From 81aec74062b5c629b3408f7f3d18343ec0bbcab8 Mon Sep 17 00:00:00 2001 From: IRIS YANG Date: Fri, 17 Jul 2020 04:30:05 +0000 Subject: Revert "Import external/python/jinja into master" This reverts commit e868444bb65b7ae2a025b1c8c7854a8c4f2f58c1. Reason for revert: Since build will failed. We might need to wait b/160731429 fixed and submit it again. Change-Id: I56449de779d11c13cdfe1243b9a9726f94e55b33 --- src/jinja2/__init__.py | 43 -- src/jinja2/_identifier.py | 6 - src/jinja2/asyncfilters.py | 157 ---- src/jinja2/asyncsupport.py | 249 ------- src/jinja2/bccache.py | 345 --------- src/jinja2/compiler.py | 1754 -------------------------------------------- src/jinja2/constants.py | 20 - src/jinja2/debug.py | 261 ------- src/jinja2/defaults.py | 42 -- src/jinja2/environment.py | 1331 --------------------------------- src/jinja2/exceptions.py | 147 ---- src/jinja2/ext.py | 700 ------------------ src/jinja2/filters.py | 1361 ---------------------------------- src/jinja2/idtracking.py | 289 -------- src/jinja2/lexer.py | 801 -------------------- src/jinja2/loaders.py | 566 -------------- src/jinja2/meta.py | 98 --- src/jinja2/nativetypes.py | 93 --- src/jinja2/nodes.py | 1052 -------------------------- src/jinja2/optimizer.py | 40 - src/jinja2/parser.py | 934 ----------------------- src/jinja2/runtime.py | 919 ----------------------- src/jinja2/sandbox.py | 419 ----------- src/jinja2/tests.py | 211 ------ src/jinja2/utils.py | 666 ----------------- src/jinja2/visitor.py | 79 -- 26 files changed, 12583 deletions(-) delete mode 100644 src/jinja2/__init__.py delete mode 100644 src/jinja2/_identifier.py delete mode 100644 src/jinja2/asyncfilters.py delete mode 100644 src/jinja2/asyncsupport.py delete mode 100644 src/jinja2/bccache.py delete mode 100644 src/jinja2/compiler.py delete mode 100644 src/jinja2/constants.py delete mode 100644 src/jinja2/debug.py delete mode 100644 src/jinja2/defaults.py delete mode 100644 src/jinja2/environment.py delete mode 100644 src/jinja2/exceptions.py delete mode 100644 src/jinja2/ext.py delete mode 100644 src/jinja2/filters.py delete mode 100644 src/jinja2/idtracking.py delete mode 100644 src/jinja2/lexer.py delete mode 100644 src/jinja2/loaders.py delete mode 100644 src/jinja2/meta.py delete mode 100644 src/jinja2/nativetypes.py delete mode 100644 src/jinja2/nodes.py delete mode 100644 src/jinja2/optimizer.py delete mode 100644 src/jinja2/parser.py delete mode 100644 src/jinja2/runtime.py delete mode 100644 src/jinja2/sandbox.py delete mode 100644 src/jinja2/tests.py delete mode 100644 src/jinja2/utils.py delete mode 100644 src/jinja2/visitor.py (limited to 'src') diff --git a/src/jinja2/__init__.py b/src/jinja2/__init__.py deleted file mode 100644 index 8fa05183..00000000 --- a/src/jinja2/__init__.py +++ /dev/null @@ -1,43 +0,0 @@ -"""Jinja is a template engine written in pure Python. It provides a -non-XML syntax that supports inline expressions and an optional -sandboxed environment. -""" -from markupsafe import escape -from markupsafe import Markup - -from .bccache import BytecodeCache -from .bccache import FileSystemBytecodeCache -from .bccache import MemcachedBytecodeCache -from .environment import Environment -from .environment import Template -from .exceptions import TemplateAssertionError -from .exceptions import TemplateError -from .exceptions import TemplateNotFound -from .exceptions import TemplateRuntimeError -from .exceptions import TemplatesNotFound -from .exceptions import TemplateSyntaxError -from .exceptions import UndefinedError -from .filters import contextfilter -from .filters import environmentfilter -from .filters import evalcontextfilter -from .loaders import BaseLoader -from .loaders import ChoiceLoader -from .loaders import DictLoader -from .loaders import FileSystemLoader -from .loaders import FunctionLoader -from .loaders import ModuleLoader -from .loaders import PackageLoader -from .loaders import PrefixLoader -from .runtime import ChainableUndefined -from .runtime import DebugUndefined -from .runtime import make_logging_undefined -from .runtime import StrictUndefined -from .runtime import Undefined -from .utils import clear_caches -from .utils import contextfunction -from .utils import environmentfunction -from .utils import evalcontextfunction -from .utils import is_undefined -from .utils import select_autoescape - -__version__ = "3.0.0a1" diff --git a/src/jinja2/_identifier.py b/src/jinja2/_identifier.py deleted file mode 100644 index 224d5449..00000000 --- a/src/jinja2/_identifier.py +++ /dev/null @@ -1,6 +0,0 @@ -import re - -# generated by scripts/generate_identifier_pattern.py -pattern = re.compile( - r"[\w·̀-ͯ·҃-֑҇-ׇֽֿׁׂׅׄؐ-ًؚ-ٰٟۖ-ۜ۟-۪ۤۧۨ-ܑۭܰ-݊ަ-ް߫-߳ࠖ-࠙ࠛ-ࠣࠥ-ࠧࠩ-࡙࠭-࡛ࣔ-ࣣ࣡-ःऺ-़ा-ॏ॑-ॗॢॣঁ-ঃ়া-ৄেৈো-্ৗৢৣਁ-ਃ਼ਾ-ੂੇੈੋ-੍ੑੰੱੵઁ-ઃ઼ા-ૅે-ૉો-્ૢૣଁ-ଃ଼ା-ୄେୈୋ-୍ୖୗୢୣஂா-ூெ-ைொ-்ௗఀ-ఃా-ౄె-ైొ-్ౕౖౢౣಁ-ಃ಼ಾ-ೄೆ-ೈೊ-್ೕೖೢೣഁ-ഃാ-ൄെ-ൈൊ-്ൗൢൣංඃ්ා-ුූෘ-ෟෲෳัิ-ฺ็-๎ັິ-ູົຼ່-ໍ༹༘༙༵༷༾༿ཱ-྄྆྇ྍ-ྗྙ-ྼ࿆ါ-ှၖ-ၙၞ-ၠၢ-ၤၧ-ၭၱ-ၴႂ-ႍႏႚ-ႝ፝-፟ᜒ-᜔ᜲ-᜴ᝒᝓᝲᝳ឴-៓៝᠋-᠍ᢅᢆᢩᤠ-ᤫᤰ-᤻ᨗ-ᨛᩕ-ᩞ᩠-᩿᩼᪰-᪽ᬀ-ᬄ᬴-᭄᭫-᭳ᮀ-ᮂᮡ-ᮭ᯦-᯳ᰤ-᰷᳐-᳔᳒-᳨᳭ᳲ-᳴᳸᳹᷀-᷵᷻-᷿‿⁀⁔⃐-⃥⃜⃡-⃰℘℮⳯-⵿⳱ⷠ-〪ⷿ-゙゚〯꙯ꙴ-꙽ꚞꚟ꛰꛱ꠂ꠆ꠋꠣ-ꠧꢀꢁꢴ-ꣅ꣠-꣱ꤦ-꤭ꥇ-꥓ꦀ-ꦃ꦳-꧀ꧥꨩ-ꨶꩃꩌꩍꩻ-ꩽꪰꪲ-ꪴꪷꪸꪾ꪿꫁ꫫ-ꫯꫵ꫶ꯣ-ꯪ꯬꯭ﬞ︀-️︠-︯︳︴﹍-﹏＿𐇽𐋠𐍶-𐍺𐨁-𐨃𐨅𐨆𐨌-𐨏𐨸-𐨿𐨺𐫦𐫥𑀀-𑀂𑀸-𑁆𑁿-𑂂𑂰-𑂺𑄀-𑄂𑄧-𑅳𑄴𑆀-𑆂𑆳-𑇊𑇀-𑇌𑈬-𑈷𑈾𑋟-𑋪𑌀-𑌃𑌼𑌾-𑍄𑍇𑍈𑍋-𑍍𑍗𑍢𑍣𑍦-𑍬𑍰-𑍴𑐵-𑑆𑒰-𑓃𑖯-𑖵𑖸-𑗀𑗜𑗝𑘰-𑙀𑚫-𑚷𑜝-𑜫𑰯-𑰶𑰸-𑰿𑲒-𑲧𑲩-𑲶𖫰-𖫴𖬰-𖬶𖽑-𖽾𖾏-𖾒𛲝𛲞𝅥-𝅩𝅭-𝅲𝅻-𝆂𝆅-𝆋𝆪-𝆭𝉂-𝉄𝨀-𝨶𝨻-𝩬𝩵𝪄𝪛-𝪟𝪡-𝪯𞀀-𞀆𞀈-𞀘𞀛-𞀡𞀣𞀤𞀦-𞣐𞀪-𞣖𞥄-𞥊󠄀-󠇯]+" # noqa: B950 -) diff --git a/src/jinja2/asyncfilters.py b/src/jinja2/asyncfilters.py deleted file mode 100644 index 0aad12c8..00000000 --- a/src/jinja2/asyncfilters.py +++ /dev/null @@ -1,157 +0,0 @@ -from functools import wraps - -from . import filters -from .asyncsupport import auto_aiter -from .asyncsupport import auto_await - - -async def auto_to_seq(value): - seq = [] - if hasattr(value, "__aiter__"): - async for item in value: - seq.append(item) - else: - for item in value: - seq.append(item) - return seq - - -async def async_select_or_reject(args, kwargs, modfunc, lookup_attr): - seq, func = filters.prepare_select_or_reject(args, kwargs, modfunc, lookup_attr) - if seq: - async for item in auto_aiter(seq): - if func(item): - yield item - - -def dualfilter(normal_filter, async_filter): - wrap_evalctx = False - if getattr(normal_filter, "environmentfilter", False) is True: - - def is_async(args): - return args[0].is_async - - wrap_evalctx = False - else: - has_evalctxfilter = getattr(normal_filter, "evalcontextfilter", False) is True - has_ctxfilter = getattr(normal_filter, "contextfilter", False) is True - wrap_evalctx = not has_evalctxfilter and not has_ctxfilter - - def is_async(args): - return args[0].environment.is_async - - @wraps(normal_filter) - def wrapper(*args, **kwargs): - b = is_async(args) - if wrap_evalctx: - args = args[1:] - if b: - return async_filter(*args, **kwargs) - return normal_filter(*args, **kwargs) - - if wrap_evalctx: - wrapper.evalcontextfilter = True - - wrapper.asyncfiltervariant = True - - return wrapper - - -def asyncfiltervariant(original): - def decorator(f): - return dualfilter(original, f) - - return decorator - - -@asyncfiltervariant(filters.do_first) -async def do_first(environment, seq): - try: - return await auto_aiter(seq).__anext__() - except StopAsyncIteration: - return environment.undefined("No first item, sequence was empty.") - - -@asyncfiltervariant(filters.do_groupby) -async def do_groupby(environment, value, attribute): - expr = filters.make_attrgetter(environment, attribute) - return [ - filters._GroupTuple(key, await auto_to_seq(values)) - for key, values in filters.groupby( - sorted(await auto_to_seq(value), key=expr), expr - ) - ] - - -@asyncfiltervariant(filters.do_join) -async def do_join(eval_ctx, value, d="", attribute=None): - return filters.do_join(eval_ctx, await auto_to_seq(value), d, attribute) - - -@asyncfiltervariant(filters.do_list) -async def do_list(value): - return await auto_to_seq(value) - - -@asyncfiltervariant(filters.do_reject) -async def do_reject(*args, **kwargs): - return async_select_or_reject(args, kwargs, lambda x: not x, False) - - -@asyncfiltervariant(filters.do_rejectattr) -async def do_rejectattr(*args, **kwargs): - return async_select_or_reject(args, kwargs, lambda x: not x, True) - - -@asyncfiltervariant(filters.do_select) -async def do_select(*args, **kwargs): - return async_select_or_reject(args, kwargs, lambda x: x, False) - - -@asyncfiltervariant(filters.do_selectattr) -async def do_selectattr(*args, **kwargs): - return async_select_or_reject(args, kwargs, lambda x: x, True) - - -@asyncfiltervariant(filters.do_map) -async def do_map(*args, **kwargs): - seq, func = filters.prepare_map(args, kwargs) - if seq: - async for item in auto_aiter(seq): - yield await auto_await(func(item)) - - -@asyncfiltervariant(filters.do_sum) -async def do_sum(environment, iterable, attribute=None, start=0): - rv = start - if attribute is not None: - func = filters.make_attrgetter(environment, attribute) - else: - - def func(x): - return x - - async for item in auto_aiter(iterable): - rv += func(item) - return rv - - -@asyncfiltervariant(filters.do_slice) -async def do_slice(value, slices, fill_with=None): - return filters.do_slice(await auto_to_seq(value), slices, fill_with) - - -ASYNC_FILTERS = { - "first": do_first, - "groupby": do_groupby, - "join": do_join, - "list": do_list, - # we intentionally do not support do_last because it may not be safe in async - "reject": do_reject, - "rejectattr": do_rejectattr, - "map": do_map, - "select": do_select, - "selectattr": do_selectattr, - "sum": do_sum, - "slice": do_slice, -} diff --git a/src/jinja2/asyncsupport.py b/src/jinja2/asyncsupport.py deleted file mode 100644 index e46a85a3..00000000 --- a/src/jinja2/asyncsupport.py +++ /dev/null @@ -1,249 +0,0 @@ -"""The code for async support. Importing this patches Jinja.""" -import asyncio -import inspect -from functools import update_wrapper - -from markupsafe import Markup - -from .environment import TemplateModule -from .runtime import LoopContext -from .utils import concat -from .utils import internalcode -from .utils import missing - - -async def concat_async(async_gen): - rv = [] - - async def collect(): - async for event in async_gen: - rv.append(event) - - await collect() - return concat(rv) - - -async def generate_async(self, *args, **kwargs): - vars = dict(*args, **kwargs) - try: - async for event in self.root_render_func(self.new_context(vars)): - yield event - except Exception: - yield self.environment.handle_exception() - - -def wrap_generate_func(original_generate): - def _convert_generator(self, loop, args, kwargs): - async_gen = self.generate_async(*args, **kwargs) - try: - while 1: - yield loop.run_until_complete(async_gen.