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|
#!/usr/bin/env bash
# libredbdiff
#
# Copyright (C) 2014 Esteban Carnevale <alfplayer@mailoo.org>
# Copyright (C) 2014, 2017 Luke Shumaker <lukeshu@sbcglobal.net>
#
# License: GNU GPLv3+
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
set -euE -o pipefail
. "$(librelib messages)"
. "$(librelib conf)"
setup_traps
declare -r name="Libredbdiff"
declare -r cmd="${0##*/}"
declare -r field_pkgname_prbl=30
declare -r field_pkgname_arch=30
declare -r field_pkgname_total="$((field_pkgname_prbl + field_pkgname_arch))"
declare -r printf_format="%s %-${field_pkgname_prbl}s%-${field_pkgname_arch}s %s | %s\n"
declare -r printf_format_noarch="%s %-${field_pkgname_total}s %s\n"
init_conf() {
declare -rg conffile_prbl="$statedir/pacman.conf.parabola"
declare -rg conffile_arch="$statedir/pacman.conf.archlinux"
declare -rg dbpath_prbl="$statedir/pacman.parabola"
declare -rg dbpath_arch="$statedir/pacman.archlinux"
declare -rg mirrorlist_prbl="$statedir/mirrorlist.parabola"
declare -rg mirrorlist_arch="$statedir/mirrorlist.archlinux"
}
enablerepo() {
local repo="$1"
local conffile_arg="$2"
msg2 "Enabling repo %q in %q" "$repo" "$conffile_arg"
sed -i "s/\#\[$repo\]/[$repo]/" "$conffile_arg"
sed -i "\/\[$repo\]/,+1 s/#Include/Include/" "$conffile_arg"
}
createdir() {
local dir=$1
if ! [[ -d "$dir" ]] ; then
msg "Creating directory %q" "$dir"
mkdir -- "$dir" || die "Failed to create directory %q. Exiting." "$dir"
fi
}
# {{ A -lt B }} is like [ A -lt B ], but for pacman version numbers
{{() {
[[ $# = 4 ]] || panic
[[ $4 = '}}' ]] || panic
local a=$1
local op=$2
local b=$3
local cmp
cmp="$(vercmp "$a" "$b")" || die "vercmp failed"
[ "$cmp" "$op" 0 ]
}
# Globals:
# - pkgname : the Parabola pkgname
# - ver_prbl : a map of pkgname->arch_pkgver
# - ver_arch : a map of pkgname->prbl_pkgver
# - provides : a map of pkgname->provides
compare_pkgs() {
if [[ -n "${ver_arch[$pkgname]:-}" ]]; then
if {{ "${ver_prbl[$pkgname]}" -lt "${ver_arch[$pkgname]}" }}; then
printf "$printf_format" \
'=' \
"$pkgname" \
"" \
"${ver_prbl[$pkgname]}" \
"${ver_arch[$pkgname]}"
fi
elif [[ -n "${provides[$pkgname]:-}" ]]; then
local _provides provide
read -r -a _provides <<<"${provides[$pkgname]}"
for provide in "${_provides[@]}"; do
if [[ -n "${ver_arch[$provide]:-}" ]]; then
if {{ "${ver_prbl[$pkgname]}" -lt "${ver_arch[$provide]}" }}; then
printf "$printf_format" \
'p' \
"$pkgname" \
"$provide" \
"${ver_prbl[$pkgname]}" \
"${ver_arch[$provide]}"
fi
fi
done
else
printf "$printf_format_noarch" \
'o' \
"$pkgname" \
"${ver_prbl[$pkgname]}"
fi
}
# Globals:
# - prbl_packages_tmp
# - ver_prbl
# - ver_arch (transitively through compare_pkgs)
# - provides
print_cmp() {
local repo="$1"
< "$prbl_packages_tmp" \
awk -F/ -v repo="$repo" '$1 == repo {print $2}' |
while read -r pkgname _pkgver _provides ; do
ver_prbl["$pkgname"]="$_pkgver"
provides["$pkgname"]="$_provides"
compare_pkgs
done
}
usage() {
print "Usage: sudo %q" "$cmd"
print " or: %q -n [REPO]" "$cmd"
print " or: %q -h" "$cmd"
print 'Show packages that need to be updated from Arch repositories.'
echo
prose "Compares packages in Parabola repositories. Packages from
all configured Parabola repositories are compared. A Parabola
repository name can be specified as argument to compare only
packages in that repository."
echo
prose "The default mode of operation requires root, and downloads or
updates all necessary files for comparison, but does not compare
them. After that mode has been run, run the tool again without
root with the the \`-n\` flag to not download anything, but to
compare the already downloaded files."
echo
prose "In the compare mode (if the \`-n\` flag is given), by default it
will iterate over each of the configured repositories, prefixing
each section with a line in the format \`[REPO]\`. However, if a
REPO is specified on the command line, it scan for packages only
in that repository, and no \`[REPO]\` line will be printed."
echo
print 'Options:'
flag '-n' "Don't update anything, just compare already downloaded files."
flag '-h' 'Show this message'
echo
prose "In the compare mode the output is in the format:"
echo
print '\t[repo]'
print '\tpkgline'
print '\tpkgline'
print '\t...'
print '\t[repo]'
print '\tpkgline'
print '\tpkgline'
print '\t...'
echo
prose "That is, the output is organized by Parabola repository, and
within each repository section, there is one line for each
package in that Parabola repo that seems to be behind the
equivalent package in Arch."
echo
print "The line-format for packages is:"
printf "\t$printf_format" \
status parabola_pkgname '[arch_pkgname]' parabola_pkgver arch_pkgver
echo
print "Where 'status' is one of the characters:"
flag '=' "An Arch package with the same pkgname as a Parabola package
was found, and Arch has a higher pkgver than Parabola. In
this case, arch_pkgname is not present (as it is the same as
the parabola_pkgname)."
flag 'p' "An Arch package with a pkgname that is provide'd by a Parabola
package was found, and the pkgver of the Arch package is
higher than the pkgver of the parabola package."
flag 'o' "It appears that this Parabola package is not a replacement for
an Arch package."
