ssg.yaml.ordered_load() - Code Metrics - Inspection of "Merge pull request #6531 from mildas/sshd_set_keep..." - ComplianceAsCode/content - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 3ac411...885497 )

by Matěj

created 2021-01-20 16:30 UTC

ssg.yaml.ordered_load() A

↳ Parent: ssg.yaml

Complexity

Conditions

Size

Total Lines	14
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
eloc	10
nop	3
dl	0
loc	14
rs	9.9
c	0
b	0
f	0
ccs	8
cts	8
cp	1
crap	1

from __future__ import absolute_import
from __future__ import print_function

import codecs
import yaml
import sys
import re

from collections import OrderedDict

from .jinja import load_macros, process_file
from .constants import (PKG_MANAGER_TO_SYSTEM,
                        PKG_MANAGER_TO_CONFIG_FILE,
                        XCCDF_PLATFORM_TO_PACKAGE)
from .constants import DEFAULT_UID_MIN
from .utils import merge_dicts

try:
    from yaml import CSafeLoader as yaml_SafeLoader
except ImportError:
    from yaml import SafeLoader as yaml_SafeLoader


def _bool_constructor(self, node):
    return self.construct_scalar(node)


# Don't follow python bool case
yaml_SafeLoader.add_constructor(u'tag:yaml.org,2002:bool', _bool_constructor)


class DocumentationNotComplete(Exception):
    pass


def _save_rename(result, stem, prefix):
    result["{0}_{1}".format(prefix, stem)] = stem


def _open_yaml(stream, original_file=None, substitutions_dict={}):
    """
    Open given file-like object and parse it as YAML.

    Optionally, pass the path to the original_file for better error handling
    when the file contents are passed.

    Return None if it contains "documentation_complete" key set to "false".
    """
    try:
        yaml_contents = yaml.load(stream, Loader=yaml_SafeLoader)

        if yaml_contents.pop("documentation_complete", "true") == "false" and \
                substitutions_dict.get("cmake_build_type") != "Debug":
            raise DocumentationNotComplete("documentation not complete and not a debug build")

        return yaml_contents
    except DocumentationNotComplete as e:
        raise e
    except Exception as e:
        count = 0
        _file = original_file
        if not _file:
            _file = stream
        with open(_file, "r") as e_file:
            lines = e_file.readlines()
            for line in lines:
                count = count + 1
                if re.match(r"^\s*\t+\s*", line):
                    print("Exception while handling file: %s" % _file, file=sys.stderr)
                    print("TabIndentationError: Line %s contains tabs instead of spaces:" % (count), file=sys.stderr)
                    print("%s\n\n" % repr(line.strip("\n")), file=sys.stderr)
                    sys.exit(1)

        print("Exception while handling file: %s" % _file, file=sys.stderr)
        raise e


def _get_implied_properties(existing_properties):
    result = dict()
    if "pkg_manager" in existing_properties:
        pkg_manager = existing_properties["pkg_manager"]
        if "pkg_system" not in existing_properties:
            result["pkg_system"] = PKG_MANAGER_TO_SYSTEM[pkg_manager]
        if "pkg_manager_config_file" not in existing_properties:
            if pkg_manager in PKG_MANAGER_TO_CONFIG_FILE:
                result["pkg_manager_config_file"] = PKG_MANAGER_TO_CONFIG_FILE[pkg_manager]

    if "uid_min" not in existing_properties:
        result["uid_min"] = DEFAULT_UID_MIN

    if "auid" not in existing_properties:
        result["auid"] = existing_properties.get("uid_min", DEFAULT_UID_MIN)

    return result


def open_and_expand(yaml_file, substitutions_dict=None):
    """
    Process the file as a template, using substitutions_dict to perform
    expansion. Then, process the expansion result as a YAML content.

