[depot_tools] Update GCS dotfile naming

Sometimes the object name can have more than one dot like
20.11.0/f9a337cfa0e2b92d3e5c671c26b454bd8e99769e.
Currently, the dotfiles would be .20_.*
This change makes it so that the dotfiles would be
.20_11_0_f9a337cfa0e2b92d3e5c671c26b454bd8e99769e.*

Bug: b/328065301
Change-Id: I043a4b5fd56e48b046cfdc9a2fde3204b1bb638c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5491861
Reviewed-by: Joanna Wang <jojwang@chromium.org>
Commit-Queue: Stephanie Kim <kimstephanie@google.com>

download_from_google_storage.py

@@ -45,8 +45,8 @@ MIGRATION_TOGGLE_FILE_SUFFIX = '_is_first_class_gcs'
 def construct_migration_file_name(gcs_object_name):
     # Remove any forward slashes
     gcs_file_name = gcs_object_name.replace('/', '_')
-    # Remove any extensions
-    gcs_file_name = gcs_file_name.split('.')[0]
+    # Remove any dots
+    gcs_file_name = gcs_file_name.replace('.', '_')
 
     return f'.{gcs_file_name}{MIGRATION_TOGGLE_FILE_SUFFIX}'
 

gclient.py

@@ -2653,7 +2653,7 @@ class GcsDependency(Dependency):
                                    or f'.{gcs_file_name}')
 
         # Remove any forward slashes and drop any extensions
-        file_prefix = self.object_name.replace('/', '_').split('.')[0]
+        file_prefix = self.object_name.replace('/', '_').replace('.', '_')
         hash_file = os.path.join(output_dir, f'.{file_prefix}_hash')
         migration_toggle_file = os.path.join(
             output_dir,