Run coverage directly instead of as a plugin. Also quiet the install and clean steps of tests.

rakefile

@@ -49,12 +49,12 @@ default_options = {
 
 task :predjango do
     sh("find . -type f -name *.pyc -delete")
-    sh('pip install -e common/lib/xmodule -e common/lib/capa')
-    sh('git submodule update --init')
+    sh("pip install -q -e common/lib/xmodule -e common/lib/capa")
+    sh("git submodule update --init")
 end
 
 task :clean_test_files do
-    sh("git clean -fdx test_root")
+    sh("git clean -fqdx test_root")
 end
 
 [:lms, :cms, :common].each do |system|
@@ -84,11 +84,18 @@ end
 
 $failed_tests = 0
 
+def run_under_coverage(cmd)
+    cmd0, cmd_rest = cmd.split(" ", 2)
+    cmd = "coverage run `which #{cmd0}` #{cmd_rest}"
+    return cmd
+end
+
 def run_tests(system, report_dir, stop_on_failure=true)
     ENV['NOSE_XUNIT_FILE'] = File.join(report_dir, "nosetests.xml")
     ENV['NOSE_COVER_HTML_DIR'] = File.join(report_dir, "cover")
     dirs = Dir["common/djangoapps/*"] + Dir["#{system}/djangoapps/*"]
-    sh(django_admin(system, :test, 'test', *dirs.each)) do |ok, res|
+    cmd = django_admin(system, :test, 'test', '--logging-clear-handlers', *dirs.each)
+    sh(run_under_coverage(cmd)) do |ok, res|
         if !ok and stop_on_failure
             abort "Test failed!"
         end
@@ -152,7 +159,8 @@ Dir["common/lib/*"].each do |lib|
     desc "Run tests for common lib #{lib}"
     task task_name => report_dir do
         ENV['NOSE_XUNIT_FILE'] = File.join(report_dir, "nosetests.xml")
-        sh("nosetests #{lib} --cover-erase --with-xunit --with-xcoverage --cover-html --cover-inclusive --cover-package #{File.basename(lib)} --cover-html-dir #{File.join(report_dir, "cover")}")
+        cmd = "nosetests #{lib} --logging-clear-handlers --with-xunit"
+        sh(run_under_coverage(cmd))
     end
     TEST_TASKS << task_name