conanfile.py

from conan.tools.cmake import CMake, CMakeToolchain, CMakeDeps, cmake_layout
from conan.tools import files
from conan import ConanFile
import os, re
import textwrap

required_conan_version = ">=1.45.0"

def get_version_from_cmakelists():
    if not os.path.exists("CMakeLists.txt"):
        return None

    major_ver = "0"
    minor_ver = "0"
    patch_ver = "0"

    with open("CMakeLists.txt","r") as file_one:
        major_re = re.compile('set\(TIXI_VERSION_MAJOR ([0-9]+)\)')
        minor_re = re.compile('set\(TIXI_VERSION_MINOR ([0-9]+)\)')
        patch_re = re.compile('set\(TIXI_VERSION_PATCH ([0-9]+(-[a-z, A_Z, 0-9]+)?)\)')
        for line in file_one:
            m = major_re.match(line)
            if m:
                major_ver = m.group(1)
            m = minor_re.match(line)
            if m:
                minor_ver = m.group(1)
            m = patch_re.match(line)
            if m:
                patch_ver = m.group(1)

    return "%s.%s.%s" % (major_ver, minor_ver, patch_ver)

class Tixi3Conan(ConanFile):
    name = "tixi3"
    url = "https://github.com/conan-io/conan-center-index"
    description = "A simple xml interface based on libxml2 and libxslt"
    topics = ("tixi3", "xml")
    homepage = "https://github.com/DLR-SC/tixi"
    license = "Apache-2.0"
    version = get_version_from_cmakelists()

    settings = "os", "arch", "compiler", "build_type"
    options = {
        "shared": [True, False],
        "fPIC": [True, False],
    }
    default_options = {
        "shared": False,
        "fPIC": True,
    }

    def generate(self):
        tc = CMakeToolchain(self)
        tc.generate()
        deps = CMakeDeps(self)
        deps.generate()

    def requirements(self):
        self.requires("libxml2/[>=2.12.5 <3]")
        self.requires("libxslt/1.1.39")
        self.requires("libcurl/[>=7.78.0 <9]")

    def layout(self):
        cmake_layout(self)

    def config_options(self):
        if self.settings.os == "Windows":
            del self.options.fPIC

    def configure(self):
        if self.options.shared:
            self.options.rm_safe("fPIC")
        # tixi is a c library
        self.settings.rm_safe("compiler.cppstd")
        self.settings.rm_safe("compiler.libcxx")

    def export_sources(self):
        self.output.info("Executing export_sources() method")
        files.copy(self, "*", src=self.recipe_folder, dst=self.export_sources_folder)

    def build(self):
        cmake = CMake(self)
        cmake.configure()
        cmake.build()

    def _create_cmake_module_alias_targets(self, module_file, targets):
        content = ""
        for alias, aliased in targets.items():
            content += textwrap.dedent(f"""\
                if(TARGET {aliased} AND NOT TARGET {alias})
                    add_library({alias} INTERFACE IMPORTED)
                    set_property(TARGET {alias} PROPERTY INTERFACE_LINK_LIBRARIES {aliased})
                endif()
            """)
        files.save(self, module_file, content)

    def package(self):
        cmake = CMake(self)
        cmake.install()

        files.rmdir(self, os.path.join(self.package_folder, "lib", "tixi3"))
        files.copy(self, "LICENSE", dst=os.path.join(self.package_folder, "licenses"), src=self.source_folder)
        files.rmdir(self, os.path.join(self.package_folder, "share"))

        # provide alias target tixi3 for v1 packages
        self._create_cmake_module_alias_targets(
            os.path.join(self.package_folder, self._module_file_rel_path),
            {"tixi3": "tixi3::tixi3"}
        )

    @property
    def _module_file_rel_path(self):
        return os.path.join("lib", "cmake", "conan-official-{}-targets.cmake".format(self.name))


    def package_info(self):
        self.cpp_info.includedirs.append(os.path.join("include", "tixi3"))

        if self.settings.build_type != "Debug":
            self.cpp_info.libs = ['tixi3']
        else:
            self.cpp_info.libs = ['tixi3-d']

        if self.settings.os == "Windows":
            self.cpp_info.system_libs = ['Shlwapi']

        self.cpp_info.set_property("cmake_file_name", "tixi3")
        self.cpp_info.set_property("cmake_target_name", "tixi3")

        # provide alias target tixi3 for v1 packages
        self.cpp_info.builddirs.append(os.path.join("lib", "cmake"))
        self.cpp_info.build_modules["cmake_find_package"] = [self._module_file_rel_path]
        self.cpp_info.build_modules["cmake_find_package_multi"] = [self._module_file_rel_path]