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# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
inherit user
EXPORT_FUNCTIONS pkg_setup
# @ECLASS: postgres
# @MAINTAINER:
# PostgreSQL <pgsql-bugs@gentoo.org>
# @AUTHOR: Aaron W. Swenson <titanofold@gentoo.org>
# @BLURB: An eclass for PostgreSQL-related packages
# @DESCRIPTION:
# This eclass provides common utility functions that many
# PostgreSQL-related packages perform, such as checking that the
# currently selected PostgreSQL slot is within a range, adding a system
# user to the postgres system group, and generating dependencies.
case ${EAPI:-0} in
5|6) ;;
*) die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}" ;;
esac
# @ECLASS-VARIABLE: POSTGRES_COMPAT
# @DESCRIPTION:
# A Bash array containing a list of compatible PostgreSQL slots as
# defined by the developer. If declared, must be declared before
# inheriting this eclass. Example: POSTGRES_COMPAT=( 9.4 9.{5,6} )
# @ECLASS-VARIABLE: POSTGRES_USEDEP
# @DESCRIPTION:
# Add the 2-Style and/or 4-Style use dependencies without brackets to be used
# for POSTGRES_DEP. If declared, must be done before inheriting this eclass.
# @ECLASS-VARIABLE: POSTGRES_DEP
# @DESCRIPTION:
# An automatically generated dependency string suitable for use in
# DEPEND and RDEPEND declarations.
# @ECLASS-VARIABLE: POSTGRES_REQ_USE
# @DESCRIPTION:
# An automatically generated REQUIRED_USE-compatible string built upon
# POSTGRES_COMPAT. REQUIRED_USE="... ${POSTGRES_REQ_USE}" is only
# required if the package must build against one of the PostgreSQL slots
# declared in POSTGRES_COMPAT.
if declare -p POSTGRES_COMPAT &> /dev/null ; then
# Reverse sort the given POSTGRES_COMPAT so that the most recent
# slot is preferred over an older slot.
# -- do we care if dependencies are deterministic by USE flags?
readarray -t POSTGRES_COMPAT < <(printf '%s\n' "${POSTGRES_COMPAT[@]}" | sort -nr)
POSTGRES_DEP=""
POSTGRES_REQ_USE=" || ("
for slot in "${POSTGRES_COMPAT[@]}" ; do
POSTGRES_DEP+=" postgres_targets_postgres${slot/\./_}? ( dev-db/postgresql:${slot}="
declare -p POSTGRES_USEDEP &>/dev/null && \
POSTGRES_DEP+="[${POSTGRES_USEDEP}]"
POSTGRES_DEP+=" )"
IUSE+=" postgres_targets_postgres${slot/\./_}"
POSTGRES_REQ_USE+=" postgres_targets_postgres${slot/\./_}"
done
POSTGRES_REQ_USE+=" )"
else
POSTGRES_DEP="dev-db/postgresql:="
declare -p POSTGRES_USEDEP &>/dev/null && \
POSTGRES_DEP+="[${POSTGRES_USEDEP}]"
fi
# @FUNCTION: postgres_check_slot
# @DESCRIPTION:
# Verify that the currently selected PostgreSQL slot is set to one of
# the slots defined in POSTGRES_COMPAT. Automatically dies unless a
# POSTGRES_COMPAT slot is selected. Should be called in pkg_pretend().
postgres_check_slot() {
if ! declare -p POSTGRES_COMPAT &>/dev/null; then
die 'POSTGRES_COMPAT not declared.'
fi
# Don't die because we can't run postgresql-config during pretend.
[[ "$EBUILD_PHASE" = "pretend" && -z "$(which postgresql-config 2> /dev/null)" ]] \
&& return 0
if has $(postgresql-config show 2> /dev/null) "${POSTGRES_COMPAT[@]}"; then
return 0
else
eerror "PostgreSQL slot must be set to one of: "
eerror " ${POSTGRES_COMPAT[@]}"
die "Incompatible PostgreSQL slot eselected"
fi
}
# @FUNCTION: postgres_new_user
# @DESCRIPTION:
# Creates the "postgres" system group and user -- which is separate from
# the database user -- in addition to the developer defined user. Takes
# the same arguments as "enewuser".
postgres_new_user() {
enewgroup postgres 70
enewuser postgres 70 /bin/bash /var/lib/postgresql postgres
if [[ $# -gt 0 ]] ; then
if [[ "$1" = "postgres" ]] ; then
ewarn "Username 'postgres' implied, skipping"
else
local groups=$5
[[ -n "${groups}" ]] && groups+=",postgres" || groups="postgres"
enewuser "$1" "${2:--1}" "${3:--1}" "${4:--1}" "${groups}"
fi
fi
}
# @FUNCTION: postgres_pkg_setup
# @REQUIRED
# @USAGE: postgres_pkg_setup
# @DESCRIPTION:
# Initialize environment variable(s) according to the best
# installed version of PostgreSQL that is also in POSTGRES_COMPAT. This
# is required if pkg_setup() is declared in the ebuild.
# Exports PG_SLOT, PG_CONFIG, and PKG_CONFIG_PATH.
postgres_pkg_setup() {
debug-print-function ${FUNCNAME} "${@}"
local compat_slot
local best_slot
for compat_slot in "${POSTGRES_COMPAT[@]}"; do
if use "postgres_targets_postgres${compat_slot/\./_}"; then
best_slot="${compat_slot}"
break
fi
done
if [[ -z "${best_slot}" ]]; then
local flags f
for f in "${POSTGRES_COMPAT[@]}"; do
flags+=" postgres${f/./_}"
done
eerror "POSTGRES_TARGETS must contain at least one of:"
eerror " ${flags}"
die "No suitable POSTGRES_TARGETS enabled."
fi
export PG_SLOT=${best_slot}
export PG_CONFIG=$(which pg_config${best_slot//./})
local pg_pkg_config_path="$(${PG_CONFIG} --libdir)/pkgconfig"
if [[ -n "${PKG_CONFIG_PATH}" ]]; then
export PKG_CONFIG_PATH="${pg_pkg_config_path}:${PKG_CONFIG_PATH}"
else
export PKG_CONFIG_PATH="${pg_pkg_config_path}"
fi
elog "PostgreSQL Target: ${best_slot}"
}
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