Locust: Installing 0.12.1 requires "pipenv lock --pre"

[schinckel]

The latest release of locustio cannot really be managed using pipenv. It includes a dependency of geventhttpclient-wheels, which has only pre-release versions available.

As such, it is not possible to generate a Pipfile.lock file without using pipenv lock --pre.

Doing this will install pre-release versions of other packages, which is problematic. (In my case, it installed a 5.0dev version of coverage, which uses a different coverage file format).

[schinckel]

(It's possible that this was also present in earlier versions: my last lock file that worked correctly indicated that it worked fine with 0.11.0).

[heyman]

Thanks for reporting this! I'll try to issue a non pre-release version of geventhttoclient-wheels today.

[heyman]

If we pinned the version to the prerelease one, would that solve the problem?

[schinckel]

I’m not sure: I think maybe Pipenv would still complain.

[heyman]

I just tried installing geventhttpclient-wheels using pipenv:

pipenv install geventhttpclient-wheels

Which failed because I didn't use the --pre flag. However the installation succeeded when I ran:

pipenv install geventhttpclient-wheels==1.3.1.dev2

Wouldn't that indicate that it would work if we pinned the version locust's setup.py? I haven't used pipenv much, and not sure how to test it.

[heyman]

I pinned the version in master, and now pipenv install -e git+https://github.com/locustio/locust.git#egg=locustio succeeds, so I'm assuming it fixed it.

[martinpeck]

I'm not sure this has fixed things. The version of gevent being specified for locust is 1.5a2. This is a pre-release version. When I pipenv install locustio I get the same errors as the original poster.

[easherma]

Same, I get the same errors. @heyman Can you re-open this?

[heyman]

That's unfortunate. I could issue a non pre-release version of the geventhttpclient-wheels package, though I'd prefer not to, since I think it'd be better to follow the same version number as the official geventhttpclient package.

Gevent 1.5 fixes fixes a bug which would cause Locust's Web UI to crash on Python 3.8 (#1154), so I don't think we'd want to downgrade to gevent 1.4 (the latest non pre-release version).

Therefore, I don't see a good fix for this at the moment, except from maybe documenting it.

[cyberw]

@heyman You reopened this, but say there is no good solution :) I guess we are stuck waiting for a new release on geventhttpclient? Or should we "solve" the ticket by just documenting it?

[heyman]

@cyberw We currently also pin the gevent version to 1.5a2 (to fix a crash on Python 3.8 (#1154)) which also is a pre-release version, so just releasing a non pre-release version of geventhttpclient-wheels won't resolve it.

I think we should wait with a fix until gevent 1.5 is released. Until then I think it's a good idea to leave this open so that it's more discoverable for people running into the issue.

[linhnvhicts]

I encountered the same problem with locustio 0.4.5 version

Could not find a version that matches gevent==1.5a3,>=0.13

The only way i was able to install properly with pipenv is to use :

pipenv install --pre locustio

Hope this helped someone trying to install with pipenv

Also does locustio use grpcio 1.28.0 pre release version too ? as i see grpcio in my piplock file updated from version 1.27.2 to 1.28.0rc3(it's the only one beside gevent that got updated to pre release version

[farridav]

This has affected me too, used workaround thanks @linhnvhicts

[cyberw]

@heyman Now that there is a gevent 1.5 release, I guess we could build a non-prerelease eventhttpclient-wheels version?

[heyman]

@cyberw Yes, we could do that. Only problem is that the version numbers in our geventhttpclient-wheels package would diverge from geventhttpclient, but maybe that's okay.

[Kilo59]

@linhnvhicts
@cyberw

IMO using the pre-release flag is not a good solution, as it will cause ALL dependencies (not just locust deps) in your project to use the lastest pre-release versions, which are often unstable and could cause things to break in unpredictable ways.

You are better of adding a pinned version of geventhttpclient-wheels to your Pipfile as @heyman suggested.

pipenv install geventhttpclient-wheels==1.3.1.dev3

@farridav
Try clearing your pipenv cache and re-locking.
pipenv lock --clear
https://pipenv.pypa.io/en/latest/diagnose/#your-dependencies-could-not-be-resolved

Having said all that...
I haven't had any issues using the latest version of locust in my pipenv managed projects. Pinning geventhttpclient-wheels in setup.py __should__ have fixed that.

[cyberw]

Fixed (a while back)