:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
"""
+import os
import sys
from jinja2 import nodes
from jinja2.defaults import *
`None` implicitly into an empty string here.
`autoescape`
- If set to true the XML/HTML autoescaping feature is enabled.
- For more details about auto escaping see
- :class:`~jinja2.utils.Markup`.
+ If set to true the XML/HTML autoescaping feature is enabled by
+ default. For more details about auto escaping see
+ :class:`~jinja2.utils.Markup`. As of Jinja 2.4 this can also
+ be a callable that is passed the template name and has to
+ return `True` or `False` depending on autoescape should be
+ enabled by default.
+
+ .. versionchanged:: 2.4
+ `autoescape` can now be a function
`loader`
The template loader for this environment.
#: if this environment is sandboxed. Modifying this variable won't make
#: the environment sandboxed though. For a real sandboxed environment
- #: have a look at jinja2.sandbox
+ #: have a look at jinja2.sandbox. This flag alone controls the code
+ #: generation by the compiler.
sandboxed = False
#: True if the environment is just an overlay
_environment_sanity_check(self)
+ def add_extension(self, extension):
+ """Adds an extension after the environment was created.
+
+ .. versionadded:: 2.5
+ """
+ self.extensions.update(load_extensions(self, [extension]))
+
def extend(self, **attributes):
"""Add the items to the instance of the environment if they do not exist
yet. This is used by :ref:`extensions <writing-extensions>` to register
for key, value in self.extensions.iteritems():
rv.extensions[key] = value.bind(rv)
if extensions is not missing:
- rv.extensions.update(load_extensions(extensions))
+ rv.extensions.update(load_extensions(rv, extensions))
return _environment_sanity_check(rv)
lexer = property(get_lexer, doc="The lexer for this environment.")
+ def iter_extensions(self):
+ """Iterates over the extensions by priority."""
+ return iter(sorted(self.extensions.values(),
+ key=lambda x: x.priority))
+
def getitem(self, obj, argument):
"""Get an item or attribute of an object but prefer the item."""
try:
if isinstance(argument, basestring):
try:
attr = str(argument)
- except:
+ except Exception:
pass
else:
try:
because there you usually only want the actual source tokenized.
"""
return reduce(lambda s, e: e.preprocess(s, name, filename),
- self.extensions.itervalues(), unicode(source))
+ self.iter_extensions(), unicode(source))
def _tokenize(self, source, name, filename=None, state=None):
"""Called by the parser to do the preprocessing and filtering
"""
source = self.preprocess(source, name, filename)
stream = self.lexer.tokenize(source, name, filename, state)
- for ext in self.extensions.itervalues():
+ for ext in self.iter_extensions():
stream = ext.filter_stream(stream)
if not isinstance(stream, TokenStream):
stream = TokenStream(stream, name, filename)
return stream
+ def _generate(self, source, name, filename, defer_init=False):
+ """Internal hook that can be overriden to hook a different generate
+ method in.
+
+ .. versionadded:: 2.5
+ """
+ return generate(source, self, name, filename, defer_init=defer_init)
+
+ def _compile(self, source, filename):
+ """Internal hook that can be overriden to hook a different compile
+ method in.
+
+ .. versionadded:: 2.5
+ """
+ return compile(source, filename, 'exec')
+
@internalcode
- def compile(self, source, name=None, filename=None, raw=False):
+ def compile(self, source, name=None, filename=None, raw=False,
+ defer_init=False):
"""Compile a node or template source code. The `name` parameter is
the load name of the template after it was joined using
:meth:`join_path` if necessary, not the filename on the file system.
parameter is `True` the return value will be a string with python
code equivalent to the bytecode returned otherwise. This method is
mainly used internally.
+
+ `defer_init` is use internally to aid the module code generator. This
+ causes the generated code to be able to import without the global
+ environment variable to be set.
+
+ .. versionadded:: 2.4
+ `defer_init` parameter added.
