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#!/bin/bash
##
#
# Version: 2016-07-06
#
##
##
#
# This script re-installs packages related to the IDOS timetable information system, to update them when an update is available.
# Since most packages are getting update upstream without any change in download URL, the packages are maintained in a similar way
# as version control system based packages (e.g. ${pkgname}-git-style, though not on a version control system the extension "-latest"
# is used). Thus, the version number of the packages in the AUR is purely cosmetic and reflects the current version from the time of
# the last submit to the AUR. Newer versions may be there, and so this script simply installs the latest version. The locally
# installed package will have the correct version number.
#
##
##
#
# This script depends on:
# * bash
# * yaourt
# * basic utilities: grep, sort, uniq.
# (Instead of grep, comm also can be used, by swapping the comment in front of the respective lines).
#
##
### Abort on error:
set -e
### Packages with these strings in their names are beeing re-installed by this script:
idos_pkgs_strings=(
'idos-'
'ttf-timetable'
)
get_installed_pkgs_version() {
# From all the packages given as arguments, returns their version number, line by line. If a package is not installed, return empty string, and:
# * If it is the only package given at the command line, finish with an exitcode >0.
# * If it is amongst other packages, silently ignore.
if [ $# -eq 1 ]; then
yaourt -Q "$1" | awk '{print $2}'
exitcode_query="$?"
else
while [ $# -gt 1 ]; do
yaourt -Q "$1" 2>/dev/null | awk '{print $2}'
shift
done
exitcode_query=0
fi
return "${exitcode_query}"
}
### Those variables will hold, line by line, the packages available for install and the one installed:
avail=''
installed=''
for pkg_string in "${idos_pkgs_strings[@]}"; do
### Get packages available for installation. The "echo ''" is there to get a newline added if new content is following.
avail+="$(echo ''; yaourt -S -q -s "${pkg_string}")"
### Get packages which are installed. The "echo ''" is there to get a newline added if new content is following.
installed+="$(echo ''; yaourt -Q -q -s "${pkg_string}"; echo "")"
done
### Sort and unify and remove blank lines:
avail="$(echo "${avail}" | sort | uniq | grep -E .)"
installed="$(echo "${installed}" | sort | uniq | grep -E .)"
### Get version numbers of installed packages before upgrade:
old_vers="$(echo "${installed}" | while read pkg; do get_installed_pkgs_version "${pkg}"; done)"
### Get packages which are installed and available for installation at the same time:
#installed_and_available="$(comm -1 -2 <(echo "${installed}" | sort) <(echo "${avail}" | sort))" # comm would do the job, on sorted files. grep also works on unsorted files.
installed_and_available="$(echo "${avail}" | grep -F -x "${installed}" | sort | uniq)"
### Print some information:
_reinstall_marker="(x)"
echo "Installed IDOS-related packages with version. Packages marked with '${_reinstall_marker}'"
echo "can and will be reinstalled."
echo ""
_pkgnr=0
echo "${installed}" | while read pkg; do
_pkgnr="$(( ${_pkgnr} + 1 ))"
if echo "${avail}" | grep -q -F -x "${pkg}"; then echo -n " ${_reinstall_marker} "; else echo -n " "; fi
echo -n "${pkg} "; echo "${old_vers}" | sed -n "${_pkgnr}"p
done
echo ""
### Reinstall installed and available packages:
yaourt -S --noconfirm ${installed_and_available}
### Get version numbers of installed packages after upgrade:
new_vers="$(echo "${installed}" | while read pkg; do get_installed_pkgs_version "${pkg}"; done)"
### Print information about changes that were carried out:
echo "Upgrade results ('(y)': Upgraded, '(n)': Not upgraded, no marker: Not"
echo "available in repositories) with version information:"
echo ""
_pkgnr=0
echo "${installed}" | while read pkg; do
_pkgnr="$(( ${_pkgnr} + 1 ))"
_old_ver="$(echo "${old_vers}" | sed -n "${_pkgnr}"p)"
_new_ver="$(echo "${new_vers}" | sed -n "${_pkgnr}"p)"
if [[ "${_old_ver}" == "${_new_ver}" ]]; then
if echo "${avail}" | grep -q -F -x "${pkg}"; then echo -n " (n) "; else echo -n " "; fi
else
echo -n " (y) "
fi
echo -n "${pkg} "
echo -n "${_old_ver} "
if [[ "${_old_ver}" == "${_new_ver}" ]]; then
echo "(not upgraded.)"
else
echo "-> ${_new_ver}"
fi
done
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