[bug] Conan 1.X: prefer build_requires from direct/indirect dependencies over build_requires from profiles

Environment Details (include every applicable attribute)

• Operating System+version: Ubuntu 20.04
• Compiler+version: clang-13
• Conan version: 1.44.1
• Python version: 3.8.10

Steps to reproduce (Include if Applicable)

==> mybin.py <==

import os

from conans import ConanFile

class ConanRecipe(ConanFile):
    name = "mybin"
    version = "1.0.0"

    def build(self):
        pass
        
    def package(self):
        os.makedirs(os.path.join(self.package_folder, "bin"), exist_ok=True)
        self.run("cd %s/bin && echo 'echo mybin' > mybin; chmod +x mybin" % self.package_folder)

==> myproject.py <==

import os

from conans import ConanFile

class ConanRecipe(ConanFile):
    name = "myproject"
    version = "1.0.0"

    def build_requirements(self):
        self.build_requires("mybin/1.0.0")
    
    def build(self):
        print("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
        self.run("mybin")
        print("xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
        self.run("which -a mybin")

==> sysroot.py <==

import os

from conans import ConanFile

class ConanRecipe(ConanFile):
    name = "sysroot"
    version = "1.0.0"

    def build(self):
        pass
        
    def package(self):
        os.makedirs(os.path.join(self.package_folder, "bin"), exist_ok=True)
        self.run("cd %s/bin && echo 'echo sysroot' > mybin; chmod +x mybin" % self.package_folder)

==> sysroot.profile <==

[build_requires]
sysroot/1.0.0

==> run.sh <==

#!/bin/bash

set -ex

conan export sysroot.py
conan export mybin.py
conan export myproject.py test/test

rm -rf build && mkdir build
cd build

conan install myproject/1.0.0@test/test -pr:h=../sysroot.profile -pr:b=../sysroot.profile --build=missing --build=myproject

Logs (Executed commands with output) (Include/Attach if Applicable)

myproject/1.0.0@test/test: Calling build()
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
sysroot
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
/home/EU.BSHG.COM/kleint/.docker-build-scripts/conan_cache/.conan/data/sysroot/1.0.0/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/bin/mybin
/home/EU.BSHG.COM/kleint/.docker-build-scripts/conan_cache/.conan/data/mybin/1.0.0/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/bin/mybin

As you can see the mybin executable from sysroot/1.0.0 (profile) is first in PATH although a package containing mybin was specified as a build_requirement in the conanfile.py.

[thorsten-klein]

+1

[czoido]

-c tools.env.virtualenv:auto_use=True seems to do the trick. can I do it also anyhow without this but specifying generators = "virtualenv" in the conanfile.py? This seems not to work then 😦

@thorsten-klein you could use:

• generators = "VirtualBuildEnv" in myproject
• or set tools.env.virtualenv:auto_use=True in the global.conf

You can read more about that in the Conan v2 migration guide