__anext__()) - except StopAsyncIteration: - pass - - def generate(self, *args, **kwargs): - if not self.environment.is_async: - return original_generate(self, *args, **kwargs) - return _convert_generator(self, asyncio.get_event_loop(), args, kwargs) - - return update_wrapper(generate, original_generate) - - -async def render_async(self, *args, **kwargs): - if not self.environment.is_async: - raise RuntimeError("The environment was not created with async mode enabled.") - - vars = dict(*args, **kwargs) - ctx = self.new_context(vars) - - try: - return await concat_async(self.root_render_func(ctx)) - except Exception: - return self.environment.handle_exception() - - -def wrap_render_func(original_render): - def render(self, *args, **kwargs): - if not self.environment.is_async: - return original_render(self, *args, **kwargs) - loop = asyncio.get_event_loop() - return loop.run_until_complete(self.render_async(*args, **kwargs)) - - return update_wrapper(render, original_render) - - -def wrap_block_reference_call(original_call): - @internalcode - async def async_call(self): - rv = await concat_async(self._stack[self._depth](self._context)) - if self._context.eval_ctx.autoescape: - rv = Markup(rv) - return rv - - @internalcode - def __call__(self): - if not self._context.environment.is_async: - return original_call(self) - return async_call(self) - - return update_wrapper(__call__, original_call) - - -def wrap_macro_invoke(original_invoke): - @internalcode - async def async_invoke(self, arguments, autoescape): - rv = await self._func(*arguments) - if autoescape: - rv = Markup(rv) - return rv - - @internalcode - def _invoke(self, arguments, autoescape): - if not self._environment.is_async: - return original_invoke(self, arguments, autoescape) - return async_invoke(self, arguments, autoescape) - - return update_wrapper(_invoke, original_invoke) - - -@internalcode -async def get_default_module_async(self): - if self._module is not None: - return self._module - self._module = rv = await self.make_module_async() - return rv - - -def wrap_default_module(original_default_module): - @internalcode - def _get_default_module(self, ctx=None): - if self.environment.is_async: - raise RuntimeError("Template module attribute is unavailable in async mode") - return original_default_module(self, ctx) - - return _get_default_module - - -async def make_module_async(self, vars=None, shared=False, locals=None): - context = self.new_context(vars, shared, locals) - body_stream = [] - async for item in self.root_render_func(context): - body_stream.append(item) - return TemplateModule(self, context, body_stream) - - -def patch_template(): - from . import Template - - Template.generate = wrap_generate_func(Template.generate) - Template.generate_async = update_wrapper(generate_async, Template.generate_async) - Template.render_async = update_wrapper(render_async, Template.render_async) - Template.render = wrap_render_func(Template.render) - Template._get_default_module = wrap_default_module(Template._get_default_module) - Template._get_default_module_async = get_default_module_async - Template.make_module_async = update_wrapper( - make_module_async, Template.make_module_async - ) - - -def patch_runtime(): - from .runtime import BlockReference, Macro - - BlockReference.__call__ = wrap_block_reference_call(BlockReference.__call__) - Macro._invoke = wrap_macro_invoke(Macro._invoke) - - -def patch_filters(): - from .filters import FILTERS - from .asyncfilters import ASYNC_FILTERS - - FILTERS.update(ASYNC_FILTERS) - - -def patch_all(): - patch_template() - patch_runtime() - patch_filters() - - -async def auto_await(value): - if inspect.isawaitable(value): - return await value - return value - - -async def auto_aiter(iterable): - if hasattr(iterable, "__aiter__"): - async for item in iterable: - yield item - return - for item in iterable: - yield item - - -class AsyncLoopContext(LoopContext): - _to_iterator = staticmethod(auto_aiter) - - @property - async def length(self): - if self._length is not None: - return self._length - - try: - self._length = len(self._iterable) - except TypeError: - iterable = [x async for x in self._iterator] - self._iterator = self._to_iterator(iterable) - self._length = len(iterable) + self.index + (self._after is not missing) - - return self._length - - @property - async def revindex0(self): - return await self.length - self.index - - @property - async def revindex(self): - return await self.length - self.index0 - - async def _peek_next(self): - if self._after is not missing: - return self._after - - try: - self._after = await self._iterator.__anext__() - except StopAsyncIteration: - self._after = missing - - return self._after - - @property - async def last(self): - return await self._peek_next() is missing - - @property - async def nextitem(self): - rv = await self._peek_next() - - if rv is missing: - return self._undefined("there is no next item") - - return rv - - def __aiter__(self): - return self - - async def __anext__(self): - if self._after is not missing: - rv = self._after - self._after = missing - else: - rv = await self._iterator.__anext__() - - self.index0 += 1 - self._before = self._current - self._current = rv - return rv, self - - -patch_all() diff --git a/src/jinja2/bccache.py b/src/jinja2/bccache.py deleted file mode 100644 index 7ddcf405..00000000 --- a/src/jinja2/bccache.py +++ /dev/null @@ -1,345 +0,0 @@ -"""The optional bytecode cache system. This is useful if you have very -complex template situations and the compilation of all those templates -slows down your application too much. - -Situations where this is useful are often forking web applications that -are initialized on the first request. -""" -import errno -import fnmatch -import marshal -import os -import pickle -import stat -import sys -import tempfile -from hashlib import sha1 -from io import BytesIO - -from .utils import open_if_exists - -bc_version = 5 -# Magic bytes to identify Jinja bytecode cache files. Contains the -# Python major and minor version to avoid loading incompatible bytecode -# if a project upgrades its Python version. -bc_magic = ( - b"j2" - + pickle.dumps(bc_version, 2) - + pickle.dumps((sys.version_info[0] << 24) | sys.version_info[1], 2) -) - - -class Bucket: - """Buckets are used to store the bytecode for one template. It's created - and initialized by the bytecode cache and passed to the loading functions. - - The buckets get an internal checksum from the cache assigned and use this - to automatically reject outdated cache material. Individual bytecode - cache subclasses don't have to care about cache invalidation. - """ - - def __init__(self, environment, key, checksum): - self.environment = environment - self.key = key - self.checksum = checksum - self.reset() - - def reset(self): - """Resets the bucket (unloads the bytecode).""" - self.code = None - - def load_bytecode(self, f): - """Loads bytecode from a file or file like object.""" - # make sure the magic header is correct - magic = f.read(len(bc_magic)) - if magic != bc_magic: - self.reset() - return - # the source code of the file changed, we need to reload - checksum = pickle.load(f) - if self.checksum != checksum: - self.reset() - return - # if marshal_load fails then we need to reload - try: - self.code = marshal.load(f) - except (EOFError, ValueError, TypeError): - self.reset() - return - - def write_bytecode(self, f): - """Dump the bytecode into the file or file like object passed.""" - if self.code is None: - raise TypeError("can't write empty bucket") - f.write(bc_magic) - pickle.dump(self.checksum, f, 2) - marshal.dump(self.code, f) - - def bytecode_from_string(self, string): - """Load bytecode from a string.""" - self.load_bytecode(BytesIO(string)) - - def bytecode_to_string(self): - """Return the bytecode as string.""" - out = BytesIO() - self.write_bytecode(out) - return out.getvalue() - - -class BytecodeCache: - """To implement your own bytecode cache you have to subclass this class - and override :meth:`load_bytecode` and :meth:`dump_bytecode`. Both of - these methods are passed a :class:`~jinja2.bccache.Bucket`. - - A very basic bytecode cache that