Bump version for release.

These are currently not being used in the call to `borg info` performed
as part of the borgmatic init command to check whether or not the repo
already exists.

NEWS

@@ -1,3 +1,17 @@
+1.4.21
+ * #268: Override particular configuration options from the command-line via "--override" flag. See
+   the documentation for more information:
+   https://torsion.org/borgmatic/docs/how-to/make-per-application-backups/#configuration-overrides
+ * #270: Only trigger "on_error" hooks and monitoring failures for "prune", "create", and "check"
+   actions, and not for other actions.
+ * When pruning with verbosity level 1, list pruned and kept archives. Previously, this information
+   was only shown at verbosity level 2.
+
+1.4.20
+ * Fix repository probing during "borgmatic init" to respect verbosity flag and remote_path option.
+ * #249: Update Healthchecks/Cronitor/Cronhub monitoring integrations to fire for "check" and
+   "prune" actions, not just "create".
+
 1.4.19
  * #259: Optionally change the internal database dump path via "borgmatic_source_directory" option
    in location configuration section.

borgmatic/borg/init.py

@@ -23,7 +23,13 @@ def initialize_repository(
     whether the repository should be append-only, and the storage quota to use, initialize the
     repository. If the repository already exists, then log and skip initialization.
     '''
-    info_command = (local_path, 'info', repository)
+    info_command = (
+        (local_path, 'info')
+        + (('--info',) if logger.getEffectiveLevel() == logging.INFO else ())
+        + (('--debug',) if logger.isEnabledFor(logging.DEBUG) else ())
+        + (('--remote-path', remote_path) if remote_path else ())
+        + (repository,)
+    )
     logger.debug(' '.join(info_command))
 
     try:

borgmatic/borg/prune.py

@@ -58,7 +58,7 @@ def prune_archives(
         + (('--umask', str(umask)) if umask else ())
         + (('--lock-wait', str(lock_wait)) if lock_wait else ())
         + (('--stats',) if not dry_run and logger.isEnabledFor(logging.INFO) else ())
-        + (('--info',) if logger.getEffectiveLevel() == logging.INFO else ())
+        + (('--info', '--list') if logger.getEffectiveLevel() == logging.INFO else ())
         + (('--debug', '--list', '--show-rc') if logger.isEnabledFor(logging.DEBUG) else ())
         + (('--dry-run',) if dry_run else ())
         + (('--stats',) if stats else ())

borgmatic/commands/arguments.py

@@ -164,6 +164,13 @@ def parse_arguments(*unparsed_arguments):
         default=None,
         help='Write log messages to this file instead of syslog',
     )
+    global_group.add_argument(
+        '--override',
+        metavar='SECTION.OPTION=VALUE',
+        nargs='+',
+        dest='overrides',
+        help='One or more configuration file options to override with specified values',
+    )
     global_group.add_argument(
         '--version',
         dest='version',

borgmatic/commands/borgmatic.py

@@ -52,9 +52,10 @@ def run_configuration(config_filename, config, arguments):
     borg_environment.initialize(storage)
     encountered_error = None
     error_repository = ''
+    prune_create_or_check = {'prune', 'create', 'check'}.intersection(arguments)
 
-    if 'create' in arguments:
-        try:
+    try:
+        if prune_create_or_check:
             dispatch.call_hooks(
                 'ping_monitor',
                 hooks,
@@ -63,6 +64,7 @@ def run_configuration(config_filename, config, arguments):
                 monitor.State.START,
                 global_arguments.dry_run,
             )
+        if 'create' in arguments:
             command.execute_hook(
                 hooks.get('before_backup'),
                 hooks.get('umask'),
@@ -78,11 +80,11 @@ def run_configuration(config_filename, config, arguments):
                 location,
                 global_arguments.dry_run,
             )
-        except (OSError, CalledProcessError) as error:
-            encountered_error = error
-            yield from make_error_log_records(
-                '{}: Error running pre-backup hook'.format(config_filename), error
-            )
+    except (OSError, CalledProcessError) as error:
+        encountered_error = error
+        yield from make_error_log_records(
+            '{}: Error running pre-backup hook'.format(config_filename), error
+        )
 
     if not encountered_error:
         for repository_path in location['repositories']:
@@ -105,38 +107,40 @@ def run_configuration(config_filename, config, arguments):
                     '{}: Error running actions for repository'.format(repository_path), error
                 )
 