"""
source_hint = None
try:
source = self._parse(source, name, filename)
if self.optimized:
source = optimize(source, self)
- source = generate(source, self, name, filename)
+ source = self._generate(source, name, filename,
+ defer_init=defer_init)
if raw:
return source
if filename is None:
filename = '<template>'
else:
filename = _encode_filename(filename)
- return compile(source, filename, 'exec')
+ return self._compile(source, filename)
except TemplateSyntaxError:
exc_info = sys.exc_info()
self.handle_exception(exc_info, source_hint=source)
raise TemplateSyntaxError('chunk after expression',
parser.stream.current.lineno,
None, None)
+ expr.set_environment(self)
except TemplateSyntaxError:
exc_info = sys.exc_info()
if exc_info is not None:
template = self.from_string(nodes.Template(body, lineno=1))
return TemplateExpression(template, undefined_to_none)
+ def compile_templates(self, target, extensions=None, filter_func=None,
+ zip='deflated', log_function=None,
+ ignore_errors=True, py_compile=False):
+ """Finds all the templates the loader can find, compiles them
+ and stores them in `target`. If `zip` is `None`, instead of in a
+ zipfile, the templates will be will be stored in a directory.
+ By default a deflate zip algorithm is used, to switch to
+ the stored algorithm, `zip` can be set to ``'stored'``.
+
+ `extensions` and `filter_func` are passed to :meth:`list_templates`.
+ Each template returned will be compiled to the target folder or
+ zipfile.
+
+ By default template compilation errors are ignored. In case a
+ log function is provided, errors are logged. If you want template
+ syntax errors to abort the compilation you can set `ignore_errors`
+ to `False` and you will get an exception on syntax errors.
+
+ If `py_compile` is set to `True` .pyc files will be written to the
+ target instead of standard .py files.
+
+ .. versionadded:: 2.4
+ """
+ from jinja2.loaders import ModuleLoader
+
+ if log_function is None:
+ log_function = lambda x: None
+
+ if py_compile:
+ import imp, marshal
+ py_header = imp.get_magic() + \
+ u'\xff\xff\xff\xff'.encode('iso-8859-15')
+
+ def write_file(filename, data, mode):
+ if zip:
+ info = ZipInfo(filename)
+ info.external_attr = 0755 << 16L
+ zip_file.writestr(info, data)
+ else:
+ f = open(os.path.join(target, filename), mode)
+ try:
+ f.write(data)
+ finally:
+ f.close()
+
+ if zip is not None:
+ from zipfile import ZipFile, ZipInfo, ZIP_DEFLATED, ZIP_STORED
+ zip_file = ZipFile(target, 'w', dict(deflated=ZIP_DEFLATED,
+ stored=ZIP_STORED)[zip])
+ log_function('Compiling into Zip archive "%s"' % target)
+ else:
+ if not os.path.isdir(target):
+ os.makedirs(target)
+ log_function('Compiling into folder "%s"' % target)
+
+ try:
+ for name in self.list_templates(extensions, filter_func):
+ source, filename, _ = self.loader.get_source(self, name)
+ try:
+ code = self.compile(source, name, filename, True, True)
+ except TemplateSyntaxError, e:
+ if not ignore_errors:
+ raise
+ log_function('Could not compile "%s": %s' % (name, e))
+ continue
+
+ filename = ModuleLoader.get_module_filename(name)
+
+ if py_compile:
+ c = self._compile(code, _encode_filename(filename))
+ write_file(filename + 'c', py_header +
+ marshal.dumps(c), 'wb')
+ log_function('Byte-compiled "%s" as %s' %
+ (name, filename + 'c'))
+ else:
+ write_file(filename, code, 'w')
+ log_function('Compiled "%s" as %s' % (name, filename))
+ finally:
+ if zip:
+ zip_file.close()
+
+ log_function('Finished compiling templates')
+
+ def list_templates(self, extensions=None, filter_func=None):
+ """Returns a list of templates for this environment. This requires
+ that the loader supports the loader's
+ :meth:`~BaseLoader.list_templates` method.
