fixing the build-requires

[memsharded]

No description provided.

[michaelmaguire]

Hi @memsharded thanks for this. We tried it out and in our sandbox it did indeed fix the issue we saw with ERROR: Build-require 'cmake' cannot be found in lockfile errors during the conan install build-order build as raised in conan-io/conan#8205 (comment)

Question: Earlier in conan-io/conan#8205 (comment) we reported seeing similar errors like:

ERROR: Build-require 'gtest' cannot be found in lockfile

and

ERROR: Build-require 'cmake' cannot be found in lockfile

but these were happening before we got into the conan install prove-out build of the build-orders. I.e. before the conan lock create --reference=app1/0.1@user/testing in your example.

Do we need to use --build=missing earlier on too here, in the conan lock create conanfile.py --name=libb --version=0.2 --base and conan lock create conanfile.py --name=libb at https://github.com/conan-io/examples/blob/master/features/lockfiles/ci/build.py#L73 and https://github.com/conan-io/examples/blob/master/features/lockfiles/ci/build.py#L84 ?