Move rietveld local server setup in a separate file.

git_cl/test/local_rietveld.py

+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Setups a local Rietveld instance to test against a live server for
+integration tests.
+
+It makes sure Google AppEngine SDK is found, download Rietveld and Django code
+if necessary and starts the server on a free inbound TCP port.
+"""
+
+import os
+import socket
+import subprocess
+import time
+
+
+class Failure(Exception):
+    pass
+
+
+def test_port(port):
+    s = socket.socket()
+    try:
+        return s.connect_ex(('127.0.0.1', port)) == 0
+    finally:
+        s.close()
+
+
+def find_free_port():
+    # Test to find an available port starting at 8080.
+    port = 8080
+    max_val = (2<<16)
+    while test_port(port) and port < max_val:
+        port += 1
+    if port == max_val:
+        raise Failure('Having issues finding an available port')
+    return port
+
+
+class LocalRietveld(object):
+    """Downloads everything needed to run a local instance of Rietveld."""
+
+    def __init__(self, base_dir=None):
+        # Paths
+        self.base_dir = base_dir
+        if not self.base_dir:
+            self.base_dir = os.path.dirname(os.path.abspath(__file__))
+            self.base_dir = os.path.realpath(os.path.join(self.base_dir, '..'))
+        self.sdk_path = os.path.abspath(
+            os.path.join(self.base_dir, '..', '..', 'google_appengine'))
+        self.dev_app = os.path.join(self.sdk_path, 'dev_appserver.py')
+        self.rietveld = os.path.join(self.base_dir, 'test', 'rietveld')
+        self.django_path = os.path.join(self.rietveld, 'django')
+        self.test_server = None
+        self.port = None
+        # Generate a friendly environment.
+        self.env = os.environ.copy()
+        self.env['LANGUAGE'] = 'en'
+        if self.env.get('PYTHONPATH'):
+            self.env['PYTHONPATH'] = (
+                self.env['PYTHONPATH'].rstrip(os.pathsep) + os.pathsep +
+                self.django_path)
+        else:
+            self.env['PYTHONPATH'] = self.django_path
+
+    def install_prerequisites(self):
+        # First, verify the Google AppEngine SDK is available.
+        if not os.path.isfile(self.dev_app):
+            raise Failure('Install google_appengine sdk in %s' % self.sdk_path)
+
+        def call(*args, **kwargs):
+            kwargs['env'] = self.env
+            x = subprocess.Popen(*args, **kwargs)
+            x.communicate()
+            return x.returncode == 0
+
+        # Second, checkout rietveld and django if not available.
+        if not os.path.isdir(self.rietveld):
+            print('Checking out rietveld...')
+            if not call(
+                ['svn', 'co', '-q',
+                    'http://rietveld.googlecode.com/svn/trunk@563',
+                    self.rietveld]):
+                raise Failure('Failed to checkout rietveld')
+        if not os.path.isdir(self.django_path):
+            print('Checking out django...')
+            if not call(
+                ['svn', 'co', '-q',
+                    'http://code.djangoproject.com/'
+                        'svn/django/branches/releases/1.0.X/django@13637',
+                    self.django_path]):
+                raise Failure('Failed to checkout django')
+
+    def start_server(self, verbose=False):
+        self.install_prerequisites()
+        self.port = find_free_port()
+        if verbose:
+            stdout = None
+            stderr = None
+        else:
+            stdout = subprocess.PIPE
+            stderr = subprocess.PIPE
+        output = []
+        self.test_server = subprocess.Popen(
+            [self.dev_app, self.rietveld, '--port=%d' % self.port,
+            '--datastore_path=' + os.path.join(self.rietveld, 'tmp.db'), '-c'],
+            stdout=stdout, stderr=stderr, env=self.env)
+        # Loop until port 127.0.0.1:port opens or the process dies.
+        while not test_port(self.port):
+            self.test_server.poll()
+            if self.test_server.returncode is not None:
+                raise Failure(
+                    'Test rietveld instance failed early on port %s' %
+                    self.port)
+            time.sleep(0.001)
+
+    def stop_server(self):
+        if self.test_server:
+            self.test_server.kill()
+            self.test_server = None
+            self.port = None
+
+
+def main():
+    print LocalRietveld().start_server()
+
+
+if __name__ == '__main__':
+    main()
+
+# vim: ts=4:sw=4:tw=80:et: