[question] Can't find package configuration file for pre-build binary package

[dwswingle]

What is your question?

Hello,

I am trying to create a pre-built binary package and have it be consumed by a C++ CMake project. I'm currently getting the following error:

CMake Error at CMakeLists.txt:15 (find_package): Could not find a package configuration file provided by testme" with any of the following names: testmeConfig.cmake testme-config.cmake Add the installation prefix of "testme" to CMAKE_PREFIX_PATH or set "testme_DIR" to a directory containing one of the above files. If "testme" provides a separate development package or SDK, be sure it has been installed.

Here is my current conanfile.py below. What am I missing? I'm not sure how to add the CMake generation items in this:

import_ os
from conan.tools.files import get, copy
from conan import ConanFile

class helloRecipe(ConanFile):
    name = "testme"
    settings = "os", "arch"

    def set_version(self):
        self.version = os.environ['generated_version_tag']

    def build(self):
        get(self, "https://artifactory.test.com/artifactory/generic-sandbox/testme/testme-Linux_2.6_x86_64_gcc85-Release.tgz")        

    def package(self):
        copy(self, "*.h*", self.build_folder, os.path.join(self.package_folder, "include"))
        copy(self, "*.a", self.build_folder, os.path.join(self.package_folder, "lib"))
        copy(self, "*.so*", self.build_folder, os.path.join(self.package_folder, "lib"))
        copy(self, "*.lic", self.build_folder, os.path.join(self.package_folder, "licenses"))

    def package_info(self):
        self.cpp_info.libs = ["testme_cf",
                "testme_cxx",
                "testme_xml",
                "testme_provider",
                "testme_dyntype",
                "testme_dyntype_xml" ]
        self.cpp_info.includedirs = [ "include/testme/target/include",
                "include/testme/target/include/dds_cxx" ]
        self.cpp_info.libdirs = [ "lib/testme/target/Linux_2.6_x86_64_gcc85/lib" ]

Have you read the CONTRIBUTING guide?

• I've read the CONTRIBUTING guide

[memsharded]

Hi @dwswingle

Thanks for your question.

The usage from the consumer side is as important as having the right recipe: which generators are you using, which commands...
If you can please report:

• The conanfile you are using for consuming the package
• The commands that you are executing
• The full output of the commands

That might help to understand what could be missing.

Some extra tips:

• This testing of a package you create is automatically done by test_package functionality: https://docs.conan.io/2/tutorial/creating_packages/test_conan_packages.html
• In general the includedirs = ["include"] or something simple. Having "include/testme/target/include" is a little suspicious. The recommendation is that consumers should use #include "testme/path/to/include.h" with the testme explicit there to avoid collisions (if testme had a utils.h, which could also exist in another package)
• Same for lib/testme/target/Linux_2.6_x86_64_gcc85/lib, typically you wan to have libdirs = ["lib"]. Conan will manage the variability of binaries, no need to have something like Linux_2.6_x86_64_gcc85 in that path. You can make the package() method to put things in the right place
• os.environ['generated_version_tag'] you might better use the --version=myversion argument in command line, env-vars might be a bit problematic as being more global.

[dwswingle]

conanfile I'm using to consume the package:

from conan import ConanFile
from conan.tools.cmake import CMakeToolchain, CMake, cmake_layout, CMakeDeps
from conan.tools.build import check_min_cppstd
from os import environ, path

class CoreRecipe(ConanFile):
    name = "core"
    package_type = "shared-library"
    exports_sources = "cmake/*", "example/*", "interface_builder/*", "cyclone_interface/*", "CMakeLists.txt"
    
    settings = "os", "compiler", "build_type", "arch"

    def requirements(self):
        self.requires("cyclonedds/0.10.4", transitive_libs=True, transitive_headers=True)
        self.requires("cyclonedds-cxx/0.10.4", transitive_libs=True, transitive_headers=True)
        self.requires("testme/v0.0.1")

        self.tool_requires("ninja/1.12.1")
        self.tool_requires("cmake/3.29.5")

    def set_version(self):
        self.version = environ['generated_version_tag']

    def validate(self):
        check_min_cppstd(self, "17")

    def layout(self):
        cmake_layout(self, generator="Ninja")

    def generate(self):
        deps = CMakeDeps(self)
        deps.generate()
        tc = CMakeToolchain(self, generator="Ninja")
        tc.variables["USING_CONAN"] = True
        tc.user_presets_path = 'ConanPresets.json'
        tc.generate()

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

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

    def package_info(self):

        cmake_modules = list()
        cmake_modules.append(path.join("cmake/modules", "generated_dds_dependencies.cmake"))
        cmake_modules.append(path.join("cmake/modules", "generated_dds_interface.cmake"))
        cmake_modules.append(path.join("cmake/modules", "idl_rules.cmake"))
        self.cpp_info.set_property("cmake_build_modules", cmake_modules)

        self.cpp_info.components["CMakeScripts"].includedirs= ["cmake/modules"]
        self.cpp_info.components["InterfaceBuilder"].includedirs= ["scripts/InterfaceBuilder"]

commands executing:

conan install . -pr:b default-abi11 -pr:h default-abi11 -b missing -s build_type=Release
source build/Release/generators/conanbuild.sh
cmake --preset conan-Release
cmake --build --preset conan-Release
conan export-pkg . -pr:b default-abi11 -pr:h default-abi11 -s build_type=Release

fails on the build step:

CMake Error at example/CMakeLists.txt:15 (find_package):
  Could not find a package configuration file provided by "testme" with
  any of the following names:

    testmeConfig.cmake
    testme-config.cmake

  Add the installation prefix of "testme" to CMAKE_PREFIX_PATH or set
  "testme_DIR" to a directory containing one of the above files.  If
  "testme" provides a separate development package or SDK, be sure it
  has been installed.


-- Configuring incomplete, errors occurred!

I do have a test package that passes, but maybe I implemented it incorrect. Let me review that. Will also review the additional tips. thank you!

[memsharded]

Thanks for sharing those details!

fails on the build step:

It seems you are using your own presets that include the Conan generated ones.
Can you post the full output of the cmake --preset conan-Release command?

One thing that could be related, though I am not sure if it would fix, is that you package (the exported-pkg one, not the consumer one) is missing a package_type. If it is a shared library, it should probably be package_type = "shared-library".