saves the bytecode on the file system:: - - from os import path - - class MyCache(BytecodeCache): - - def __init__(self, directory): - self.directory = directory - - def load_bytecode(self, bucket): - filename = path.join(self.directory, bucket.key) - if path.exists(filename): - with open(filename, 'rb') as f: - bucket.load_bytecode(f) - - def dump_bytecode(self, bucket): - filename = path.join(self.directory, bucket.key) - with open(filename, 'wb') as f: - bucket.write_bytecode(f) - - A more advanced version of a filesystem based bytecode cache is part of - Jinja. - """ - - def load_bytecode(self, bucket): - """Subclasses have to override this method to load bytecode into a - bucket. If they are not able to find code in the cache for the - bucket, it must not do anything. - """ - raise NotImplementedError() - - def dump_bytecode(self, bucket): - """Subclasses have to override this method to write the bytecode - from a bucket back to the cache. If it unable to do so it must not - fail silently but raise an exception. - """ - raise NotImplementedError() - - def clear(self): - """Clears the cache. This method is not used by Jinja but should be - implemented to allow applications to clear the bytecode cache used - by a particular environment. - """ - - def get_cache_key(self, name, filename=None): - """Returns the unique hash key for this template name.""" - hash = sha1(name.encode("utf-8")) - if filename is not None: - filename = "|" + filename - if isinstance(filename, str): - filename = filename.encode("utf-8") - hash.update(filename) - return hash.hexdigest() - - def get_source_checksum(self, source): - """Returns a checksum for the source.""" - return sha1(source.encode("utf-8")).hexdigest() - - def get_bucket(self, environment, name, filename, source): - """Return a cache bucket for the given template. All arguments are - mandatory but filename may be `None`. - """ - key = self.get_cache_key(name, filename) - checksum = self.get_source_checksum(source) - bucket = Bucket(environment, key, checksum) - self.load_bytecode(bucket) - return bucket - - def set_bucket(self, bucket): - """Put the bucket into the cache.""" - self.dump_bytecode(bucket) - - -class FileSystemBytecodeCache(BytecodeCache): - """A bytecode cache that stores bytecode on the filesystem. It accepts - two arguments: The directory where the cache items are stored and a - pattern string that is used to build the filename. - - If no directory is specified a default cache directory is selected. On - Windows the user's temp directory is used, on UNIX systems a directory - is created for the user in the system temp directory. - - The pattern can be used to have multiple separate caches operate on the - same directory. The default pattern is ``'__jinja2_%s.cache'``. ``%s`` - is replaced with the cache key. - - >>> bcc = FileSystemBytecodeCache('/tmp/jinja_cache', '%s.cache') - - This bytecode cache supports clearing of the cache using the clear method. - """ - - def __init__(self, directory=None, pattern="__jinja2_%s.cache"): - if directory is None: - directory = self._get_default_cache_dir() - self.directory = directory - self.pattern = pattern - - def _get_default_cache_dir(self): - def _unsafe_dir(): - raise RuntimeError( - "Cannot determine safe temp directory. You " - "need to explicitly provide one." - ) - - tmpdir = tempfile.gettempdir() - - # On windows the temporary directory is used specific unless - # explicitly forced otherwise. We can just use that. - if os.name == "nt": - return tmpdir - if not hasattr(os, "getuid"): - _unsafe_dir() - - dirname = f"_jinja2-cache-{os.getuid()}" - actual_dir = os.path.join(tmpdir, dirname) - - try: - os.mkdir(actual_dir, stat.S_IRWXU) - except OSError as e: - if e.errno != errno.EEXIST: - raise - try: - os.chmod(actual_dir, stat.S_IRWXU) - actual_dir_stat = os.lstat(actual_dir) - if ( - actual_dir_stat.st_uid != os.getuid() - or not stat.S_ISDIR(actual_dir_stat.st_mode) - or stat.S_IMODE(actual_dir_stat.st_mode) != stat.S_IRWXU - ): - _unsafe_dir() - except OSError as e: - if e.errno != errno.EEXIST: - raise - - actual_dir_stat = os.lstat(actual_dir) - if ( - actual_dir_stat.st_uid != os.getuid() - or not stat.S_ISDIR(actual_dir_stat.st_mode) - or stat.S_IMODE(actual_dir_stat.st_mode) != stat.S_IRWXU - ): - _unsafe_dir() - - return actual_dir - - def _get_cache_filename(self, bucket): - return os.path.join(self.directory, self.pattern % (bucket.key,)) - - def load_bytecode(self, bucket): - f = open_if_exists(self._get_cache_filename(bucket), "rb") - if f is not None: - try: - bucket.load_bytecode(f) - finally: - f.close() - - def dump_bytecode(self, bucket): - f = open(self._get_cache_filename(bucket), "wb") - try: - bucket.write_bytecode(f) - finally: - f.close() - - def clear(self): - # imported lazily here because google app-engine doesn't support - # write access on the file system and the function does not exist - # normally. - from os import remove - - files = fnmatch.filter(os.listdir(self.directory), self.pattern % ("*",)) - for filename in files: - try: - remove(os.path.join(self.directory, filename)) - except OSError: - pass - - -class MemcachedBytecodeCache(BytecodeCache): - """This class implements a bytecode cache that uses a memcache cache for - storing the information. It does not enforce a specific memcache library - (tummy's memcache or cmemcache) but will accept any class that provides - the minimal interface required. - - Libraries compatible with this class: - - - `cachelib `_ - - `python-memcached `_ - - (Unfortunately the django cache interface is not compatible because it - does not support storing binary data, only text. You can however pass - the underlying cache client to the bytecode cache which is available - as `django.core.cache.cache._client`.) - - The minimal interface for the client passed to the constructor is this: - - .. class:: MinimalClientInterface - - .. method:: set(key, value[, timeout]) - - Stores the bytecode in the cache. `value` is a string and - `timeout` the timeout of the key. If timeout is not provided - a default timeout or no timeout should be assumed, if it's - provided it's an integer with the number of seconds the cache - item should exist. - - .. method:: get(key) - - Returns the value for the cache key. If the item does not - exist in the cache the return value must be `None`. - - The other arguments to the constructor are the prefix for all keys that - is added before the actual cache key and the timeout for the bytecode in - the cache system. We recommend a high (or no) timeout. - - This bytecode cache does not support clearing of used items in the cache. - The clear method is a no-operation function. - - .. versionadded:: 2.7 - Added support for ignoring memcache errors through the - `ignore_memcache_errors` parameter. - """ - - def __init__( - self, - client, - prefix="jinja2/bytecode/", - timeout=None, - ignore_memcache_errors=True, - ): - self.client = client - self.prefix = prefix - self.timeout = timeout - self.ignore_memcache_errors = ignore_memcache_errors - - def load_bytecode(self, bucket): - try: - code = self.client.get(self.prefix + bucket.key) - except Exception: - if not self.ignore_memcache_errors: - raise - code = None - if code is not None: - bucket.bytecode_from_string(code) - - def dump_bytecode(self, bucket): - args = (self.prefix + bucket.key, bucket.bytecode_to_string()) - if self.timeout is not None: - args += (self.timeout,) - try: - self.client.set(*args) - except Exception: - if not self.ignore_memcache_errors: - raise diff --git a/src/jinja2/compiler.py b/src/jinja2/compiler.py deleted file mode 100644 index abdbe6da..00000000 --- a/src/jinja2/compiler.py +++ /dev/null @@ -1,1754 +0,0 @@ -"""Compiles nodes from the parser into Python code.""" -from collections import namedtuple -from functools import update_wrapper -from io import StringIO -from itertools import chain -from keyword import iskeyword as is_python_keyword - -from markupsafe import escape -from markupsafe import Markup - -from . import nodes -from .exceptions import TemplateAssertionError -from .idtracking import Symbols -from .idtracking import VAR_LOAD_ALIAS -from .idtracking import VAR_LOAD_PARAMETER -from .idtracking import VAR_LOAD_RESOLVE -from .idtracking import VAR_LOAD_UNDEFINED -from .nodes import EvalContext -from .optimizer import Optimizer -from .utils import concat -from .visitor import NodeVisitor - -operators = { - "eq": "==", - "ne": "!