If a "prefix" option in borgmatic's configuration has an empty value (blank or ""), then disable default prefix.

NEWS

@@ -1,6 +1,9 @@
-1.3.13.dev0
+1.3.13
  * #199: Add note to documentation about using spaces instead of tabs for indentation, as YAML does
    not allow tabs.
+ * #203: Fix compatibility with ruamel.yaml 0.16.x.
+ * If a "prefix" option in borgmatic's configuration has an empty value (blank or ""), then disable
+   default prefix.
 
 1.3.12
  * Only log to syslog when run from a non-interactive console (e.g. a cron job).

borgmatic/borg/check.py

@@ -55,7 +55,7 @@ def _make_check_flags(checks, check_last=None, prefix=None):
     '''
     if 'archives' in checks:
         last_flags = ('--last', str(check_last)) if check_last else ()
-        prefix_flags = ('--prefix', prefix) if prefix else ('--prefix', DEFAULT_PREFIX)
+        prefix_flags = ('--prefix', prefix) if prefix else ()
     else:
         last_flags = ()
         prefix_flags = ()
@@ -102,7 +102,7 @@ def check_archives(
         if logger.isEnabledFor(logging.DEBUG):
             verbosity_flags = ('--debug', '--show-rc')
 
-        prefix = consistency_config.get('prefix')
+        prefix = consistency_config.get('prefix', DEFAULT_PREFIX)
 
         full_command = (
             (local_path, 'check', repository)

borgmatic/borg/prune.py

@@ -21,12 +21,15 @@ def _make_prune_flags(retention_config):
             ('--keep-monthly', '6'),
         )
     '''
-    if not retention_config.get('prefix'):
-        retention_config['prefix'] = '{hostname}-'
+    config = dict(retention_config)
+
+    if 'prefix' not in config:
+        config['prefix'] = '{hostname}-'
+    elif not config['prefix']:
+        config.pop('prefix')
 
     return (
-        ('--' + option_name.replace('_', '-'), str(retention_config[option_name]))
-        for option_name, value in retention_config.items()
+        ('--' + option_name.replace('_', '-'), str(value)) for option_name, value in config.items()
     )
 
 

borgmatic/config/schema.yaml

@@ -269,7 +269,7 @@ map:
                 desc: |
                     When pruning, only consider archive names starting with this prefix.
                     Borg placeholders can be used. See the output of "borg help placeholders" for
-                    details. Defaults to "{hostname}-".
+                    details. Defaults to "{hostname}-". Use an empty value to disable the default.
                 example: sourcehostname
     consistency:
         desc: |
@@ -311,7 +311,8 @@ map:
                 desc: |
                     When performing the "archives" check, only consider archive names starting with
                     this prefix. Borg placeholders can be used. See the output of
-                    "borg help placeholders" for details. Defaults to "{hostname}-".
+                    "borg help placeholders" for details. Defaults to "{hostname}-". Use an empty
+                    value to disable the default.
                 example: sourcehostname
     output:
         desc: |

setup.py

@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-VERSION = '1.3.13.dev0'
+VERSION = '1.3.13'
 
 
 setup(
@@ -31,7 +31,7 @@ setup(
     obsoletes=['atticmatic'],
     install_requires=(
         'pykwalify>=1.6.0,<14.06',
-        'ruamel.yaml>0.15.0,<0.16.0',
+        'ruamel.yaml>0.15.0,<0.17.0',
         'setuptools',
         'colorama>=0.4.1,<0.5',
     ),

test_requirements.txt

@@ -20,5 +20,5 @@ pytest==4.6.3
 pytest-cov==2.7.1
 python-dateutil==2.8.0
 PyYAML==5.1.1
-ruamel.yaml>0.15.0,<0.16.0
+ruamel.yaml>0.15.0,<0.17.0
 toml==0.10.0

tests/unit/borg/test_check.py

@@ -52,14 +52,14 @@ def test_make_check_flags_with_extract_omits_extract_flag():
     assert flags == ()
 
 
-def test_make_check_flags_with_default_checks_returns_default_flags():
-    flags = module._make_check_flags(module.DEFAULT_CHECKS)
+def test_make_check_flags_with_default_checks_and_default_prefix_returns_default_flags():
+    flags = module._make_check_flags(module.DEFAULT_CHECKS, prefix=module.DEFAULT_PREFIX)
 
     assert flags == ('--prefix', module.DEFAULT_PREFIX)
 
 
-def test_make_check_flags_with_all_checks_returns_default_flags():
-    flags = module._make_check_flags(module.DEFAULT_CHECKS + ('extract',))
+def test_make_check_flags_with_all_checks_and_default_prefix_returns_default_flags():
+    flags = module._make_check_flags(module.DEFAULT_CHECKS + ('extract',), prefix=module.DEFAULT_PREFIX)
 
     assert flags == ('--prefix', module.DEFAULT_PREFIX)
 
