Jamie Kirkpatrick created BEAM-6702:
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Summary: GCP dependencies for the Python SDK are too restrictive
Key: BEAM-6702
URL: https://issues.apache.org/jira/browse/BEAM-6702
Project: Beam
Issue Type: Bug
Components: sdk-py-core
Affects Versions: 2.12.0
Reporter: Jamie Kirkpatrick
The fix for [BEAM-3324|https://github.com/apache/beam/pull/7367] introduced a
bunch of dependencies in the `[gcp]` `extras_require` specification and locked
them to specific versions. Unfortunately this has the side-effect of making it
probable that you get version conflicts downstream in projects that include
`apache_beam` in their `requirements.txt`.
As it stands I'm running into issues when I ask
[`pip-compile`](https://github.com/jazzband/pip-tools) to resolve dependencies
with `apache_beam` in the chain (specified like this `-e
git+https://github.com/apache/beam.git@1d13199#egg=apache_beam[gcp]&subdirectory=sdks/python`)
- example output:
```
Could not find a version that matches google-cloud-core<0.29dev,
<0.30dev,==0.28.1,>=0.28.0,>=0.29.0
Tried: 0.20.0, 0.20.0, 0.20.0, 0.20.0, 0.21.0, 0.21.0, 0.21.0, 0.21.0, 0.22.0,
0.22.0, 0.22.0, 0.22.0, 0.22.1, 0.22.1, 0.22.1, 0.22.1, 0.23.0, 0.23.0, 0.23.0,
0.23.0, 0.23.1, 0.23.1, 0.23.1, 0.23.1, 0.24.0, 0.24.0, 0.24.0, 0.24.0, 0.24.1,
0.24.1, 0.24.1, 0.24.1, 0.25.0, 0.25.0, 0.25.0, 0.25.0, 0.26.0, 0.26.0, 0.26.0,
0.26.0, 0.27.0, 0.27.0, 0.27.0, 0.27.0, 0.27.1, 0.27.1, 0.27.1, 0.27.1, 0.28.0,
0.28.0, 0.28.0, 0.28.0, 0.28.1, 0.28.1, 0.28.1, 0.28.1, 0.29.0, 0.29.0, 0.29.0,
0.29.0, 0.29.1, 0.29.1, 0.29.1, 0.29.1
There are incompatible versions in the resolved dependencies.
```
Best practice is to lock your versions explicitly when you actually use a
library (via a projects `requirements.txt`) but leave the requirements
specifications as liberal as possible in `setup.py` - this allows some flex in
the dependency resolution system so that you have a higher chance of different
libraries playing nice.
An example would be to change a requirement like
`'google-cloud-bigtable==0.31.1'` to be `'google-cloud-bigtable>=0.31.1'`
(unless you know of an explicit reason why there is an incompatibility with a
newer version of the library) in the `setup.py` file.
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