ansible-later/ansiblelater/rules/ansiblefiles.py

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import re
import os
from collections import defaultdict
from ansiblelater import Result, Error
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from ansiblelater.utils import count_spaces
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from ansiblelater.utils.rulehelper import (get_normalized_tasks,
get_normalized_yaml)
def check_braces_spaces(candidate, settings):
yamllines, errors = get_normalized_yaml(candidate, settings)
description = "no suitable numbers of spaces (required: 1)"
matches = []
braces = re.compile("{{(.*?)}}")
if not errors:
for i, line in yamllines:
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match = braces.findall(line)
if match:
for item in match:
matches.append((i, item))
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for i, line in matches:
leading, trailing = count_spaces(line)
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if not leading == 1 or not trailing == 1:
errors.append(Error(i, description))
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return Result(candidate.path, errors)
def check_named_task(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
nameless_tasks = ['meta', 'debug', 'include_role', 'import_role',
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'include_tasks', 'import_tasks', 'include_vars',
'block']
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description = "module '%s' used without name attribute"
if not errors:
for task in tasks:
module = task["action"]["__ansible_module__"]
if 'name' not in task and module not in nameless_tasks:
errors.append(Error(task['__line__'], description % module))
return Result(candidate.path, errors)
def check_name_format(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
description = "name '%s' should start with uppercase"
namelines = defaultdict(list)
if not errors:
for task in tasks:
if 'name' in task:
namelines[task['name']].append(task['__line__'])
for (name, lines) in namelines.items():
if not name[0].isupper():
errors.append(Error(lines[-1], description % name))
return Result(candidate.path, errors)
def check_unique_named_task(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
description = "name '%s' appears multiple times"
namelines = defaultdict(list)
if not errors:
for task in tasks:
if 'name' in task:
namelines[task['name']].append(task['__line__'])
for (name, lines) in namelines.items():
if len(lines) > 1:
errors.append(Error(lines[-1], description % name))
return Result(candidate.path, errors)
def check_command_instead_of_module(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
commands = ['command', 'shell', 'raw']
modules = {
'git': 'git', 'hg': 'hg', 'curl': 'get_url or uri', 'wget': 'get_url or uri',
'svn': 'subversion', 'service': 'service', 'mount': 'mount',
'rpm': 'yum or rpm_key', 'yum': 'yum', 'apt-get': 'apt-get',
'unzip': 'unarchive', 'tar': 'unarchive', 'chkconfig': 'service',
'rsync': 'synchronize', 'supervisorctl': 'supervisorctl', 'systemctl': 'systemd',
'sed': 'template or lineinfile'
}
description = "%s command used in place of %s module"
if not errors:
for task in tasks:
if task["action"]["__ansible_module__"] in commands:
if 'cmd' in task['action']:
first_cmd_arg = task["action"]["cmd"].split()[0]
else:
first_cmd_arg = task["action"]["__ansible_arguments__"][0]
executable = os.path.basename(first_cmd_arg)
if (first_cmd_arg and executable in modules
and task['action'].get('warn', True) and 'register' not in task):
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errors.append(
Error(task["__line__"], description % (executable, modules[executable])))
return Result(candidate.path, errors)
def check_install_use_latest(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
package_managers = ['yum', 'apt', 'dnf', 'homebrew', 'pacman', 'openbsd_package', 'pkg5',
'portage', 'pkgutil', 'slackpkg', 'swdepot', 'zypper', 'bundler', 'pip',
'pear', 'npm', 'yarn', 'gem', 'easy_install', 'bower', 'package', 'apk',
'openbsd_pkg', 'pkgng', 'sorcery', 'xbps']
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description = "package installs should use state=present with or without a version"
if not errors:
for task in tasks:
if (task["action"]["__ansible_module__"] in package_managers
and task["action"].get("state") == "latest"):
errors.append(Error(task["__line__"], description))
return Result(candidate.path, errors)
