add package for the rocket library

recipes/rocket/all/conandata.yml

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+sources:
+  "2.0":
+    commit: "348869fcda83f8b8b521c7654f83fea07ebe7a0a"

recipes/rocket/all/conanfile.py

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+from conan import ConanFile
+from conan.tools.files import copy
+from conan.tools.scm import Git
+import os
+
+required_conan_version = ">=2.0.0"
+
+class RocketConan(ConanFile):
+    name = "rocket"
+    description = "Fast single header signal/slots library for C++"
+    license = "public domain"
+    topics = ("signal-slots", "observer-pattern")
+    homepage = "https://github.com/tripleslash/rocket"
+    url = "https://github.com/conan-io/conan-center-index"
+    package_type = "header-library"
+
+    def source(self):
+        git = Git(self)
+        git.clone(url="https://github.com/tripleslash/rocket.git", target=".")
+        git.checkout(**self.conan_data["sources"][self.version])
+
+    def build(self):
+        pass
+
+    def package(self):
+        copy(self, "rocket.hpp", self.build_folder, os.path.join(self.package_folder, "include"))
+
+    def package_info(self):
+        self.cpp_info.libs = ["rocket"]

recipes/rocket/all/test_package/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.15)
+project(PackageTest)
+
+find_package(rocket CONFIG REQUIRED)
+
+add_executable(example src/example.cpp)
+target_link_libraries(example rocket::rocket)

recipes/rocket/all/test_package/conanfile.py

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+import os
+
+from conan import ConanFile
+from conan.tools.cmake import CMake, cmake_layout
+from conan.tools.build import can_run
+
+
+class RocketTestConan(ConanFile):
+    settings = "os", "compiler", "build_type", "arch"
+    generators = "CMakeDeps", "CMakeToolchain"
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def layout(self):
+        cmake_layout(self)
+
+    def test(self):
+        if can_run(self):
+            cmd = os.path.join(self.cpp.build.bindir, "example")
+            self.run(cmd, env="conanrun")

recipes/rocket/all/test_package/src/example.cpp

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+#include <cstdlib>
+
+#include "rocket.hpp"
+
+int main()
+{
+    rocket::signal<int(int)> test;
+    test.connect([](int x)
+                 { return x * 3; });
+
+    constexpr int value = 2;
+    return test(value) == value*3 ? EXIT_SUCCESS : EXIT_FAILURE;
+}

recipes/rocket/config.yml

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+versions:
+  "2.0":
+    folder: "all"