virtualenv: activate.sh fails if 'nounset' option is set

I get the following error when I try to activate a virtualenv.

$ source test-env/bin/activate
-bash: _OLD_VIRTUAL_PATH: unbound variable

This is happening because I’ve configured Bash to use the nounset option, which throws an error when accessing unset variables (see here)

About this issue

Original URL
State: closed
Created 13 years ago
Comments: 24 (9 by maintainers)

Commits related to this issue

Workaround to virtual environment's nounset bug. Workaround to https://github.com/pypa/virtualenv/issues/150 — committed to Bioconductor/packagebuilder by b-long 9 years ago
Workaround for this issue: https://github.com/pypa/virtualenv/issues/150 — committed to Burnetts/fair-ubuntu-centre by Burnetts 7 years ago
Workaround for this issue: https://github.com/pypa/virtualenv/issues/150 — committed to fairdk/fair-ubuntu-centre by Burnetts 7 years ago

Most upvoted comments

Workaround for now—

set -o nounset

[...]

set +o nounset
. ~/.env/bin/activate
set -o nounset

[...]

beaumartinez on Apr 17, 2014

Actually, that’s a lame fix, since it requires rewriting all existential tests. It’s far easier to just add set -o nounset to the top of the script.

billputer on Jul 7, 2011