-    if 'create' in arguments and not encountered_error:
+    if not encountered_error:
         try:
-            dispatch.call_hooks(
-                'remove_database_dumps',
-                hooks,
-                config_filename,
-                dump.DATABASE_HOOK_NAMES,
-                location,
-                global_arguments.dry_run,
-            )
-            command.execute_hook(
-                hooks.get('after_backup'),
-                hooks.get('umask'),
-                config_filename,
-                'post-backup',
-                global_arguments.dry_run,
-            )
-            dispatch.call_hooks(
-                'ping_monitor',
-                hooks,
-                config_filename,
-                monitor.MONITOR_HOOK_NAMES,
-                monitor.State.FINISH,
-                global_arguments.dry_run,
-            )
+            if 'create' in arguments:
+                dispatch.call_hooks(
+                    'remove_database_dumps',
+                    hooks,
+                    config_filename,
+                    dump.DATABASE_HOOK_NAMES,
+                    location,
+                    global_arguments.dry_run,
+                )
+                command.execute_hook(
+                    hooks.get('after_backup'),
+                    hooks.get('umask'),
+                    config_filename,
+                    'post-backup',
+                    global_arguments.dry_run,
+                )
+            if {'prune', 'create', 'check'}.intersection(arguments):
+                dispatch.call_hooks(
+                    'ping_monitor',
+                    hooks,
+                    config_filename,
+                    monitor.MONITOR_HOOK_NAMES,
+                    monitor.State.FINISH,
+                    global_arguments.dry_run,
+                )
         except (OSError, CalledProcessError) as error:
             encountered_error = error
             yield from make_error_log_records(
                 '{}: Error running post-backup hook'.format(config_filename), error
             )
 
-    if encountered_error:
+    if encountered_error and prune_create_or_check:
         try:
             command.execute_hook(
                 hooks.get('on_error'),
@@ -369,7 +373,7 @@ def run_actions(
                 yield json.loads(json_output)
 
 
-def load_configurations(config_filenames):
+def load_configurations(config_filenames, overrides=None):
     '''
     Given a sequence of configuration filenames, load and validate each configuration file. Return
     the results as a tuple of: dict of configuration filename to corresponding parsed configuration,
@@ -383,7 +387,7 @@ def load_configurations(config_filenames):
     for config_filename in config_filenames:
         try:
             configs[config_filename] = validate.parse_configuration(
-                config_filename, validate.schema_filename()
+                config_filename, validate.schema_filename(), overrides
             )
         except (ValueError, OSError, validate.Validation_error) as error:
             logs.extend(
@@ -581,7 +585,7 @@ def main():  # pragma: no cover
         sys.exit(0)
 
     config_filenames = tuple(collect.collect_config_filenames(global_arguments.config_paths))
-    configs, parse_logs = load_configurations(config_filenames)
+    configs, parse_logs = load_configurations(config_filenames, global_arguments.overrides)
 
     colorama.init(autoreset=True, strip=not should_do_markup(global_arguments.no_color, configs))
     try:

