Use a custom directory for exposed Python packages

Isolate snekbox's dependencies from the packages available within the
Python interpreter. Disable Python's default behaviour of site-dependent
manipulations of sys.path. The custom directory looks like a user site
to allow `pip install --user` to work with it. However, snekbox will see
it as simply an additional search path for modules rather than as a user
site.

Disable isolated mode (-I) because it implies (-E), which ignores
PYTHON* environment variables. This conflicts with the reliance on
`PYTHONPATH`.

Specify `PYTHONUSERBASE` in the Dockerfile to make installing packages
to expose more intuitive for users. Otherwise, they'd have to remember
to set this variable every time they need to install something.

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/.profile b/scripts/.profile
index 9bf8e09..11c8d78 100644
--- a/scripts/.profile
+++ b/scripts/.profile
@@ -17,5 +17,5 @@ nsjpy() {
     nsjail \
         --config "${NSJAIL_CFG:-/snekbox/config/snekbox.cfg}" \
         $nsj_args -- \
-        /usr/local/bin/python -Iqu -c "$@"
+        /usr/local/bin/python -Squ -c "$@"
 }