Move development reqirements to dev-requirements.txt

In some cases, such as when working inside a virtual environment, it can
be desirable to install all dependencies for running tests using `pip`.
This is currently not possible since setuptools does not support
installing these dependencies in a virtual environment (by design).
(See https://stackoverflow.com/a/21003259.)

To circumvent this issue, move such requirements to
`dev-requirements.txt` file that can be used easily with
`pip install -r`. This also enables tests to be run directly using
`pytest`, which can be more convenient than `-addopts` approach when one
needs to add multiple options.

This will also be useful in creating better testuite images, and fix
some of the issues noticed in
https://gitlab.com/BuildStream/buildstream-docker-images/merge_requests/56.

1 files changed, 3 insertions, 0 deletions

diff --git a/MANIFEST.in b/MANIFEST.in
index 3c8cc64b4..80c815e55 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -21,3 +21,6 @@ recursive-include tests *.expected
 
 # Protocol Buffers
 recursive-include buildstream/_protos *.proto
+
+# Requirements files
+dev-requirements.txt