=", - "gt": ">", - "gteq": ">=", - "lt": "<", - "lteq": "<=", - "in": "in", - "notin": "not in", -} - - -def optimizeconst(f): - def new_func(self, node, frame, **kwargs): - # Only optimize if the frame is not volatile - if self.optimized and not frame.eval_ctx.volatile: - new_node = self.optimizer.visit(node, frame.eval_ctx) - if new_node != node: - return self.visit(new_node, frame) - return f(self, node, frame, **kwargs) - - return update_wrapper(new_func, f) - - -def generate( - node, environment, name, filename, stream=None, defer_init=False, optimized=True -): - """Generate the python source for a node tree.""" - if not isinstance(node, nodes.Template): - raise TypeError("Can't compile non template nodes") - generator = environment.code_generator_class( - environment, name, filename, stream, defer_init, optimized - ) - generator.visit(node) - if stream is None: - return generator.stream.getvalue() - - -def has_safe_repr(value): - """Does the node have a safe representation?""" - if value is None or value is NotImplemented or value is Ellipsis: - return True - - if type(value) in {bool, int, float, complex, range, str, Markup}: - return True - - if type(value) in {tuple, list, set, frozenset}: - return all(has_safe_repr(v) for v in value) - - if type(value) is dict: - return all(has_safe_repr(k) and has_safe_repr(v) for k, v in value.items()) - - return False - - -def find_undeclared(nodes, names): - """Check if the names passed are accessed undeclared. The return value - is a set of all the undeclared names from the sequence of names found. - """ - visitor = UndeclaredNameVisitor(names) - try: - for node in nodes: - visitor.visit(node) - except VisitorExit: - pass - return visitor.undeclared - - -class MacroRef: - def __init__(self, node): - self.node = node - self.accesses_caller = False - self.accesses_kwargs = False - self.accesses_varargs = False - - -class Frame: - """Holds compile time information for us.""" - - def __init__(self, eval_ctx, parent=None, level=None): - self.eval_ctx = eval_ctx - self.symbols = Symbols(parent.symbols if parent else None, level=level) - - # a toplevel frame is the root + soft frames such as if conditions. - self.toplevel = False - - # the root frame is basically just the outermost frame, so no if - # conditions. This information is used to optimize inheritance - # situations. - self.rootlevel = False - - # in some dynamic inheritance situations the compiler needs to add - # write tests around output statements. - self.require_output_check = parent and parent.require_output_check - - # inside some tags we are using a buffer rather than yield statements. - # this for example affects {% filter %} or {% macro %}. If a frame - # is buffered this variable points to the name of the list used as - # buffer. - self.buffer = None - - # the name of the block we're in, otherwise None. - self.block = parent.block if parent else None - - # the parent of this frame - self.parent = parent - - if parent is not None: - self.buffer = parent.buffer - - def copy(self): - """Create a copy of the current one.""" - rv = object.__new__(self.__class__) - rv.__dict__.update(self.__dict__) - rv.symbols = self.symbols.copy() - return rv - - def inner(self, isolated=False): - """Return an inner frame.""" - if isolated: - return Frame(self.eval_ctx, level=self.symbols.level + 1) - return Frame(self.eval_ctx, self) - - def soft(self): - """Return a soft frame. A soft frame may not be modified as - standalone thing as it shares the resources with the frame it - was created of, but it's not a rootlevel frame any longer. - - This is only used to implement if-statements. - """ - rv = self.copy() - rv.rootlevel = False - return rv - - __copy__ = copy - - -class VisitorExit(RuntimeError): - """Exception used by the `UndeclaredNameVisitor` to signal a stop.""" - - -class DependencyFinderVisitor(NodeVisitor): - """A visitor that collects filter and test calls.""" - - def __init__(self): - self.filters = set() - self.tests = set() - - def visit_Filter(self, node): - self.generic_visit(node) - self.filters.add(node.name) - - def visit_Test(self, node): - self.generic_visit(node) - self.tests.add(node.name) - - def visit_Block(self, node): - """Stop visiting at blocks.""" - - -class UndeclaredNameVisitor(NodeVisitor): - """A visitor that checks if a name is accessed without being - declared. This is different from the frame visitor as it will - not stop at closure frames. - """ - - def __init__(self, names): - self.names = set(names) - self.undeclared = set() - - def visit_Name(self, node): - if node.ctx == "load" and node.name in self.names: - self.undeclared.add(node.name) - if self.undeclared == self.names: - raise VisitorExit() - else: - self.names.discard(node.name) - - def visit_Block(self, node): - """Stop visiting a blocks.""" - - -class CompilerExit(Exception): - """Raised if the compiler encountered a situation where it just - doesn't make sense to further process the code. Any block that - raises such an exception is not further processed. - """ - - -class CodeGenerator(NodeVisitor): - def __init__( - self, environment, name, filename, stream=None, defer_init=False, optimized=True - ): - if stream is None: - stream = StringIO() - self.environment = environment - self.name = name - self.filename = filename - self.stream = stream - self.created_block_context = False - self.defer_init = defer_init - self.optimized = optimized - if optimized: - self.optimizer = Optimizer(environment) - - # aliases for imports - self.import_aliases = {} - - # a registry for all blocks. Because blocks are moved out - # into the global python scope they are registered here - self.blocks = {} - - # the number of extends statements so far - self.extends_so_far = 0 - - # some templates have a rootlevel extends. In this case we - # can safely assume that we're a child template and do some - # more optimizations. - self.has_known_extends = False - - # the current line number - self.code_lineno = 1 - - # registry of all filters and tests (global, not block local) - self.tests = {} - self.filters = {} - - # the debug information - self.debug_info = [] - self._write_debug_info = None - - # the number of new lines before the next write() - self._new_lines = 0 - - # the line number of the last written statement - self._last_line = 0 - - # true if nothing was written so far. - self._first_write = True - - # used by the `temporary_identifier` method to get new - # unique, temporary identifier - self._last_identifier = 0 - - # the current indentation - self._indentation = 0 - - # Tracks toplevel assignments - self._assign_stack = [] - - # Tracks parameter definition blocks - self._param_def_block = [] - - # Tracks the current context. - self._context_reference_stack = ["context"] - - # -- Various compilation helpers - - def fail(self, msg, lineno): - """Fail with a :exc:`TemplateAssertionError`.""" - raise TemplateAssertionError(msg, lineno, self.name, self.filename) - - def temporary_identifier(self): - """Get a new unique identifier.""" - self._last_identifier += 1 - return f"t_{self._last_identifier}" - - def buffer(self, frame): - """Enable buffering for the frame from that point onwards.""" - frame.buffer = self.temporary_identifier() - self.writeline(f"{frame.buffer} = []") - - def return_buffer_contents(self, frame, force_unescaped=False): - """Return the buffer contents of the frame.""" - if not force_unescaped: - if frame.eval_ctx.volatile: - self.writeline("if context.eval_ctx.autoescape:") - self.indent() - self.writeline(f"return Markup(concat({frame.buffer}))") - self.outdent() - self.writeline("else:") - self.indent() - self.writeline(f"return concat({frame.buffer})") - self.outdent() - return - elif frame.eval_ctx.autoescape: - self.writeline(f"return Markup(concat({frame.buffer}))") - return - self.writeline(f"return concat({frame.buffer})") - - def indent(self): - """Indent by one.""" - self._indentation += 1 - - def outdent(self, step=1): - """Outdent by step.""" - self._indentation -= step - - def start_write(self, frame, node=None): - """Yield or write into the frame buffer.""" - if frame.buffer is None: - self.writeline("yield ", node) - else: - self.writeline(f"{frame.buffer}.append(", node) - - def end_write(self, frame): - """End the writing process started by `start_write`.""" - if frame.buffer is not None: - self.write(")") - - def simple_write(self, s, frame, node=None): - """Simple shortcut for start_write + write + end_write.""" - self.start_write(frame, node) - self.write(s) - self.end_write(frame) - - def blockvisit(self, nodes, frame): - """Visit a list of nodes as block in a frame. If the current frame - is no buffer a dummy ``if 0: yield None`` is written automatically. - """ - try: - self.writeline("pass") - for node in nodes: - self.visit(node, frame) - except CompilerExit: - pass - - def write(self, x): - """Write a string into the output stream.""" - if self._new_lines: - if not self._first_write: - self.stream.write("\n" * self._new_lines) - self.code_lineno += self._new_lines - if self._write_debug_info is not None: - self.debug_info.append((self._write_debug_info, self.code_lineno)) - self._write_debug_info = None - self._first_write = False - self.stream.write(" " * self._indentation) - self._new_lines = 0 - self.stream.write(x) - - def writeline(self, x, node=None, extra=0): - """Combination of newline and write.""" - self.newline(node, extra) - self.write(x) - - def newline(self, node=None, extra=0): - """Add one or more newlines before the next write.""" - self._new_lines = max(self._new_lines, 1 + extra) - if node is not None and node.lineno != self._last_line: - self._write_debug_info = node.lineno - self._last_line = node.lineno - - def signature(self, node, frame, extra_kwargs=None): - """Writes a function call to the stream for the current node. - A leading comma is added automatically. The extra keyword - arguments may not include python keywords otherwise a syntax - error could occur. The extra keyword arguments should be given - as python dict. - """ - # if any of the given keyword arguments is a python keyword - # we have to make sure that no invalid call is created. - kwarg_workaround = False - for kwarg in chain((x.key for x in node.kwargs), extra_kwargs or ()): - if is_python_keyword(kwarg): - kwarg_workaround = True - break - - for arg in node.args: - self.write(", ") - self.visit(arg, frame) - - if not kwarg_workaround: - for kwarg in node.kwargs: - self.write(", ") - self.visit(kwarg, frame) - if extra_kwargs is not None: - for key, value in extra_kwargs.items(): - self.write(f", {key}={value}") - if node.dyn_args: - self.write(", *") - self.visit(node.dyn_args, frame) - - if kwarg_workaround: - if node.dyn_kwargs is not None: - self.write(", **dict({") - else: - self.write(", **{") - for kwarg in node.kwargs: - self.write(f"{kwarg.key!r}: ") - self.visit(kwarg.value, frame) - self.write(", ") - if extra_kwargs is not None: - for key, value in extra_kwargs.items(): - self.write(f"{key!r}: {value}, ") - if node.dyn_kwargs is not None: - self.write("}, **") - self.visit(node.dyn_kwargs, frame) - self.write(")") - else: - self.write("}") - - elif node.dyn_kwargs is not None: - self.write(", **") - self.visit(node.dyn_kwargs, frame) - - def pull_dependencies(self, nodes): - """Pull all the dependencies.""" - visitor = DependencyFinderVisitor() - for node in nodes: - visitor.visit(node) - for dependency in "filters", "tests": - mapping = getattr(self, dependency) - for name in getattr(visitor, dependency): - if name not in mapping: - mapping[name] = self.temporary_identifier() - self.writeline(f"{mapping[name]} = environment.