fix local function style and extract the target check function

1 files changed, 75 insertions, 0 deletions

diff --git a/xmake/modules/private/tools/rust/check_target.lua b/xmake/modules/private/tools/rust/check_target.lua
new file mode 100644
index 000000000..1c213306e
--- /dev/null
+++ b/xmake/modules/private/tools/rust/check_target.lua
@@ -0,0 +1,75 @@
+--!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, TBOOX Open Source Group.
+--
+-- @author      w568w
+-- @file        check_target.lua
+--
+
+-- imports
+import("lib.detect.find_tool")
+
+-- get rustc supported targets
+--
+-- @return          the supported target list. If rustc not found, return nil
+function _get_rustc_supported_target()
+    local rustc = find_tool("rustc")
+    if not rustc then
+        return nil
+    end
+    local output = os.iorunv(rustc.program, {"--print", "target-list"})
+    return output:split('\n')
+end
+
+-- check whether the target is supported by rustc
+--
+-- @param arch      the target name, e.g. x86_64-unknown-linux-gnu
+-- @param precise   whether to check the target precisely (i.e. check by rustc), otherwise only by syntax
+--
+-- @return          true if arch != nil and the target is supported by rustc, otherwise false
+function main(arch, precise)
+    print("arch: " .. arch)
+
+    if not arch then
+        return false
+    end
+
+    -- 1: check by syntax
+    local result = false
+    local archs = arch:split("%-")
+    if #archs >= 2 then
+        result = true
+    end
+
+    -- 2: check by rustc
+    if not precise then
+        return result
+    end
+    result = false
+    local rustc_supported_target = _get_rustc_supported_target()
+    if rustc_supported_target then
+        for _, v in ipairs(rustc_supported_target) do
+            if v == arch then
+                result = true
+                break
+            end
+        end
+        if not result then
+            utils.warning("The arch \"%s\" is NOT supported by rustc, will be IGNORED and may cause compilation errors. please check it again", arch)
+        end
+    end
+
+    return result
+end