Add recursion=n syntax to DEPS files.

tests/gclient_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Unit tests for gclient.py.
 
 See gclient_smoketest.py for integration tests.
 """
 
@@ skipping 288 matching lines @@
         '  "unix": { "foo/dir2": "/dir2", },\n'
         '  "baz": { "foo/dir3": "/dir3", },\n'
         '}')
 
     parser = gclient.Parser()
     options, _ = parser.parse_args(['--jobs', '1'])
     options.deps_os = "unix"
 
     obj = gclient.GClient.LoadCurrentConfig(options)
     self.assertEqual(['baz', 'unix'], sorted(obj.enforced_os))
-    
+
+  def testRecursionOverride(self):
+    """Verifies gclient respects the recursion var syntax.
+
+    We check several things here:
+    - recursion = 3 sets recursion on the foo dep to exactly 3
+      (we pull /fizz, but not /fuzz)
+    - pulling foo/bar at recursion level 1 (in .gclient) is overriden by
+      a later pull of foo/bar at recursion level 2 (in the dep tree)
+    """
+    write(
+        '.gclient',
+        'solutions = [\n'
+        '  { "name": "foo", "url": "svn://example.com/foo" },\n'
+        '  { "name": "foo/bar", "url": "svn://example.com/bar" },\n'
+          ']')
+    write(
+        os.path.join('foo', 'DEPS'),
+        'deps = {\n'
+        '  "bar": "/bar",\n'
+        '}\n'
+        'recursion = 3')
+    write(
+        os.path.join('bar', 'DEPS'),
+        'deps = {\n'
+        '  "baz": "/baz",\n'
+        '}')
+    write(
+        os.path.join('baz', 'DEPS'),
+        'deps = {\n'
+        '  "fizz": "/fizz",\n'
+        '}')
+    write(
+        os.path.join('fizz', 'DEPS'),
+        'deps = {\n'
+        '  "fuzz": "/fuzz",\n'
+        '}')
+
+    options, _ = gclient.Parser().parse_args([])
+    obj = gclient.GClient.LoadCurrentConfig(options)
+    obj.RunOnDeps('None', [])
+    self.assertEquals(
+        [
+          'svn://example.com/foo',
+          'svn://example.com/bar',
+          'svn://example.com/foo/bar',
+          'svn://example.com/foo/bar/baz',
+          'svn://example.com/foo/bar/baz/fizz',
+        ],
+        self._get_processed())
+
 
 if __name__ == '__main__':
   sys.stdout = gclient_utils.MakeFileAutoFlush(sys.stdout)
   sys.stdout = gclient_utils.MakeFileAnnotated(sys.stdout, include_zero=True)
   sys.stderr = gclient_utils.MakeFileAutoFlush(sys.stderr)
   sys.stderr = gclient_utils.MakeFileAnnotated(sys.stderr, include_zero=True)
   logging.basicConfig(
       level=[logging.ERROR, logging.WARNING, logging.INFO, logging.DEBUG][
         min(sys.argv.count('-v'), 3)],
       format='%(relativeCreated)4d %(levelname)5s %(module)13s('
               '%(lineno)d) %(message)s')
   unittest.main()