From 9409a5d109e471ed794c7e4d2bcd62377c3a4968 Mon Sep 17 00:00:00 2001
From: SSE4 <tomskside@gmail.com>
Date: Fri, 19 Feb 2021 16:41:48 +0700
Subject: [PATCH] - add tools.create_cmake_module_alias_targets

Signed-off-by: SSE4 <tomskside@gmail.com>
---
 conans/client/tools/__init__.py               |  2 +
 conans/client/tools/cmake.py                  | 11 ++++
 .../cmake_find_package_multi_test.py          | 61 +++++++++++++++++++
 conans/tools.py                               |  1 +
 4 files changed, 75 insertions(+)
 create mode 100644 conans/client/tools/cmake.py

diff --git a/conans/client/tools/__init__.py b/conans/client/tools/__init__.py
index f1572b1acaf..1cbbf589a41 100644
--- a/conans/client/tools/__init__.py
+++ b/conans/client/tools/__init__.py
@@ -3,6 +3,8 @@
 # noinspection PyUnresolvedReferences
 from .apple import *
 # noinspection PyUnresolvedReferences
+from .cmake import *
+# noinspection PyUnresolvedReferences
 from .env import *
 # noinspection PyUnresolvedReferences
 from .files import *
diff --git a/conans/client/tools/cmake.py b/conans/client/tools/cmake.py
new file mode 100644
index 00000000000..c6179037fb6
--- /dev/null
+++ b/conans/client/tools/cmake.py
@@ -0,0 +1,11 @@
+from conans.client.tools.files import save
+
+
+def create_cmake_module_alias_targets(_, module, targets):
+    content = ""
+    for alias, aliased in targets.items():
+        content += "if(TARGET {aliased} AND NOT TARGET {alias})\n" \
+                   "    add_library({alias} INTERFACE IMPORTED)\n" \
+                   "    set_property(TARGET {alias} PROPERTY INTERFACE_LINK_LIBRARIES {aliased})\n" \
+                   "endif()\n".format(alias=alias, aliased=aliased)
+    save(module, content)
diff --git a/conans/test/functional/generators/cmake_find_package_multi_test.py b/conans/test/functional/generators/cmake_find_package_multi_test.py
index bc5cd45fe12..2e5c904eff3 100644
--- a/conans/test/functional/generators/cmake_find_package_multi_test.py
+++ b/conans/test/functional/generators/cmake_find_package_multi_test.py
@@ -11,6 +11,67 @@
 from conans.util.files import load
 
 
+@pytest.mark.tool_cmake
+class TestCreateModuleOfficialCMakeTargets:
+    def test_create_module_official_cmake_targets(self):
+        client = TestClient()
+
+        conanfile = textwrap.dedent("""
+            import os
+            from conans import ConanFile, CMake, tools
+
+            class Conan(ConanFile):
+                name = "hello"
+                version = "1.0"
+                settings = "os", "arch", "compiler", "build_type"
+
+                @property
+                def _module(self):
+                    return os.path.join(self.package_folder, "lib", "cmake",
+                                        "conan-official-foo-targets.cmake")
+
+                def package(self):
+                    tools.create_cmake_module_alias_targets(self, self._module,
+                        {"hello": "hello::hello"})
+
+                def package_info(self):
+                    self.cpp_info.builddirs = [os.path.dirname(self._module)]
+                    self.cpp_info.build_modules = [self._module]
+            """)
+
+        client.save({"conanfile.py": conanfile})
+        client.run("create .")
+
+        consumer = textwrap.dedent("""
+            from conans import ConanFile, CMake
+
+            class Conan(ConanFile):
+                name = "consumer"
+                version = "1.0"
+                settings = "os", "compiler", "build_type", "arch"
+                exports_sources = ["CMakeLists.txt"]
+                generators = "cmake_find_package_multi"
+                requires = "hello/1.0"
+
+                def build(self):
+                    cmake = CMake(self)
+                    cmake.configure()
+            """)
+
+        cmakelists = textwrap.dedent("""
+            cmake_minimum_required(VERSION 3.0)
+            project(test)
+            find_package(hello REQUIRED)
+            get_target_property(link_libraries hello INTERFACE_LINK_LIBRARIES)
+            message("hello link libraries: ${link_libraries}")
+            """)
+
+        client.save({"conanfile.py": consumer, "CMakeLists.txt": cmakelists})
+        client.run("create .")
+
+        assert "hello link libraries: hello::hello" in client.out
+
+
 @pytest.mark.tool_cmake
 class TestCMakeFindPackageMultiGenerator:
 
diff --git a/conans/tools.py b/conans/tools.py
index 9b1a11806d1..d967665987a 100644
--- a/conans/tools.py
+++ b/conans/tools.py
@@ -23,6 +23,7 @@
 from conans.client.tools.intel import *  # pylint: disable=unused-import
 from conans.client.tools.apple import *
 from conans.client.tools.android import *
+from conans.client.tools.cmake import *
 # Tools form conans.util
 from conans.util.env_reader import get_env
 from conans.util.files import _generic_algorithm_sum, load, md5, md5sum, mkdir, relative_dirs, \