borgmatic/config/override.py

@@ -0,0 +1,71 @@
+import io
+
+import ruamel.yaml
+
+
+def set_values(config, keys, value):
+    '''
+    Given a hierarchy of configuration dicts, a sequence of parsed key strings, and a string value,
+    descend into the hierarchy based on the keys to set the value into the right place.
+    '''
+    if not keys:
+        return
+
+    first_key = keys[0]
+    if len(keys) == 1:
+        config[first_key] = value
+        return
+
+    if first_key not in config:
+        config[first_key] = {}
+
+    set_values(config[first_key], keys[1:], value)
+
+
+def convert_value_type(value):
+    '''
+    Given a string value, determine its logical type (string, boolean, integer, etc.), and return it
+    converted to that type.
+    '''
+    return ruamel.yaml.YAML(typ='safe').load(io.StringIO(value))
+
+
+def parse_overrides(raw_overrides):
+    '''
+    Given a sequence of configuration file override strings in the form of "section.option=value",
+    parse and return a sequence of tuples (keys, values), where keys is a sequence of strings. For
+    instance, given the following raw overrides:
+
+        ['section.my_option=value1', 'section.other_option=value2']
+
+    ... return this:
+
+        (
+            (('section', 'my_option'), 'value1'),
+            (('section', 'other_option'), 'value2'),
+        )
+
+    Raise ValueError if an override can't be parsed.
+    '''
+    if not raw_overrides:
+        return ()
+
+    try:
+        return tuple(
+            (tuple(raw_keys.split('.')), convert_value_type(value))
+            for raw_override in raw_overrides
+            for raw_keys, value in (raw_override.split('=', 1),)
+        )
+    except ValueError:
+        raise ValueError('Invalid override. Make sure you use the form: SECTION.OPTION=VALUE')
+
+
+def apply_overrides(config, raw_overrides):
+    '''
+    Given a sequence of configuration file override strings in the form of "section.option=value"
+    and a configuration dict, parse each override and set it the configuration dict.
+    '''
+    overrides = parse_overrides(raw_overrides)
+
+    for (keys, value) in overrides:
+        set_values(config, keys, value)

borgmatic/config/validate.py

@@ -6,7 +6,7 @@ import pykwalify.core
 import pykwalify.errors
 import ruamel.yaml
 
-from borgmatic.config import load
+from borgmatic.config import load, override
 
 
 def schema_filename():
@@ -82,11 +82,12 @@ def remove_examples(schema):
     return schema
 
 
-def parse_configuration(config_filename, schema_filename):
+def parse_configuration(config_filename, schema_filename, overrides=None):
     '''
-    Given the path to a config filename in YAML format and the path to a schema filename in
-    pykwalify YAML schema format, return the parsed configuration as a data structure of nested
-    dicts and lists corresponding to the schema. Example return value:
+    Given the path to a config filename in YAML format, the path to a schema filename in pykwalify
+    YAML schema format, a sequence of configuration file override strings in the form of
+    "section.option=value", return the parsed configuration as a data structure of nested dicts and
+    lists corresponding to the schema. Example return value:
 
        {'location': {'source_directories': ['/home', '/etc'], 'repository': 'hostname.borg'},
        'retention': {'keep_daily': 7}, 'consistency': {'checks': ['repository', 'archives']}}
@@ -102,6 +103,8 @@ def parse_configuration(config_filename, schema_filename):
     except (ruamel.yaml.error.YAMLError, RecursionError) as error:
         raise Validation_error(config_filename, (str(error),))
 
+    override.apply_overrides(config, overrides)
+
     validator = pykwalify.core.Core(source_data=config, schema_data=remove_examples(schema))
     parsed_result = validator.validate(raise_exception=False)
 

docs/_includes/components/suggestion-form.html

@@ -1,12 +1,12 @@
 <h2>Improve this documentation</h2>
 
 <p>Have an idea on how to make this documentation even better? Send your
-feedback below! (But if you need help installing or using borgmatic, please
-use our <a href="https://torsion.org/borgmatic/#issues">issue tracker</a>
-instead.)</p>
+feedback below! But if you need help with borgmatic, or have an idea for a
+borgmatic feature, please use our <a href="https://torsion.org/borgmatic/#issues">issue
+tracker</a> instead.</p>
 
 <form id="suggestion-form">
-    <div><label for="suggestion">Suggestion</label></div>
+    <div><label for="suggestion">Documentation suggestion</label></div>
     <textarea id="suggestion" rows="8" cols="60" name="suggestion"></textarea>
     <div data-sk-error="suggestion" class="form-error"></div>
     <input id="_page" type="hidden" name="_page">

docs/how-to/make-per-application-backups.md

@@ -22,6 +22,11 @@ When you set up multiple configuration files like this, borgmatic will run
 each one in turn from a single borgmatic invocation. This includes, by
 default, the traditional `/etc/borgmatic/config.yaml` as well.
 
+Each configuration file is interpreted independently, as if you ran borgmatic
+for each configuration file one at a time. In other words, borgmatic does not
+perform any merging of configuration files by default. If you'd like borgmatic
+to merge your configuration files, see below about configuration includes.
+
 And if you need even more customizability, you can specify alternate
 configuration paths on the command-line with borgmatic's `--config` option.
 See `borgmatic --help` for more information.
@@ -110,6 +115,40 @@ Note that this `<<` include merging syntax is only for merging in mappings
 directly, please see the section above about standard includes.
 
