Reland "[gclient] Make getdep and setdep to provide builtin vars"

This is a reland of 5705acabe0

If a gclient config is not found, then built-in variables wont
be supported.

Original change's description:
> [gclient] Make getdep and setdep to provide builtin vars
>
> Bug: 906114
> Change-Id: I069cc21343911f7fdb3c91ecbd8fcba53fc8099f
> Reviewed-on: https://chromium-review.googlesource.com/c/1340461
> Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
> Commit-Queue: Eric Boren <borenet@chromium.org>

Bug: 906114
Change-Id: I72f30d10b5f0180fd5c616a42393f5b12055ce8e
Reviewed-on: https://chromium-review.googlesource.com/c/1341039
Reviewed-by: Eric Boren <borenet@chromium.org>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

gclient.py

@@ -2814,7 +2814,7 @@ def CMDgetdep(parser, args):
                     dest='vars', metavar='VAR', default=[],
                     help='Gets the value of a given variable.')
   parser.add_option('-r', '--revision', action='append',
-                    dest='revisions', metavar='DEP', default=[],
+                    dest='getdep_revisions', metavar='DEP', default=[],
                     help='Gets the revision/version for the given dependency. '
                          'If it is a git dependency, dep must be a path. If it '
                          'is a CIPD dependency, dep must be of the form '
@@ -2831,12 +2831,21 @@ def CMDgetdep(parser, args):
         'DEPS file %s does not exist.' % options.deps_file)
   with open(options.deps_file) as f:
     contents = f.read()
-  local_scope = gclient_eval.Exec(contents, options.deps_file)
+  client = GClient.LoadCurrentConfig(options)
+  if client is not None:
+    builtin_vars = client.get_builtin_vars()
+  else:
+    logging.warn(
+        'Couldn\'t find a valid gclient config. Will attempt to parse the DEPS '
+        'file without support for built-in variables.')
+    builtin_vars = None
+  local_scope = gclient_eval.Exec(contents, options.deps_file,
+                                  builtin_vars=builtin_vars)
 
   for var in options.vars:
     print(gclient_eval.GetVar(local_scope, var))
 
-  for name in options.revisions:
+  for name in options.getdep_revisions:
     if ':' in name:
       name, _, package = name.partition(':')
       if not name or not package:
@@ -2856,7 +2865,7 @@ def CMDsetdep(parser, args):
                     help='Sets a variable to the given value with the format '
                          'name=value.')
   parser.add_option('-r', '--revision', action='append',
-                    dest='revisions', metavar='DEP@REV', default=[],
+                    dest='setdep_revisions', metavar='DEP@REV', default=[],
                     help='Sets the revision/version for the dependency with '
                          'the format dep@rev. If it is a git dependency, dep '
                          'must be a path and rev must be a git hash or '
@@ -2881,7 +2890,18 @@ def CMDsetdep(parser, args):
         'DEPS file %s does not exist.' % options.deps_file)
   with open(options.deps_file) as f:
     contents = f.read()
-  local_scope = gclient_eval.Exec(contents, options.deps_file)
+
+  client = GClient.LoadCurrentConfig(options)
+  if client is not None:
+    builtin_vars = client.get_builtin_vars()
+  else:
+    logging.warn(
+        'Couldn\'t find a valid gclient config. Will attempt to parse the DEPS '
+        'file without support for built-in variables.')
+    builtin_vars = None
+
+  local_scope = gclient_eval.Exec(contents, options.deps_file,
+                                  builtin_vars=builtin_vars)
 
   for var in options.vars:
     name, _, value = var.partition('=')
@@ -2893,7 +2913,7 @@ def CMDsetdep(parser, args):
     else:
       gclient_eval.AddVar(local_scope, name, value)
 
