/lib/partman/finish.d/70aptinstall_basicfilesystems is in ubiquity 18.04.14.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | #!/bin/sh
. /lib/partman/lib/base.sh
swap=no
ext2=no
fat=no
for dev in $DEVICES/*; do
[ -d "$dev" ] || continue
cd $dev
partitions=
open_dialog PARTITIONS
while { read_line num id size type fs path name; [ "$id" ]; }; do
[ "$fs" != free ] || continue
[ -f $id/method -a -f $id/acting_filesystem ] || continue
filesystem=$(cat $id/acting_filesystem)
case $filesystem in
linux-swap)
swap=yes
;;
ext2)
ext2=yes
;;
fat16|fat32)
fat=yes
;;
esac
done
close_dialog
done
if [ "$ext2" = yes ]; then
apt-install e2fsprogs || true
fi
if [ "$fat" = yes ]; then
apt-install dosfstools || true
fi
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