 
+## Configuration overrides
+
+In more complex multi-application setups, you may want to override particular
+borgmatic configuration file options at the time you run borgmatic. For
+instance, you could reuse a common configuration file for multiple
+applications, but then set the repository for each application at runtime. Or
+you might want to try a variant of an option for testing purposes without
+actually touching your configuration file.
+
+Whatever the reason, you can override borgmatic configuration options at the
+command-line via the `--override` flag. Here's an example:
+
+```bash
+borgmatic create --override location.remote_path=borg1
+```
+
+What this does is load your configuration files, and for each one, disregard
+the configured value for the `remote_path` option in the `location` section,
+and use the value of `borg1` instead.
+
+Note that the value is parsed as an actual YAML string, so you can even set
+list values by using brackets. For instance:
+
+```bash
+borgmatic create --override location.repositories=[test1.borg,test2.borg]
+```
+
+There is not currently a way to override a single element of a list without
+replacing the whole list.
+
+Be sure to quote your overrides if they contain spaces or other characters
+that your shell may interpret.
+
+
 ## Related documentation
 
  * [Set up backups with borgmatic](https://torsion.org/borgmatic/docs/how-to/set-up-backups/)

docs/how-to/monitor-your-backups.md

@@ -57,10 +57,10 @@ tests](https://torsion.org/borgmatic/docs/how-to/extract-a-backup/).
 