@@ -67,7 +67,7 @@ def test_make_check_flags_with_all_checks_returns_default_flags():
 def test_make_check_flags_with_archives_check_and_last_includes_last_flag():
     flags = module._make_check_flags(('archives',), check_last=3)
 
-    assert flags == ('--archives-only', '--last', '3', '--prefix', module.DEFAULT_PREFIX)
+    assert flags == ('--archives-only', '--last', '3')
 
 
 def test_make_check_flags_with_repository_check_and_last_omits_last_flag():
@@ -79,7 +79,7 @@ def test_make_check_flags_with_repository_check_and_last_omits_last_flag():
 def test_make_check_flags_with_default_checks_and_last_includes_last_flag():
     flags = module._make_check_flags(module.DEFAULT_CHECKS, check_last=3)
 
-    assert flags == ('--last', '3', '--prefix', module.DEFAULT_PREFIX)
+    assert flags == ('--last', '3')
 
 
 def test_make_check_flags_with_archives_check_and_prefix_includes_prefix_flag():
@@ -88,6 +88,18 @@ def test_make_check_flags_with_archives_check_and_prefix_includes_prefix_flag():
     assert flags == ('--archives-only', '--prefix', 'foo-')
 
 
+def test_make_check_flags_with_archives_check_and_empty_prefix_omits_prefix_flag():
+    flags = module._make_check_flags(('archives',), prefix='')
+
+    assert flags == ('--archives-only',)
+
+
+def test_make_check_flags_with_archives_check_and_none_prefix_omits_prefix_flag():
+    flags = module._make_check_flags(('archives',), prefix=None)
+
+    assert flags == ('--archives-only',)
+
+
 def test_make_check_flags_with_repository_check_and_prefix_omits_prefix_flag():
     flags = module._make_check_flags(('repository',), prefix='foo-')
 
@@ -114,7 +126,7 @@ def test_check_archives_calls_borg_with_parameters(checks):
     consistency_config = {'check_last': check_last}
     flexmock(module).should_receive('_parse_checks').and_return(checks)
     flexmock(module).should_receive('_make_check_flags').with_args(
-        checks, check_last, None
+        checks, check_last, module.DEFAULT_PREFIX
     ).and_return(())
     insert_execute_command_mock(('borg', 'check', 'repo'))
 
@@ -179,7 +191,7 @@ def test_check_archives_with_local_path_calls_borg_via_local_path():
     consistency_config = {'check_last': check_last}
     flexmock(module).should_receive('_parse_checks').and_return(checks)
     flexmock(module).should_receive('_make_check_flags').with_args(
-        checks, check_last, None
+        checks, check_last, module.DEFAULT_PREFIX
     ).and_return(())
     insert_execute_command_mock(('borg1', 'check', 'repo'))
 
@@ -197,7 +209,7 @@ def test_check_archives_with_remote_path_calls_borg_with_remote_path_parameters(
     consistency_config = {'check_last': check_last}
     flexmock(module).should_receive('_parse_checks').and_return(checks)
     flexmock(module).should_receive('_make_check_flags').with_args(
-        checks, check_last, None
+        checks, check_last, module.DEFAULT_PREFIX
     ).and_return(())
     insert_execute_command_mock(('borg', 'check', 'repo', '--remote-path', 'borg1'))
 
@@ -215,7 +227,7 @@ def test_check_archives_with_lock_wait_calls_borg_with_lock_wait_parameters():
     consistency_config = {'check_last': check_last}
     flexmock(module).should_receive('_parse_checks').and_return(checks)
     flexmock(module).should_receive('_make_check_flags').with_args(
-        checks, check_last, None
+        checks, check_last, module.DEFAULT_PREFIX
     ).and_return(())
     insert_execute_command_mock(('borg', 'check', 'repo', '--lock-wait', '5'))
 

tests/unit/borg/test_prune.py

@@ -33,6 +33,26 @@ def test_make_prune_flags_accepts_prefix_with_placeholders():
     assert tuple(result) == expected
 
 
+def test_make_prune_flags_treats_empty_prefix_as_no_prefix():
+    retention_config = OrderedDict((('keep_daily', 1), ('prefix', '')))
+
+    result = module._make_prune_flags(retention_config)
+
+    expected = (('--keep-daily', '1'),)
+
+    assert tuple(result) == expected
+
+
+def test_make_prune_flags_treats_none_prefix_as_no_prefix():
+    retention_config = OrderedDict((('keep_daily', 1), ('prefix', None)))
+
+    result = module._make_prune_flags(retention_config)
+
+    expected = (('--keep-daily', '1'),)
+
+    assert tuple(result) == expected
+
+
 PRUNE_COMMAND = (
     'borg',
     'prune',