[question] The usage of runenv

[aiyolo]

What is your question?

This link https://github.com/conan-io/conan-center-index/blob/master/recipes/spdlog/all/conanfile.py shows the recipe of spdlog.

I found that although there's no runenv relative setting in package_info() method, but when I built my app with shared spdlog dependency, after I activated the runenv script , the spdlog bin folder can still be added to PATH. Why?

Have you read the CONTRIBUTING guide?

• I've read the CONTRIBUTING guide

[memsharded]

The bindirs of the packages is always automatically added to the runenv scripts in form of PATH, LD_LIBRARY_PATH, DYLD_LIBRARY_PATH environment variables.

[aiyolo]

Thanks for you reply! This page https://docs.conan.io/2/reference/conanfile/methods/package_info.html says that bindirs will automatically added to the runenv scripts, and the default bindirs is ['bin']. It seems that when I package my prebuilt binaries, there is no need to explicitly set the self.cpp_info.bindirs property.

Question:
My following recipe won't auto add runenv to PATH, if I comment self.runenv_info.append_path("PATH", os.path.join(self.package_folder, "bin")), It seems that self.cpp_info.bindirs not works here?

import os
from conan import ConanFile
from conan.tools.files import copy


class helloRecipe(ConanFile):
    name = "opencv_enhanced"
    version = "0.2"
    settings = "build_type"

    def layout(self):
        self.folders.build = "opencv_enhanced" 
        self.folders.source = self.folders.build
        self.cpp.source.includedirs = ["include"]
        self.cpp.build.libdirs = ["x64/vc16/lib"]
        self.cpp.build.bindirs = ["x64/vc16/bin"]

    def package(self):
        local_include_folder = os.path.join(self.source_folder, self.cpp.source.includedirs[0])
        local_lib_folder = os.path.join(self.build_folder, self.cpp.build.libdirs[0])
        local_bin_folder = os.path.join(self.build_folder, self.cpp.build.bindirs[0])
        copy(self, "*.h", local_include_folder, os.path.join(self.package_folder, "include"), keep_path=True)
        copy(self, "*.hpp", local_include_folder, os.path.join(self.package_folder, "include"), keep_path=True)
        if self.settings.build_type == "Debug":
            copy(self, "*d.lib", local_lib_folder, os.path.join(self.package_folder, "lib"), keep_path=True)
            copy(self, "*d.dll", local_bin_folder, os.path.join(self.package_folder, "bin"), keep_path=True)
        else:
            copy(self, "*[!d].lib", local_lib_folder, os.path.join(self.package_folder, "lib"), keep_path=True)
            copy(self, "*[!d].dll", local_bin_folder, os.path.join(self.package_folder, "bin"), keep_path=True)

    def package_info(self):
        # self.buildenv_info.append_path("PATH", os.path.join(self.package_folder, "bin"))
        # self.runenv_info.append_path("PATH", os.path.join(self.package_folder, "bin"))
        # print("My Package folder: " + self.package_folder)

        if self.settings.build_type == "Debug":
            self.cpp_info.libs = ["opencv_world3414d"]
        else:
            self.cpp_info.libs = ["opencv_world3414"]

[aiyolo]

It seems that both dep.runenv_info and require.run are false for my requirements.

        for require, dep in list(host_req.items()) + list(test_req.items()):
            if dep.runenv_info:
                self._runenv.compose_env(dep.runenv_info)
            if require.run:  # Only if the require is run (shared or application to be run)
                _os = self._conanfile.settings.get_safe("os")
                self._runenv.compose_env(runenv_from_cpp_info(dep, _os))

[aiyolo]

I figured it out.

I have to explicitly set run=True when I use my created "opencv_enhanced" package. For spdlog, if I set options={"shared"=True}, it will automatically set run=True. But for my created "opencv_enhanced" package, there is no such option can be set in recipe.

   def requirements(self):
        self.requires("opencv_enhanced/0.2", run=True)

[memsharded]

The package_type is very important, and it is not being defined in the name = "opencv_enhanced". If your opencv is a shared lib by default, you need to define package_type = "shared-library". This kind of knowledge is already in the ConanCenter recipe.
If you define it, it will not be necessary to define the run=True.

Likewise, other side feedback: settings = "build_type" is most likely incorrect for many case. At least os and arch should be there.

[aiyolo]

The package_type is very important, and it is not being defined in the name = "opencv_enhanced". If your opencv is a shared lib by default, you need to define package_type = "shared-library". This kind of knowledge is already in the ConanCenter recipe.
If you define it, it will not be necessary to define the run=True.

Likewise, other side feedback: settings = "build_type" is most likely incorrect for many case. At least os and arch should be there.

I understand now. thank you.