Create directories and copy files to the FAT image using mtools instead of mounting the file system

- mtools supports SOURCE_DATE_EPOCH.
- The image file is operated on directly instead of mounting the file system. This is a prerequisite to limit the commands that run with root privileges. Related to https://gitlab.archlinux.org/archlinux/archiso/-/issues/40 .
- Add a reminder comment to not get rid of the dosfstools dependency, since a mformat made FAT image can fail to boot on some systems.

1 files changed, 1 insertions, 0 deletions

diff --git a/README.rst b/README.rst
index c4774c0..cfc47fa 100644
--- a/README.rst
+++ b/README.rst
@@ -15,6 +15,7 @@ The following packages need to be installed to be able to create an image with t
 * dosfstools
 * e2fsprogs
 * libisoburn
+* mtools
 * squashfs-tools
 
 For running the images in a virtualized test environment the following packages are required: