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jenkinsci / pyenv-pipeline-plugin

Execute commands in Python virtualenvs in Jenkins Pipeline DSL
https://plugins.jenkins.io/pyenv-pipeline/
MIT License
33 stars 15 forks source link

Can `withPythonEnv` block also affect `sh` steps? #6

Closed r4v5 closed 6 years ago

r4v5 commented 7 years ago

This plugin is useful, but multiple people in my organization, when trying it, have missed the fact that any commands you want to run within a virtualenv must be invoked as pysh steps instead of regular sh. The typical behavior we've come to expect for withSomething{} pipeline blocks (withEnv, withCredentials, etc) has been that they affect the behavior of every shell command within the block; is there a reason (technical or philosophical) for separating out that behavior in this plugin?

cstarner commented 7 years ago

Plugging into the sh and bat steps had been my original goal when I was first working on this plugin; however I didn't find a way to accomplish this. I attempted to intercept the sh and bat commands in order to conditionally manipulate them; however, it appears that Jenkins doesn't allow this kind of behavior (with good reason, it could potentially lead to very difficult to trace issues).

Since virtualenv works primarily through the manipulation of environmental variables, it is theoretically possible to supply the manipulated environment to each sh command that occurs within the block; however, I didn't see a good way to accomplish this either, short of reimplementing virtualenv myself.

This is why I made the decision to use pysh and pybat instead.

cstarner commented 7 years ago

Actually, after poking around some more, there may be a way to accomplish this. I need to mess around with it, and will report back here

cstarner commented 7 years ago

After poking around a bit, I believe that I can capture the relevant changes in EnvVars that the virtualenv makes, and make those changes available within the body of withPythonEnv. Doing so would allow sh and bat steps to access the virtualenv as requested.

Life has been getting in the way recently, and I apologize for the delay. As soon as I get a little extra time I will knock this out

r4v5 commented 7 years ago

Awesome news about possibly being able to do it with environment variables! I understand life getting in the way. Take your time; in the meantime, it's just two more characters for us to type, it's not more important than the rest of your life.

cstarner commented 6 years ago

This functionality has been added, and will be released shortly as version 2.0.0