}
main() {
local args arg mode=update badargs=false
args="$(getopt -n "$cmd" -o nh -l noupdate,help -- "$@")" || badargs=true
eval "set -- $args"
while [[ $# -gt 0 ]]; do
arg=$1
shift
case "$arg" in
-n|--noupdate)
mode=compare
;;
-h|--help)
usage
exit $EXIT_SUCCESS
;;
--)
break
;;
esac
done
if $badargs; then
usage >&2
exit $EXIT_INVALIDARGUMENT
fi
case $mode in
update)
if [[ $# -gt 0 ]]; then
print "%s: found non-flag arguments; a repo list may only be specified with the -n flag: %s" "$cmd" "$*" >&2
usage >&2
exit $EXIT_INVALIDARGUMENT
fi
if [[ $EUID != 0 ]]; then
error "Must run as root to initialize or update %s databases." "$cmd"
usage >&2
exit $EXIT_NOPERMISSION
fi
load_conf libredbdiff.conf statedir mirror_prbl mirror_arch || exit
init_conf
main_update
;;
compare)
if [[ $# -gt 1 ]]; then
print "%s: found too many non-flag arguments; only one repo may be specified: %s" "$cmd" "$*" >&2
usage >&2
exit $EXIT_INVALIDARGUMENT
fi
load_conf libredbdiff.conf statedir repos || exit
init_conf
if [[ $# = 1 ]]; then
if ! in_array "$1" "${repos[@]}"; then
die "The specified Parabola repo \"%s\" cannot be compared. It's not in the list of repos in the configuration variable \"repos\"." "$1"
fi
fi
main_compare "$@"
;;
esac
}
main_update() {
createdir "$statedir"
{
msg "Generating %s %q" Parabola pacman.conf
cp -T /usr/share/pacman/defaults/pacman.conf.x86_64 "$conffile_prbl"
sed -r \
-e "s|/etc/pacman\.d/mirrorlist$|$mirrorlist_prbl|" \
-e "s|^#?DBPath\s*=.*|DBPath = $dbpath_prbl|" \
-e "s|^#?Architecture\s*=.*|Architecture = x86_64|" \
-i "$conffile_prbl"
local repo
for repo in multilib {libre,pcr,nonprism}{,-multilib}; do
enablerepo "$repo" "$conffile_prbl"
done
msg "Generating %s %q" Arch pacman.conf
wget -q \
-O "$conffile_arch" \
"https://git.archlinux.org/svntogit/packages.git/plain/pacman/repos/core-x86_64/pacman.conf.x86_64" ||
die "Failed to download %q. Exiting." "$conffile_arch"
sed -r \
-e "s|/etc/pacman\.d/mirrorlist$|$mirrorlist_arch|" \
-e "s|^#?DBPath\s*=.*|DBPath = $dbpath_arch|" \
-e "s|^#?Architecture\s*=.*|Architecture = x86_64|" \
-i "$conffile_arch"
enablerepo multilib "$conffile_arch"
printf 'Server = %s\n' "$mirror_prbl" > "$mirrorlist_prbl"
printf 'Server = %s\n' "$mirror_arch" > "$mirrorlist_arch"
}
createdir "$dbpath_prbl"
{
msg "Synchronizing %s pacman databases for %s" "$name" "Parabola"
pacman --config "$conffile_prbl" -Sy ||
die "Failed to synchronize pacman database for %s. Exiting." Parabola
}
createdir "$dbpath_arch"
{
msg "Synchronizing %s pacman databases for %s" "$name" "Arch"
pacman --config "$conffile_arch" -Sy ||
die "Failed to synchronize pacman database for %s. Exiting." Arch
}
msg "%s pacman databases are updated. %s is ready. Run %q -n to print results." \
"$name" "$name" "$cmd"
}
main_compare() {
if ! [[ -f "$conffile_prbl" && \
-f "$conffile_arch" && \
-f "$dbpath_prbl/sync/libre.db" && \
-f "$dbpath_arch/sync/core.db" ]]
then
error "You must run %q with out arguments as root to initialize." "$cmd"
usage >&2
exit $EXIT_INVALIDARGUMENT
fi
local tmpdir
tmpdir="$(mktemp --tmpdir -d "$cmd.XXXXXXXXXX")" || die "Could not create temporary working directory"
trap "rm -rf -- $(printf %q "$tmpdir")" RETURN
local arch_packages_tmp="$tmpdir/arch-packages"
local prbl_packages_tmp="$tmpdir/parabola-packages"
unset provides ver_prbl ver_arch
declare -gA provides ver_prbl ver_arch
expac --config "$conffile_arch" -S '%n %v' \
> "$arch_packages_tmp" || \
die "expac command to get %s package data has failed. Exiting." Arch
local pkgname pkgver
while read -r pkgname pkgver; do
ver_arch["$pkgname"]="$pkgver"
done < "$arch_packages_tmp"
expac --config "$conffile_prbl" -S '%r/%n %v %S' \
> "$prbl_packages_tmp" || \
die "expac command to get %s package data has failed. Exiting." Parabola
if [[ $# == 1 ]]; then
print_cmp "$1"
else
for repo in "${repos[@]}" ; do
echo "[$repo]"
print_cmp "$repo"
done
fi
}
main "$@"
|