Add property to change the CMake variable names generated with CMakeDeps

conan/tools/cmake/cmakedeps/templates/__init__.py

@@ -24,6 +24,10 @@ def root_target_name(self):
     def file_name(self):
         return self.cmakedeps.get_cmake_package_name(self.conanfile, module_mode=self.generating_module) + self.suffix
 
+    @property
+    def legacy_variable_prefix(self):
+        return self.cmakedeps.get_property("cmake_legacy_variable_prefix", self.conanfile)
+
     @property
     def suffix(self):
         if not self.require.build:

conan/tools/cmake/cmakedeps/templates/config.py

@@ -28,7 +28,8 @@ def context(self):
         targets_include += "{}Targets.cmake".format(self.file_name)
         return {"is_module": self.generating_module,
                 "version": self.conanfile.ref.version,
-                "file_name": self.file_name,
+                "file_name":  self.file_name,
+                "legacy_variable_prefix": self.legacy_variable_prefix,
                 "pkg_name": self.pkg_name,
                 "config_suffix": self.config_suffix,
                 "check_components_exist": self.cmakedeps.check_components_exist,
@@ -67,11 +68,17 @@ def template(self):
             endif()
         endforeach()
 
-        set({{ file_name }}_VERSION_STRING "{{ version }}")
-        set({{ file_name }}_INCLUDE_DIRS {{ pkg_var(pkg_name, 'INCLUDE_DIRS', config_suffix) }} )
-        set({{ file_name }}_INCLUDE_DIR {{ pkg_var(pkg_name, 'INCLUDE_DIRS', config_suffix) }} )
-        set({{ file_name }}_LIBRARIES {{ pkg_var(pkg_name, 'LIBRARIES', config_suffix) }} )
-        set({{ file_name }}_DEFINITIONS {{ pkg_var(pkg_name, 'DEFINITIONS', config_suffix) }} )
+        {% if legacy_variable_prefix %}
+            {% set prefix_name = legacy_variable_prefix %}
+        {% else %}
+            {% set prefix_name = file_name %}
+        {% endif %}
+
+        set({{ prefix_name }}_VERSION_STRING "{{ version }}")
+        set({{ prefix_name }}_INCLUDE_DIRS {{ pkg_var(pkg_name, 'INCLUDE_DIRS', config_suffix) }} )
+        set({{ prefix_name }}_INCLUDE_DIR {{ pkg_var(pkg_name, 'INCLUDE_DIRS', config_suffix) }} )
+        set({{ prefix_name }}_LIBRARIES {{ pkg_var(pkg_name, 'LIBRARIES', config_suffix) }} )
+        set({{ prefix_name }}_DEFINITIONS {{ pkg_var(pkg_name, 'DEFINITIONS', config_suffix) }} )
 
         # Only the first installed configuration is included to avoid the collision
         foreach(_BUILD_MODULE {{ pkg_var(pkg_name, 'BUILD_MODULES_PATHS', config_suffix) }} )

conans/test/integration/toolchains/cmake/cmakedeps/test_cmakedeps.py

@@ -707,3 +707,39 @@ def generate(self):
     assert 'set(dep_NO_SONAME_MODE_RELEASE TRUE)' in dep
     other = c.load("app/other-release-data.cmake")
     assert 'set(other_other_mycomp1_NO_SONAME_MODE_RELEASE TRUE)' in other
+
+def test_cmakedeps_set_legacy_variable_name():
+    client = TestClient()
+    conanfile = textwrap.dedent("""\
+            from conan import ConanFile
+
+            class libRecipe(ConanFile):
+                name = "dep"
+                version = "1.0"
+
+                def package_info(self):
+                    self.cpp_info.set_property("cmake_legacy_variable_prefix", "DEP")
+    """)
+    client.save({"conanfile.py": conanfile})
+    client.run("create .")
+    conanfile = textwrap.dedent("""\
+        from conan import ConanFile
+        from conan.tools.cmake import CMakeDeps
+
+        class libRecipe(ConanFile):
+            name = "lib"
+            version = "1.0"
+
+            settings = "os", "compiler", "build_type", "arch"
+
+            def requirements(self):
+                self.requires("dep/1.0")
+
+            def generate(self):
+                deps = CMakeDeps(self)
+                deps.generate()
+    """)
+    client.save({"conanfile.py": conanfile})
+    client.run("install .")
+    dep_config = client.load("dep-config.cmake")
+    assert "DEP_VERSION" in dep_config