-  for revision in options.revisions:
+  for revision in options.setdep_revisions:
     name, _, value = revision.partition('@')
     if not name or not value:
       parser.error(

tests/gclient_smoketest.py

@@ -903,7 +903,52 @@ class GClientSmokeGIT(GClientSmokeBase):
     with open(fake_deps) as f:
       contents = f.read().splitlines()
 
-    self.assertEqual('', results[1])
+    self.assertEqual('', results[1], results[1])
+    self.assertEqual(0, results[2])
+    self.assertEqual([
+          'vars = { ',
+          '  "foo_var": "new_val",',
+          '  "foo_rev": "new_foo",',
+          '}',
+          'deps = {',
+          '  "foo": {',
+          '    "url": "url@{foo_rev}",',
+          '  },',
+          '  "bar": "url@new_bar",',
+          '}',
+    ], contents)
+
+  def testSetDep_BuiltinVariables(self):
+    self.gclient(['config', self.git_base + 'repo_1', '--name', 'src'])
+    fake_deps = os.path.join(self.root_dir, 'DEPS.fake')
+    with open(fake_deps, 'w') as f:
+      f.write('\n'.join([
+          'vars = { ',
+          '  "foo_var": "foo_val",',
+          '  "foo_rev": "foo_rev",',
+          '}',
+          'deps = {',
+          '  "foo": {',
+          '    "url": "url@{foo_rev}",',
+          '  },',
+          '  "bar": "url@bar_rev",',
+          '}',
+          'hooks = [{',
+          '  "name": "uses_builtin_var",',
+          '  "pattern": ".",',
+          '  "action": ["python", "fake.py",',
+          '             "--with-android={checkout_android}"],',
+          '}]',
+      ]))
+
+    results = self.gclient([
+        'setdep', '-r', 'foo@new_foo', '-r', 'bar@new_bar',
+        '--var', 'foo_var=new_val', '--deps-file', fake_deps])
+
+    with open(fake_deps) as f:
+      contents = f.read().splitlines()
+
+    self.assertEqual('', results[1], results[1])
     self.assertEqual(0, results[2])
     self.assertEqual([
           'vars = { ',
@@ -916,6 +961,12 @@ class GClientSmokeGIT(GClientSmokeBase):
           '  },',
           '  "bar": "url@new_bar",',
           '}',
+          'hooks = [{',
+          '  "name": "uses_builtin_var",',
+          '  "pattern": ".",',
+          '  "action": ["python", "fake.py",',
+          '             "--with-android={checkout_android}"],',
+          '}]',
     ], contents)
 
   def testGetDep(self):
@@ -946,6 +997,41 @@ class GClientSmokeGIT(GClientSmokeBase):
     ], results[0].splitlines())
     self.assertEqual(0, results[2])
 
+  def testGetDep_BuiltinVariables(self):
+    self.gclient(['config', self.git_base + 'repo_1', '--name', 'src'])
+    fake_deps = os.path.join(self.root_dir, 'DEPS.fake')
+    with open(fake_deps, 'w') as f:
+      f.write('\n'.join([
+          'vars = { ',
+          '  "foo_var": "foo_val",',
+          '  "foo_rev": "foo_rev",',
+          '}',
+          'deps = {',
+          '  "foo": {',
+          '    "url": "url@{foo_rev}",',
+          '  },',
+          '  "bar": "url@bar_rev",',
+          '}',
+          'hooks = [{',
+          '  "name": "uses_builtin_var",',
+          '  "pattern": ".",',
+          '  "action": ["python", "fake.py",',
+          '             "--with-android={checkout_android}"],',
+          '}]',
+      ]))
+
+    results = self.gclient([
+        'getdep', '-r', 'foo', '-r', 'bar','--var', 'foo_var',
+        '--deps-file', fake_deps])
+
+    self.assertEqual('', results[1])
+    self.assertEqual([
+        'foo_val',
+        'foo_rev',
+        'bar_rev',
+    ], results[0].splitlines())
+    self.assertEqual(0, results[2])
+
   def testFlatten(self):
     if not self.enabled:
       return