improve virtualenv missing message (#594)

2016-04-27 16:41:09 -07:00
parent b998adc6fb
commit 68d329af37
1 changed files with 5 additions and 1 deletions
--- a/dcos/subcommand.py
+++ b/dcos/subcommand.py
@@ -315,7 +315,11 @@ def _find_virtualenv(bin_directory):
        virtualenv_path = util.which('virtualenv')

    if virtualenv_path is None:
-        raise DCOSException('Unable to find the virtualenv program')
+        msg = ("Unable to install CLI subcommand. "
+               "Missing required program 'virtualenv'.\n"
+               "Please see installation instructions: "
+               "https://virtualenv.pypa.io/en/latest/installation.html")
+        raise DCOSException(msg)

    return virtualenv_path