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# Copyright 2021-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# @ECLASS: gradle.eclass
# @MAINTAINER:
# Gentoo Java Project <java@gentoo.org>
# @AUTHOR:
# Florian Schmaus <flow@gentoo.org>
# @BLURB: common ebuild functions for gradle-based packages.
# @DESCRIPTION:
# This eclass provides support for the gradle build system. There
# are currently two approaches to using gradle in ebuilds. You can either
# depend on a gradle system-wide installation from a gradle ebuild, typically
# dev-java/gradle-bin, or, bundle gradle with the ebuild.
#
# To use a system-wide gradle installation, set EGRADLE_MIN and
# EGRADLE_MAX_EXCLUSIVE and declare a BDEPEND on the gradle package.
# @CODE
# inherit gradle
# EGRADLE_MIN=7.3
# EGRADLE_MAX_EXCLUSIVE=8
#
# BDEPEND="|| (dev-java/gradle-bin:7.3 dev-java/gradle-bin:7.4)
# @CODE
#
# To use a bundled gradle version, set EGRADLE_BUNDLED_VER and add
# $(gradle_src_uri) to SRC_URI.
# @CODE
# inherit gradle
# EGRADLE_BUNDLED_VER=7.6
# SRC_URI="
# ...
# $(gradle_src_uri)
# "
# @CODE
#
# Afterwards, use egradle to invoke gradle.
# @CODE
# src_compile() {
# egradle build
# }
# @CODE
case ${EAPI} in
7|8) ;;
*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac
if [[ -z ${_GRADLE_ECLASS} ]] ; then
_GRADLE_ECLASS=1
inherit edo
# @ECLASS_VARIABLE: EGRADLE_MIN
# @DEFAULT_UNSET
# @DESCRIPTION:
# Minimum required gradle version.
# @ECLASS_VARIABLE: EGRADLE_MAX_EXCLUSIVE
# @DEFAULT_UNSET
# @DESCRIPTION:
# First gradle version that is not supported.
# @ECLASS_VARIABLE: EGRADLE_EXACT_VER
# @DEFAULT_UNSET
# @DESCRIPTION:
# The exact required gradle version.
# @ECLASS_VARIABLE: EGRADLE_BUNDLED_VER
# @DEFAULT_UNSET
# @DESCRIPTION:
# The gradle version that will be bundled with this package.
# @ECLASS_VARIABLE: EGRADLE_PARALLEL
# @DESCRIPTION:
# Set to the 'true', the default, to invoke gradle with --parallel. Set
# to 'false' to disable parallel gradle builds.
: "${EGRADLE_PARALLEL=true}"
# @ECLASS_VARIABLE: EGRADLE_USER_HOME
# @DESCRIPTION:
# Directroy used as the user's home directory by gradle. Defaults to
# ${T}/gradle_user_home
: "${EGRADLE_USER_HOME="${T}/gradle_user_home"}"
# @ECLASS_VARIABLE: EGRADLE_OVERWRITE
# @USER_VARIABLE
# @DEFAULT_UNSET
# @DESCRIPTION:
# User-specified overwrite of the used gradle binary.
# @FUNCTION: gradle-set_EGRADLE
# @DESCRIPTION:
# Set the EGRADLE environment variable.
gradle-set_EGRADLE() {
[[ -n ${EGRADLE} ]] && return
if [[ -n ${EGRADLE_OVERWRITE} ]]; then
EGRADLE="${EGRADLE_OVERWRITE}"
return
fi
if [[ -n ${EGRADLE_BUNDLED_VER} ]]; then
EGRADLE="${WORKDIR}/gradle-${EGRADLE_BUNDLED_VER}/bin/gradle"
return
fi
local candidates candidate selected selected_ver
candidates=$(compgen -c gradle-)
for candidate in ${candidates}; do
if [[ ! ${candidate} =~ gradle(-bin)?-([.0-9]+) ]]; then
continue
fi
local ver
if (( ${#BASH_REMATCH[@]} == 3 )); then
ver="${BASH_REMATCH[2]}"
else
ver="${BASH_REMATCH[1]}"
fi
if [[ -n ${EGRADLE_EXACT_VER} ]]; then
ver_test "${ver}" -ne "${EGRADLE_EXACT_VER}" && continue
selected="${candidate}"
break
fi
if [[ -n ${EGRADLE_MIN} ]] \
&& ver_test "${ver}" -lt "${EGRADLE_MIN}"; then
# Candidate does not satisfy EGRADLE_MIN condition.
continue
fi
if [[ -n ${EGRADLE_MAX_EXCLUSIVE} ]] \
&& ver_test "${ver}" -ge "${EGRADLE_MAX_EXCLUSIVE}"; then
# Candidate does not satisfy EGRADLE_MAX_EXCLUSIVE condition.
continue
fi
if [[ -n ${selected_ver} ]] \
&& ver_test "${selected_ver}" -gt "${ver}"; then
# Candidate is older than the currently selected candidate.
continue
fi
selected="${candidate}"
selected_ver="${ver}"
done
if [[ -z ${selected} ]]; then
die "Could not find (suitable) gradle installation in PATH"
fi
EGRADLE="${selected}"
}
# @FUNCTION: gradle-src_uri
# @DESCRIPTION:
# Generate SRC_URI data from EGRADLE_BUNDLED_VER.
gradle-src_uri() {
if [[ -z ${EGRADLE_BUNDLED_VER} ]]; then
die "Must set EGRADLE_BUNDLED_VER when calling gradle-src_uri"
fi
echo "https://services.gradle.org/distributions/gradle-${EGRADLE_BUNDLED_VER}-bin.zip"
}
# @FUNCTION: egradle
# @USAGE: [gradle-args]
# @DESCRIPTION:
# Invoke gradle with the optionally provided arguments.
egradle() {
gradle-set_EGRADLE
local gradle_args=(
--console=plain
--info
--stacktrace
--no-daemon
--offline
--no-build-cache
--gradle-user-home "${EGRADLE_USER_HOME}"
--project-cache-dir "${T}/gradle_project_cache"
)
if ${EGRADLE_PARALLEL}; then
gradle_args+=( --parallel )
fi
local -x JAVA_TOOL_OPTIONS="${JAVA_TOOL_OPTIONS} -Duser.home=\"${T}\""
# TERM needed, otherwise gradle may fail on terms it does not know about
TERM=xterm \
edo \
"${EGRADLE}" "${gradle_args[@]}" "${@}"
}
fi
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