ENH/TMP: Preliminary support for bash scripts.

 - Changing the Question model to add a language attribute.
 - Moving python_server.py -> code_server.py.
 - Adding functionality to test for Shell scripts.  This is still
   incomplete since the shell code checker seems to have some problems.
 - Modified the xmlrpc_clients to support multiple languages and right
   now two.
 - Using setgid/setuid instead of setegid/seteuid in the code_server.py..
 - Adding a bash example to the sample_questions.py.

The shell script support doesn't quite work yet but this is really a
code_server/checking issue.

2 files changed, 17 insertions, 0 deletions

diff --git a/docs/sample_questions.py b/docs/sample_questions.py
index 2a9eaf8..eac9479 100644
--- a/docs/sample_questions.py
+++ b/docs/sample_questions.py
@@ -4,6 +4,7 @@ questions = [
 Question(
     summary='Factorial',
     points=2,
+    language="python",
     description='''
 Write a function called <code>fact</code> which takes a single integer argument
 (say <code>n</code>) and returns the factorial of the number. 
@@ -18,6 +19,7 @@ assert fact(5) == 120
 Question(
     summary='Simple function',
     points=1,
+    language="python",
     description='''Create a simple function called <code>sqr</code> which takes a single 
 argument and returns the square of the argument. For example: <br/>
 <code>sqr(3) -> 9</code>.''',
@@ -26,6 +28,19 @@ import math
 assert sqr(3) == 9
 assert abs(sqr(math.sqrt(2)) - 2.0) < 1e-14 
     '''),
+Question(
+    summary='Bash addition',
+    points=2,
+    language="bash",
+    description='''Write a shell script which takes two arguments on the
+    command line and prints the sum of the two on the output.''',
+    test='''\
+#!/bin/bash
+[[ $# -eq 2 ]] && echo $(( $1 + $2 )) && exit $(( $1 + $2 ))
+#++++++
+1 2
+2 1
+'''),
 ]
 
 quiz = Quiz(start_date=date.today(),
diff --git a/docs/sample_questions.xml b/docs/sample_questions.xml
index 104ea32..cad205b 100644
--- a/docs/sample_questions.xml
+++ b/docs/sample_questions.xml
@@ -10,6 +10,7 @@ and returns the factorial of the number.
 For example fact(3) -> 6
 </description>
 <points>2</points>
+<language>python</language>
 <test>
 assert fact(0) == 1
 assert fact(5) == 120
@@ -26,6 +27,7 @@ returns the square of the argument
 For example sqr(3) -> 9.
 </description>
 <points>1</points>
+<language>python</language>
 <test>
 import math
 assert sqr(3) == 9