177 lines
7 KiB
Python
177 lines
7 KiB
Python
# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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from ansible.errors.yaml_strings import *
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class AnsibleError(Exception):
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'''
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This is the base class for all errors raised from Ansible code,
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and can be instantiated with two optional parameters beyond the
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error message to control whether detailed information is displayed
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when the error occurred while parsing a data file of some kind.
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Usage:
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raise AnsibleError('some message here', obj=obj, show_content=True)
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Where "obj" is some subclass of ansible.parsing.yaml.objects.AnsibleBaseYAMLObject,
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which should be returned by the DataLoader() class.
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'''
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def __init__(self, message, obj=None, show_content=True):
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# we import this here to prevent an import loop problem,
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# since the objects code also imports ansible.errors
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from ansible.parsing.yaml.objects import AnsibleBaseYAMLObject
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self._obj = obj
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self._show_content = show_content
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if obj and isinstance(obj, AnsibleBaseYAMLObject):
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extended_error = self._get_extended_error()
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if extended_error:
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self.message = 'ERROR! %s\n\n%s' % (message, extended_error)
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else:
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self.message = 'ERROR! %s' % message
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def __str__(self):
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return self.message
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def __repr__(self):
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return self.message
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def _get_error_lines_from_file(self, file_name, line_number):
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'''
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Returns the line in the file which coresponds to the reported error
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location, as well as the line preceding it (if the error did not
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occur on the first line), to provide context to the error.
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'''
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target_line = ''
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prev_line = ''
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with open(file_name, 'r') as f:
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lines = f.readlines()
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target_line = lines[line_number]
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if line_number > 0:
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prev_line = lines[line_number - 1]
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return (target_line, prev_line)
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def _get_extended_error(self):
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'''
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Given an object reporting the location of the exception in a file, return
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detailed information regarding it including:
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* the line which caused the error as well as the one preceding it
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* causes and suggested remedies for common syntax errors
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If this error was created with show_content=False, the reporting of content
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is suppressed, as the file contents may be sensitive (ie. vault data).
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'''
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error_message = ''
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try:
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(src_file, line_number, col_number) = self._obj.ansible_pos
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error_message += YAML_POSITION_DETAILS % (src_file, line_number, col_number)
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if src_file not in ('<string>', '<unicode>') and self._show_content:
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(target_line, prev_line) = self._get_error_lines_from_file(src_file, line_number - 1)
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if target_line:
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stripped_line = target_line.replace(" ","")
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arrow_line = (" " * (col_number-1)) + "^ here"
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#header_line = ("=" * 73)
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error_message += "\nThe offending line appears to be:\n\n%s\n%s\n%s\n" % (prev_line.rstrip(), target_line.rstrip(), arrow_line)
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# common error/remediation checking here:
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# check for unquoted vars starting lines
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if ('{{' in target_line and '}}' in target_line) and ('"{{' not in target_line or "'{{" not in target_line):
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error_message += YAML_COMMON_UNQUOTED_VARIABLE_ERROR
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# check for common dictionary mistakes
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elif ":{{" in stripped_line and "}}" in stripped_line:
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error_message += YAML_COMMON_DICT_ERROR
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# check for common unquoted colon mistakes
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elif len(target_line) and len(target_line) > 1 and len(target_line) > col_number and target_line[col_number] == ":" and target_line.count(':') > 1:
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error_message += YAML_COMMON_UNQUOTED_COLON_ERROR
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# otherwise, check for some common quoting mistakes
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else:
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parts = target_line.split(":")
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if len(parts) > 1:
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middle = parts[1].strip()
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match = False
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unbalanced = False
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if middle.startswith("'") and not middle.endswith("'"):
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match = True
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elif middle.startswith('"') and not middle.endswith('"'):
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match = True
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if len(middle) > 0 and middle[0] in [ '"', "'" ] and middle[-1] in [ '"', "'" ] and target_line.count("'") > 2 or target_line.count('"') > 2:
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unbalanced = True
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if match:
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error_message += YAML_COMMON_PARTIALLY_QUOTED_LINE_ERROR
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if unbalanced:
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error_message += YAML_COMMON_UNBALANCED_QUOTES_ERROR
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except (IOError, TypeError):
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error_message += '\n(could not open file to display line)'
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except IndexError:
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error_message += '\n(specified line no longer in file, maybe it changed?)'
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return error_message
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class AnsibleParserError(AnsibleError):
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''' something was detected early that is wrong about a playbook or data file '''
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pass
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class AnsibleInternalError(AnsibleError):
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''' internal safeguards tripped, something happened in the code that should never happen '''
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pass
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class AnsibleRuntimeError(AnsibleError):
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''' ansible had a problem while running a playbook '''
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pass
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class AnsibleModuleError(AnsibleRuntimeError):
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''' a module failed somehow '''
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pass
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class AnsibleConnectionFailure(AnsibleRuntimeError):
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''' the transport / connection_plugin had a fatal error '''
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pass
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class AnsibleFilterError(AnsibleRuntimeError):
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''' a templating failure '''
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pass
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class AnsibleUndefinedVariable(AnsibleRuntimeError):
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''' a templating failure '''
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pass
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class AnsibleFileNotFound(AnsibleRuntimeError):
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''' a file missing failure '''
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pass
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class AnsibleParserError(AnsibleRuntimeError):
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''' a parser error '''
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pass
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