Add pylint testing to Travis

Author: theotherjimmy

.travis.yml

@@ -3,6 +3,7 @@ python:
 
 script:
   - PYTHONPATH=. python tools/test/config_test/config_test.py
+  - python tools/test/pylint.py
   - py.test tools/test/toolchains/api.py
   - python tools/build_travis.py
 before_install:
@@ -17,3 +18,4 @@ install:
   - sudo pip install prettytable
   - sudo pip install jinja2
   - sudo pip install pytest
+  - sudo pip install pylint

tools/test/pylint.py

@@ -0,0 +1,49 @@
+"""A test that all code scores above an 8.5 in pylint"""
+
+import subprocess
+import re
+import os.path
+import sys
+
+SCORE_REGEXP = re.compile(
+    r'^Your\ code\ has\ been\ rated\ at\ (\-?[0-9\.]+)/10')
+
+TOOLS_ROOT = os.path.dirname(os.path.dirname(__file__))
+
+
+def parse_score(pylint_output):
+    """Parse the score out of pylint's output as a float If the score is not
+    found, return 0.0.
+    """
+    for line in pylint_output.splitlines():
+        match = re.match(SCORE_REGEXP, line)
+        if match:
+            return float(match.group(1))
+    return 0.0
+
+def execute_pylint(filename):
+    """Execute a pylint process and collect it's output
+    """
+    process = subprocess.Popen(
+        ["pylint", filename],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE
+    )
+    stout, sterr = process.communicate()
+    status = process.poll()
+    return status, stout, sterr
+
+FILES = ["build_api.py", "config.py", "colorize.py", "detect_targets.py",
+         "hooks.py", "libraries.py", "memap.py", "options.py", "paths.py",
+         "targets.py", "test/pylint.py"]
+
+if __name__ == "__main__":
+    for python_module in FILES:
+        _, stdout, stderr = execute_pylint(os.path.join(TOOLS_ROOT,
+                                                        python_module))
+        if parse_score(stdout) < 8.5:
+            print(stdout)
+            sys.exit(1)
+
+
+