refactor(templates/bash): unset environment variables without Python

1 files changed, 10 insertions, 2 deletions

diff --git a/templates/bash/template.sh b/templates/bash/template.sh
index 04af08f..8e8d75a 100644
--- a/templates/bash/template.sh
+++ b/templates/bash/template.sh
@@ -236,8 +236,16 @@ scenario_{{ loop.index }}() {
 #############################################################################
 # Make the environment minimal.
 
-# unset all environment variables
-unset $(python3 -c 'import os; print("".join(x + "\n" for x in os.environ.keys()))')
+# Write to stdout the names of all environment variables, one per
+# line. Handle also cases where the value of an environment variable
+# contains newlines.
+envnames()
+{
+    env -0 | xargs -0 -n1 -i'{}' sh -c "printf '%s\n' '{}' | head -n1 | sed 's/=.*//'"    
+}
+
+# unset all environment variables.
+unset $(envnames)
 export PATH=/bin:/usr/bin
 export SHELL=/bin/sh
 export HOME=/  # Will be set to datadir for each scenario.