This file is indexed.

postinst is in gnome-icon-theme-full 3.10.0-0ubuntu2.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#! /bin/sh
set -e

write_cache()
{
if [ -x /usr/bin/gtk-update-icon-cache-3.0 ]; then
    if ! gtk-update-icon-cache-3.0 --force --quiet /usr/share/icons/gnome; then
        echo "WARNING: icon cache generation failed"
    fi
fi
}

if [ "$1" = "triggered" ]; then
    write_cache
    exit 0
fi

SIZES=$(ls /usr/share/icons/gnome/*/places | sed -rn 's,^.*/([0-9]+)x[0-9]+/.*$,\1,p')

( while read name prio; do
    command="update-alternatives --install /usr/share/icons/gnome/scalable/places/start-here.svg start-here.svg /usr/share/icons/gnome/scalable/places/$name.svg $prio"
    for s in $SIZES; do
      command="$command --slave /usr/share/icons/gnome/${s}x${s}/places/start-here.png start-here-${s}.png /usr/share/icons/gnome/${s}x${s}/places/$name.png"
    done
    $command
  done ) << EOF
ubuntu-logo 60
debian-swirl 30
gnome-foot 20
EOF

write_cache