Dependencies in run requirements are not checked properly during build

[constantinpape]

Bulding a conda package with invalid dependencies in the run requirement does not produce an error (during build). However, trying to install the package fails, because the dependencies cannot be resolved:

conda install -c cpape conda_test

fails with:

PackageNotFoundError: Package not found: Conda could not find '

(By the way this cryptic error message does not make this easier to debug.)
Note, that I have a test that tries to import the package in the meta.yaml, which does not fail during the build.
I have the most recent conda (4.3.14) and conda-build (2.1.8) installed.
See https://github.com/constantinpape/conda_tests for a minimal example.

[msarahan]

Your recipe has quite a few issues that I recommend changing. See https://gist.github.com/msarahan/f3c9c0fcd12e0149557bfd1d1d4c6046

Basically:

1. Never pin python directly. Define skip: True for the python versions you don't want.
2. you have an extra s - the test section (not tests section). That means your tests are not getting picked up at all. Not nice that it fails silently here, but we've opted for the flexibility of letting users put anything into their recipes, which unfortunately makes typos very hard to catch.
3. I didn't change your build string line, but it's almost always best to avoid setting this yourself. In your case, by setting it to py_, your package looks like a noarch package, which really confused me for a while. Letting conda set this will give you py27_{{ PKG_BUILDNUM }}, anyway.

Here's what I get on OSX, conda-build 2.1.8, for the adapted recipe:

updating: conda_test-1.0-py_1.tar.bz2
updating index in: /Users/msarahan/miniconda3/conda-bld
TEST START: /Users/msarahan/miniconda3/conda-bld/osx-64/conda_test-1.0-py_1.tar.bz2
Deleting work directory, /Users/msarahan/miniconda3/conda-bld/conda_test_1491250767711/work
updating index in: /Users/msarahan/miniconda3/conda-bld/osx-64
updating index in: /Users/msarahan/miniconda3/conda-bld/noarch
Can't build /Users/msarahan/code/conda_tests/build due to unsatisfiable dependencies:
Packages/dependencies missing in current osx-64 channels:
  - conda_test 1.0 py_1 -> numpy 1.12
  - numpy 1.12

[constantinpape]

Thanks for looking into this.
I have changed the build script according to your suggestions (see updated repo).
However, this has not fixed the issue.
The build passes without throwing an error, I can upload the packages, but installing it fails.

I have tried on Ubuntu 14.04 and 16.04.

[msarahan]

If it's uploading, then you still have recipe problems. The tests (if they run at all) install your package, which should trigger this unsatisfiability error. Please double-check your recipe, especially your test section.

Otherwise, if conda-build is working well enough to get a package uploaded, then it falls on conda for the failure to install your packages (or rather, to tell you why it can't in a meaningful way). If this is the case, please let me know and I'll move this issue to the conda tracker.

[msarahan]

Closing due to inactivity. @constantinpape feel free to reopen if you want to revisit this.

[github-actions]

Hi there, thank you for your contribution!

This issue has been automatically locked because it has not had recent activity after being closed.

Please open a new issue if needed.

Thanks!