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[apt.git] / debian / preinst
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1#! /bin/sh
2
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3set -e
4
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5# dpkg does this for us while we are upgrading..
6#if [ "$1" = "upgrade" -a -L /var/state/apt -a -e /var/lib/apt -a ! -L /var/state/apt ] && dpkg --compare-versions "$2" ">=" "0.4.10"; then
7# rm /var/state/apt
8#fi
9
10if [ "$1" = "upgrade" -o "$1" = "install" -a "$2" != "" ]; then
11 if [ ! -e /var/lib/apt -a -e /var/state/apt ]; then
12 # upgrading from /var/state/apt using apt.
13 # it's probably running now so we want to ensure /var/state/apt
14 # is still valid afterwards. and since we're upgrading
15
16 if [ -x /usr/bin/perl -a -d /var/state/apt -a ! -L /var/state/apt ] &&
17 perl -e 'exit 1 if ((stat("/var/lib"))[0] != (stat("/var/state/apt"))[0])'
18 then
19 # same fs, we can mv it
20 mv /var/state/apt /var/lib/apt
21 ln -s ../lib/apt /var/state/apt
22 # note that this symlink (/var/state/apt) will be removed when
23 # dpkg finishes unpacking the apt we're about to install; this is okay
24 else
25 # scary, let's just symlink it and hope
26 ln -s /var/state/apt /var/lib/apt
27 fi
28 fi
29 touch /var/lib/apt/lists/partial/.delete-me-later || true
30fi
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31
32#DEBHELPER#