llvm-r1.eclass: Initial version

Bug: https://bugs.gentoo.org/923228
Bug: https://bugs.gentoo.org/880671
Closes: https://bugs.gentoo.org/821955
Closes: https://bugs.gentoo.org/919150
Signed-off-by: Michał Górny <mgorny@gentoo.org>

1 files changed, 151 insertions, 0 deletions

diff --git a/eclass/tests/llvm-r1.sh b/eclass/tests/llvm-r1.sh
new file mode 100755
index 000000000000..9958f5bba420
--- /dev/null
+++ b/eclass/tests/llvm-r1.sh
@@ -0,0 +1,151 @@
+#!/bin/bash
+# Copyright 2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+source tests-common.sh || exit
+
+EAPI=8
+
+test_globals() {
+	local compat=${1}
+	local expected_iuse=${2}
+	local expected_required_use=${3}
+	local expected_usedep=${4}
+	local x
+
+	tbegin "LLVM_COMPAT=( ${compat} )"
+
+	(
+		local fail=0
+		local LLVM_COMPAT=( ${compat} )
+
+		inherit llvm-r1
+
+		if [[ ${IUSE%% } != ${expected_iuse} ]]; then
+			eerror "          IUSE: ${IUSE%% }"
+			eerror "does not match: ${expected_iuse}"
+			fail=1
+		fi
+
+		if [[ ${REQUIRED_USE} != ${expected_required_use} ]]; then
+			eerror "  REQUIRED_USE: ${REQUIRED_USE}"
+			eerror "does not match: ${expected_required_use}"
+			fail=1
+		fi
+
+		if [[ ${LLVM_USEDEP} != ${expected_usedep} ]]; then
+			eerror "   LLVM_USEDEP: ${LLVM_USEDEP}"
+			eerror "does not match: ${expected_usedep}"
+			fail=1
+		fi
+
+		exit "${fail}"
+	)
+
+	tend "${?}"
+}
+
+test_gen_dep() {
+	local arg=${1}
+	local expected
+	read -r -d '' expected
+
+	tbegin "llvm_gen_dep ${arg}"
+	local value=$(llvm_gen_dep "${arg}")
+
+	if [[ ${value} != ${expected} ]]; then
+		eerror "python_get_usedep ${arg}"
+		eerror "gave:"
+		eerror "  ${value}"
+		eerror "expected:"
+		eerror "  ${expected}"
+	fi
+	tend ${?}
+}
+
+test_fix_clang_version() {
+	local var=${1}
+	local tool=${2}
+	local version=${3}
+	local expected=${4}
+
+	eval "${tool}() {
+		cat <<-EOF
+			clang version ${version}
+			Target: x86_64-pc-linux-gnu
+			Thread model: posix
+			InstalledDir: /usr/lib/llvm/17/bin
+			Configuration file: /etc/clang/x86_64-pc-linux-gnu-clang.cfg
+		EOF
+	}"
+
+	declare -g ${var}=${tool}
+	tbegin "llvm_fix_clang_version ${var}=${tool} for ${version}"
+	llvm_fix_clang_version "${var}"
+	if [[ ${!var} != ${expected} ]]; then
+		eerror "llvm_fix_clang_version ${var}"
+		eerror "    gave: ${!var}"
+		eerror "expected: ${expected}"
+	fi
+	tend ${?}
+}
+
+test_fix_tool_path() {
+	local var=${1}
+	local tool=${2}
+	local expected_subst=${3}
+	local expected=${tool}
+
+	tbegin "llvm_fix_tool_path ${1}=${2} (from llvm? ${expected_subst})"
+
+	local matches=( "${BROOT}"/usr/lib/llvm/*/bin/"${tool}" )
+	if [[ ${expected_subst} == 1 ]]; then
+		if [[ ! -x ${matches[0]} ]]; then
+			ewarn "- skipping, test requires ${tool}"
+			return
+		fi
+
+		expected=${matches[0]}
+		local -x PATH=${matches[0]%/*}
+	else
+		local -x PATH=
+	fi
+
+	declare -g ${var}=${tool}
+	llvm_fix_tool_path "${var}"
+	if [[ ${!var} != ${expected} ]]; then
+		eerror "llvm_fix_tool_path ${var}"
+		eerror "    gave: ${!var}"
+		eerror "expected: ${expected}"
+	fi
+	tend ${?}
+}
+
+test_globals '14 15 16 17 18' \
+	"+llvm_slot_17 llvm_slot_15 llvm_slot_16 llvm_slot_18" \
+	"^^ ( llvm_slot_15 llvm_slot_16 llvm_slot_17 llvm_slot_18 )" \
+	"llvm_slot_15(-)?,llvm_slot_16(-)?,llvm_slot_17(-)?,llvm_slot_18(-)?"
+test_globals '14 15 16' \
+	"+llvm_slot_16 llvm_slot_15" \
+	"^^ ( llvm_slot_15 llvm_slot_16 )" \
+	"llvm_slot_15(-)?,llvm_slot_16(-)?"
+test_globals '15 18' \
+	"+llvm_slot_15 llvm_slot_18" \
+	"^^ ( llvm_slot_15 llvm_slot_18 )" \
+	"llvm_slot_15(-)?,llvm_slot_18(-)?"
+test_globals '18' \
+	"+llvm_slot_18" \
+	"^^ ( llvm_slot_18 )" \
+	"llvm_slot_18(-)?"
+
+LLVM_COMPAT=( {14..18} )
+inherit llvm-r1
+
+test_gen_dep 'sys-devel/llvm:${LLVM_SLOT} sys-devel/clang:${LLVM_SLOT}' <<-EOF
+	llvm_slot_15? ( sys-devel/llvm:15 sys-devel/clang:15 )
+	llvm_slot_16? ( sys-devel/llvm:16 sys-devel/clang:16 )
+	llvm_slot_17? ( sys-devel/llvm:17 sys-devel/clang:17 )
+	llvm_slot_18? ( sys-devel/llvm:18 sys-devel/clang:18 )
+EOF
+
+texit