1 files changed, 163 insertions, 0 deletions
diff --git a/xmake/rules/csharp/generator/itemgroups.lua b/xmake/rules/csharp/generator/itemgroups.lua
new file mode 100644
index 000000000..2c0528665
--- /dev/null
+++ b/xmake/rules/csharp/generator/itemgroups.lua
@@ -0,0 +1,163 @@
+--!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      JassJam
+-- @file        itemgroups.lua
+--
+
+-- normalize path to relative and use forward slashes
+function _normalize_relative(fromdir, targetpath)
+    local relpath = path.relative(targetpath, fromdir) or targetpath
+    return path.unix(relpath)
+end
+
+-- collect .cs source files as relative paths to csprojdir
+function _collect_cs_sourcefiles(context)
+    local csfiles = {}
+    for _, sourcefile in ipairs(context.target:sourcefiles()) do
+        if path.extension(sourcefile):lower() == ".cs" then
+            local sourceabs = path.is_absolute(sourcefile) and sourcefile or path.absolute(sourcefile, os.projectdir())
+            table.insert(csfiles, _normalize_relative(context.csprojdir, sourceabs))
+        end
+    end
+    table.sort(csfiles)
+    return table.unique(csfiles)
+end
+
+-- collect ProjectReference paths from dependency targets
+function _collect_project_references(context)
+    local references = {}
+    for _, dep in ipairs(context.target:orderdeps()) do
+        local depcsproj = dep:data("csharp.csproj")
+        if depcsproj then
+            table.insert(references, _normalize_relative(context.csprojdir, depcsproj))
+        end
+    end
+    table.sort(references)
+    return table.unique(references)
+end
+
+-- extract nuget package name and version from package require string
+function _get_nuget_info(pkg)
+    local requirestr = pkg:requirestr() or ""
+    local splitinfo = requirestr:trim():split("%s+")
+    if #splitinfo == 0 then
+        return nil
+    end
+
+    local pkgname = splitinfo[1]
+    if pkgname:find("::", 1, true) then
+        pkgname = pkgname:split("::", {plain = true})
+        pkgname = pkgname[#pkgname]
+    end
+    local pkgname_raw = pkgname:match("(.-)%[.*%]$")
+    if pkgname_raw and #pkgname_raw > 0 then
+        pkgname = pkgname_raw
+    end
+    if not pkgname or #pkgname == 0 then
+        return nil
+    end
+
+    local version
+    local versionobj = pkg:version()
+    if versionobj then
+        version = tostring(versionobj)
+    end
+    if not version and #splitinfo > 1 then
+        local require_version = table.concat(table.slice(splitinfo, 2), " ")
+        if require_version ~= "latest" then
+            version = require_version
+        end
+    end
+    return pkgname, version
+end
+
+-- collect PackageReference entries from nuget packages
+function _collect_nuget_references(context)
+    local versions = {}
+    for _, pkg in ipairs(context.target:orderpkgs()) do
+        local namespace = pkg:namespace()
+        local requirestr = pkg:requirestr() or ""
+        if namespace == "nuget" or requirestr:startswith("nuget::") then
+            local pkgname, version = _get_nuget_info(pkg)
+            if pkgname then
+                if version or versions[pkgname] == nil then
+                    versions[pkgname] = version or false
+                end
+            end
+        end
+    end
+
+    local references = {}
+    for pkgname, version in table.orderpairs(versions) do
+        table.insert(references, {name = pkgname, version = version or nil})
+    end
+    table.sort(references, function (a, b) return a.name < b.name end)
+    return references
+end
+
+-- register all item group entries (Compile, ProjectReference, PackageReference)
+function main()
+    local entries = {}
+    local function register(entry)
+        table.insert(entries, entry)
+    end
+
+    register({
+        kind = "item",
+        group = "compile",
+        xml = "Compile",
+        resolve_items = function (context)
+            local items = {}
+            for _, sourcefile in ipairs(_collect_cs_sourcefiles(context)) do
+                table.insert(items, {attrs = {Include = sourcefile}})
+            end
+            return items
+        end
+    })
+
+    register({
+        kind = "item",
+        group = "project_reference",
+        xml = "ProjectReference",
+        resolve_items = function (context)
+            local items = {}
+            for _, reffile in ipairs(_collect_project_references(context)) do
+                table.insert(items, {attrs = {Include = reffile}})
+            end
+            return items
+        end
+    })
+
+    register({
+        kind = "item",
+        group = "package_reference",
+        xml = "PackageReference",
+        resolve_items = function (context)
+            local items = {}
+            for _, pkginfo in ipairs(_collect_nuget_references(context)) do
+                local attrs = {Include = pkginfo.name}
+                if pkginfo.version then
+                    attrs.Version = pkginfo.version
+                end
+                table.insert(items, {attrs = attrs})
+            end
+            return items
+        end
+    })
+
+    return entries
+end