+
+ If there are other files in the template folder besides the
+ actual templates, the returned list can be filtered. There are two
+ ways: either `extensions` is set to a list of file extensions for
+ templates, or a `filter_func` can be provided which is a callable that
+ is passed a template name and should return `True` if it should end up
+ in the result list.
+
+ If the loader does not support that, a :exc:`TypeError` is raised.
+
+ .. versionadded:: 2.4
+ """
+ x = self.loader.list_templates()
+ if extensions is not None:
+ if filter_func is not None:
+ raise TypeError('either extensions or filter_func '
+ 'can be passed, but not both')
+ filter_func = lambda x: '.' in x and \
+ x.rsplit('.', 1)[1] in extensions
+ if filter_func is not None:
+ x = filter(filter_func, x)
+ return x
+
def handle_exception(self, exc_info=None, rendered=False, source_hint=None):
"""Exception handling helper. This is used internally to either raise
rewritten exceptions or return a rendered traceback for the template.
If the template does not exist a :exc:`TemplateNotFound` exception is
raised.
+
+ .. versionchanged:: 2.4
+ If `name` is a :class:`Template` object it is returned from the
+ function unchanged.
"""
+ if isinstance(name, Template):
+ return name
if parent is not None:
name = self.join_path(name, parent)
return self._load_template(name, self.make_globals(globals))
raise a :exc:`TemplatesNotFound` exception.
.. versionadded:: 2.3
+
+ .. versionchanged:: 2.4
+ If `names` contains a :class:`Template` object it is returned
+ from the function unchanged.
"""
if not names:
raise TemplatesNotFound(message=u'Tried to select from an empty list '
u'of templates.')
globals = self.make_globals(globals)
for name in names:
+ if isinstance(name, Template):
+ return name
if parent is not None:
name = self.join_path(name, parent)
try:
@internalcode
def get_or_select_template(self, template_name_or_list,
parent=None, globals=None):
- """
- Does a typecheck and dispatches to :meth:`select_template` if an
- iterable of template names is given, otherwise to :meth:`get_template`.
+ """Does a typecheck and dispatches to :meth:`select_template`
+ if an iterable of template names is given, otherwise to
+ :meth:`get_template`.
.. versionadded:: 2.3
"""
if isinstance(template_name_or_list, basestring):
return self.get_template(template_name_or_list, parent, globals)
+ elif isinstance(template_name_or_list, Template):
+ return template_name_or_list
return self.select_template(template_name_or_list, parent, globals)
def from_string(self, source, globals=None, template_class=None):
"""Creates a template object from compiled code and the globals. This
is used by the loaders and environment to create a template object.
"""
- t = object.__new__(cls)
namespace = {
- 'environment': environment,
- '__jinja_template__': t
+ 'environment': environment,
+ '__file__': code.co_filename
}
exec code in namespace
+ rv = cls._from_namespace(environment, namespace, globals)
+ rv._uptodate = uptodate
+ return rv
+
+ @classmethod
+ def from_module_dict(cls, environment, module_dict, globals):
+ """Creates a template object from a module. This is used by the
+ module loader to create a template object.
+
+ .. versionadded:: 2.4
+ """
+ return cls._from_namespace(environment, module_dict, globals)
+
+ @classmethod
+ def _from_namespace(cls, environment, namespace, globals):
+ t = object.__new__(cls)
t.environment = environment
t.globals = globals
t.name = namespace['name']
- t.filename = code.co_filename
+ t.filename = namespace['__file__']
t.blocks = namespace['blocks']
# render function and module
# debug and loader helpers
t._debug_info = namespace['debug_info']
- t._uptodate = uptodate
+ t._uptodate = None
+
+ # store the reference
+ namespace['environment'] = environment
+ namespace['__jinja_template__'] = t
return t
vars = dict(*args, **kwargs)
try:
return concat(self.root_render_func(self.new_context(vars)))
- except:
+ except Exception:
exc_info = sys.exc_info()
return self.environment.handle_exception(exc_info, True)
try:
for event in self.root_render_func(self.new_context(vars)):
yield event
- except:
+ except Exception:
exc_info = sys.exc_info()
else:
return
projects / libfirm / blobdiff