Imho "source" is an anti-feature. I think instead of "source", you always should create a subshell. It properly encapsulates your modified environment and avoids leakage and confusion. Exiting an environment is a straighforward exit/<ctrl>-D like with any shell. You do not need to remember a special "deactivate" command like with virtualenv.
I swear by subshells. They solve so many problems. People object that they don't let you do environment autoloading on `cd`, though (which I also hate, so... Yeah).
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Because we don't always source a shell script, you may need to source functions for certain functionality to work.
Imho "source" is an anti-feature. I think instead of "source", you always should create a subshell. It properly encapsulates your modified environment and avoids leakage and confusion. Exiting an environment is a straighforward exit/<ctrl>-D like with any shell. You do not need to remember a special "deactivate" command like with virtualenv.
Obviously, virtualenv and others disagree. ;)
I swear by subshells. They solve so many problems. People object that they don't let you do environment autoloading on `cd`, though (which I also hate, so... Yeah).