--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
--     http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @author      ruki
-- @file        find_clang_format.lua
--

-- imports
import("lib.detect.find_program")
import("lib.detect.find_programver")

-- find clang-format
--
-- @param opt   the argument options, e.g. {version = true}
--
-- @return      program, version
--
-- @code
--
-- local clang_format = find_clang_format()
-- local clang_format, version = find_clang_format({program = "clang-format", version = true})
--
-- @endcode
--
function main(opt)
    opt = opt or {}
    local program = find_program(opt.program or "clang-format", opt)
    if not program and is_host("macosx") then
        local llvm = try {function () return os.iorunv("brew", {"--prefix", "llvm"}) end}
        if llvm then
            opt.paths = table.wrap(opt.paths)
            opt.force = true
            table.insert(opt.paths, path.join(llvm:trim(), "bin"))
            program = find_program(opt.program or "clang-format", opt)
        end
    end
    local version = nil
    if program and opt and opt.version then
        version = find_programver(program, opt)
    end
    return program, version
end