Merged from upstream/master

1 files changed, 118 insertions, 0 deletions

diff --git a/xmake/rules/c++/modules/build_modules/module_parser.lua b/xmake/rules/c++/modules/build_modules/module_parser.lua
new file mode 100644
index 000000000..b97b7e1d0
--- /dev/null
+++ b/xmake/rules/c++/modules/build_modules/module_parser.lua
@@ -0,0 +1,118 @@
+--!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      ruki
+-- @file        module_parser.lua
+--
+
+-- imports
+import("core.project.depend")
+
+-- get depend file of module source file
+function _get_dependfile_of_modulesource(target, sourcefile)
+    return target:dependfile(sourcefile)
+end
+
+-- get depend file of module object file, compiler will rewrite it
+function _get_dependfile_of_moduleobject(target, sourcefile)
+    local objectfile = target:objectfile(sourcefile)
+    return target:dependfile(objectfile)
+end
+
+-- generate module deps for the given file
+function _generate_moduledeps(target, sourcefile, opt)
+    local dependfile = _get_dependfile_of_modulesource(target, sourcefile)
+    depend.on_changed(function ()
+
+        -- trace
+        vprint("generating.moduledeps %s", sourcefile)
+
+        -- generating deps
+        local module_name
+        local module_deps
+        local sourcecode = io.readfile(sourcefile)
+        sourcecode = sourcecode:gsub("//.-\n", "\n")
+        sourcecode = sourcecode:gsub("/%*.-%*/", "")
+        for _, line in ipairs(sourcecode:split("\n", {plain = true})) do
+            if not module_name then
+                module_name = line:match("export%s+module%s+(.+)%s*;")
+            end
+            local module_depname = line:match("import%s+(.+)%s*;")
+            if module_depname then
+                -- partition? import :xxx;
+                if module_depname:startswith(":") then
+                    module_depname = module_name .. module_depname
+                end
+                module_deps = module_deps or {}
+                table.insert(module_deps, module_depname)
+            end
+        end
+
+        -- save depend data
+        if module_name then
+            local dependinfo = {moduleinfo = {name = module_name, deps = module_deps, file = sourcefile}}
+            return dependinfo
+        end
+
+    end, {dependfile = dependfile, files = {sourcefile}})
+end
+
+-- generate module deps
+function generate(target, sourcebatch, opt)
+    for _, sourcefile in ipairs(sourcebatch.sourcefiles) do
+        _generate_moduledeps(target, sourcefile, opt)
+    end
+end
+
+-- load module deps
+function load(target, sourcebatch, opt)
+
+    -- do generate first
+    generate(target, sourcebatch, opt)
+
+    -- load deps
+    local moduledeps
+    for _, sourcefile in ipairs(sourcebatch.sourcefiles) do
+        local dependfile = _get_dependfile_of_modulesource(target, sourcefile)
+        if os.isfile(dependfile) then
+            local data = io.load(dependfile)
+            if data then
+                local moduleinfo = data.moduleinfo
+                moduledeps = moduledeps or {}
+                moduledeps[moduleinfo.name] = moduleinfo
+            end
+        end
+    end
+    return moduledeps
+end
+
+-- build module deps
+function build(moduledeps)
+    local moduledeps_files = {}
+    for _, moduledep in pairs(moduledeps) do
+        if moduledep.deps then
+            for _, depname in ipairs(moduledep.deps) do
+                local dep = moduledeps[depname]
+                if dep then
+                    dep.parents = dep.parents or {}
+                    table.insert(dep.parents, moduledep)
+                end
+            end
+        end
+        moduledeps_files[moduledep.file] = moduledep
+    end
+    return moduledeps_files
+end