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#!/bin/sh
# Try to guess at whether the user would like a desktop installed on their
# system. Of course Debian has many users who use it on a wide array of
# hardware, so this is tricky, but it's only a default.
set -e
if ! [ "$NEW_INSTALL" ]; then
exit 3
fi
arch="$(dpkg --print-architecture)"
unmark () {
exit 3
}
mark () {
exit 2
}
# A few arches have the lion's share of desktops.
common_desktop_architecture () {
case "$arch" in
i386|amd64|powerpc*)
return 0
;;
*)
return 1
;;
esac
}
# On some arches it's almost unheard of to run a desktop, at least using
# this task.
unlikely_desktop_architecture () {
case "$arch" in
m68k|s390|hppa)
return 0
;;
*)
return 1
;;
esac
}
# Modern desktops take a lot of ram.
enough_ram () {
min_ram=64
ram=$(grep ^MemTotal: /proc/meminfo | { read x y z; echo $y; }) || true # kb
# The 4 is a fuzz factor to allow for kernel ram usage.
if [ "$ram" ] && [ "$ram" -ge "$(expr $(expr $min_ram - 4) \* 1024)" ]; then
return 0
else
return 1
fi
}
# The desktop task requires 2 gb or so of disk in /usr, and .5 in /var for
# the debs.
# FIXME: this should really be generalised and used for tasksel to not
# suggest any task for which there is not enough disk.
enough_disk () {
min_disk=3
disk=$(df -P /usr | tail -1 | awk '{print $4}')
if [ "$disk" ] && [ "$disk" -ge "$(expr $min_disk \* 1024 \* 1024)" ]; then
return 0
else
return 1
fi
}
desktop_hardware () {
if which laptop-detect >/dev/null 2>&1 && \
laptop-detect; then
# Nearly always appropriate to include a desktop.
return 0
else
# TODO: test for the existence of a framebuffer and a mouse.
# A mouse, in particular, almost always indicates a
# desktop.
:
fi
return 1
}
rack_hardware () {
if which dmidecode >/dev/null 2>&1 && \
dmidecode | grep -q 'Type: Rack Mount Chassis'; then
return 0
fi
# XXX further heuristics here to avoid selecting the task on
# high-end hardware that's intended to be used as a server.
# For example, if it has two NICs with link, it's probably a
# server.
return 1
}
if ! enough_ram || ! enough_disk; then
unmark
fi
if desktop_hardware; then
mark
fi
if unlikely_desktop_architecture; then
unmark
elif common_desktop_architecture; then
if rack_hardware; then
unmark
else
mark # probably a desktop ...
fi
else
# XXX further heuristics here
:
fi
unmark