aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/python/Jinja2/py3/jinja2/exceptions.py
blob: 082ebe8f221d4e7e980e4d321c0a0c5da033b124 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
import typing as t

if t.TYPE_CHECKING:
    from .runtime import Undefined


class TemplateError(Exception):
    """Baseclass for all template errors."""

    def __init__(self, message: t.Optional[str] = None) -> None:
        super().__init__(message)

    @property
    def message(self) -> t.Optional[str]:
        return self.args[0] if self.args else None


class TemplateNotFound(IOError, LookupError, TemplateError):
    """Raised if a template does not exist.

    .. versionchanged:: 2.11
        If the given name is :class:`Undefined` and no message was
        provided, an :exc:`UndefinedError` is raised.
    """

    # Silence the Python warning about message being deprecated since
    # it's not valid here.
    message: t.Optional[str] = None

    def __init__(
        self,
        name: t.Optional[t.Union[str, "Undefined"]],
        message: t.Optional[str] = None,
    ) -> None:
        IOError.__init__(self, name)

        if message is None:
            from .runtime import Undefined

            if isinstance(name, Undefined):
                name._fail_with_undefined_error()

            message = name

        self.message = message
        self.name = name
        self.templates = [name]

    def __str__(self) -> str:
        return str(self.message)


class TemplatesNotFound(TemplateNotFound):
    """Like :class:`TemplateNotFound` but raised if multiple templates
    are selected.  This is a subclass of :class:`TemplateNotFound`
    exception, so just catching the base exception will catch both.

    .. versionchanged:: 2.11
        If a name in the list of names is :class:`Undefined`, a message
        about it being undefined is shown rather than the empty string.

    .. versionadded:: 2.2
    """

    def __init__(
        self,
        names: t.Sequence[t.Union[str, "Undefined"]] = (),
        message: t.Optional[str] = None,
    ) -> None:
        if message is None:
            from .runtime import Undefined

            parts = []

            for name in names:
                if isinstance(name, Undefined):
                    parts.append(name._undefined_message)
                else:
                    parts.append(name)

            parts_str = ", ".join(map(str, parts))
            message = f"none of the templates given were found: {parts_str}"

        super().__init__(names[-1] if names else None, message)
        self.templates = list(names)


class TemplateSyntaxError(TemplateError):
    """Raised to tell the user that there is a problem with the template."""

    def __init__(
        self,
        message: str,
        lineno: int,
        name: t.Optional[str] = None,
        filename: t.Optional[str] = None,
    ) -> None:
        super().__init__(message)
        self.lineno = lineno
        self.name = name
        self.filename = filename
        self.source: t.Optional[str] = None

        # this is set to True if the debug.translate_syntax_error
        # function translated the syntax error into a new traceback
        self.translated = False

    def __str__(self) -> str:
        # for translated errors we only return the message
        if self.translated:
            return t.cast(str, self.message)

        # otherwise attach some stuff
        location = f"line {self.lineno}"
        name = self.filename or self.name
        if name:
            location = f'File "{name}", {location}'
        lines = [t.cast(str, self.message), "  " + location]

        # if the source is set, add the line to the output
        if self.source is not None:
            try:
                line = self.source.splitlines()[self.lineno - 1]
            except IndexError:
                pass
            else:
                lines.append("    " + line.strip())

        return "\n".join(lines)

    def __reduce__(self):  # type: ignore
        # https://bugs.python.org/issue1692335 Exceptions that take
        # multiple required arguments have problems with pickling.
        # Without this, raises TypeError: __init__() missing 1 required
        # positional argument: 'lineno'
        return self.__class__, (self.message, self.lineno, self.name, self.filename)


class TemplateAssertionError(TemplateSyntaxError):
    """Like a template syntax error, but covers cases where something in the
    template caused an error at compile time that wasn't necessarily caused
    by a syntax error.  However it's a direct subclass of
    :exc:`TemplateSyntaxError` and has the same attributes.
    """


class TemplateRuntimeError(TemplateError):
    """A generic runtime error in the template engine.  Under some situations
    Jinja may raise this exception.
    """


class UndefinedError(TemplateRuntimeError):
    """Raised if a template tries to operate on :class:`Undefined`."""


class SecurityError(TemplateRuntimeError):
    """Raised if a template tries to do something insecure if the
    sandbox is enabled.
    """


class FilterArgumentError(TemplateRuntimeError):
    """This error is raised if a filter was called with inappropriate
    arguments
    """