{dependency}[{name!r}]") - - def enter_frame(self, frame): - undefs = [] - for target, (action, param) in frame.symbols.loads.items(): - if action == VAR_LOAD_PARAMETER: - pass - elif action == VAR_LOAD_RESOLVE: - self.writeline(f"{target} = {self.get_resolve_func()}({param!r})") - elif action == VAR_LOAD_ALIAS: - self.writeline(f"{target} = {param}") - elif action == VAR_LOAD_UNDEFINED: - undefs.append(target) - else: - raise NotImplementedError("unknown load instruction") - if undefs: - self.writeline(f"{' = '.join(undefs)} = missing") - - def leave_frame(self, frame, with_python_scope=False): - if not with_python_scope: - undefs = [] - for target in frame.symbols.loads: - undefs.append(target) - if undefs: - self.writeline(f"{' = '.join(undefs)} = missing") - - def func(self, name): - if self.environment.is_async: - return f"async def {name}" - return f"def {name}" - - def macro_body(self, node, frame): - """Dump the function def of a macro or call block.""" - frame = frame.inner() - frame.symbols.analyze_node(node) - macro_ref = MacroRef(node) - - explicit_caller = None - skip_special_params = set() - args = [] - for idx, arg in enumerate(node.args): - if arg.name == "caller": - explicit_caller = idx - if arg.name in ("kwargs", "varargs"): - skip_special_params.add(arg.name) - args.append(frame.symbols.ref(arg.name)) - - undeclared = find_undeclared(node.body, ("caller", "kwargs", "varargs")) - - if "caller" in undeclared: - # In older Jinja versions there was a bug that allowed caller - # to retain the special behavior even if it was mentioned in - # the argument list. However thankfully this was only really - # working if it was the last argument. So we are explicitly - # checking this now and error out if it is anywhere else in - # the argument list. - if explicit_caller is not None: - try: - node.defaults[explicit_caller - len(node.args)] - except IndexError: - self.fail( - "When defining macros or call blocks the " - 'special "caller" argument must be omitted ' - "or be given a default.", - node.lineno, - ) - else: - args.append(frame.symbols.declare_parameter("caller")) - macro_ref.accesses_caller = True - if "kwargs" in undeclared and "kwargs" not in skip_special_params: - args.append(frame.symbols.declare_parameter("kwargs")) - macro_ref.accesses_kwargs = True - if "varargs" in undeclared and "varargs" not in skip_special_params: - args.append(frame.symbols.declare_parameter("varargs")) - macro_ref.accesses_varargs = True - - # macros are delayed, they never require output checks - frame.require_output_check = False - frame.symbols.analyze_node(node) - self.writeline(f"{self.func('macro')}({', '.join(args)}):", node) - self.indent() - - self.buffer(frame) - self.enter_frame(frame) - - self.push_parameter_definitions(frame) - for idx, arg in enumerate(node.args): - ref = frame.symbols.ref(arg.name) - self.writeline(f"if {ref} is missing:") - self.indent() - try: - default = node.defaults[idx - len(node.args)] - except IndexError: - self.writeline( - f'{ref} = undefined("parameter {arg.name!r} was not provided",' - f" name={arg.name!r})" - ) - else: - self.writeline(f"{ref} = ") - self.visit(default, frame) - self.mark_parameter_stored(ref) - self.outdent() - self.pop_parameter_definitions() - - self.blockvisit(node.body, frame) - self.return_buffer_contents(frame, force_unescaped=True) - self.leave_frame(frame, with_python_scope=True) - self.outdent() - - return frame, macro_ref - - def macro_def(self, macro_ref, frame): - """Dump the macro definition for the def created by macro_body.""" - arg_tuple = ", ".join(repr(x.name) for x in macro_ref.node.args) - name = getattr(macro_ref.node, "name", None) - if len(macro_ref.node.args) == 1: - arg_tuple += "," - self.write( - f"Macro(environment, macro, {name!r}, ({arg_tuple})," - f" {macro_ref.accesses_kwargs!r}, {macro_ref.accesses_varargs!r}," - f" {macro_ref.accesses_caller!r}, context.eval_ctx.autoescape)" - ) - - def position(self, node): - """Return a human readable position for the node.""" - rv = f"line {node.lineno}" - if self.name is not None: - rv = f"{rv} in {self.name!r}" - return rv - - def dump_local_context(self, frame): - items_kv = ", ".join( - f"{name!r}: {target}" - for name, target in frame.symbols.dump_stores().items() - ) - return f"{{{items_kv}}}" - - def write_commons(self): - """Writes a common preamble that is used by root and block functions. - Primarily this sets up common local helpers and enforces a generator - through a dead branch. - """ - self.writeline("resolve = context.resolve_or_missing") - self.writeline("undefined = environment.undefined") - # always use the standard Undefined class for the implicit else of - # conditional expressions - self.writeline("cond_expr_undefined = Undefined") - self.writeline("if 0: yield None") - - def push_parameter_definitions(self, frame): - """Pushes all parameter targets from the given frame into a local - stack that permits tracking of yet to be assigned parameters. In - particular this enables the optimization from `visit_Name` to skip - undefined expressions for parameters in macros as macros can reference - otherwise unbound parameters. - """ - self._param_def_block.append(frame.symbols.dump_param_targets()) - - def pop_parameter_definitions(self): - """Pops the current parameter definitions set.""" - self._param_def_block.pop() - - def mark_parameter_stored(self, target): - """Marks a parameter in the current parameter definitions as stored. - This will skip the enforced undefined checks. - """ - if self._param_def_block: - self._param_def_block[-1].discard(target) - - def push_context_reference(self, target): - self._context_reference_stack.append(target) - - def pop_context_reference(self): - self._context_reference_stack.pop() - - def get_context_ref(self): - return self._context_reference_stack[-1] - - def get_resolve_func(self): - target = self._context_reference_stack[-1] - if target == "context": - return "resolve" - return f"{target}.resolve" - - def derive_context(self, frame): - return f"{self.get_context_ref()}.derived({self.dump_local_context(frame)})" - - def parameter_is_undeclared(self, target): - """Checks if a given target is an undeclared parameter.""" - if not self._param_def_block: - return False - return target in self._param_def_block[-1] - - def push_assign_tracking(self): - """Pushes a new layer for assignment tracking.""" - self._assign_stack.append(set()) - - def pop_assign_tracking(self, frame): - """Pops the topmost level for assignment tracking and updates the - context variables if necessary. - """ - vars = self._assign_stack.pop() - if not frame.toplevel or not vars: - return - public_names = [x for x in vars if x[:1] != "_"] - if len(vars) == 1: - name = next(iter(vars)) - ref = frame.symbols.ref(name) - self.writeline(f"context.vars[{name!r}] = {ref}") - else: - self.writeline("context.vars.update({") - for idx, name in enumerate(vars): - if idx: - self.write(", ") - ref = frame.symbols.ref(name) - self.write(f"{name!r}: {ref}") - self.write("})") - if public_names: - if len(public_names) == 1: - self.writeline(f"context.exported_vars.add({public_names[0]!r})") - else: - names_str = ", ".join(map(repr, public_names)) - self.writeline(f"context.exported_vars.update(({names_str}))") - - # -- Statement Visitors - - def visit_Template(self, node, frame=None): - assert frame is None, "no root frame allowed" - eval_ctx = EvalContext(self.environment, self.name) - - from .runtime import exported - - self.writeline("from __future__ import generator_stop") # Python < 3.7 - self.writeline("from jinja2.runtime import " + ", ".join(exported)) - - if self.environment.is_async: - self.writeline( - "from jinja2.asyncsupport import auto_await, " - "auto_aiter, AsyncLoopContext" - ) - - # if we want a deferred initialization we cannot move the - # environment into a local name - envenv = "" if self.defer_init else ", environment=environment" - - # do we have an extends tag at all? If