    See also: _open_yaml
    """
    if substitutions_dict is None:
        substitutions_dict = dict()

    expanded_template = process_file(yaml_file, substitutions_dict)
    try:
        yaml_contents = _open_yaml(expanded_template, yaml_file, substitutions_dict)
    except yaml.scanner.ScannerError as e:
        print("A Jinja template expansion can mess up the indentation.")
        print("Please, check if the contents below are correctly expanded:")
        print("Source yaml: {}".format(yaml_file))
        print("Expanded yaml:\n{}".format(expanded_template))
        sys.exit(1)

    return yaml_contents


def open_and_macro_expand(yaml_file, substitutions_dict=None):
    """
    Do the same as open_and_expand, but load definitions of macros
    so they can be expanded in the template.
    """
    substitutions_dict = load_macros(substitutions_dict)
    return open_and_expand(yaml_file, substitutions_dict)


def open_raw(yaml_file):
    """
    Open given file-like object and parse it as YAML
    without performing any kind of template processing

    See also: _open_yaml
    """
    with codecs.open(yaml_file, "r", "utf8") as stream:
        yaml_contents = _open_yaml(stream, original_file=yaml_file)
    return yaml_contents


def _validate_product_oval_feed_url(contents):
    if "oval_feed_url" not in contents:
        return
    url = contents["oval_feed_url"]
    if not url.startswith("https"):
        msg = (
            "OVAL feed of product '{product}' is not available through an encrypted channel: {url}"
            .format(product=contents["product"], url=url)
        )
        raise ValueError(msg)


def open_environment(build_config_yaml, product_yaml):
    contents = open_raw(build_config_yaml)
    contents.update(open_raw(product_yaml))
    _validate_product_oval_feed_url(contents)
    platform_package_overrides = contents.get("platform_package_overrides", {})
    # Merge common platform package mappings, while keeping product specific mappings
    contents["platform_package_overrides"] = merge_dicts(XCCDF_PLATFORM_TO_PACKAGE,
                                                         platform_package_overrides)
    contents.update(_get_implied_properties(contents))
    return contents


def ordered_load(stream, Loader=yaml.Loader, object_pairs_hook=OrderedDict):
    """
    Drop-in replacement for yaml.load(), but preserves order of dictionaries
    """
    class OrderedLoader(Loader):
        pass

    def construct_mapping(loader, node):
        loader.flatten_mapping(node)
        return object_pairs_hook(loader.construct_pairs(node))
    OrderedLoader.add_constructor(
        yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
        construct_mapping)
    return yaml.load(stream, OrderedLoader)


def ordered_dump(data, stream=None, Dumper=yaml.Dumper, **kwds):
    """
    Drop-in replacement for yaml.dump(), but preserves order of dictionaries
    """
    class OrderedDumper(Dumper):
        # fix tag indentations
        def increase_indent(self, flow=False, indentless=False):
            return super(OrderedDumper, self).increase_indent(flow, False)

    def _dict_representer(dumper, data):
        return dumper.represent_mapping(
            yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
            data.items())

    def _str_representer(dumper, data):
        if '\n' in data:
            return dumper.represent_scalar(u'tag:yaml.org,2002:str', data,
                                           style='|')
        else:
            return dumper.represent_str(data)

    OrderedDumper.add_representer(OrderedDict, _dict_representer)
    OrderedDumper.add_representer(str, _str_representer)

    # Fix formatting by adding a space in between tasks
    unformatted_yaml = yaml.dump(data, None, OrderedDumper, **kwds)
    formatted_yaml = re.sub(r"[\n]+([\s]*)- name", r"\n\n\1- name", unformatted_yaml)

    if stream is not None:
        return stream.write(formatted_yaml)
    else:
        return formatted_yaml


def _strings_to_list(one_or_more_strings):
    """
    Output a list, that either contains one string, or a list of strings.
    In Python, strings can be cast to lists without error, but with unexpected result.
    """
    if isinstance(one_or_more_strings, str):
        return [one_or_more_strings]
    else:
        return list(one_or_more_strings)


def update_yaml_list_or_string(current_contents, new_contents):

    result = []
    if current_contents:
        result += _strings_to_list(current_contents)
    if new_contents:
        result += _strings_to_list(new_contents)
    if not result:
        result = ""
    if len(result) == 1:
        result = result[0]
    return result


