ninjalog_uploader: Distinguish between explicit and default build configs

This CL adds `explicit_build_config_keys` to the metadata for the server
to distinguish between explicit and default configs.
This CL excludes the configs set in `//.gn` from the list, so that
the configs specified by users will be considered as explicit.

Bug: 364971744
Change-Id: I6a3d289d8ca6e054dac691051b53c92ad1ec23c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5853009
Commit-Queue: Junji Watanabe <jwata@google.com>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>

ninjalog_uploader.py

@@ -50,12 +50,16 @@ def ParseGNArgs(gn_args):
     """Parse gn_args as json and return config dictionary."""
     configs = json.loads(gn_args)
     build_configs = {}
+    explicit_keys = []
     user = getpass.getuser()
 
     for config in configs:
         key = config["name"]
         if "current" in config:
             value = config["current"]["value"]
+            # Record configs specified in args.gn as explicit configs.
+            if config["current"]["file"] != "//.gn":
+                explicit_keys.append(key)
         else:
             value = config["default"]["value"]
         value = value.strip('"')
@@ -68,7 +72,7 @@ def ParseGNArgs(gn_args):
             ])
         build_configs[key] = value
 
-    return build_configs
+    return build_configs, explicit_keys
 
 
 def GetBuildTargetFromCommandLine(cmdline):
@@ -132,15 +136,16 @@ def GetMetadata(cmdline, ninjalog, exit_code, build_duration, user):
     build_dir = os.path.dirname(ninjalog)
 
     build_configs = {}
+    explicit_keys = []
 
     try:
-        args = ["gn", "args", build_dir, "--list", "--short", "--json"]
+        args = ["gn", "args", build_dir, "--list", "--json"]
         if sys.platform == "win32":
             # gn in PATH is bat file in windows environment (except cygwin).
             args = ["cmd", "/c"] + args
 
         gn_args = subprocess.check_output(args)
-        build_configs = ParseGNArgs(gn_args)
+        build_configs, explicit_keys = ParseGNArgs(gn_args)
     except subprocess.CalledProcessError as e:
         logging.error("Failed to call gn %s", e)
         build_configs = {}
@@ -156,6 +161,7 @@ def GetMetadata(cmdline, ninjalog, exit_code, build_duration, user):
         "platform": platform.system(),
         "cpu_core": multiprocessing.cpu_count(),
         "build_configs": build_configs,
+        "explicit_build_config_keys": explicit_keys,
         "targets": GetBuildTargetFromCommandLine(cmdline),
     }
 

tests/ninjalog_uploader_test.py

@@ -18,15 +18,17 @@ import ninjalog_uploader
 class NinjalogUploaderTest(unittest.TestCase):
 
     def test_parse_gn_args(self):
-        self.assertEqual(ninjalog_uploader.ParseGNArgs(json.dumps([])), {})
+        gn_args, explicit_keys = ninjalog_uploader.ParseGNArgs(json.dumps([]))
+        self.assertEqual(gn_args, {})
+        self.assertEqual(explicit_keys, [])
 
         # Extract current configs from GN's output json.
-        self.assertEqual(
-            ninjalog_uploader.ParseGNArgs(
+        gn_args, explicit_keys = ninjalog_uploader.ParseGNArgs(
             json.dumps([
                 {
                     'current': {
-                            'value': 'true'
+                        'value': 'true',
+                        'file': '//path/to/args.gn',
                     },
                     'default': {
                         'value': 'false'
@@ -39,17 +41,20 @@ class NinjalogUploaderTest(unittest.TestCase):
                     },
                     'name': 'host_cpu'
                 },
-                ])), {
+            ]))
+
+        self.assertEqual(gn_args, {
             'is_component_build': 'true',
             'host_cpu': 'x64',
         })
+        self.assertEqual(explicit_keys, ['is_component_build'])
 
-        self.assertEqual(
-            ninjalog_uploader.ParseGNArgs(
+        gn_args, explicit_keys = ninjalog_uploader.ParseGNArgs(
             json.dumps([
                 {
                     'current': {
-                            'value': 'true'
+                        'value': 'true',
+                        'file': '//.gn',
                     },
                     'default': {
                         'value': 'false'
@@ -58,25 +63,29 @@ class NinjalogUploaderTest(unittest.TestCase):
                 },
                 {
                     'current': {
-                            'value': 'false'
+                        'value': 'false',
+                        'file': '//path/to/args.gn',
                     },
                     'default': {
                         'value': 'false'
                     },
                     'name': 'use_remoteexec'
                 },
-                ])), {
+            ]))
+        self.assertEqual(gn_args, {
             'is_component_build': 'true',
             'use_remoteexec': 'false'
         })
+        self.assertEqual(explicit_keys, ['use_remoteexec'])
 
         # Do not include sensitive information.
         with unittest.mock.patch('getpass.getuser', return_value='bob'):
-            args = ninjalog_uploader.ParseGNArgs(
+            gn_args, explicit_keys = ninjalog_uploader.ParseGNArgs(
                 json.dumps([
                     {
                         'current': {
-                            'value': 'xyz'
+                            'value': 'xyz',
+                            'file': '//path/to/args.gn',
                         },
                         'default': {
                             'value': ''
@@ -85,7 +94,8 @@ class NinjalogUploaderTest(unittest.TestCase):
                     },
                     {
                         'current': {
-                            'value': '/home/bob/bobo'
+                            'value': '/home/bob/bobo',
+                            'file': '//path/to/args.gn',
                         },
                         'default': {
                             'value': ''
@@ -94,7 +104,7 @@ class NinjalogUploaderTest(unittest.TestCase):
                     },
                 ]))
             self.assertEqual(
-                args, {
+                gn_args, {
                     'google_api_key': '<omitted>',
                     'path_with_homedir': '/home/$USER/bobo',
                 })