(#13973) polymorphic_value: conan v2 support

* polymorphic_value: conan v2 support

done as part of @prince-chrismc's webinar

* apply review suggestions

* work around self.info being already cleared

see conan-io/conan#12210

* use conan.tools.build.can_run

* Revert "work around self.info being already cleared"

This reverts commit 84f85e4.

* Apply suggestions from code review

Co-authored-by: Uilian Ries <uilianries@gmail.com>

* align test package to templates

Co-authored-by: Uilian Ries <uilianries@gmail.com>

recipes/polymorphic_value/all/conanfile.py

@@ -1,7 +1,13 @@
-from conans import ConanFile, tools
-from conans.errors import ConanInvalidConfiguration
+import os
 
-required_conan_version = ">=1.43.0"
+from conan import ConanFile
+from conan.errors import ConanInvalidConfiguration
+from conan.tools.build import check_min_cppstd
+from conan.tools.files import copy, get
+from conan.tools.layout import basic_layout
+from conan.tools.scm import Version
+
+required_conan_version = ">=1.50.0"
 
 
 class PolymorphictValueConan(ConanFile):
@@ -14,10 +20,6 @@ class PolymorphictValueConan(ConanFile):
     settings = "os", "arch", "compiler", "build_type"
     no_copy_source = True
 
-    @property
-    def _source_subfolder(self):
-        return "source_subfolder"
-
     @property
     def _minimum_cpp_standard(self):
         return 17
@@ -32,16 +34,16 @@ def _minimum_compilers_version(self):
         }
 
     def validate(self):
-        if self.settings.compiler.get_safe("cppstd"):
-            tools.check_min_cppstd(self, self._minimum_cpp_standard)
+        if self.settings.get_safe("compiler.cppstd"):
+            check_min_cppstd(self, self._minimum_cpp_standard)
         min_version = self._minimum_compilers_version.get(
             str(self.settings.compiler))
         if not min_version:
-            self.output.warn("{} recipe lacks information about the {} "
-                             "compiler support.".format(
-                                 self.name, self.settings.compiler))
+            self.output.warning("{} recipe lacks information about the {} "
+                                "compiler support.".format(
+                                    self.name, self.settings.compiler))
         else:
-            if tools.Version(self.settings.compiler.version) < min_version:
+            if Version(self.settings.compiler.version) < min_version:
                 raise ConanInvalidConfiguration(
                     "{} requires C++{} support. "
                     "The current compiler {} {} does not support it.".format(
@@ -50,20 +52,24 @@ def validate(self):
                         self.settings.compiler.version))
 
     def package_id(self):
-        self.info.header_only()
+        self.info.clear()
+
+    def layout(self):
+        basic_layout(self, src_folder="src")
 
     def source(self):
-        tools.get(**self.conan_data["sources"][self.version],
-                  strip_root=True, destination=self._source_subfolder)
+        get(self, **self.conan_data["sources"][self.version], strip_root=True)
 
     def package(self):
-        self.copy(pattern="polymorphic_value.*", dst="include",
-                  src=self._source_subfolder)
-        self.copy("*LICENSE*", dst="licenses", keep_path=False)
+        copy(self, "polymorphic_value.*", self.source_folder,
+             os.path.join(self.package_folder, "include"))
+        copy(self, "*LICENSE*", self.source_folder,
+             os.path.join(self.package_folder, "licenses"), keep_path=False)
 
     def package_info(self):
         self.cpp_info.set_property("cmake_file_name", "polymorphic_value")
-        self.cpp_info.set_property("cmake_target_name", "polymorphic_value::polymorphic_value")
+        self.cpp_info.set_property(
+            "cmake_target_name", "polymorphic_value::polymorphic_value")
 
         self.cpp_info.names["cmake_find_package"] = "polymorphic_value"
         self.cpp_info.names["cmake_find_package_multi"] = "polymorphic_value"

recipes/polymorphic_value/all/test_package/CMakeLists.txt

@@ -1,9 +1,6 @@
 cmake_minimum_required(VERSION 3.12)
 project(test_package CXX)
 
-include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
-conan_basic_setup(TARGETS)
-
 find_package(polymorphic_value REQUIRED CONFIG)
 
 add_executable(${PROJECT_NAME} test_package.cpp)

recipes/polymorphic_value/all/test_package/conanfile.py

@@ -1,16 +1,27 @@
-from conans import ConanFile, CMake, tools
 import os
 
+from conan import ConanFile
+from conan.tools.build import can_run
+from conan.tools.cmake import CMake, cmake_layout
+
 
 class TestPackageConan(ConanFile):
     settings = "os", "arch", "compiler", "build_type"
-    generators = "cmake", "cmake_find_package_multi"
+    generators = "CMakeDeps", "CMakeToolchain", "VirtualRunEnv"
+    test_type = "explicit"
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def layout(self):
+        cmake_layout(self)
 
     def build(self):
         cmake = CMake(self)
         cmake.configure()
         cmake.build()
 
     def test(self):
-        if not tools.cross_building(self):
-            self.run(os.path.join("bin", "test_package"), run_environment=True)
+        if can_run(self):
+            bin_path = os.path.join(self.cpp.build.bindirs[0], "test_package")
+            self.run(bin_path, env="conanrun")

recipes/polymorphic_value/all/test_v1_package/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.12)
+project(test_package CXX)
+
+include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
+conan_basic_setup(TARGETS)
+
+find_package(polymorphic_value REQUIRED CONFIG)
+
+add_executable(${PROJECT_NAME} ../test_package/test_package.cpp)
+target_link_libraries(${PROJECT_NAME} PRIVATE polymorphic_value::polymorphic_value)
+target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_20)

recipes/polymorphic_value/all/test_v1_package/conanfile.py

@@ -0,0 +1,20 @@
+import os
+
+from conan.tools.build import cross_building
+from conans import CMake, ConanFile
+
+
+# legacy validation with Conan 1.x
+class TestPackageV1Conan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "cmake", "cmake_find_package_multi"
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if not cross_building(self):
+            bin_path = os.path.join("bin", "test_package")
+            self.run(bin_path, run_environment=True)