Fix for hooks executing when using --dry-run (#160).

NEWS

@@ -1,3 +1,6 @@
+1.3.2
+ * #160: Fix for hooks executing when using --dry-run. Now hooks are skipped during a dry run.
+
 1.3.1
  * #155: Fix for invalid JSON output when using multiple borgmatic configuration files.
  * #157: Fix for seemingly random filename ordering when running through a directory of

borgmatic/commands/borgmatic.py

@@ -272,7 +272,9 @@ def run_configuration(config_filename, config, args):  # pragma: no cover
         borg_environment.initialize(storage)
 
         if args.create:
-            hook.execute_hook(hooks.get('before_backup'), config_filename, 'pre-backup')
+            hook.execute_hook(
+                hooks.get('before_backup'), config_filename, 'pre-backup', args.dry_run
+            )
 
         for repository_path in location['repositories']:
             yield from run_actions(
@@ -287,9 +289,11 @@ def run_configuration(config_filename, config, args):  # pragma: no cover
             )
 
         if args.create:
-            hook.execute_hook(hooks.get('after_backup'), config_filename, 'post-backup')
+            hook.execute_hook(
+                hooks.get('after_backup'), config_filename, 'post-backup', args.dry_run
+            )
     except (OSError, CalledProcessError):
-        hook.execute_hook(hooks.get('on_error'), config_filename, 'on-error')
+        hook.execute_hook(hooks.get('on_error'), config_filename, 'on-error', args.dry_run)
         raise
 
 

borgmatic/commands/hook.py

@@ -5,20 +5,30 @@ import subprocess
 logger = logging.getLogger(__name__)
 
 
-def execute_hook(commands, config_filename, description):
+def execute_hook(commands, config_filename, description, dry_run):
+    '''
+
+    Given a list of hook commands to execute, a config filename, a hook description, and whether
+    this is a dry run, run the given commands. Or, don't run them if this is a dry run.
+    '''
     if not commands:
         logger.debug('{}: No commands to run for {} hook'.format(config_filename, description))
         return
 
+    dry_run_label = ' (dry run; not actually running hooks)' if dry_run else ''
+
     if len(commands) == 1:
-        logger.info('{}: Running command for {} hook'.format(config_filename, description))
+        logger.info(
+            '{}: Running command for {} hook{}'.format(config_filename, description, dry_run_label)
+        )
     else:
         logger.info(
-            '{}: Running {} commands for {} hook'.format(
-                config_filename, len(commands), description
+            '{}: Running {} commands for {} hook{}'.format(
+                config_filename, len(commands), description, dry_run_label
             )
         )
 
     for command in commands:
         logger.debug('{}: Hook command: {}'.format(config_filename, command))
-        subprocess.check_call(command, shell=True)
+        if not dry_run:
+            subprocess.check_call(command, shell=True)

setup.py

@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 
 
-VERSION = '1.3.1'
+VERSION = '1.3.2'
 
 
 setup(

tests/unit/commands/test_hook.py

@@ -7,7 +7,7 @@ def test_execute_hook_invokes_each_command():
     subprocess = flexmock(module.subprocess)
     subprocess.should_receive('check_call').with_args(':', shell=True).once()
 
-    module.execute_hook([':'], 'config.yaml', 'pre-backup')
+    module.execute_hook([':'], 'config.yaml', 'pre-backup', dry_run=False)
 
 
 def test_execute_hook_with_multiple_commands_invokes_each_command():
@@ -15,8 +15,15 @@ def test_execute_hook_with_multiple_commands_invokes_each_command():
     subprocess.should_receive('check_call').with_args(':', shell=True).once()
     subprocess.should_receive('check_call').with_args('true', shell=True).once()
 
-    module.execute_hook([':', 'true'], 'config.yaml', 'pre-backup')
+    module.execute_hook([':', 'true'], 'config.yaml', 'pre-backup', dry_run=False)
+
+
+def test_execute_hook_with_dry_run_skips_commands():
+    subprocess = flexmock(module.subprocess)
+    subprocess.should_receive('check_call').never()
+
+    module.execute_hook([':', 'true'], 'config.yaml', 'pre-backup', dry_run=True)
 
 
 def test_execute_hook_with_empty_commands_does_not_raise():
-    module.execute_hook([], 'config.yaml', 'post-backup')
+    module.execute_hook([], 'config.yaml', 'post-backup', dry_run=False)