Add a check to see if virtualenv is installed.

1 files changed, 2 insertions, 2 deletions

diff --git a/dev b/dev
index 9f66cbaf..f9fcb95e 100755
--- a/dev
+++ b/dev
@@ -1,11 +1,11 @@
 #!/bin/sh
 VENV=../venv.mitmproxy
 
-virtualenv $VENV
+virtualenv $VENV || { echo 'virtualenv is not installed. Exiting.' ; exit 1; }
 source $VENV/bin/activate
 pip install --src .. -r requirements.txt
 
 echo ""
 echo "* Created virtualenv environment in $VENV."
 echo "* Installed all dependencies into the virtualenv."
-echo "* Activated virtualenv environment."
\ No newline at end of file
+echo "* Activated virtualenv environment."