121 lines
2.3 KiB
Plaintext
121 lines
2.3 KiB
Plaintext
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#!/bin/sh
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# Try to guess at whether the user would like a desktop installed on their
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# system. Of course Debian has many users who use it on a wide array of
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# hardware, so this is tricky, but it's only a default.
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set -e
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if ! [ "$NEW_INSTALL" ]; then
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exit 3
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fi
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arch="$(dpkg --print-architecture)"
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unmark () {
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exit 3
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}
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mark () {
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exit 2
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}
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# A few arches have the lion's share of desktops.
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common_desktop_architecture () {
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case "$arch" in
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i386|amd64|powerpc*)
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return 0
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;;
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*)
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return 1
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;;
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esac
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}
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# On some arches it's almost unheard of to run a desktop, at least using
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# this task.
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unlikely_desktop_architecture () {
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case "$arch" in
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m68k|s390|s390x|hppa)
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return 0
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;;
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*)
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return 1
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;;
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esac
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}
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# Modern desktops take a lot of ram.
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enough_ram () {
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min_ram=64 # MiB
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ram=$(grep ^MemTotal: /proc/meminfo | { read x y z; echo $y; }) || true # kb
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# The 4 is a fuzz factor to allow for kernel ram usage.
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if [ "$ram" ] && [ "$ram" -ge "$(expr $(expr $min_ram - 4) \* 1024)" ]; then
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return 0
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else
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return 1
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fi
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}
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# The desktop task requires 2 gb or so of disk in /usr, and .5 in /var for
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# the debs.
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# FIXME: this should really be generalised and used for tasksel to not
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# suggest any task for which there is not enough disk.
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enough_disk () {
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min_disk=3
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disk=$(df -P /usr | tail -1 | awk '{print $4}')
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if [ "$disk" ] && [ "$disk" -ge "$(expr $min_disk \* 1024 \* 1024)" ]; then
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return 0
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else
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return 1
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fi
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}
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desktop_hardware () {
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if which laptop-detect >/dev/null 2>&1 && \
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laptop-detect; then
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# Nearly always appropriate to include a desktop.
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return 0
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else
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# TODO: test for the existence of a framebuffer and a mouse.
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# A mouse, in particular, almost always indicates a
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# desktop.
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:
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fi
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return 1
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}
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rack_hardware () {
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if which dmidecode >/dev/null 2>&1 && \
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dmidecode | grep -q 'Type: Rack Mount Chassis'; then
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return 0
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fi
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# XXX further heuristics here to avoid selecting the task on
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# high-end hardware that's intended to be used as a server.
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# For example, if it has two NICs with link, it's probably a
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# server.
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return 1
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}
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if ! enough_ram || ! enough_disk; then
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unmark
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fi
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if desktop_hardware; then
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mark
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fi
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if unlikely_desktop_architecture; then
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unmark
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elif common_desktop_architecture; then
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if rack_hardware; then
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unmark
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else
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mark # probably a desktop ...
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fi
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else
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# XXX further heuristics here
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:
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fi
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unmark
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