Add "borgmatic extract --strip-components" flag to remove leading path components when extracting an archive (#324).

NEWS

@@ -7,6 +7,8 @@
    disk.
  * #323: Fix for certain configuration options like ssh_command impacting Borg invocations for
    separate configuration files.
+ * #324: Add "borgmatic extract --strip-components" flag to remove leading path components when
+   extracting an archive.
  * Tweak comment indentation in generated configuration file for clarity.
  * Link to Borgmacator GNOME AppIndicator from monitoring documentation.
 

borgmatic/borg/extract.py

@@ -64,6 +64,7 @@ def extract_archive(
     local_path='borg',
     remote_path=None,
     destination_path=None,
+    strip_components=None,
     progress=False,
     extract_to_stdout=False,
 ):
@@ -91,6 +92,7 @@ def extract_archive(
         + (('--info',) if logger.getEffectiveLevel() == logging.INFO else ())
         + (('--debug', '--list', '--show-rc') if logger.isEnabledFor(logging.DEBUG) else ())
         + (('--dry-run',) if dry_run else ())
+        + (('--strip-components', str(strip_components)) if strip_components else ())
         + (('--progress',) if progress else ())
         + (('--stdout',) if extract_to_stdout else ())
         + ('::'.join((repository if ':' in repository else os.path.abspath(repository), archive)),)

borgmatic/commands/arguments.py

@@ -340,6 +340,13 @@ def parse_arguments(*unparsed_arguments):
         dest='destination',
         help='Directory to extract files into, defaults to the current directory',
     )
+    extract_group.add_argument(
+        '--strip-components',
+        type=int,
+        metavar='NUMBER',
+        dest='strip_components',
+        help='Number of leading path components to remove from each extracted path. Skip paths with fewer elements',
+    )
     extract_group.add_argument(
         '--progress',
         dest='progress',

borgmatic/commands/borgmatic.py

@@ -328,6 +328,7 @@ def run_actions(
                 local_path=local_path,
                 remote_path=remote_path,
                 destination_path=arguments['extract'].destination,
+                strip_components=arguments['extract'].strip_components,
                 progress=arguments['extract'].progress,
             )
     if 'mount' in arguments:

tests/unit/borg/test_environment.py

@@ -62,7 +62,7 @@ def test_initialize_with_relocated_repo_access_should_override_default():
         os.environ = orig_environ
 
 
-def test_initialize_is_not_effected_by_existing_environment():
+def test_initialize_is_not_affected_by_existing_environment():
     orig_environ = os.environ
 
     try:

tests/unit/borg/test_extract.py

@@ -220,6 +220,21 @@ def test_extract_archive_calls_borg_with_destination_path():
     )
 
 
+def test_extract_archive_calls_borg_with_strip_components():
+    flexmock(module.os.path).should_receive('abspath').and_return('repo')
+    insert_execute_command_mock(('borg', 'extract', '--strip-components', '5', 'repo::archive'))
+
+    module.extract_archive(
+        dry_run=False,
+        repository='repo',
+        archive='archive',
+        paths=None,
+        location_config={},
+        storage_config={},
+        strip_components=5,
+    )
+
+
 def test_extract_archive_calls_borg_with_progress_parameter():
     flexmock(module.os.path).should_receive('abspath').and_return('repo')
     flexmock(module).should_receive('execute_command').with_args(