build2.eclass: new eclass

Signed-off-by: Anna (cybertailor) Vyalkova <cyber+gentoo@sysrq.in>

eclass/build2.eclass

@@ -0,0 +1,150 @@
+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: build2.eclass
+# @MAINTAINER:
+# Anna Vyalkova <cyber+gentoo@sysrq.in>
+# @AUTHOR:
+# Anna Vyalkova <cyber+gentoo@sysrq.in>
+# @SUPPORTED_EAPIS: 8
+# @BLURB: eclass for packages using build2
+# @DESCRIPTION:
+# Utility eclass providing wrapper functions for the build2 build system along
+# with default phase functions.
+
+case ${EAPI:-0} in
+	8) ;;
+	*) die "${ECLASS}: EAPI ${EAPI:-0} unsupported."
+esac
+
+if [[ ! ${_BUILD2_ECLASS} ]]; then
+
+inherit edo multiprocessing toolchain-funcs
+
+fi
+
+EXPORT_FUNCTIONS src_configure src_compile src_test src_install
+
+if [[ ! ${_BUILD2_ECLASS} ]]; then
+
+# @ECLASS_VARIABLE: BUILD2_VERBOSITY
+# @USER_VARIABLE
+# @DESCRIPTION:
+# Determines what kind of output to show when executing commands.  All possible
+# options are listed in b(1).
+: ${BUILD2_VERBOSITY:=2}
+
+BDEPEND="dev-util/build2"
+
+# @FUNCTION: build2_src_configure
+# @DESCRIPTION:
+# Set build2 preferences to match user settings.  Configure toolchain, build
+# flags and installation prefix.
+build2_src_configure() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	[[ -z ${mybargs} ]] && declare -a mybargs=()
+	local mybargstype=$(declare -p mybargs 2>&-)
+	if [[ "${mybargstype}" != "declare -a mybargs="* ]]; then
+		die "mybargs must be declared as array"
+	fi
+
+	local bargs=(
+		config.cxx="$(tc-getCXX)"
+		config.cxx.coptions="${CXXFLAGS}"
+		config.cxx.loptions="${LDFLAGS}"
+		config.c="$(tc-getCC)"
+		config.cc.coptions="${CFLAGS}"
+		config.cc.loptions="${LDFLAGS}"
+		config.bin.ar="$(tc-getAR)"
+		config.bin.ranlib="$(tc-getRANLIB)"
+		config.bin.lib=shared
+		config.install.root="${EPREFIX}"/usr
+		config.install.lib="${EPREFIX}"/usr/$(get_libdir)
+		config.install.doc="${EPREFIX}"/usr/share/doc/${PF}
+		"${mybargs[@]}"
+		--jobs $(makeopts_jobs)
+		--verbose "${BUILD2_VERBOSITY}"
+	)
+
+	edo b configure "${bargs[@]}"
+}
+
+# @FUNCTION: build2_src_compile
+# @USAGE: [<b args>...]
+# @DESCRIPTION:
+# General function for compiling with build2.  Tests are built conditionally.
+build2_src_compile() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	local build_tests=no
+	local bargs=(
+		"${@}"
+		--jobs $(makeopts_jobs)
+		--verbose "${BUILD2_VERBOSITY}"
+	)
+
+	edo b update-for-install "${bargs[@]}"
+	has test ${FEATURES} && edo b update-for-test "${bargs[@]}"
+}
+
+# @FUNCTION: build2_src_test
+# @USAGE: [<b args>...]
+# @DESCRIPTION:
+# Test the package using "b test".
+build2_src_test() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	local bargs=(
+		"${@}"
+		--jobs $(makeopts_jobs)
+		--verbose "${BUILD2_VERBOSITY}"
+	)
+
+	edo b test "${bargs[@]}"
+}
+
+# @FUNCTION: build2_src_install
+# @USAGE: [<b args>...]
+# @DESCRIPTION:
+# Install the package using "b install".
+build2_src_install() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	local bargs=(
+		config.install.chroot="${D}"
+		"${@}"
+		--jobs $(makeopts_jobs)
+		--verbose "${BUILD2_VERBOSITY}"
+	)
+
+	edo b install "${bargs[@]}"
+	einstalldocs
+}
+
+# @FUNCTION: build2_pkg_die
+# @INTERNAL
+# @DESCRIPTION:
+# EBUILD_DEATH_HOOK function to display a warning if ccache is enabled.
+
+if ! has build2_pkg_die ${EBUILD_DEATH_HOOKS}; then
+	EBUILD_DEATH_HOOKS="${EBUILD_DEATH_HOOKS} build2_pkg_die"
+fi
+
+build2_pkg_die() {
+	if [[ "${EBUILD_PHASE}" != "compile" ]]; then
+		return
+	fi
+
+	if has ccache ${FEATURES}; then
+		# build2 doesn't support ccache:
+		# https://github.com/build2/build2/issues/86#issuecomment-647401742
+		ewarn
+		ewarn "!!! You have enabled ccache. Please try disabling ccache"
+		ewarn "!!! before reporting a bug."
+		ewarn
+	fi
+}
+
+_BUILD2_ECLASS=1
+fi