 ## Error hooks
 
-When an error occurs during a backup or another action, borgmatic can run
-configurable shell commands to fire off custom error notifications or take
-other actions, so you can get alerted as soon as something goes wrong. Here's
-a not-so-useful example:
+When an error occurs during a `prune`, `create`, or `check` action, borgmatic
+can run configurable shell commands to fire off custom error notifications or
+take other actions, so you can get alerted as soon as something goes wrong.
+Here's a not-so-useful example:
 
 ```yaml
 hooks:
@@ -91,10 +91,11 @@ here:
  * `output`: output of the command that failed (may be blank if an error
    occurred without running a command)
 
-Note that borgmatic runs the `on_error` hooks for any action in which an error
-occurs, not just the `create` action. But borgmatic does not run `on_error`
-hooks if an error occurs within a `before_everything` or `after_everything`
-hook. For more about hooks, see the [borgmatic hooks
+Note that borgmatic runs the `on_error` hooks only for `prune`, `create`, or
+`check` actions or hooks in which an error occurs, and not other actions. 
+borgmatic does not run `on_error` hooks if an error occurs within a
+`before_everything` or `after_everything` hook. For more about hooks, see the
+[borgmatic hooks
 documentation](https://torsion.org/borgmatic/docs/how-to/add-preparation-and-cleanup-steps-to-backups/),
 especially the security information.
 
@@ -116,21 +117,22 @@ hooks:
 With this hook in place, borgmatic pings your Healthchecks project when a
 backup begins, ends, or errors. Specifically, before the <a
 href="https://torsion.org/borgmatic/docs/how-to/add-preparation-and-cleanup-steps-to-backups/">`before_backup`
-hooks</a> run, borgmatic lets Healthchecks know that a backup has started.
+hooks</a> run, borgmatic lets Healthchecks know that it has started if any of
+the `prune`, `create`, or `check` actions are run.
 
-Then, if the backup completes successfully, borgmatic notifies Healthchecks of
+Then, if the actions complete successfully, borgmatic notifies Healthchecks of
 the success after the `after_backup` hooks run, and includes borgmatic logs in
 the payload data sent to Healthchecks. This means that borgmatic logs show up
 in the Healthchecks UI, although be aware that Healthchecks currently has a
 10-kilobyte limit for the logs in each ping.
 
-If an error occurs during the backup, borgmatic notifies Healthchecks after
+If an error occurs during any action, borgmatic notifies Healthchecks after
 the `on_error` hooks run, also tacking on logs including the error itself. But
-the logs are only included for errors that occur within the borgmatic `create`
-action (and not other actions).
+the logs are only included for errors that occur when a `prune`, `create`, or
+`check` action is run.
 
 Note that borgmatic sends logs to Healthchecks by applying the maximum of any
-other borgmatic verbosity level (`--verbosity`, `--syslog-verbosity`, etc.),
+other borgmatic verbosity levels (`--verbosity`, `--syslog-verbosity`, etc.),
 as there is not currently a dedicated Healthchecks verbosity setting.
 
 You can configure Healthchecks to notify you by a [variety of
@@ -155,10 +157,11 @@ hooks:
 With this hook in place, borgmatic pings your Cronitor monitor when a backup
 begins, ends, or errors. Specifically, before the <a
 href="https://torsion.org/borgmatic/docs/how-to/add-preparation-and-cleanup-steps-to-backups/">`before_backup`
-hooks</a> run, borgmatic lets Cronitor know that a backup has started. Then,
-if the backup completes successfully, borgmatic notifies Cronitor of the
-success after the `after_backup` hooks run. And if an error occurs during the
-backup, borgmatic notifies Cronitor after the `on_error` hooks run.
+hooks</a> run, borgmatic lets Cronitor know that it has started if any of the
+`prune`, `create`, or `check` actions are run. Then, if the actions complete
+successfully, borgmatic notifies Cronitor of the success after the
+`after_backup` hooks run. And if an error occurs during any action, borgmatic
+notifies Cronitor after the `on_error` hooks run.
 
 You can configure Cronitor to notify you by a [variety of
 mechanisms](https://cronitor.io/docs/cron-job-notifications) when backups fail
@@ -182,10 +185,11 @@ hooks:
 With this hook in place, borgmatic pings your Cronhub monitor when a backup
 begins, ends, or errors. Specifically, before the <a
 href="https://torsion.org/borgmatic/docs/how-to/add-preparation-and-cleanup-steps-to-backups/">`before_backup`
-hooks</a> run, borgmatic lets Cronhub know that a backup has started. Then,
-if the backup completes successfully, borgmatic notifies Cronhub of the
-success after the `after_backup` hooks run. And if an error occurs during the
-backup, borgmatic notifies Cronhub after the `on_error` hooks run.
+hooks</a> run, borgmatic lets Cronhub know that it has started if any of the
+`prune`, `create`, or `check` actions are run. Then, if the actions complete
+successfully, borgmatic notifies Cronhub of the success after the
+`after_backup` hooks run. And if an error occurs during any action, borgmatic
+notifies Cronhub after the `on_error` hooks run.
 
 Note that even though you configure borgmatic with the "start" variant of the
 ping URL, borgmatic substitutes the correct state into the URL when pinging

docs/how-to/set-up-backups.md

@@ -3,15 +3,11 @@ title: How to set up backups with borgmatic
 ---
 ## Installation
 
-To get up and running, first [install
-Borg](https://borgbackup.readthedocs.io/en/stable/installation.html), at
-least version 1.1.
+First, [install
+Borg](https://borgbackup.readthedocs.io/en/stable/installation.html), at least
+version 1.1.
 
-By default, borgmatic looks for its configuration files in `/etc/borgmatic/`
-and `/etc/borgmatic.d/`, where the root user typically has read access.
-
-So, to download and install borgmatic as the root user, run the following
-commands:
+Then, download and install borgmatic by running the following command:
 
 ```bash
 sudo pip3 install --user --upgrade borgmatic

scripts/release

@@ -23,10 +23,11 @@ git push github $version
 rm -fr dist
 python3 setup.py bdist_wheel
 python3 setup.py sdist
+gpg --detach-sign --armor dist/*
 twine upload -r pypi dist/borgmatic-*.tar.gz
 twine upload -r pypi dist/borgmatic-*-py3-none-any.whl
 
