requirement on mock can't install dependency #60
Description
On Linux with Python 2.7, adding a requirement("mock") to a py_test target (and possibly other targets) breaks like so:
INFO: Running command line: .bazel/bin/toolchain/generate_crosstool_test
Traceback (most recent call last):
File "/tmp/bazel/out/db099189d67c0d8a/faedb999bdce730c9c495251de1ca1a4/execroot/__main__/bazel-out/k8-fastbuild/bin/toolchain/generate_crosstool_test.runfiles/__main__/toolchain/generate_crosstool_test.py", line 2, in <module>
import mock
File "/tmp/bazel/out/db099189d67c0d8a/faedb999bdce730c9c495251de1ca1a4/execroot/__main__/bazel-out/k8-fastbuild/bin/toolchain/generate_crosstool_test.runfiles/pypi__mock_2_0_0/mock/__init__.py", line 2, in <module>
import mock.mock as _mock
File "/tmp/bazel/out/db099189d67c0d8a/faedb999bdce730c9c495251de1ca1a4/execroot/__main__/bazel-out/k8-fastbuild/bin/toolchain/generate_crosstool_test.runfiles/pypi__mock_2_0_0/mock/mock.py", line 80, in <module>
import funcsigs
ImportError: No module named funcsigs
ERROR: Non-zero return code '1' from command: Process exited with status 1
The mock library has a dependency on funcsigs. It gets installed automatically if you pip install mock For some reason this transitive dependency breaks in the bazel world.
A workaround is to add funcsigs explicitly to the requirements.txt and also as a requirement("funcsigs") to the py_test target. Then everything works fine.