Run tests as regular user

For this to work, we run the smoke test from a temporary directory,
on the CI /var/str/smoke is not writable by non-root.

smoke/venv.sh

@@ -11,8 +11,9 @@ TOX=${TOX:-true}
 CYTHON=${CYTHON:-true}
 INSTALL_OR_SKIP=${INSTALL_OR_SKIP:-false}
 
-# clean from possible older runs
-rm -rf venv .tox __pycache__ .pytest* test_*.py *.pyx *.c *.so ensurepiptestroot || :
+# Work from a custom directory
+workdir="$(mktemp --directory)"
+cd "$workdir"
 
 if [ "$INSTALL_OR_SKIP" == "true" ] && [ ! -f "/usr/bin/$PYTHON" ]; then
   dnf -y install "/usr/bin/$PYTHON" || :
@@ -130,3 +131,7 @@ EOF
 
 # A more complex example with pytest
 tox
+
+# Clean up if everything else went well
+cd -
+rm -rf "$workdir"