(conan-io#25189) new recipe for melon/1.0.0-alpha.1

* new recipe for melon/1.0.0-alpha.1

* fixed url in conanfile.py

* removed unecessary stuff in conanfile.py + improved test_package

* Cleanup, pin dependencies

---------

Co-authored-by: Abril Rincón Blanco <[email protected]>

recipes/melon/all/conandata.yml

@@ -0,0 +1,4 @@
+sources:
+  "1.0.0-alpha.1":
+    url: "https://github.com/fhamonic/melon/archive/refs/tags/v1.0.0-alpha.1.tar.gz"
+    sha256: "370f6bb1fddc68f1ab771c8b659fed6d9dc8da51290897ed72fd87589143220c"

recipes/melon/all/conanfile.py

@@ -0,0 +1,76 @@
+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
+import os
+
+
+required_conan_version = ">=1.52.0"
+
+class PackageConan(ConanFile):
+    name = "melon"
+    description = "A modern and efficient graph library using C++20 ranges and concepts."
+    license = "BSL-1.0"
+    url = "https://github.com/conan-io/conan-center-index"
+    homepage = "https://github.com/fhamonic/melon"
+    topics = ("graph", "algorithm", "ranges", "c++20", "header-only")
+    package_type = "header-library"
+    settings = "os", "arch", "compiler", "build_type"
+    no_copy_source = True
+
+    @property
+    def _min_cppstd(self):
+        return 20
+
+    @property
+    def _compilers_minimum_version(self):
+        return {
+            "apple-clang": "14",
+            "clang": "17",
+            "gcc": "12",
+            "msvc": "192",
+            "Visual Studio": "17",
+        }
+
+    def layout(self):
+        basic_layout(self, src_folder="src")
+
+    def requirements(self):
+        self.requires("range-v3/0.12.0")
+        self.requires("fmt/10.2.1")
+
+    def package_id(self):
+        self.info.clear()
+
+    def validate(self):
+        if self.settings.compiler.get_safe("cppstd"):
+            check_min_cppstd(self, self._min_cppstd)
+        minimum_version = self._compilers_minimum_version.get(str(self.settings.compiler), False)
+        if minimum_version and Version(self.settings.compiler.version) < minimum_version:
+            raise ConanInvalidConfiguration(
+                f"{self.ref} requires C++{self._min_cppstd}, which your compiler does not support."
+            )
+
+    def source(self):
+        get(self, **self.conan_data["sources"][self.version], strip_root=True)
+
+    def build(self):
+        pass
+
+    def package(self):
+        copy(self, "LICENSE", self.source_folder, os.path.join(self.package_folder, "licenses"))
+        copy(
+            self,
+            "*.hpp",
+            os.path.join(self.source_folder, "include"),
+            os.path.join(self.package_folder, "include"),
+        )
+
+    def package_info(self):
+        self.cpp_info.bindirs = []
+        self.cpp_info.libdirs = []
+
+        if self.settings.os in ["Linux", "FreeBSD"]:
+            self.cpp_info.system_libs.extend(["pthread"])

recipes/melon/all/test_package/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.15)
+project(test_package LANGUAGES CXX)
+
+find_package(melon REQUIRED CONFIG)
+
+add_executable(${PROJECT_NAME} test_package.cpp)
+target_link_libraries(${PROJECT_NAME} PRIVATE melon::melon)
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_20)

recipes/melon/all/test_package/conanfile.py

@@ -0,0 +1,27 @@
+from conan import ConanFile
+from conan.tools.build import can_run
+from conan.tools.cmake import cmake_layout, CMake
+import os
+
+
+# It will become the standard on Conan 2.x
+class TestPackageConan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "CMakeDeps", "CMakeToolchain", "VirtualRunEnv"
+    test_type = "explicit"
+
+    def layout(self):
+        cmake_layout(self)
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if can_run(self):
+            bin_path = os.path.join(self.cpp.build.bindir, "test_package")
+            self.run(bin_path, env="conanrun")

recipes/melon/all/test_package/test_package.cpp

@@ -0,0 +1,47 @@
+#include "melon/algorithm/bidirectional_dijkstra.hpp"
+#include "melon/utility/static_digraph_builder.hpp"
+#include "melon/container/static_digraph.hpp"
+
+using namespace fhamonic::melon;
+
+// test_package with bidirectional dijkstra because it condenses range-v3 uses
+// shown to overwhelm some compilers
+
+int main(int argc, char *argv[])
+{
+    static_digraph_builder<static_digraph, int> builder(6);
+
+    builder.add_arc(0u, 1u, 7);  // 0
+    builder.add_arc(0u, 2u, 9);  // 1
+    builder.add_arc(0u, 5u, 14); // 2
+    builder.add_arc(1u, 0u, 7);  // 3
+    builder.add_arc(1u, 2u, 10); // 4
+    builder.add_arc(1u, 3u, 15); // 5
+    builder.add_arc(2u, 0u, 9);  // 6
+    builder.add_arc(2u, 1u, 10); // 7
+    builder.add_arc(2u, 3u, 12); // 8
+    builder.add_arc(2u, 5u, 2);  // 9
+    builder.add_arc(3u, 1u, 15); // 10
+    builder.add_arc(3u, 2u, 12); // 11
+    builder.add_arc(3u, 4u, 6);  // 12
+    builder.add_arc(4u, 3u, 6);  // 13
+    builder.add_arc(4u, 5u, 9);  // 14
+    builder.add_arc(5u, 0u, 14); // 15
+    builder.add_arc(5u, 2u, 2);  // 16
+    builder.add_arc(5u, 4u, 9);  // 17
+
+    auto [graph, length_map] = builder.build();
+
+    bidirectional_dijkstra alg(graph, length_map, 0u, 3u);
+
+    int dist = alg.run();
+    if (dist != 21) return EXIT_FAILURE;
+
+    if (!alg.path_found()) return EXIT_FAILURE;
+    auto path = alg.path();
+    if (std::ranges::distance(path) != 2) return EXIT_FAILURE;
+    if (std::ranges::find(path, 1u) == path.end()) return EXIT_FAILURE;
+    if (std::ranges::find(path, 8u) == path.end()) return EXIT_FAILURE;
+
+    return EXIT_SUCCESS;
+}

recipes/melon/config.yml

@@ -0,0 +1,3 @@
+versions:
+  "1.0.0-alpha.1":
+    folder: all