The chosen partitions will be formatted and mounted and then the live system will be copied onto them. After this has completed, all the live modifications are removed/undone so that a normal Arch Linux system is left.
larch(in) also provides for further tweaks during the installation process by means of the larch/copy/install-tweak file on the live medium, which is run at the end of this stage. The contents of this file are entirely left up to the creator of the larch profile.
The individual steps are:
Because of the way block devices are detected in Linux it is possible under certain circumstances for a partition to get assigned a different name (e.g. /dev/sda can become /dev/sdb) from one boot to the next. For this reason it is often sensible to address these devices in a more stable way in grub and /etc/fstab.
???The default in larchin is to use the device LABEL, if there is one, otherwise the UUID. Only if the checkbox 'Use device name' is checked will the device name (/dev/sda1, etc.) be used.
To allow tweaking of the way partitions are formatted, the syscall script 'part-format' sources a script in the sub-directory 'tweaks' with a name built from the file-system type, 'tweaks/format-fstype'. If you want to make use of this feature, see the 'part-format' script.