-# Set release changelogs on projects.evoworx.org and GitHub.
+# Set release changelogs on projects.torsion.org and GitHub.
 release_changelog="$(cat NEWS | sed '/^$/q' | grep -v '^\S')"
 escaped_release_changelog="$(echo "$release_changelog" | sed -z 's/\n/\\n/g' | sed -z 's/\"/\\"/g')"
 curl --silent --request POST \

setup.py

@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-VERSION = '1.4.19'
+VERSION = '1.4.21'
 
 
 setup(

tests/integration/config/test_override.py

@@ -0,0 +1,40 @@
+import pytest
+
+from borgmatic.config import override as module
+
+
+@pytest.mark.parametrize(
+    'value,expected_result',
+    (
+        ('thing', 'thing'),
+        ('33', 33),
+        ('33b', '33b'),
+        ('true', True),
+        ('false', False),
+        ('[foo]', ['foo']),
+        ('[foo, bar]', ['foo', 'bar']),
+    ),
+)
+def test_convert_value_type_coerces_values(value, expected_result):
+    assert module.convert_value_type(value) == expected_result
+
+
+def test_apply_overrides_updates_config():
+    raw_overrides = [
+        'section.key=value1',
+        'other_section.thing=value2',
+        'section.nested.key=value3',
+        'new.foo=bar',
+    ]
+    config = {
+        'section': {'key': 'value', 'other': 'other_value'},
+        'other_section': {'thing': 'thing_value'},
+    }
+
+    module.apply_overrides(config, raw_overrides)
+
+    assert config == {
+        'section': {'key': 'value1', 'other': 'other_value', 'nested': {'key': 'value3'}},
+        'other_section': {'thing': 'value2'},
+        'new': {'foo': 'bar'},
+    }

tests/integration/config/test_validate.py

@@ -212,3 +212,30 @@ def test_parse_configuration_raises_for_validation_error():
 
     with pytest.raises(module.Validation_error):
         module.parse_configuration('config.yaml', 'schema.yaml')
+
+
+def test_parse_configuration_applies_overrides():
+    mock_config_and_schema(
+        '''
+        location:
+            source_directories:
+                - /home
+
+            repositories:
+                - hostname.borg
+
+            local_path: borg1
+        '''
+    )
+
+    result = module.parse_configuration(
+        'config.yaml', 'schema.yaml', overrides=['location.local_path=borg2']
+    )
+
+    assert result == {
+        'location': {
+            'source_directories': ['/home'],
+            'repositories': ['hostname.borg'],
+            'local_path': 'borg2',
+        }
+    }

tests/unit/borg/test_prune.py

@@ -75,7 +75,9 @@ def test_prune_archives_with_log_info_calls_borg_with_info_parameter():
     flexmock(module).should_receive('_make_prune_flags').with_args(retention_config).and_return(
         BASE_PRUNE_FLAGS
     )
-    insert_execute_command_mock(PRUNE_COMMAND + ('--stats', '--info', 'repo'), logging.INFO)
+    insert_execute_command_mock(
+        PRUNE_COMMAND + ('--stats', '--info', '--list', 'repo'), logging.INFO
+    )
     insert_logging_mock(logging.INFO)
 
     module.prune_archives(

tests/unit/commands/test_borgmatic.py

@@ -20,7 +20,18 @@ def test_run_configuration_runs_actions_for_each_repository():
     assert results == expected_results
 
 
-def test_run_configuration_executes_hooks_for_create_action():
+def test_run_configuration_calls_hooks_for_prune_action():
+    flexmock(module.borg_environment).should_receive('initialize')
+    flexmock(module.command).should_receive('execute_hook').never()
+    flexmock(module.dispatch).should_receive('call_hooks').at_least().twice()
+    flexmock(module).should_receive('run_actions').and_return([])
+    config = {'location': {'repositories': ['foo']}}
+    arguments = {'global': flexmock(dry_run=False), 'prune': flexmock()}
+
+    list(module.run_configuration('test.yaml', config, arguments))
+
+
+def test_run_configuration_executes_and_calls_hooks_for_create_action():
     flexmock(module.borg_environment).should_receive('initialize')
     flexmock(module.command).should_receive('execute_hook').twice()
     flexmock(module.dispatch).should_receive('call_hooks').at_least().twice()
@@ -31,6 +42,28 @@ def test_run_configuration_executes_hooks_for_create_action():
     list(module.run_configuration('test.yaml', config, arguments))
 
