This file is indexed.

/usr/lib/python3/dist-packages/jinja2/loaders.py is in python3-jinja2 2.7.2-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
# -*- coding: utf-8 -*-
"""
    jinja2.loaders
    ~~~~~~~~~~~~~~

    Jinja loader classes.

    :copyright: (c) 2010 by the Jinja Team.
    :license: BSD, see LICENSE for more details.
"""
import os
import sys
import weakref
from types import ModuleType
from os import path
from hashlib import sha1
from jinja2.exceptions import TemplateNotFound
from jinja2.utils import open_if_exists, internalcode
from jinja2._compat import string_types, iteritems


def split_template_path(template):
    """Split a path into segments and perform a sanity check.  If it detects
    '..' in the path it will raise a `TemplateNotFound` error.
    """
    pieces = []
    for piece in template.split('/'):
        if path.sep in piece \
           or (path.altsep and path.altsep in piece) or \
           piece == path.pardir:
            raise TemplateNotFound(template)
        elif piece and piece != '.':
            pieces.append(piece)
    return pieces


class BaseLoader(object):
    """Baseclass for all loaders.  Subclass this and override `get_source` to
    implement a custom loading mechanism.  The environment provides a
    `get_template` method that calls the loader's `load` method to get the
    :class:`Template` object.

    A very basic example for a loader that looks up templates on the file
    system could look like this::

        from jinja2 import BaseLoader, TemplateNotFound
        from os.path import join, exists, getmtime

        class MyLoader(BaseLoader):

            def __init__(self, path):
                self.path = path

            def get_source(self, environment, template):
                path = join(self.path, template)
                if not exists(path):
                    raise TemplateNotFound(template)
                mtime = getmtime(path)
                with file(path) as f:
                    source = f.read().decode('utf-8')
                return source, path, lambda: mtime == getmtime(path)
    """

    #: if set to `False` it indicates that the loader cannot provide access
    #: to the source of templates.
    #:
    #: .. versionadded:: 2.4
    has_source_access = True

    def get_source(self, environment, template):
        """Get the template source, filename and reload helper for a template.
        It's passed the environment and template name and has to return a
        tuple in the form ``(source, filename, uptodate)`` or raise a
        `TemplateNotFound` error if it can't locate the template.

        The source part of the returned tuple must be the source of the
        template as unicode string or a ASCII bytestring.  The filename should
        be the name of the file on the filesystem if it was loaded from there,
        otherwise `None`.  The filename is used by python for the tracebacks
        if no loader extension is used.

        The last item in the tuple is the `uptodate` function.  If auto
        reloading is enabled it's always called to check if the template
        changed.  No arguments are passed so the function must store the
        old state somewhere (for example in a closure).  If it returns `False`
        the template will be reloaded.
        """
        if not self.has_source_access:
            raise RuntimeError('%s cannot provide access to the source' %
                               self.__class__.__name__)
        raise TemplateNotFound(template)

    def list_templates(self):
        """Iterates over all templates.  If the loader does not support that
        it should raise a :exc:`TypeError` which is the default behavior.
        """
        raise TypeError('this loader cannot iterate over all templates')

    @internalcode
    def load(self, environment, name, globals=None):
        """Loads a template.  This method looks up the template in the cache
        or loads one by calling :meth:`get_source`.  Subclasses should not
        override this method as loaders working on collections of other
        loaders (such as :class:`PrefixLoader` or :class:`ChoiceLoader`)
        will not call this method but `get_source` directly.
        """
        code = None
        if globals is None:
            globals = {}

        # first we try to get the source for this template together
        # with the filename and the uptodate function.
        source, filename, uptodate = self.get_source(environment, name)

        # try to load the code from the bytecode cache if there is a
        # bytecode cache configured.
        bcc = environment.bytecode_cache
        if bcc is not None:
            bucket = bcc.get_bucket(environment, name, filename, source)
            code = bucket.code

        # if we don't have code so far (not cached, no longer up to
        # date) etc. we compile the template
        if code is None:
            code = environment.compile(source, name, filename)

        # if the bytecode cache is available and the bucket doesn't
        # have a code so far, we give the bucket the new code and put
        # it back to the bytecode cache.
        if bcc is not None and bucket.code is None:
            bucket.code = code
            bcc.set_bucket(bucket)

        return environment.template_class.from_code(environment, code,
                                                    globals, uptodate)


class FileSystemLoader(BaseLoader):
    """Loads templates from the file system.  This loader can find templates
    in folders on the file system and is the preferred way to load them.

