from conans import ConanFile, CMake
from conans.tools import load, cross_building
import re


def get_version():
    try:
        content = load("include/CLI/Version.hpp")
        version = re.search(r'#define CLI11_VERSION "(.*)"', content).group(1)
        return version
    except Exception:
        return None


class CLI11Conan(ConanFile):
    name = "CLI11"
    version = get_version()
    description = "Command Line Interface toolkit for C++11"
    topics = ("cli", "c++11", "parser", "cli11")
    url = "https://github.com/CLIUtils/CLI11"
    homepage = "https://github.com/CLIUtils/CLI11"
    author = "Henry Schreiner <hschrein@cern.ch>"
    license = "BSD-3-Clause"

    settings = "os", "compiler", "arch", "build_type"
    exports_sources = (
        "LICENSE",
        "README.md",
        "include/*",
        "extern/*",
        "cmake/*",
        "CMakeLists.txt",
        "CLI11.CPack.Description.txt",
        "tests/*",
    )

    def build(self):  # this is not building a library, just tests
        cmake = CMake(self)
        cmake.definitions["CLI11_EXAMPLES"] = "OFF"
        cmake.definitions["CLI11_SINGLE_FILE"] = "OFF"
        cmake.configure()
        cmake.build()
        if not cross_building(self.settings):
            cmake.test()
        cmake.install()

    def package_id(self):
        self.info.header_only()