not, we can save some - # overhead by just not processing any inheritance code. - have_extends = node.find(nodes.Extends) is not None - - # find all blocks - for block in node.find_all(nodes.Block): - if block.name in self.blocks: - self.fail(f"block {block.name!r} defined twice", block.lineno) - self.blocks[block.name] = block - - # find all imports and import them - for import_ in node.find_all(nodes.ImportedName): - if import_.importname not in self.import_aliases: - imp = import_.importname - self.import_aliases[imp] = alias = self.temporary_identifier() - if "." in imp: - module, obj = imp.rsplit(".", 1) - self.writeline(f"from {module} import {obj} as {alias}") - else: - self.writeline(f"import {imp} as {alias}") - - # add the load name - self.writeline(f"name = {self.name!r}") - - # generate the root render function. - self.writeline( - f"{self.func('root')}(context, missing=missing{envenv}):", extra=1 - ) - self.indent() - self.write_commons() - - # process the root - frame = Frame(eval_ctx) - if "self" in find_undeclared(node.body, ("self",)): - ref = frame.symbols.declare_parameter("self") - self.writeline(f"{ref} = TemplateReference(context)") - frame.symbols.analyze_node(node) - frame.toplevel = frame.rootlevel = True - frame.require_output_check = have_extends and not self.has_known_extends - if have_extends: - self.writeline("parent_template = None") - self.enter_frame(frame) - self.pull_dependencies(node.body) - self.blockvisit(node.body, frame) - self.leave_frame(frame, with_python_scope=True) - self.outdent() - - # make sure that the parent root is called. - if have_extends: - if not self.has_known_extends: - self.indent() - self.writeline("if parent_template is not None:") - self.indent() - if not self.environment.is_async: - self.writeline("yield from parent_template.root_render_func(context)") - else: - loop = "async for" if self.environment.is_async else "for" - self.writeline( - f"{loop} event in parent_template.root_render_func(context):" - ) - self.indent() - self.writeline("yield event") - self.outdent() - self.outdent(1 + (not self.has_known_extends)) - - # at this point we now have the blocks collected and can visit them too. - for name, block in self.blocks.items(): - self.writeline( - f"{self.func('block_' + name)}(context, missing=missing{envenv}):", - block, - 1, - ) - self.indent() - self.write_commons() - # It's important that we do not make this frame a child of the - # toplevel template. This would cause a variety of - # interesting issues with identifier tracking. - block_frame = Frame(eval_ctx) - undeclared = find_undeclared(block.body, ("self", "super")) - if "self" in undeclared: - ref = block_frame.symbols.declare_parameter("self") - self.writeline(f"{ref} = TemplateReference(context)") - if "super" in undeclared: - ref = block_frame.symbols.declare_parameter("super") - self.writeline(f"{ref} = context.super({name!r}, block_{name})") - block_frame.symbols.analyze_node(block) - block_frame.block = name - self.enter_frame(block_frame) - self.pull_dependencies(block.body) - self.blockvisit(block.body, block_frame) - self.leave_frame(block_frame, with_python_scope=True) - self.outdent() - - blocks_kv_str = ", ".join(f"{x!r}: block_{x}" for x in self.blocks) - self.writeline(f"blocks = {{{blocks_kv_str}}}", extra=1) - debug_kv_str = "&".join(f"{k}={v}" for k, v in self.debug_info) - self.writeline(f"debug_info = {debug_kv_str!r}") - - def visit_Block(self, node, frame): - """Call a block and register it for the template.""" - level = 0 - if frame.toplevel: - # if we know that we are a child template, there is no need to - # check if we are one - if self.has_known_extends: - return - if self.extends_so_far > 0: - self.writeline("if parent_template is None:") - self.indent() - level += 1 - - if node.scoped: - context = self.derive_context(frame) - else: - context = self.get_context_ref() - - if not self.environment.is_async and frame.buffer is None: - self.writeline( - f"yield from context.blocks[{node.name!r}][0]({context})", node - ) - else: - loop = "async for" if self.environment.is_async else "for" - self.writeline( - f"{loop} event in context.blocks[{node.name!r}][0]({context}):", node - ) - self.indent() - self.simple_write("event", frame) - self.outdent() - - self.outdent(level) - - def visit_Extends(self, node, frame): - """Calls the extender.""" - if not frame.toplevel: - self.fail("cannot use extend from a non top-level scope", node.lineno) - - # if the number of extends statements in general is zero so - # far, we don't have to add a check if something extended - # the template before this one. - if self.extends_so_far > 0: - - # if we have a known extends we just add a template runtime - # error into the generated code. We could catch that at compile - # time too, but i welcome it not to confuse users by throwing the - # same error at different times just "because we can". - if not self.has_known_extends: - self.writeline("if parent_template is not None:") - self.indent() - self.writeline('raise TemplateRuntimeError("extended multiple times")') - - # if we have a known extends already we don't need that code here - # as we know that the template execution will end here. - if self.has_known_extends: - raise CompilerExit() - else: - self.outdent() - - self.writeline("parent_template = environment.get_template(", node) - self.visit(node.template, frame) - self.write(f", {self.name!r})") - self.writeline("for name, parent_block in parent_template.blocks.items():") - self.indent() - self.writeline("context.blocks.setdefault(name, []).append(parent_block)") - self.outdent() - - # if this extends statement was in the root level we can take - # advantage of that information and simplify the generated code - # in the top level from this point onwards - if frame.rootlevel: - self.has_known_extends = True - - # and now we have one more - self.extends_so_far += 1 - - def visit_Include(self, node, frame): - """Handles includes.""" - if node.ignore_missing: - self.writeline("try:") - self.indent() - - func_name = "get_or_select_template" - if isinstance(node.template, nodes.Const): - if isinstance(node.template.value, str): - func_name = "get_template" - elif isinstance(node.template.value, (tuple, list)): - func_name = "select_template" - elif isinstance(node.template, (nodes.Tuple, nodes.List)): - func_name = "select_template" - - self.writeline(f"template = environment.{func_name}(", node) - self.visit(node.template, frame) - self.write(f", {self.name!r})") - if node.ignore_missing: - self.outdent() - self.writeline("except TemplateNotFound:") - self.indent() - self.writeline("pass") - self.outdent() - self.writeline("else:") - self.indent() - - skip_event_yield = False - if node.with_context: - loop = "async for" if self.environment.is_async else "for" - self.writeline( - f"{loop} event in template.root_render_func(" - "template.new_context(context.get_all(), True," - f" {self.dump_local_context(frame)})):" - ) - elif self.environment.is_async: - self.writeline( - "for event in (await template._get_default_module_async())" - "._body_stream:" - ) - else: - self.writeline("yield from template._get_default_module()._body_stream") - skip_event_yield = True - - if not skip_event_yield: - self.indent() - self.simple_write("event", frame) - self.outdent() - - if node.ignore_missing: - self.outdent() - - def visit_Import(self, node, frame): - """Visit regular imports.""" - self.writeline(f"{frame.symbols.ref(node.target)} = ", node) - if frame.toplevel: - self.write(f"context.vars[{node.target!r}] = ") - if self.environment.is_async: - self.write("await ") - self.write("environment.get_template(") - self.visit(node.template, frame) - self.write(f", {self.name!r}).") - if node.with_context: - func = "make_module" + ("_async" if self.environment.is_async else "") - self.write( - f"{func}(context.get_all(), True, {self.dump_local_context(frame)})" - ) - elif self.environment.is_async: - self.write("_get_default_module_async()") - else: - self.write("_get_default_module(context)") - if frame.toplevel and not node.target.startswith("_"): - self.writeline(f"context.exported_vars.discard({node.target!r})") - - def visit_FromImport(self, node, frame): - """Visit named imports.""" - self.newline(node) - prefix = "await " if self.environment.is_async else "" - self.write(f"included_template = {prefix}environment.get_template(") - self.visit(node.template, frame) - self.write(f", {self.name!r}).") - if node.with_context: - func = "make_module" + ("_async" if self.environment.is_async else "") - self.write( - f"{func}(context.get_all(), True, {self.dump_local_context(frame)})" - ) - elif self.environment.is_async: - self.write("_get_default_module_async()") - else: - self.write("_get_default_module(context)") - - var_names = [] - discarded_names = [] - for name in node.names: - if isinstance(name, tuple): - name, alias = name - else: - alias = name - self.writeline( - f"{frame.symbols.ref(alias)} =" - f" getattr(included_template, {name!r}, missing)" - ) - self.writeline(f"if {frame.symbols.ref(alias)} is missing:") - self.indent() - message = ( - "the template {included_template.