    The loader takes the path to the templates as string, or if multiple
    locations are wanted a list of them which is then looked up in the
    given order:

    >>> loader = FileSystemLoader('/path/to/templates')
    >>> loader = FileSystemLoader(['/path/to/templates', '/other/path'])

    Per default the template encoding is ``'utf-8'`` which can be changed
    by setting the `encoding` parameter to something else.
    """

    def __init__(self, searchpath, encoding='utf-8'):
        if isinstance(searchpath, string_types):
            searchpath = [searchpath]
        self.searchpath = list(searchpath)
        self.encoding = encoding

    def get_source(self, environment, template):
        pieces = split_template_path(template)
        for searchpath in self.searchpath:
            filename = path.join(searchpath, *pieces)
            f = open_if_exists(filename)
            if f is None:
                continue
            try:
                contents = f.read().decode(self.encoding)
            finally:
                f.close()

            mtime = path.getmtime(filename)
            def uptodate():
                try:
                    return path.getmtime(filename) == mtime
                except OSError:
                    return False
            return contents, filename, uptodate
        raise TemplateNotFound(template)

    def list_templates(self):
        found = set()
        for searchpath in self.searchpath:
            for dirpath, dirnames, filenames in os.walk(searchpath):
                for filename in filenames:
                    template = os.path.join(dirpath, filename) \
                        [len(searchpath):].strip(os.path.sep) \
                                          .replace(os.path.sep, '/')
                    if template[:2] == './':
                        template = template[2:]
                    if template not in found:
                        found.add(template)
        return sorted(found)


class PackageLoader(BaseLoader):
    """Load templates from python eggs or packages.  It is constructed with
    the name of the python package and the path to the templates in that
    package::

        loader = PackageLoader('mypackage', 'views')

    If the package path is not given, ``'templates'`` is assumed.

    Per default the template encoding is ``'utf-8'`` which can be changed
    by setting the `encoding` parameter to something else.  Due to the nature
    of eggs it's only possible to reload templates if the package was loaded
    from the file system and not a zip file.
    """

    def __init__(self, package_name, package_path='templates',
                 encoding='utf-8'):
        from pkg_resources import DefaultProvider, ResourceManager, \
                                  get_provider
        provider = get_provider(package_name)
        self.encoding = encoding
        self.manager = ResourceManager()
        self.filesystem_bound = isinstance(provider, DefaultProvider)
        self.provider = provider
        self.package_path = package_path

    def get_source(self, environment, template):
        pieces = split_template_path(template)
        p = '/'.join((self.package_path,) + tuple(pieces))
        if not self.provider.has_resource(p):
            raise TemplateNotFound(template)

        filename = uptodate = None
        if self.filesystem_bound:
            filename = self.provider.get_resource_filename(self.manager, p)
            mtime = path.getmtime(filename)
            def uptodate():
                try:
                    return path.getmtime(filename) == mtime
                except OSError:
                    return False

        source = self.provider.get_resource_string(self.manager, p)
        return source.decode(self.encoding), filename, uptodate

    def list_templates(self):
        path = self.package_path
        if path[:2] == './':
            path = path[2:]
        elif path == '.':
            path = ''
        offset = len(path)
        results = []
        def _walk(path):
            for filename in self.provider.resource_listdir(path):
                fullname = path + '/' + filename
                if self.provider.resource_isdir(fullname):
                    _walk(fullname)
                else:
                    results.append(fullname[offset:].lstrip('/'))
        _walk(path)
        results.sort()
        return results


class DictLoader(BaseLoader):
    """Loads a template from a python dict.  It's passed a dict of unicode
    strings bound to template names.  This loader is useful for unittesting:

    >>> loader = DictLoader({'index.html': 'source here'})

    Because auto reloading is rarely useful this is disabled per default.
    """

    def __init__(self, mapping):
        self.mapping = mapping

    def get_source(self, environment, template):
        if template in self.mapping:
            source = self.mapping[template]
            return source, None, lambda: source == self.mapping.get(template)
        raise TemplateNotFound(template)

    def list_templates(self):
        return sorted(self.mapping)


class FunctionLoader(BaseLoader):
    """A loader that is passed a function which does the loading.  The
    function becomes the name of the template passed and has to return either
    an unicode string with the template source, a tuple in the form ``(source,
    filename, uptodatefunc)`` or `None` if the template does not exist.

