add abseil recipe

recipes/abseil/all/test_package/conanfile.py

@@ -0,0 +1,33 @@
+from conan import ConanFile
+from conan.tools.build import cross_building
+from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout
+from conan.tools.scm import Version
+import os
+
+
+class TestPackageConan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "CMakeDeps", "VirtualRunEnv"
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def layout(self):
+        cmake_layout(self)
+
+    def generate(self):
+        tc = CMakeToolchain(self)
+        tc.variables["CXX20_SUPPORTED"] = Version(self.dependencies["abseil"].ref.version) > "20210324.2"
+        tc.generate()
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if not cross_building(self):
+            bin_path = os.path.join(self.cpp.build.bindirs[0], "test_package")
+            self.run(f"{bin_path} -s", env="conanrun")
+            bin_global_path = os.path.join(self.cpp.build.bindirs[0], "test_package_global")
+            self.run(f"{bin_global_path} -s", env="conanrun")