add license checking

1 files changed, 75 insertions, 0 deletions

diff --git a/xmake/modules/core/base/license.lua b/xmake/modules/core/base/license.lua
new file mode 100644
index 000000000..ca1c80eef
--- /dev/null
+++ b/xmake/modules/core/base/license.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) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        license.lua
+--
+
+-- imports
+import("core.base.object")
+import("core.base.hashset")
+
+-- get licenses
+function _licenses()
+    local licenses = _g.licenses
+    if not licenses then
+        licenses = hashset.from({"Apache-2.0",
+                                 "MIT",
+                                 "Public Domain",
+                                 "LGPL-2.0", "LGPL-2.1", "LGPL-3.0",
+                                 "GPL-2.0", "GPL-3.0", "GPL-3.0",
+                                 "BSD-2-Clause", "BSD-3-Clause"})
+        _g.licenses = licenses
+    end
+    return licenses
+end
+
+-- get all licenses list
+function list()
+    return _licenses():to_array()
+end
+
+-- normalize license
+function normalize(license)
+    -- TODO parse and convert license strings in other formats
+    return license
+end
+
+-- check if the license is compatible
+-- @see https://github.com/xmake-io/xmake/issues/1016
+--
+function compatible(target_license, library_license, opt)
+    opt = opt or {}
+    library_license = normalize(library_license)
+    if library_license then
+        target_license = normalize(target_license)
+        if library_license:startswith("GPL-") then
+            return target_license and target_license:startswith("GPL-")
+        elseif library_license:startswith("LGPL-") then
+            if target_license and target_license:startswith("LGPL-") then
+                return true
+            elseif opt.library_kind and opt.library_kind == "shared" then
+                -- we can only use shared library with LGPL-x
+                return true
+            else
+                return false, string.format("we can use shared libraries with %s or use set_license()/set_policy() to modify/disable license", library_license)
+            end
+        else
+            -- TODO maybe we need handle more licenses
+        end
+    end
+    return true
+end