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#!/bin/sh
# print a list of PostgreSQL versions that are supported for the platform this
# script runs on.
# Note: Newer installed versions than the highest one listed here are always
# considered supported, so that backports will not cause an "obsolete" warning.
#
# /usr/share/postgresql-common/supported-versions decides which PostgreSQL
# server versions are supported. This information is used
# 1) for notifying users of obsolete versions, suggesting to upgrade
# 2) by postgresql-common itself (in debian/rules) to determine the
# dependencies of the postgresql meta packages (default version), and to
# generate the list of postgresql-server-dev-* packages
# postgresql-server-dev-all depends on
# 3) by the pg_buildext tool to decide which server versions to build extension
# modules for
#
# The *last* version returned here will be considered the default version, the
# remaining lines list other supported versions in an undefined order.
#
# * PG_SUPPORTED_VERSIONS
# * DEB_PG_SUPPORTED_VERSIONS
# * ~/.pg_supported_versions
# * /etc/postgresql-common/supported_versions
# (in that order) can be used to override the defaults. (Tokens separated by
# newlines.)
#
# Recognized tokens:
# default: use the appropiate defaults for the current distribution
# (as determined by os-release)
# debian: use Debian defaults
# debian-backports: use Debian Backports defaults
# ubuntu: use Ubuntu defaults
# pgdg: use defaults for apt.postgresql.org
# installed: consider all installed versions supported (determined by
# postgresql-server-dev-X packages)
# X: consider this version supported
#
# (C) 2005-2016 Martin Pitt <mpitt@debian.org>
# (C) 2012-2023 Christoph Berg <myon@debian.org>
set -eu
DEFAULT="16"
# functions
default() {
. /etc/os-release
case "$ID" in
[uU]buntu)
ubuntu
;;
[dD]ebian)
debian
;;
*)
echo "supported-versions: WARNING! Unknown distribution ID in /etc/os-release: $ID" >&2
if echo $ID_LIKE | grep -E '(^| )ubuntu($| )' > /dev/null; then
echo "ubuntu found in ID_LIKE, treating as Ubuntu" >&2
ubuntu
elif echo $ID_LIKE | grep -E '(^| )debian($| )' > /dev/null; then
echo "debian found in ID_LIKE, treating as Debian" >&2
debian
else
echo "Please submit this as a bug report to your distribution." >&2
/bin/echo -e "$DEFAULT"
fi
;;
esac
}
ubuntu() {
echo "$DEFAULT"
}
debian() {
echo "$DEFAULT"
}
debian_backports() {
echo "$DEFAULT"
}
pgdg() {
cat <<-EOF
10
11
12
13
14
15
16
EOF
}
installed() {
dpkg -l 'postgresql-server-dev-[1-9]*' | \
sed -ne 's/^ii *postgresql-server-dev-\([^ ]*\).*/\1/p' | \
sort -V
}
# main
if [ "${PG_SUPPORTED_VERSIONS:-}" ] ; then
SUPPORTED_VERSIONS=$(echo "$PG_SUPPORTED_VERSIONS" | xargs -n1)
elif [ "${DEB_PG_SUPPORTED_VERSIONS:-}" ] ; then
SUPPORTED_VERSIONS=$(echo "$DEB_PG_SUPPORTED_VERSIONS" | xargs -n1)
elif [ -f ${HOME:-}/.pg_supported_versions ] ; then
SUPPORTED_VERSIONS="$(cat ${HOME:-}/.pg_supported_versions)"
elif [ -f ${PGSYSCONFDIR:-/etc/postgresql-common}/supported_versions ] ; then
SUPPORTED_VERSIONS="$(cat ${PGSYSCONFDIR:-/etc/postgresql-common}/supported_versions)"
else
SUPPORTED_VERSIONS="default"
fi
echo "$SUPPORTED_VERSIONS" | while read version release; do
COMMENT="#"
case $version in
"") ;;
$COMMENT*) ;;
default)
default
;;
debian)
debian
;;
debian-backports)
debian_backports
;;
ubuntu)
ubuntu
;;
pgdg) # apt.postgresql.org
pgdg
;;
installed)
installed
;;
*)
/bin/echo -e "$version"
;;
esac
done
exit 0
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