1	2		from __future__ import absolute_import
2	2		from __future__ import print_function
3
4	2		import codecs
5	2		import yaml
6	2		import sys
7	2		import re
8
9	2		from collections import OrderedDict
10
11	2		from .jinja import load_macros, process_file
12	2		from .constants import (PKG_MANAGER_TO_SYSTEM,
13			PKG_MANAGER_TO_CONFIG_FILE,
14			XCCDF_PLATFORM_TO_PACKAGE)
15	2		from .constants import DEFAULT_UID_MIN
16	2		from .utils import merge_dicts
17
18	2		try:
19	2		from yaml import CSafeLoader as yaml_SafeLoader
20			except ImportError:
21			from yaml import SafeLoader as yaml_SafeLoader
22
23
24	2		def _bool_constructor(self, node):
25	2		return self.construct_scalar(node)
26
27
28			# Don't follow python bool case
29	2		yaml_SafeLoader.add_constructor(u'tag:yaml.org,2002:bool', _bool_constructor)
30
31
32	2		class DocumentationNotComplete(Exception):
33	2		pass
34
35
36	2		def _save_rename(result, stem, prefix):
37			result["{0}_{1}".format(prefix, stem)] = stem
38
39
40	2		def _open_yaml(stream, original_file=None, substitutions_dict={}):
41			"""
42			Open given file-like object and parse it as YAML.
43
44			Optionally, pass the path to the original_file for better error handling
45			when the file contents are passed.
46
47			Return None if it contains "documentation_complete" key set to "false".
48			"""
49	2		try:
50	2		yaml_contents = yaml.load(stream, Loader=yaml_SafeLoader)
51
52	2		if yaml_contents.pop("documentation_complete", "true") == "false" and \
53			substitutions_dict.get("cmake_build_type") != "Debug":
54			raise DocumentationNotComplete("documentation not complete and not a debug build")
55
56	2		return yaml_contents
57			except DocumentationNotComplete as e:
58			raise e
59			except Exception as e:
60			count = 0
61			_file = original_file
62			if not _file:
63			_file = stream
64			with open(_file, "r") as e_file:
65			lines = e_file.readlines()
66			for line in lines:
67			count = count + 1
68			if re.match(r"^\s\t+\s", line):
69			print("Exception while handling file: %s" % _file, file=sys.stderr)
70			print("TabIndentationError: Line %s contains tabs instead of spaces:" % (count), file=sys.stderr)
71			print("%s\n\n" % repr(line.strip("\n")), file=sys.stderr)
72			sys.exit(1)
73
74			print("Exception while handling file: %s" % _file, file=sys.stderr)
75			raise e
76
77
78	2		def _get_implied_properties(existing_properties):
79			result = dict()
80			if "pkg_manager" in existing_properties:
81			pkg_manager = existing_properties["pkg_manager"]
82			if "pkg_system" not in existing_properties:
83			result["pkg_system"] = PKG_MANAGER_TO_SYSTEM[pkg_manager]
84			if "pkg_manager_config_file" not in existing_properties:
85			if pkg_manager in PKG_MANAGER_TO_CONFIG_FILE:
86			result["pkg_manager_config_file"] = PKG_MANAGER_TO_CONFIG_FILE[pkg_manager]
87
88			if "uid_min" not in existing_properties:
89			result["uid_min"] = DEFAULT_UID_MIN
90
91			if "auid" not in existing_properties:
92			result["auid"] = existing_properties.get("uid_min", DEFAULT_UID_MIN)
93
94			return result
95
96
97	2		def open_and_expand(yaml_file, substitutions_dict=None):
98			"""
99			Process the file as a template, using substitutions_dict to perform
100			expansion. Then, process the expansion result as a YAML content.
101
102			See also: _open_yaml
103			"""
104	2		if substitutions_dict is None:
105	2		substitutions_dict = dict()
106
107	2		expanded_template = process_file(yaml_file, substitutions_dict)
108	2		try:
109	2		yaml_contents = _open_yaml(expanded_template, yaml_file, substitutions_dict)
110			except yaml.scanner.ScannerError as e:
111			print("A Jinja template expansion can mess up the indentation.")
112			print("Please, check if the contents below are correctly expanded:")
113			print("Source yaml: {}".format(yaml_file))
114			print("Expanded yaml:\n{}".format(expanded_template))
115			sys.exit(1)
116
117	2		return yaml_contents
118
119
120	2		def open_and_macro_expand(yaml_file, substitutions_dict=None):
121			"""
122			Do the same as open_and_expand, but load definitions of macros
123			so they can be expanded in the template.
124			"""