    >>> def load_template(name):
    ...     if name == 'index.html':
    ...         return '...'
    ...
    >>> loader = FunctionLoader(load_template)

    The `uptodatefunc` is a function that is called if autoreload is enabled
    and has to return `True` if the template is still up to date.  For more
    details have a look at :meth:`BaseLoader.get_source` which has the same
    return value.
    """

    def __init__(self, load_func):
        self.load_func = load_func

    def get_source(self, environment, template):
        rv = self.load_func(template)
        if rv is None:
            raise TemplateNotFound(template)
        elif isinstance(rv, string_types):
            return rv, None, None
        return rv


class PrefixLoader(BaseLoader):
    """A loader that is passed a dict of loaders where each loader is bound
    to a prefix.  The prefix is delimited from the template by a slash per
    default, which can be changed by setting the `delimiter` argument to
    something else::

        loader = PrefixLoader({
            'app1':     PackageLoader('mypackage.app1'),
            'app2':     PackageLoader('mypackage.app2')
        })

    By loading ``'app1/index.html'`` the file from the app1 package is loaded,
    by loading ``'app2/index.html'`` the file from the second.
    """

    def __init__(self, mapping, delimiter='/'):
        self.mapping = mapping
        self.delimiter = delimiter

    def get_loader(self, template):
        try:
            prefix, name = template.split(self.delimiter, 1)
            loader = self.mapping[prefix]
        except (ValueError, KeyError):
            raise TemplateNotFound(template)
        return loader, name

    def get_source(self, environment, template):
        loader, name = self.get_loader(template)
        try:
            return loader.get_source(environment, name)
        except TemplateNotFound:
            # re-raise the exception with the correct fileame here.
            # (the one that includes the prefix)
            raise TemplateNotFound(template)

    @internalcode
    def load(self, environment, name, globals=None):
        loader, local_name = self.get_loader(name)
        try:
            return loader.load(environment, local_name, globals)
        except TemplateNotFound:
            # re-raise the exception with the correct fileame here.
            # (the one that includes the prefix)
            raise TemplateNotFound(name)

    def list_templates(self):
        result = []
        for prefix, loader in iteritems(self.mapping):
            for template in loader.list_templates():
                result.append(prefix + self.delimiter + template)
        return result


class ChoiceLoader(BaseLoader):
    """This loader works like the `PrefixLoader` just that no prefix is
    specified.  If a template could not be found by one loader the next one
    is tried.

    >>> loader = ChoiceLoader([
    ...     FileSystemLoader('/path/to/user/templates'),
    ...     FileSystemLoader('/path/to/system/templates')
    ... ])

    This is useful if you want to allow users to override builtin templates
    from a different location.
    """

    def __init__(self, loaders):
        self.loaders = loaders

    def get_source(self, environment, template):
        for loader in self.loaders:
            try:
                return loader.get_source(environment, template)
            except TemplateNotFound:
                pass
        raise TemplateNotFound(template)

    @internalcode
    def load(self, environment, name, globals=None):
        for loader in self.loaders:
            try:
                return loader.load(environment, name, globals)
            except TemplateNotFound:
                pass
        raise TemplateNotFound(name)

    def list_templates(self):
        found = set()
        for loader in self.loaders:
            found.update(loader.list_templates())
        return sorted(found)


class _TemplateModule(ModuleType):
    """Like a normal module but with support for weak references"""


class ModuleLoader(BaseLoader):
    """This loader loads templates from precompiled templates.

    Example usage:

    >>> loader = ChoiceLoader([
    ...     ModuleLoader('/path/to/compiled/templates'),
    ...     FileSystemLoader('/path/to/templates')
    ... ])

    Templates can be precompiled with :meth:`Environment.compile_templates`.
    """

    has_source_access = False

    def __init__(self, path):
        package_name = '_jinja2_module_templates_%x' % id(self)

        # create a fake module that looks for the templates in the
        # path given.
        mod = _TemplateModule(package_name)
        if isinstance(path, string_types):
            path = [path]
        else:
            path = list(path)
        mod.__path__ = path

        sys.modules[package_name] = weakref.proxy(mod,
            lambda x: sys.modules.pop(package_name, None))

        # the only strong reference, the sys.modules entry is weak
        # so that the garbage collector can remove it once the
        # loader that created it goes out of business.
        self.module = mod
        self.package_name = package_name

    @staticmethod
    def get_template_key(name):
        return 'tmpl_' + sha1(name.encode('utf-8')).hexdigest()

    @staticmethod
    def get_module_filename(name):
        return ModuleLoader.get_template_key(name) + '.py'

    @internalcode
    def load(self, environment, name, globals=None):
        key = self.get_template_key(name)
        module = '%s.%s' % (self.package_name, key)
        mod = getattr(self.module, module, None)
        if mod is None:
            try:
                mod = __import__(module, None, None, ['root'])
            except ImportError:
                raise TemplateNotFound(name)

            # remove the entry from sys.modules, we only want the attribute
            # on the module object we have stored on the loader.
            sys.modules.pop(module, None)

        return environment.template_class.from_module_dict(
            environment, mod.__dict__, globals)