Auto-detect account regional namespace buckets in s3 mb and set BucketNamespace header

Author: AndrewAsseily

awscli/customizations/s3/subcommands.py

@@ -31,7 +31,7 @@
 from awscli.customizations.s3.utils import find_bucket_key, AppendFilter, \
     find_dest_path_comp_key, human_readable_size, \
     RequestParamsMapper, split_s3_bucket_key, block_unsupported_resources, \
-    S3PathResolver
+    S3PathResolver, is_account_regional_namespace_bucket
 from awscli.customizations.utils import uni_print
 from awscli.customizations.s3.syncstrategy.base import MissingFileSync, \
     SizeAndLastModifiedSync, NeverSync, AlwaysSync
@@ -910,6 +910,9 @@ def _run_main(self, parsed_args, parsed_globals):
         bucket_config = {}
         bucket_tags = self._create_bucket_tags(parsed_args)
 
+        if is_account_regional_namespace_bucket(bucket):
+            params['BucketNamespace'] = 'account-regional'
+
         # Only set LocationConstraint when the region name is not us-east-1.
         # Sending LocationConstraint with value us-east-1 results in an error.
         if self.client.meta.region_name != 'us-east-1':

awscli/customizations/s3/utils.py

@@ -58,12 +58,20 @@
     r'[a-zA-Z0-9\-]{1,63})[/:]?(?P<key>.*)$'
 )
 
+_S3_ACCOUNT_REGIONAL_NAMESPACE_REGEX = re.compile(
+    r'^.+-\d{12}-[a-z]{2}(-[a-z]+-\d+)?-an$'
+)
+
 _S3_OBJECT_LAMBDA_TO_BUCKET_KEY_REGEX = re.compile(
     r'^(?P<bucket>arn:(aws).*:s3-object-lambda:[a-z\-0-9]+:[0-9]{12}:'
     r'accesspoint[/:][a-zA-Z0-9\-]{1,63})[/:]?(?P<key>.*)$'
 )
 
 
+def is_account_regional_namespace_bucket(bucket):
+    return bool(_S3_ACCOUNT_REGIONAL_NAMESPACE_REGEX.match(bucket))
+
+
 def human_readable_size(value):
     """Convert a size in bytes into a human readable format.