125	2		substitutions_dict = load_macros(substitutions_dict)
126	2		return open_and_expand(yaml_file, substitutions_dict)
127
128
129	2		def open_raw(yaml_file):
130			"""
131			Open given file-like object and parse it as YAML
132			without performing any kind of template processing
133
134			See also: _open_yaml
135			"""
136	2		with codecs.open(yaml_file, "r", "utf8") as stream:
137	2		yaml_contents = _open_yaml(stream, original_file=yaml_file)
138	2		return yaml_contents
139
140
141	2		def _validate_product_oval_feed_url(contents):
142			if "oval_feed_url" not in contents:
143			return
144			url = contents["oval_feed_url"]
145			if not url.startswith("https"):
146			msg = (
147			"OVAL feed of product '{product}' is not available through an encrypted channel: {url}"
148			.format(product=contents["product"], url=url)
149			)
150			raise ValueError(msg)
151
152
153	2		def open_environment(build_config_yaml, product_yaml):
154			contents = open_raw(build_config_yaml)
155			contents.update(open_raw(product_yaml))
156			_validate_product_oval_feed_url(contents)
157			platform_package_overrides = contents.get("platform_package_overrides", {})
158			# Merge common platform package mappings, while keeping product specific mappings
159			contents["platform_package_overrides"] = merge_dicts(XCCDF_PLATFORM_TO_PACKAGE,
160			platform_package_overrides)
161			contents.update(_get_implied_properties(contents))
162			return contents
163
164
165	2		def ordered_load(stream, Loader=yaml.Loader, object_pairs_hook=OrderedDict):
166			"""
167			Drop-in replacement for yaml.load(), but preserves order of dictionaries
168			"""
169	2		class OrderedLoader(Loader):
170	2		pass
171
172	2		def construct_mapping(loader, node):
173	2		loader.flatten_mapping(node)
174	2		return object_pairs_hook(loader.construct_pairs(node))
175	2		OrderedLoader.add_constructor(
176			yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
177			construct_mapping)
178	2		return yaml.load(stream, OrderedLoader)
179
180
181	2		def ordered_dump(data, stream=None, Dumper=yaml.Dumper, **kwds):
182			"""
183			Drop-in replacement for yaml.dump(), but preserves order of dictionaries
184			"""
185	2		class OrderedDumper(Dumper):
186			# fix tag indentations
187	2		def increase_indent(self, flow=False, indentless=False):
188	2		return super(OrderedDumper, self).increase_indent(flow, False)
189
190	2		def _dict_representer(dumper, data):
191	2		return dumper.represent_mapping(
192			yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
193			data.items())
194
195	2		def _str_representer(dumper, data):
196	2		if '\n' in data:
197			return dumper.represent_scalar(u'tag:yaml.org,2002:str', data,
198			style='\|')
199			else:
200	2		return dumper.represent_str(data)
201
202	2		OrderedDumper.add_representer(OrderedDict, _dict_representer)
203	2		OrderedDumper.add_representer(str, _str_representer)
204
205			# Fix formatting by adding a space in between tasks
206	2		unformatted_yaml = yaml.dump(data, None, OrderedDumper, **kwds)
207	2		formatted_yaml = re.sub(r"[\n]+([\s]*)- name", r"\n\n\1- name", unformatted_yaml)
208
209	2		if stream is not None:
210	2		return stream.write(formatted_yaml)
211			else:
212	2		return formatted_yaml
213
214
215	2		def _strings_to_list(one_or_more_strings):
216			"""
217			Output a list, that either contains one string, or a list of strings.
218			In Python, strings can be cast to lists without error, but with unexpected result.
219			"""
220	2		if isinstance(one_or_more_strings, str):
221	2		return [one_or_more_strings]
222			else:
223	2		return list(one_or_more_strings)
224
225
226	2	View Code Duplication	def update_yaml_list_or_string(current_contents, new_contents):
			0 ignored issues – show Duplication introduced 2019-03-26 10:32 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
227	2		result = []
228	2		if current_contents:
229	2		result += _strings_to_list(current_contents)
230	2		if new_contents:
231	2		result += _strings_to_list(new_contents)
232	2		if not result:
233	2		result = ""
234	2		if len(result) == 1:
235	2		result = result[0]
236			return result
237

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