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# Custom CMake module to find the Go toolchain
#
# Copyright (c) 2024 Netdata Inc
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
# This is a relatively orthodox CMake Find Module. It can be used by
# simply including it and then invoking `find_package(Go)`.
#
# Version handling is done by CMake itself via the
# find_package_handle_standard_args() function, so `find_package(Go 1.21)`
# will also work correctly.
if(GO_FOUND)
return()
endif()
# Two passes are needed here so that we prefer a copy in `/usr/local/go/bin` over a system copy.
find_program(GO_EXECUTABLE go PATHS /usr/local/go/bin DOC "Go toolchain" NO_DEFAULT_PATH)
find_program(GO_EXECUTABLE go DOC "Go toolchain")
if (GO_EXECUTABLE)
execute_process(
COMMAND ${GO_EXECUTABLE} version
OUTPUT_VARIABLE GO_VERSION_STRING
RESULT_VARIABLE RESULT
)
if (RESULT EQUAL 0)
string(REGEX MATCH "go([0-9]+\\.[0-9]+(\\.[0-9]+)?)" GO_VERSION_STRING "${GO_VERSION_STRING}")
string(REGEX MATCH "([0-9]+\\.[0-9]+(\\.[0-9]+)?)" GO_VERSION_STRING "${GO_VERSION_STRING}")
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
Go
REQUIRED_VARS GO_EXECUTABLE
VERSION_VAR GO_VERSION_STRING
)
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