gclient: evaluate variables before passing them to GN

This helps make sure they have proper types (e.g. True
instead of "True" for booleans).

Also see https://chromium-review.googlesource.com/c/chromium/src/+/681854
for context.

Bug: 756688, 570091
Change-Id: I1e4d26df724e8e94cc3daba361191856f80a1b2c
Reviewed-on: https://chromium-review.googlesource.com/681705
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Paweł Hajdan Jr. <phajdan.jr@chromium.org>

gclient.py

@@ -959,8 +959,10 @@ class Dependency(gclient_utils.WorkItem, DependencySettings):
 
   def WriteGNArgsFile(self):
     lines = ['# Generated from %r' % self.deps_file]
+    variables = self.get_vars()
     for arg in self._gn_args:
-      lines.append('%s = %s' % (arg, ToGNString(self.get_vars()[arg])))
+      value = gclient_eval.EvaluateCondition(variables[arg], variables)
+      lines.append('%s = %s' % (arg, ToGNString(value)))
     with open(os.path.join(self.root.root_dir, self._gn_args_file), 'w') as f:
       f.write('\n'.join(lines))
 

testing_support/fake_repos.py

@@ -329,9 +329,16 @@ class FakeRepos(FakeReposBase):
       'DEPS': """
 vars = {
   'DummyVariable': 'repo',
+  'false_var': 'False',
+  'true_var': 'True',
+  'str_var': '"abc"',
 }
 gclient_gn_args_file = 'src/gclient.args'
-gclient_gn_args = ['DummyVariable']
+gclient_gn_args = [
+  'false_var',
+  'true_var',
+  'str_var',
+]
 deps = {
   'src/repo2': {
     'url': '%(git_base)srepo_2',
@@ -467,9 +474,19 @@ vars = {
   'git_base': '%(git_base)s',
   'hook1_contents': 'git_hooked1',
   'repo5_var': '/repo_5',
+
+  'false_var': 'False',
+  'true_var': 'True',
+  'str_var': '"abc"',
 }
+
 gclient_gn_args_file = 'src/gclient.args'
-gclient_gn_args = ['DummyVariable']
+gclient_gn_args = [
+  'false_var',
+  'true_var',
+  'str_var',
+]
+
 allowed_hosts = [
   '%(git_base)s',
 ]

tests/gclient_smoketest.py

@@ -326,7 +326,9 @@ class GClientSmokeGIT(GClientSmokeBase):
     tree['src/git_hooked2'] = 'git_hooked2'
     tree['src/gclient.args'] = '\n'.join([
         '# Generated from \'DEPS\'',
-        'DummyVariable = "repo"',
+        'false_var = false',
+        'true_var = true',
+        'str_var = "abc"',
     ])
     self.assertTree(tree)
     # Test incremental sync: delete-unversioned_trees isn't there.
@@ -342,7 +344,9 @@ class GClientSmokeGIT(GClientSmokeBase):
     tree['src/git_hooked2'] = 'git_hooked2'
     tree['src/gclient.args'] = '\n'.join([
         '# Generated from \'DEPS\'',
-        'DummyVariable = "repo"',
+        'false_var = false',
+        'true_var = true',
+        'str_var = "abc"',
     ])
     self.assertTree(tree)
 
@@ -379,7 +383,9 @@ class GClientSmokeGIT(GClientSmokeBase):
                                 ('repo_4@2', 'src/repo4'))
     tree['src/gclient.args'] = '\n'.join([
         '# Generated from \'DEPS\'',
-        'DummyVariable = "repo"',
+        'false_var = false',
+        'true_var = true',
+        'str_var = "abc"',
     ])
     self.assertTree(tree)
 
@@ -419,7 +425,9 @@ class GClientSmokeGIT(GClientSmokeBase):
     tree['src/git_hooked2'] = 'git_hooked2'
     tree['src/gclient.args'] = '\n'.join([
         '# Generated from \'DEPS\'',
-        'DummyVariable = "repo"',
+        'false_var = false',
+        'true_var = true',
+        'str_var = "abc"',
     ])
     self.assertTree(tree)
     # Test incremental sync: delete-unversioned_trees isn't there.
@@ -436,7 +444,9 @@ class GClientSmokeGIT(GClientSmokeBase):
     tree['src/git_hooked2'] = 'git_hooked2'
     tree['src/gclient.args'] = '\n'.join([
         '# Generated from \'DEPS\'',
-        'DummyVariable = "repo"',
+        'false_var = false',
+        'true_var = true',
+        'str_var = "abc"',
     ])
     self.assertTree(tree)
 
@@ -616,7 +626,7 @@ class GClientSmokeGIT(GClientSmokeBase):
     self.maxDiff = None
     self.assertEqual([
         'gclient_gn_args_file = "src/gclient.args"',
-        'gclient_gn_args = [\'DummyVariable\']',
+        'gclient_gn_args = [\'false_var\', \'true_var\', \'str_var\']',
         'allowed_hosts = [',
         '  "git://127.0.0.1:20000/git/",',
         ']',
@@ -738,6 +748,9 @@ class GClientSmokeGIT(GClientSmokeBase):
         '  "DummyVariable": \'repo\',',
         '',
         '  # src',
+        '  "false_var": \'False\',',
+        '',
+        '  # src',
         '  "git_base": \'git://127.0.0.1:20000/git/\',',
         '',
         '  # src',
@@ -746,6 +759,12 @@ class GClientSmokeGIT(GClientSmokeBase):
         '  # src',
         '  "repo5_var": \'/repo_5\',',
         '',
+        '  # src',
+        '  "str_var": \'"abc"\',',
+        '',
+        '  # src',
+        '  "true_var": \'True\',',
+        '',
         '}',
         '',
         '# git://127.0.0.1:20000/git/repo_2@%s, DEPS' % (
@@ -770,7 +789,7 @@ class GClientSmokeGIT(GClientSmokeBase):
 
     self.assertEqual([
         'gclient_gn_args_file = "src/gclient.args"',
-        'gclient_gn_args = [\'DummyVariable\']',
+        'gclient_gn_args = [\'false_var\', \'true_var\', \'str_var\']',
         'allowed_hosts = [',
         '  "git://127.0.0.1:20000/git/",',
         ']',
@@ -893,6 +912,9 @@ class GClientSmokeGIT(GClientSmokeBase):
         '  "DummyVariable": \'repo\',',
         '',
         '  # src',
+        '  "false_var": \'False\',',
+        '',
+        '  # src',
         '  "git_base": \'git://127.0.0.1:20000/git/\',',
         '',
         '  # src',
@@ -901,6 +923,12 @@ class GClientSmokeGIT(GClientSmokeBase):
         '  # src',
         '  "repo5_var": \'/repo_5\',',
         '',
+        '  # src',
+        '  "str_var": \'"abc"\',',
+        '',
+        '  # src',
+        '  "true_var": \'True\',',
+        '',
         '}',
         '',
         '# git://127.0.0.1:20000/git/repo_2@%s, DEPS' % (