__name__!r}" - f" (imported on {self.position(node)})" - f" does not export the requested name {name!r}" - ) - self.writeline( - f"{frame.symbols.ref(alias)} = undefined(f{message!r}, name={name!r})" - ) - self.outdent() - if frame.toplevel: - var_names.append(alias) - if not alias.startswith("_"): - discarded_names.append(alias) - - if var_names: - if len(var_names) == 1: - name = var_names[0] - self.writeline(f"context.vars[{name!r}] = {frame.symbols.ref(name)}") - else: - names_kv = ", ".join( - f"{name!r}: {frame.symbols.ref(name)}" for name in var_names - ) - self.writeline(f"context.vars.update({{{names_kv}}})") - if discarded_names: - if len(discarded_names) == 1: - self.writeline(f"context.exported_vars.discard({discarded_names[0]!r})") - else: - names_str = ", ".join(map(repr, discarded_names)) - self.writeline( - f"context.exported_vars.difference_update(({names_str}))" - ) - - def visit_For(self, node, frame): - loop_frame = frame.inner() - test_frame = frame.inner() - else_frame = frame.inner() - - # try to figure out if we have an extended loop. An extended loop - # is necessary if the loop is in recursive mode if the special loop - # variable is accessed in the body. - extended_loop = node.recursive or "loop" in find_undeclared( - node.iter_child_nodes(only=("body",)), ("loop",) - ) - - loop_ref = None - if extended_loop: - loop_ref = loop_frame.symbols.declare_parameter("loop") - - loop_frame.symbols.analyze_node(node, for_branch="body") - if node.else_: - else_frame.symbols.analyze_node(node, for_branch="else") - - if node.test: - loop_filter_func = self.temporary_identifier() - test_frame.symbols.analyze_node(node, for_branch="test") - self.writeline(f"{self.func(loop_filter_func)}(fiter):", node.test) - self.indent() - self.enter_frame(test_frame) - self.writeline("async for " if self.environment.is_async else "for ") - self.visit(node.target, loop_frame) - self.write(" in ") - self.write("auto_aiter(fiter)" if self.environment.is_async else "fiter") - self.write(":") - self.indent() - self.writeline("if ", node.test) - self.visit(node.test, test_frame) - self.write(":") - self.indent() - self.writeline("yield ") - self.visit(node.target, loop_frame) - self.outdent(3) - self.leave_frame(test_frame, with_python_scope=True) - - # if we don't have an recursive loop we have to find the shadowed - # variables at that point. Because loops can be nested but the loop - # variable is a special one we have to enforce aliasing for it. - if node.recursive: - self.writeline( - f"{self.func('loop')}(reciter, loop_render_func, depth=0):", node - ) - self.indent() - self.buffer(loop_frame) - - # Use the same buffer for the else frame - else_frame.buffer = loop_frame.buffer - - # make sure the loop variable is a special one and raise a template - # assertion error if a loop tries to write to loop - if extended_loop: - self.writeline(f"{loop_ref} = missing") - - for name in node.find_all(nodes.Name): - if name.ctx == "store" and name.name == "loop": - self.fail( - "Can't assign to special loop variable in for-loop target", - name.lineno, - ) - - if node.else_: - iteration_indicator = self.temporary_identifier() - self.writeline(f"{iteration_indicator} = 1") - - self.writeline("async for " if self.environment.is_async else "for ", node) - self.visit(node.target, loop_frame) - if extended_loop: - prefix = "Async" if self.environment.is_async else "" - self.write(f", {loop_ref} in {prefix}LoopContext(") - else: - self.write(" in ") - - if node.test: - self.write(f"{loop_filter_func}(") - if node.recursive: - self.write("reciter") - else: - if self.environment.is_async and not extended_loop: - self.write("auto_aiter(") - self.visit(node.iter, frame) - if self.environment.is_async and not extended_loop: - self.write(")") - if node.test: - self.write(")") - - if node.recursive: - self.write(", undefined, loop_render_func, depth):") - else: - self.write(", undefined):" if extended_loop else ":") - - self.indent() - self.enter_frame(loop_frame) - - self.blockvisit(node.body, loop_frame) - if node.else_: - self.writeline(f"{iteration_indicator} = 0") - self.outdent() - self.leave_frame( - loop_frame, with_python_scope=node.recursive and not node.else_ - ) - - if node.else_: - self.writeline(f"if {iteration_indicator}:") - self.indent() - self.enter_frame(else_frame) - self.blockvisit(node.else_, else_frame) - self.leave_frame(else_frame) - self.outdent() - - # if the node was recursive we have to return the buffer contents - # and start the iteration code - if node.recursive: - self.return_buffer_contents(loop_frame) - self.outdent() - self.start_write(frame, node) - if self.environment.is_async: - self.write("await ") - self.write("loop(") - if self.environment.is_async: - self.write("auto_aiter(") - self.visit(node.iter, frame) - if self.environment.is_async: - self.write(")") - self.write(", loop)") - self.end_write(frame) - - def visit_If(self, node, frame): - if_frame = frame.soft() - self.writeline("if ", node) - self.visit(node.test, if_frame) - self.write(":") - self.indent() - self.blockvisit(node.body, if_frame) - self.outdent() - for elif_ in node.elif_: - self.writeline("elif ", elif_) - self.visit(elif_.test, if_frame) - self.write(":") - self.indent() - self.blockvisit(elif_.body, if_frame) - self.outdent() - if node.else_: - self.writeline("else:") - self.indent() - self.blockvisit(node.else_, if_frame) - self.outdent() - - def visit_Macro(self, node, frame): - macro_frame, macro_ref = self.macro_body(node, frame) - self.newline() - if frame.toplevel: - if not node.name.startswith("_"): - self.write(f"context.exported_vars.add({node.name!r})") - self.writeline(f"context.vars[{node.name!r}] = ") - self.write(f"{frame.symbols.ref(node.name)} = ") - self.macro_def(macro_ref, macro_frame) - - def visit_CallBlock(self, node, frame): - call_frame, macro_ref = self.macro_body(node, frame) - self.writeline("caller = ") - self.macro_def(macro_ref, call_frame) - self.start_write(frame, node) - self.visit_Call(node.call, frame, forward_caller=True) - self.end_write(frame) - - def visit_FilterBlock(self, node, frame): - filter_frame = frame.inner() - filter_frame.symbols.analyze_node(node) - self.enter_frame(filter_frame) - self.buffer(filter_frame) - self.blockvisit(node.body, filter_frame) - self.start_write(frame, node) - self.visit_Filter(node.filter, filter_frame) - self.end_write(frame) - self.leave_frame(filter_frame) - - def visit_With(self, node, frame): - with_frame = frame.inner() - with_frame.symbols.analyze_node(node) - self.enter_frame(with_frame) - for target, expr in zip(node.targets, node.values): - self.newline() - self.visit(target, with_frame) - self.write(" = ") - self.visit(expr, frame) - self.blockvisit(node.body, with_frame) - self.leave_frame(with_frame) - - def visit_ExprStmt(self, node, frame): - self.newline(node) - self.visit(node.node, frame) - - _FinalizeInfo = namedtuple("_FinalizeInfo", ("const", "src")) - #: The default finalize function if the environment isn't configured - #: with one. Or if the environment has one, this is called on that - #: function's output for constants. - _default_finalize = str - _finalize = None - - def _make_finalize(self): - """Build the finalize function to be used on constants and at - runtime. Cached so it's only created once for all output nodes. - - Returns a ``namedtuple`` with the following attributes: - - ``const`` - A function to finalize constant data at compile time. - - ``src`` - Source code to output around nodes to be evaluated at - runtime. - """ - if self._finalize is not None: - return self._finalize - - finalize = default = self._default_finalize - src = None - - if self.environment.finalize: - src = "environment.finalize(" - env_finalize = self.environment.finalize - - def finalize(value): - return default(env_finalize(value)) - - if getattr(env_finalize, "contextfunction", False) is True: - src += "context, " - finalize = None # noqa: F811 - elif getattr(env_finalize, "evalcontextfunction", False) is True: - src += "context.eval_ctx, " - finalize = None - elif getattr(env_finalize, "environmentfunction", False) is True: - src += "environment, " - - def finalize(value): - return default(env_finalize(self.environment, value)) - - self._finalize = self._FinalizeInfo(finalize, src) - return self._finalize - - def _output_const_repr(self, group): - """Given a group of constant values converted from ``Output`` - child nodes, produce a string to write to the template module - source. - """ - return repr(concat(group)) - - def _output_child_to_const(self, node, frame, finalize): - """Try to optimize a child of an ``Output`` node by trying to - convert it to constant, finalized data at compile time. - - If :exc:`Impossible` is raised, the node is not constant and - will be evaluated at runtime. Any other exception will also be - evaluated at runtime for easier debugging. - """ - const = node.as_const(frame.eval_ctx) - - if frame.eval_ctx.autoescape: - const = escape(const) - - # Template data doesn't go through finalize. - if isinstance(node, nodes.TemplateData): - return str(const) - - return finalize.const(const) - - def _output_child_pre(self, node, frame, finalize): - """Output extra source code before visiting a child of an - ``Output`` node. - """ - if frame.eval_ctx.volatile: - self.write("(escape if context.eval_ctx.autoescape else str)(") - elif frame.eval_ctx.autoescape: - self.write("escape(") - else: - self.write("str(") - - if finalize.src is not None: - self.write(finalize.src) - - def _output_child_post(self, node, frame, finalize): - """Output