impl has_flags and rename detect.xxx to detect.xxxs

1 files changed, 101 insertions, 0 deletions

diff --git a/xmake/modules/lib/detect/has_flags.lua b/xmake/modules/lib/detect/has_flags.lua
new file mode 100644
index 000000000..6aad9b7a8
--- /dev/null
+++ b/xmake/modules/lib/detect/has_flags.lua
@@ -0,0 +1,101 @@
+--!The Make-like Build Utility based on Lua
+--
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements.  See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership.  The ASF licenses this file
+-- to you 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 - 2017, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        has_flags.lua
+--
+
+-- imports
+import("lib.detect.find_tool")
+
+-- has this flag?
+function _has_flag(name, flag, opt)
+
+    -- find tool program and version first
+    opt.version = true
+    local tool = find_tool(name, opt)
+    if not tool then
+        return false
+    end
+
+    -- init program and version
+    opt.program = tool.program
+    opt.version = tool.version
+
+    -- init cache and key
+    local key     = opt.program .. "_" .. (opt.version or "") .. "_" .. flag
+    local results = _g._RESULTS or {}
+    
+    -- get result from the cache first
+    local result = results[key]
+    if result ~= nil then
+        return result
+    end
+
+    -- "detect.tools.find_xxx" exists?
+    local result = nil
+    if os.isfile(path.join(os.programdir(), "modules", "detect", "flags", tool.name .. ".lua")) then
+        local has_flag_for_tool = import("detect.flags." .. tool.name)
+        if has_flag_for_tool then
+            result = has_flag_for_tool(flag, opt)
+        end
+    end
+
+    -- attempt to check it directly
+    if result == nil then
+        result = try { function () os.runv(opt.program, {flag}); return true end }
+    end
+
+    -- save result to cache
+    results[key] = ifelse(result, result, false)
+    _g._RESULTS = results
+
+    -- ok?
+    return result
+end
+
+-- has the given flags for the current tool?
+--
+-- @param name      the tool name
+-- @param flags     the flags
+-- @param opt       the argument options, .e.g {program = ""}
+--
+-- @return          true or false
+--
+-- @code
+-- local ok = has_flags("clang", "-g")
+-- local ok = has_flags("clang", {"-g", "-O0"}, {program = "xcrun -sdk macosx clang"})
+-- @endcode
+--
+function main(name, flags, opt)
+
+    -- init options
+    opt = opt or {}
+
+    -- has all flags?
+    for _, flag in ipairs(flags) do
+        if not _has_flag(name, flag, opt) then
+            return false
+        end
+    end
+
+    -- ok
+    return true
+end