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# vim: filetype=sh
# Package management
# ------------------
package_is_installed()
{
dpkg-query -W --showformat='${Status}\n' \
$1 2>/dev/null | happy_grep -c "^i"
}
list_available_packages()
{
apt-cache search "$1" | awk '{print $1}'
}
package_exists()
{
[ "$(list_available_packages "^$1$")" = "$1" ]
}
apt_sources_add_section()
{
section="$1"
if grep "^#.*\<deb[[:space:]].*${section}" /etc/apt/sources.list
then
# lines are there, but they are commented, just uncomment them
sed -i -e "s/^#[[:space:]#]*\(\<deb[[:space:]].*\<${section}\>\)/\1/g" /etc/apt/sources.list
else
# no lines for this section, edit lines with section main
sed -i -e "s/\(^[[:space:]]*deb[[:space:]].*\<main\>\)/\1 ${section}/g" /etc/apt/sources.list
fi
}
# with some OS versions, package installation
# causes many things to be printed to stderr. Some of those things
# are just informational, others are very minor warnings.
# we will silence them with grep.
INSTALL_GREP_PATTERN="$(cat << EOF | tr -d '\n'
(delaying package configuration)|(Done.)|(^Moving old)|(^Running)|
(^update-initramfs: deferring)|(^Examining)|(^run-parts: executing)|
(^update-initramfs: Generating)|(^initrd.img)|(points to)|
(doing nothing)|(^vmlinu)|(connect to Upstart)|(policy-rc.d denied)|
(Creating config)|(^$)|(start and stop actions)|(^Created symlink)|
(Initializing machine ID)|(:$)|(etc.modprobe.d)|
(initramfs support missing)|(policy-rc.d returned 101)|
(update-alternatives: warning: skip creation)|
(Secure Boot validation state)|(if you wish to change)|
(default time zone)|(time is now)|(Time is now)|
(^Creating group)|(^Creating user)|(using gzip)
EOF
)"
install_packages()
{
packages=$*
# disable service startup at package installation
if [ -e /usr/sbin/policy-rc.d ]
then
mv /usr/sbin/policy-rc.d /usr/sbin/policy-rc.d.saved
fi
echo exit 101 > /usr/sbin/policy-rc.d
chmod +x /usr/sbin/policy-rc.d
err_output="$(
apt-get -qq --no-install-recommends -o=Dpkg::Use-Pty=0 \
install $packages 2>&1 >/dev/null
)" || return_code=$?
echo "$err_output" | happy_grep -vE "$INSTALL_GREP_PATTERN" 1>&2
# restore policy-rc.d conf
if [ -e /usr/sbin/policy-rc.d.saved ]
then
mv /usr/sbin/policy-rc.d.saved /usr/sbin/policy-rc.d
else
rm /usr/sbin/policy-rc.d
fi
# the return value we want is the one we caught
# earlier (or none if all went well):
return $return_code
}
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