def check_shell_instead_command(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
description = "shell should only be used when piping, redirecting or chaining commands"
if not errors:
for task in tasks:
if task["action"]["__ansible_module__"] == 'shell':
if 'cmd' in task['action']:
cmd = task["action"].get("cmd", [])
else:
cmd = ' '.join(task["action"].get("__ansible_arguments__", []))
unjinja = re.sub(r"\{\{[^\}]*\}\}", "JINJA_VAR", cmd)
if not any([ch in unjinja for ch in '&|<>;$\n*[]{}?']):
errors.append(Error(task["__line__"], description))
return Result(candidate.path, errors)
def check_command_has_changes(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
commands = ['command', 'shell', 'raw']
description = "commands should either read information (and thus set changed_when) or not " \
"do something if it has already been done (using creates/removes) " \
"or only do it if another check has a particular result (when)"
if not errors:
for task in tasks:
if task["action"]["__ansible_module__"] in commands:
if ('changed_when' not in task and 'when' not in task
and 'when' not in task['__ansible_action_meta__']
and 'creates' not in task['action']
and 'removes' not in task['action']):
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errors.append(Error(task["__line__"], description))
return Result(candidate.path, errors)
def check_empty_string_compare(candidate, settings):
yamllines, errors = get_normalized_yaml(candidate, settings)
description = 'use `when: var` rather than `when: var != ""` (or ' \
'conversely `when: not var` rather than `when: var == ""`)'
empty_string_compare = re.compile("[=!]= ?[\"'][\"']")
if not errors:
for i, line in yamllines:
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if empty_string_compare.findall(line):
errors.append(Error(i, description))
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return Result(candidate.path, errors)
def check_compare_to_literal_bool(candidate, settings):
yamllines, errors = get_normalized_yaml(candidate, settings)
description = "use `when: var` rather than `when: var == True` " \
"(or conversely `when: not var`)"
literal_bool_compare = re.compile("[=!]= ?(True|true|False|false)")
if not errors:
for i, line in yamllines:
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if literal_bool_compare.findall(line):
errors.append(Error(i, description))
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return Result(candidate.path, errors)
def check_delegate_to_localhost(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
description = "connection: local ensures that unexpected delegated_vars " \
"don't get set (e.g. {{ inventory_hostname }} " \
"used by vars_files)"
if not errors:
for task in tasks:
if task.get('delegate_to') == 'localhost':
errors.append(Error(task["__line__"], description))
return Result(candidate.path, errors)
def check_literal_bool_format(candidate, settings):
yamllines, errors = get_normalized_yaml(candidate, settings)
description = "literal bools should be written as 'True/False' or 'yes/no'"
uppercase_bool = re.compile(r"([=!]=|:)\s*(true|false|TRUE|FALSE|Yes|No|YES|NO)\s*$")
if not errors:
for i, line in yamllines:
if uppercase_bool.findall(line):
errors.append(Error(i, description))
return Result(candidate.path, errors)
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def check_become_user(candidate, settings):
tasks, errors = get_normalized_tasks(candidate, settings)
description = "the task has 'become:' enabled but 'become_user:' is missing"
true_value = [True, 'true', 'True', 'TRUE', 'yes', 'Yes', 'YES']
if not errors:
gen = (task for task in tasks if 'become' in task)
for task in gen:
if task["become"] in true_value and 'become_user' not in task.keys():
errors.append(Error(task["__line__"], description))
return Result(candidate.path, errors)
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def check_filter_separation(candidate, settings):
yamllines, errors = get_normalized_yaml(candidate, settings)
description = "no suitable numbers of spaces (required: 1)"
matches = []
braces = re.compile("{{(.*?)}}")
filters = re.compile(r"(?<=\|)([\s]{2,}[^\s}]+|[^\s]+)|([^\s{]+[\s]{2,}|[^\s]+)(?=\|)")
if not errors:
for i, line in yamllines:
match = braces.findall(line)
if match:
for item in match:
matches.append((i, item))
for i, line in matches:
if filters.findall(line):
errors.append(Error(i, description))
return Result(candidate.path, errors)