 
+def test_run_configuration_calls_hooks_for_check_action():
+    flexmock(module.borg_environment).should_receive('initialize')
+    flexmock(module.command).should_receive('execute_hook').never()
+    flexmock(module.dispatch).should_receive('call_hooks').at_least().twice()
+    flexmock(module).should_receive('run_actions').and_return([])
+    config = {'location': {'repositories': ['foo']}}
+    arguments = {'global': flexmock(dry_run=False), 'check': flexmock()}
+
+    list(module.run_configuration('test.yaml', config, arguments))
+
+
+def test_run_configuration_does_not_trigger_hooks_for_list_action():
+    flexmock(module.borg_environment).should_receive('initialize')
+    flexmock(module.command).should_receive('execute_hook').never()
+    flexmock(module.dispatch).should_receive('call_hooks').never()
+    flexmock(module).should_receive('run_actions').and_return([])
+    config = {'location': {'repositories': ['foo']}}
+    arguments = {'global': flexmock(dry_run=False), 'list': flexmock()}
+
+    list(module.run_configuration('test.yaml', config, arguments))
+
+
 def test_run_configuration_logs_actions_error():
     flexmock(module.borg_environment).should_receive('initialize')
     flexmock(module.command).should_receive('execute_hook')
@@ -86,7 +119,7 @@ def test_run_configuration_logs_on_error_hook_error():
     ).and_return(expected_results[1:])
     flexmock(module).should_receive('run_actions').and_raise(OSError)
     config = {'location': {'repositories': ['foo']}}
-    arguments = {'global': flexmock(dry_run=False)}
+    arguments = {'global': flexmock(dry_run=False), 'create': flexmock()}
 
     results = list(module.run_configuration('test.yaml', config, arguments))
 

tests/unit/config/test_override.py

@@ -0,0 +1,82 @@
+import pytest
+from flexmock import flexmock
+
+from borgmatic.config import override as module
+
+
+def test_set_values_with_empty_keys_bails():
+    config = {}
+
+    module.set_values(config, keys=(), value='value')
+
+    assert config == {}
+
+
+def test_set_values_with_one_key_sets_it_into_config():
+    config = {}
+
+    module.set_values(config, keys=('key',), value='value')
+
+    assert config == {'key': 'value'}
+
+
+def test_set_values_with_one_key_overwrites_existing_key():
+    config = {'key': 'old_value', 'other': 'other_value'}
+
+    module.set_values(config, keys=('key',), value='value')
+
+    assert config == {'key': 'value', 'other': 'other_value'}
+
+
+def test_set_values_with_multiple_keys_creates_hierarchy():
+    config = {}
+
+    module.set_values(config, ('section', 'key'), 'value')
+
+    assert config == {'section': {'key': 'value'}}
+
+
+def test_set_values_with_multiple_keys_updates_hierarchy():
+    config = {'section': {'other': 'other_value'}}
+    module.set_values(config, ('section', 'key'), 'value')
+
+    assert config == {'section': {'key': 'value', 'other': 'other_value'}}
+
+
+def test_parse_overrides_splits_keys_and_values():
+    flexmock(module).should_receive('convert_value_type').replace_with(lambda value: value)
+    raw_overrides = ['section.my_option=value1', 'section.other_option=value2']
+    expected_result = (
+        (('section', 'my_option'), 'value1'),
+        (('section', 'other_option'), 'value2'),
+    )
+
+    module.parse_overrides(raw_overrides) == expected_result
+
+
+def test_parse_overrides_allows_value_with_equal_sign():
+    flexmock(module).should_receive('convert_value_type').replace_with(lambda value: value)
+    raw_overrides = ['section.option=this===value']
+    expected_result = ((('section', 'option'), 'this===value'),)
+
+    module.parse_overrides(raw_overrides) == expected_result
+
+
+def test_parse_overrides_raises_on_missing_equal_sign():
+    flexmock(module).should_receive('convert_value_type').replace_with(lambda value: value)
+    raw_overrides = ['section.option']
+
+    with pytest.raises(ValueError):
+        module.parse_overrides(raw_overrides)
+
+
+def test_parse_overrides_allows_value_with_single_key():
+    flexmock(module).should_receive('convert_value_type').replace_with(lambda value: value)
+    raw_overrides = ['option=value']
+    expected_result = ((('option',), 'value'),)
+
+    module.parse_overrides(raw_overrides) == expected_result
+
+
+def test_parse_overrides_handles_empty_overrides():
+    module.parse_overrides(raw_overrides=None) == ()