF-8
keyboard us
reboot
cmdline
rootpw redhat
timezone --utc America/New_York

bootloader --location=mbr
zerombr
clearpart --all --initlabel
reqpart
part / --size=1024

%packages --default
%end

Please provide the package NVR for which the bug is seen:

anaconda-40.22.3.39-1.el10

How reproducible is this bug?:

Always

Steps to reproduce

1. Use the kickstart above to try to install RHEL in cmdline mode.

Expected results

The installer should complain about insufficient disk space BEFORE formatting disks and downloading packages. This is how text mode behaves.

Actual results

Disks are formatted, packages downloaded, RPM transactions fails. Logs are available in ATTACH-15479.