script to clone python or R environment.
Project description
virtualenv cloning script.
A script for cloning a non-relocatable virtualenv.
Virtualenv provides a way to make virtualenv's relocatable which could then be
copied as we wanted. However making a virtualenv relocatable this way breaks
the no-site-packages isolation of the virtualenv as well as other aspects that
come with relative paths and /usr/bin/env
shebangs that may be undesirable.
Also, the .pth and .egg-link rewriting doesn't seem to work as intended. This attempts to overcome these issues and provide a way to easily clone an existing virtualenv.
It performs the following:
-
copies
sys.argv[1]
dir tosys.argv[2]
-
updates the hardcoded
VIRTUAL_ENV
variable in the activate script to the new repo location. (--relocatable
doesn't touch this) -
updates the shebangs of the various scripts in bin to the new Python if they pointed to the old Python. (version numbering is retained.)
it can also change
/usr/bin/env python
shebangs to be absolute too, though this functionality is not exposed at present. -
checks
sys.path
of the cloned virtualenv and if any of the paths are from the old environment it finds any.pth
or.egg
link files within sys.path located in the new environment and makes sure any absolute paths to the old environment are updated to the new environment. -
finally it double checks
sys.path
again and will fail if there are still paths from the old environment present.
NOTE: This script requires Python 2.7 or 3.4+
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