Make google-java-format easier to use for non-chromium checkouts like R8

1. Use "codereview.settings" in addition to "buildtools" as the marker
   that identifies a project root.
2. Allow the presence of any .jar file to indicate the availability of
   google-java-format.
3. Do not pass --aosp when running google-java-format

Bug: 456461246
Change-Id: Id27b3c03f592a0ed73fb7a6b4dd662707a649166
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/7102758
Reviewed-by: Scott Lee <ddoman@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>

gclient_paths.py

@@ -80,7 +80,8 @@ def _GetPrimarySolutionPathInternal(cwd):
         return os.path.join(gclient_root, source_dir_name)
 
     # Some projects might not use .gclient. Try to see whether we're in a git
-    # checkout that contains a 'buildtools' subdir.
+    # checkout that contains a "buildtools" directory or "codereview.settings"
+    # file.
     top_dir = cwd
     try:
         top_dir = subprocess2.check_output(
@@ -90,7 +91,8 @@ def _GetPrimarySolutionPathInternal(cwd):
     except subprocess2.CalledProcessError:
         pass
 
-    if os.path.exists(os.path.join(top_dir, 'buildtools')):
+    if (os.path.exists(os.path.join(top_dir, 'codereview.settings'))
+            or os.path.exists(os.path.join(top_dir, 'buildtools'))):
         return top_dir
     return None
 

git_cl.py

@@ -6839,7 +6839,14 @@ def _RunGoogleJavaFormat(opts, paths, top_dir, diffs):
         print('google-java-format not found, skipping java formatting.')
         return 0
 
-    base_cmd = [tool, '--aosp']
+    base_cmd = [tool]
+    # The script now adds --aosp, but this shim is needed for the window where
+    # devs are using depot_tools that is newer than their chromium checkout.
+    # This can be remove after Dec 2025.
+    if os.path.exists(
+            os.path.join(os.path.dirname(tool), 'chromium-overrides.jar')):
+        base_cmd += ['--aosp']
+
     if not opts.diff:
         if opts.dry_run:
             base_cmd += ['--dry-run']

google_java_format.py

@@ -9,6 +9,7 @@ you sync Chrome. This script finds and runs the executable.
 """
 
 import gclient_paths
+import glob
 import os
 import subprocess
 import sys
@@ -24,19 +25,16 @@ def FindGoogleJavaFormat():
             # Make relative to solution root if not an absolute path.
             return os.path.join(primary_solution_path, override)
 
-        bin_path = os.path.join(primary_solution_path, 'third_party',
-                                'google-java-format', 'google-java-format')
-        cipd_path = os.path.join(primary_solution_path, 'third_party',
-                                 'google-java-format', 'cipd',
-                                 'google-java-format.jar')
+        bin_dir = os.path.join(primary_solution_path, 'third_party',
+                               'google-java-format')
+        bin_path = os.path.join(bin_dir, 'google-java-format')
+
         # Check that the .jar exists, since it is conditionally downloaded via
         # DEPS conditions.
-        # TODO(b/345761161): Remove old os.path.exists(path + '.jar') check,
-        # when third_party/google-java-format
-        #     -> third_party/google-java-format/cipd is fully rolled out.
-        if os.path.exists(bin_path) and (os.path.exists(bin_path + '.jar')
-                                         or os.path.exists(cipd_path)):
-            return bin_path
+        if os.path.exists(bin_path):
+            if glob.glob(os.path.join(bin_dir, '*.jar')) or glob.glob(
+                    os.path.join(bin_dir, 'cipd', '*.jar')):
+                return bin_path
     return None