move python interpreter to settings

Author: runestonetest

controllers/ajax.py

@@ -986,8 +986,11 @@ def preview_question():
         # Prevent any changes to the database when building a preview question.
         del env['DBURL']
         # Run a runestone build.
+        # We would like to use sys.executable But when we run web2py
+        # in uwsgi then sys.executable is uwsgi which doesn't work.
+        # Why not just run runestone?
         popen_obj = subprocess.Popen(
-            [sys.executable, '-m', 'runestone', 'build'],
+            [settings.python_interpreter, '-m', 'runestone', 'build'],
             # The build must be run from the directory containing a ``conf.py`` and all the needed support files.
             cwd='applications/{}/build/preview'.format(request.application),
             # Capture the build output in case of an error.

models/0.py

@@ -8,6 +8,7 @@
 from gluon.storage import Storage
 import logging
 from os import environ
+import sys
 
 settings = Storage()
 
@@ -61,3 +62,4 @@
 settings.logger = "web2py.app.runestone"
 settings.sched_logger = settings.logger  # works for production where sending log to syslog but not for dev.
 settings.log_level = logging.DEBUG
+settings.python_interpreter = sys.executable