Update makefile and test runner for CI

Makefile

+# These targets are not files
+.PHONY: contribute ci test i18n
+
 contribute:
 	# Create a sandbox installation for playing around with oscar.
 	python setup.py develop
 	sandbox/manage.py oscar_import_catalogue_images sandbox/data/books-images.tar.gz
 	sandbox/manage.py loaddata countries.json sandbox/fixtures/pages.json
 
+ci:
+	# Run continous tests and generate lint reports
+	python setup.py develop
+	pip install -r requirements.txt
+	#./runtests.py --with-coverage
+	pyflakes oscar | perl -ple "s/: /: [E] /" | grep -v migrations > violations.txt
+	pep8 --exclude="migrations" oscar | perl -ple 's/: [WE](\d+)/: [W$1]/' > violations.txt
+
 test:
 	./runtests.py
 

runtests.py

 
 if __name__ == '__main__':
     parser = OptionParser()
-    __, args = parser.parse_args()
+    parser.add_option('--with-coverage', dest='coverage', default=False,
+                      action='store_true')
+    parser.add_option('--with-xunit', dest='xunit', default=False,
+                      action='store_true')
+    options, args = parser.parse_args()
 
     # If no args, then use 'progressive' plugin to keep the screen real estate
     # used down to a minimum.  Otherwise, use the spec plugin
     nose_args = ['-s', '-x',
                  '--with-progressive' if not args else '--with-spec']
-    #nose_args.extend([
-    #    '--with-coverage', '--cover-package=oscar', '--cover-html',
-    #    '--cover-html-dir=htmlcov'])
+
+    if options.coverage:
+        # Nose automatically uses any options passed to runtests.py, which is
+        # why the coverage trigger uses '--with-coverage' and why we don't need
+        # to explicitly include it here.
+        nose_args.extend([
+            '--cover-package=oscar', '--cover-html',
+            '--cover-html-dir=htmlcov'])
     configure(nose_args)
     run_tests(*args)