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# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: rebar.eclass
# @MAINTAINER:
# maintainer-needed@gentoo.org
# @AUTHOR:
# Amadeusz Żołnowski <aidecoe@gentoo.org>
# @SUPPORTED_EAPIS: 7 8
# @PROVIDES: rebar-utils
# @BLURB: Build Erlang/OTP projects using dev-util/rebar.
# @DESCRIPTION:
# An eclass providing functions to build Erlang/OTP projects using
# dev-util/rebar.
#
# rebar is a tool which tries to resolve dependencies itself which is by
# cloning remote git repositories. Dependent projects are usually expected to
# be in sub-directory 'deps' rather than looking at system Erlang lib
# directory. Projects relying on rebar usually don't have 'install' make
# targets. The eclass workarounds some of these problems. It handles
# installation in a generic way for Erlang/OTP structured projects.
case ${EAPI} in
7|8) ;;
*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac
if [[ -z ${_REBAR_ECLASS} ]]; then
_REBAR_ECLASS=1
inherit rebar-utils
RDEPEND="dev-lang/erlang:="
DEPEND="${RDEPEND}"
BDEPEND="
dev-util/rebar:0
>=sys-apps/gawk-4.1
"
# @FUNCTION: _rebar_find_dep
# @INTERNAL
# @USAGE: <project_name>
# @RETURN: 0 success, 1 dependency not found, 2 multiple versions found
# @DESCRIPTION:
# Find a Erlang package/project by name in Erlang lib directory. Project
# directory is usually suffixed with version. It is matched to '<project_name>'
# or '<project_name>-*'.
_rebar_find_dep() {
local pn="${1}"
local p
local result
pushd "${EPREFIX}$(get_erl_libs)" >/dev/null || return 1
for p in ${pn} ${pn}-*; do
if [[ -d ${p} ]]; then
# Ensure there's at most one matching.
[[ ${result} ]] && return 2
result="${p}"
fi
done
popd >/dev/null || die
[[ ${result} ]] || return 1
echo "${result}"
}
# @FUNCTION: erebar
# @USAGE: <targets>
# @DESCRIPTION:
# Run rebar with verbose flag. Die on failure.
erebar() {
debug-print-function ${FUNCNAME} "${@}"
(( $# > 0 )) || die "erebar: at least one target is required"
local -x ERL_LIBS="${EPREFIX}$(get_erl_libs)"
[[ ${1} == eunit ]] && local -x ERL_LIBS="."
rebar -v skip_deps=true "$@" || die -n "rebar $@ failed"
}
# @FUNCTION: rebar_src_prepare
# @DESCRIPTION:
# Prevent rebar from fetching and compiling dependencies. Set version in
# project description file if it's not set.
#
# Existence of rebar.config is optional, but file description file must exist
# at 'src/${PN}.app.src'.
rebar_src_prepare() {
debug-print-function ${FUNCNAME} "${@}"
default
rebar_set_vsn
if [[ -f rebar.config ]]; then
rebar_disable_coverage
rebar_remove_deps
fi
}
# @FUNCTION: rebar_src_configure
# @DESCRIPTION:
# Configure with ERL_LIBS set.
rebar_src_configure() {
debug-print-function ${FUNCNAME} "${@}"
local -x ERL_LIBS="${EPREFIX}$(get_erl_libs)"
default
}
# @FUNCTION: rebar_src_compile
# @DESCRIPTION:
# Compile project with rebar.
rebar_src_compile() {
debug-print-function ${FUNCNAME} "${@}"
erebar compile
}
# @FUNCTION: rebar_src_test
# @DESCRIPTION:
# Run unit tests.
rebar_src_test() {
debug-print-function ${FUNCNAME} "${@}"
erebar eunit
}
# @FUNCTION: rebar_src_install
# @DESCRIPTION:
# Install BEAM files, include headers, executables and native libraries.
# Install standard docs like README or defined in DOCS variable.
#
# Function expects that project conforms to Erlang/OTP structure.
rebar_src_install() {
debug-print-function ${FUNCNAME} "${@}"
local bin
local dest="$(get_erl_libs)/${P}"
insinto "${dest}"
doins -r ebin
[[ -d include ]] && doins -r include
[[ -d bin ]] && for bin in bin/*; do dobin "$bin"; done
if [[ -d priv ]]; then
cp -pR priv "${ED}${dest}/" || die "failed to install priv/"
fi
einstalldocs
}
fi
EXPORT_FUNCTIONS src_prepare src_compile src_test src_install
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