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# Copyright 1999-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: rebar-utils.eclass
# @MAINTAINER:
# Florian Schmaus <flow@gentoo.org>
# @AUTHOR:
# Amadeusz Żołnowski <aidecoe@gentoo.org>
# @SUPPORTED_EAPIS: 7 8
# @BLURB: Auxiliary functions for using dev-util/rebar.
# @DESCRIPTION:
# This eclass provides a set of axiliary functions commonly needed
# when building Erlang/OTP packages with rebar.
case ${EAPI} in
7|8) ;;
*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac
if [[ -z ${_REBAR_UTILS_ECLASS} ]]; then
_REBAR_UTILS_ECLASS=1
# @ECLASS_VARIABLE: REBAR_APP_SRC
# @DESCRIPTION:
# Relative path to .app.src description file. Defaults to
# 'src/${PN}.app.src'.
: "${REBAR_APP_SRC:=src/${PN}.app.src}"
# @FUNCTION: get_erl_libs
# @RETURN: the path to Erlang lib directory
# @DESCRIPTION:
# Get the full path without EPREFIX to Erlang lib directory.
get_erl_libs() {
echo "/usr/$(get_libdir)/erlang/lib"
}
# @FUNCTION: _rebar_find_dep
# @INTERNAL
# @USAGE: <project_name>
# @RETURN: 0 success, 1 dependency not found, 2 multiple versions found
# @DESCRIPTION:
# Find a Erlang package/project by name in Erlang lib directory. Project
# directory is usually suffixed with version. It is matched to '<project_name>'
# or '<project_name>-*'.
_rebar_find_dep() {
local pn="${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: rebar_disable_coverage
# @USAGE: [<rebar_config>]
# @DESCRIPTION:
# Disable coverage in rebar.config. This is a workaround for failing coverage.
# Coverage is not relevant in this context, so there's no harm to disable it,
# although the issue should be fixed.
rebar_disable_coverage() {
debug-print-function ${FUNCNAME} "${@}"
local rebar_config="${1:-rebar.config}"
sed -e 's/{cover_enabled, true}/{cover_enabled, false}/' \
-i "${rebar_config}" \
|| die "failed to disable coverage in ${rebar_config}"
}
# @FUNCTION: rebar_fix_include_path
# @USAGE: <project_name> [<rebar_config>]
# @DESCRIPTION:
# Fix path in rebar.config to 'include' directory of dependent project/package,
# so it points to installation in system Erlang lib rather than relative 'deps'
# directory.
#
# <rebar_config> is optional. Default is 'rebar.config'.
#
# The function dies on failure.
rebar_fix_include_path() {
debug-print-function ${FUNCNAME} "${@}"
local pn="${1}"
local rebar_config="${2:-rebar.config}"
local erl_libs="${EPREFIX}$(get_erl_libs)"
local p
p="$(_rebar_find_dep "${pn}")" \
|| die "failed to unambiguously resolve dependency of '${pn}'"
gawk -i inplace \
-v erl_libs="${erl_libs}" -v pn="${pn}" -v p="${p}" '
/^{[[:space:]]*erl_opts[[:space:]]*,/, /}[[:space:]]*\.$/ {
pattern = "\"(./)?deps/" pn "/include\"";
if (match($0, "{i,[[:space:]]*" pattern "[[:space:]]*}")) {
sub(pattern, "\"" erl_libs "/" p "/include\"");
}
print $0;
next;
}
1
' "${rebar_config}" || die "failed to fix include paths in ${rebar_config} for '${pn}'"
}
# @FUNCTION: rebar_remove_deps
# @USAGE: [<rebar_config>]
# @DESCRIPTION:
# Remove dependencies list from rebar.config and deceive build rules that any
# dependencies are already fetched and built. Otherwise rebar tries to fetch
# dependencies and compile them.
#
# <rebar_config> is optional. Default is 'rebar.config'.
#
# The function dies on failure.
rebar_remove_deps() {
debug-print-function ${FUNCNAME} "${@}"
local rebar_config="${1:-rebar.config}"
mkdir -p "${S}/deps" && :>"${S}/deps/.got" && :>"${S}/deps/.built" || die
gawk -i inplace '
/^{[[:space:]]*deps[[:space:]]*,/, /}[[:space:]]*\.$/ {
if ($0 ~ /}[[:space:]]*\.$/) {
print "{deps, []}.";
}
next;
}
1
' "${rebar_config}" || die "failed to remove deps from ${rebar_config}"
}
# @FUNCTION: rebar_set_vsn
# @USAGE: [<version>]
# @DESCRIPTION:
# Set version in project description file if it's not set.
#
# <version> is optional. Default is PV stripped from version suffix.
#
# The function dies on failure.
rebar_set_vsn() {
debug-print-function ${FUNCNAME} "${@}"
local version="${1:-${PV%_*}}"
sed -e "s/vsn, git/vsn, \"${version}\"/" \
-i "${S}/${REBAR_APP_SRC}" \
|| die "failed to set version in src/${PN}.app.src"
}
fi
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