Warn when an unsupported variable is used in a hook command (#420).

This commit is contained in:
Dan Helfman 2022-05-23 15:27:54 -07:00
parent b98b827594
commit 3e4aeec649
3 changed files with 33 additions and 12 deletions

1
NEWS
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@ -1,4 +1,5 @@
1.6.1.dev0
* #420: Warn when an unsupported variable is used in a hook command.
* #528: Improve the error message when a configuration override contains an invalid value.
* #531: BREAKING: When deep merging common configuration, merge colliding list values by appending
them. Previously, one list replaced the other.

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@ -1,5 +1,6 @@
import logging
import os
import re
from borgmatic import execute
@ -9,14 +10,19 @@ logger = logging.getLogger(__name__)
SOFT_FAIL_EXIT_CODE = 75
def interpolate_context(command, context):
def interpolate_context(config_filename, hook_description, command, context):
'''
Given a single hook command and a dict of context names/values, interpolate the values by
"{name}" into the command and return the result.
Given a config filename, a hook description, a single hook command, and a dict of context
names/values, interpolate the values by "{name}" into the command and return the result.
'''
for name, value in context.items():
command = command.replace('{%s}' % name, str(value))
for unsupported_variable in re.findall(r'{\w+}', command):
logger.warn(
f"{config_filename}: Variable '{unsupported_variable}' is not supported in {hook_description} hook"
)
return command
@ -38,7 +44,9 @@ def execute_hook(commands, umask, config_filename, description, dry_run, **conte
dry_run_label = ' (dry run; not actually running hooks)' if dry_run else ''
context['configuration_filename'] = config_filename
commands = [interpolate_context(command, context) for command in commands]
commands = [
interpolate_context(config_filename, description, command, context) for command in commands
]
if len(commands) == 1:
logger.info(

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@ -7,22 +7,34 @@ from borgmatic.hooks import command as module
def test_interpolate_context_passes_through_command_without_variable():
assert module.interpolate_context('ls', {'foo': 'bar'}) == 'ls'
assert module.interpolate_context('test.yaml', 'pre-backup', 'ls', {'foo': 'bar'}) == 'ls'
def test_interpolate_context_passes_through_command_with_unknown_variable():
assert module.interpolate_context('ls {baz}', {'foo': 'bar'}) == 'ls {baz}'
assert (
module.interpolate_context('test.yaml', 'pre-backup', 'ls {baz}', {'foo': 'bar'})
== 'ls {baz}'
)
def test_interpolate_context_interpolates_variables():
context = {'foo': 'bar', 'baz': 'quux'}
assert module.interpolate_context('ls {foo}{baz} {baz}', context) == 'ls barquux quux'
assert (
module.interpolate_context('test.yaml', 'pre-backup', 'ls {foo}{baz} {baz}', context)
== 'ls barquux quux'
)
def test_interpolate_context_does_not_touch_unknown_variables():
context = {'foo': 'bar', 'baz': 'quux'}
assert module.interpolate_context('test.yaml', 'pre-backup', 'ls {wtf}', context) == 'ls {wtf}'
def test_execute_hook_invokes_each_command():
flexmock(module).should_receive('interpolate_context').replace_with(
lambda command, context: command
lambda config_file, hook_description, command, context: command
)
flexmock(module.execute).should_receive('execute_command').with_args(
[':'], output_log_level=logging.WARNING, shell=True
@ -33,7 +45,7 @@ def test_execute_hook_invokes_each_command():
def test_execute_hook_with_multiple_commands_invokes_each_command():
flexmock(module).should_receive('interpolate_context').replace_with(
lambda command, context: command
lambda config_file, hook_description, command, context: command
)
flexmock(module.execute).should_receive('execute_command').with_args(
[':'], output_log_level=logging.WARNING, shell=True
@ -47,7 +59,7 @@ def test_execute_hook_with_multiple_commands_invokes_each_command():
def test_execute_hook_with_umask_sets_that_umask():
flexmock(module).should_receive('interpolate_context').replace_with(
lambda command, context: command
lambda config_file, hook_description, command, context: command
)
flexmock(module.os).should_receive('umask').with_args(0o77).and_return(0o22).once()
flexmock(module.os).should_receive('umask').with_args(0o22).once()
@ -60,7 +72,7 @@ def test_execute_hook_with_umask_sets_that_umask():
def test_execute_hook_with_dry_run_skips_commands():
flexmock(module).should_receive('interpolate_context').replace_with(
lambda command, context: command
lambda config_file, hook_description, command, context: command
)
flexmock(module.execute).should_receive('execute_command').never()
@ -73,7 +85,7 @@ def test_execute_hook_with_empty_commands_does_not_raise():
def test_execute_hook_on_error_logs_as_error():
flexmock(module).should_receive('interpolate_context').replace_with(
lambda command, context: command
lambda config_file, hook_description, command, context: command
)
flexmock(module.execute).should_receive('execute_command').with_args(
[':'], output_log_level=logging.ERROR, shell=True