extra source code after visiting a child of an - ``Output`` node. - """ - self.write(")") - - if finalize.src is not None: - self.write(")") - - def visit_Output(self, node, frame): - # If an extends is active, don't render outside a block. - if frame.require_output_check: - # A top-level extends is known to exist at compile time. - if self.has_known_extends: - return - - self.writeline("if parent_template is None:") - self.indent() - - finalize = self._make_finalize() - body = [] - - # Evaluate constants at compile time if possible. Each item in - # body will be either a list of static data or a node to be - # evaluated at runtime. - for child in node.nodes: - try: - if not ( - # If the finalize function requires runtime context, - # constants can't be evaluated at compile time. - finalize.const - # Unless it's basic template data that won't be - # finalized anyway. - or isinstance(child, nodes.TemplateData) - ): - raise nodes.Impossible() - - const = self._output_child_to_const(child, frame, finalize) - except (nodes.Impossible, Exception): - # The node was not constant and needs to be evaluated at - # runtime. Or another error was raised, which is easier - # to debug at runtime. - body.append(child) - continue - - if body and isinstance(body[-1], list): - body[-1].append(const) - else: - body.append([const]) - - if frame.buffer is not None: - if len(body) == 1: - self.writeline(f"{frame.buffer}.append(") - else: - self.writeline(f"{frame.buffer}.extend((") - - self.indent() - - for item in body: - if isinstance(item, list): - # A group of constant data to join and output. - val = self._output_const_repr(item) - - if frame.buffer is None: - self.writeline("yield " + val) - else: - self.writeline(val + ",") - else: - if frame.buffer is None: - self.writeline("yield ", item) - else: - self.newline(item) - - # A node to be evaluated at runtime. - self._output_child_pre(item, frame, finalize) - self.visit(item, frame) - self._output_child_post(item, frame, finalize) - - if frame.buffer is not None: - self.write(",") - - if frame.buffer is not None: - self.outdent() - self.writeline(")" if len(body) == 1 else "))") - - if frame.require_output_check: - self.outdent() - - def visit_Assign(self, node, frame): - self.push_assign_tracking() - self.newline(node) - self.visit(node.target, frame) - self.write(" = ") - self.visit(node.node, frame) - self.pop_assign_tracking(frame) - - def visit_AssignBlock(self, node, frame): - self.push_assign_tracking() - block_frame = frame.inner() - # This is a special case. Since a set block always captures we - # will disable output checks. This way one can use set blocks - # toplevel even in extended templates. - block_frame.require_output_check = False - block_frame.symbols.analyze_node(node) - self.enter_frame(block_frame) - self.buffer(block_frame) - self.blockvisit(node.body, block_frame) - self.newline(node) - self.visit(node.target, frame) - self.write(" = (Markup if context.eval_ctx.autoescape else identity)(") - if node.filter is not None: - self.visit_Filter(node.filter, block_frame) - else: - self.write(f"concat({block_frame.buffer})") - self.write(")") - self.pop_assign_tracking(frame) - self.leave_frame(block_frame) - - # -- Expression Visitors - - def visit_Name(self, node, frame): - if node.ctx == "store" and frame.toplevel: - if self._assign_stack: - self._assign_stack[-1].add(node.name) - ref = frame.symbols.ref(node.name) - - # If we are looking up a variable we might have to deal with the - # case where it's undefined. We can skip that case if the load - # instruction indicates a parameter which are always defined. - if node.ctx == "load": - load = frame.symbols.find_load(ref) - if not ( - load is not None - and load[0] == VAR_LOAD_PARAMETER - and not self.parameter_is_undeclared(ref) - ): - self.write( - f"(undefined(name={node.name!r}) if {ref} is missing else {ref})" - ) - return - - self.write(ref) - - def visit_NSRef(self, node, frame): - # NSRefs can only be used to store values; since they use the normal - # `foo.bar` notation they will be parsed as a normal attribute access - # when used anywhere but in a `set` context - ref = frame.symbols.ref(node.name) - self.writeline(f"if not isinstance({ref}, Namespace):") - self.indent() - self.writeline( - "raise TemplateRuntimeError" - '("cannot assign attribute on non-namespace object")' - ) - self.outdent() - self.writeline(f"{ref}[{node.attr!r}]") - - def visit_Const(self, node, frame): - val = node.as_const(frame.eval_ctx) - if isinstance(val, float): - self.write(str(val)) - else: - self.write(repr(val)) - - def visit_TemplateData(self, node, frame): - try: - self.write(repr(node.as_const(frame.eval_ctx))) - except nodes.Impossible: - self.write( - f"(Markup if context.eval_ctx.autoescape else identity)({node.data!r})" - ) - - def visit_Tuple(self, node, frame): - self.write("(") - idx = -1 - for idx, item in enumerate(node.items): - if idx: - self.write(", ") - self.visit(item, frame) - self.write(",)" if idx == 0 else ")") - - def visit_List(self, node, frame): - self.write("[") - for idx, item in enumerate(node.items): - if idx: - self.write(", ") - self.visit(item, frame) - self.write("]") - - def visit_Dict(self, node, frame): - self.write("{") - for idx, item in enumerate(node.items): - if idx: - self.write(", ") - self.visit(item.key, frame) - self.write(": ") - self.visit(item.value, frame) - self.write("}") - - def binop(operator, interceptable=True): # noqa: B902 - @optimizeconst - def visitor(self, node, frame): - if ( - self.environment.sandboxed - and operator in self.environment.intercepted_binops - ): - self.write(f"environment.call_binop(context, {operator!r}, ") - self.visit(node.left, frame) - self.write(", ") - self.visit(node.right, frame) - else: - self.write("(") - self.visit(node.left, frame) - self.write(f" {operator} ") - self.visit(node.right, frame) - self.write(")") - - return visitor - - def uaop(operator, interceptable=True): # noqa: B902 - @optimizeconst - def visitor(self, node, frame): - if ( - self.environment.sandboxed - and operator in self.environment.intercepted_unops - ): - self.write(f"environment.call_unop(context, {operator!r}, ") - self.visit(node.node, frame) - else: - self.write("(" + operator) - self.visit(node.node, frame) - self.write(")") - - return visitor - - visit_Add = binop("+") - visit_Sub = binop("-") - visit_Mul = binop("*") - visit_Div = binop("/") - visit_FloorDiv = binop("//") - visit_Pow = binop("**") - visit_Mod = binop("%") - visit_And = binop("and", interceptable=False) - visit_Or = binop("or", interceptable=False) - visit_Pos = uaop("+") - visit_Neg = uaop("-") - visit_Not = uaop("not ", interceptable=False) - del binop, uaop - - @optimizeconst - def visit_Concat(self, node, frame): - if frame.eval_ctx.volatile: - func_name = "(markup_join if context.eval_ctx.volatile else str_join)" - elif frame.eval_ctx.autoescape: - func_name = "markup_join" - else: - func_name = "str_join" - self.write(f"{func_name}((") - for arg in node.nodes: - self.visit(arg, frame) - self.write(", ") - self.write("))") - - @optimizeconst - def visit_Compare(self, node, frame): - self.write("(") - self.visit(node.expr, frame) - for op in node.ops: - self.visit(op, frame) - self.write(")") - - def visit_Operand(self, node, frame): - self.write(f" {operators[node.op]} ") - self.visit(node.expr, frame) - - @optimizeconst - def visit_Getattr(self, node, frame): - if self.environment.is_async: - self.write("(await auto_await(") - - self.write("environment.getattr(") - self.visit(node.node, frame) - self.write(f", {node.attr!r})") - - if self.environment.is_async: - self.write("))") - - @optimizeconst - def visit_Getitem(self, node, frame): - # slices bypass the environment getitem method. - if isinstance(node.arg, nodes.Slice): - self.visit(node.node, frame) - self.write("[") - self.visit(node.arg, frame) - self.write("]") - else: - if self.environment.is_async: - self.write("(await auto_await(") - - self.write("environment.getitem(") - self.visit(node.node, frame) - self.write(", ") - self.visit(node.arg, frame) - self.write(")") - - if self.environment.is_async: - self.write("))") - - def visit_Slice(self, node, frame): - if node.start is not None: - self.visit(node.start, frame) - self.write(":") - if node.stop is not None: - self.visit(node.stop, frame) - if node.step is not None: - self.write(":") - self.visit(node.step, frame) - - @optimizeconst - def visit_Filter(self, node, frame): - if self.environment.is_async: - self.write("await auto_await(") - self.write(self.filters[node.name] + "(") - func = self.environment.filters.get(node.name) - if func is None: - self.fail(f"no filter named {node.name!r}", node.lineno) - if getattr(func, "contextfilter", False) is True: - self.write("context, ") - elif getattr(func, "evalcontextfilter", False) is True: - self.write("context.eval_ctx, ") - elif getattr(func, "environmentfilter", False) is True: - self.write("environment, ") - - # if the filter node is None we are inside a filter block - # and want to write to the current buffer - if node.node is not None: - self.visit(node.node, frame) - elif frame.eval_ctx.volatile: - self.write( - f"(Markup(concat({frame.buffer}))" - f" if context.eval_ctx.autoescape else concat({frame.buffer}))" - ) - elif frame.eval_ctx.autoescape: - self.write(f"Markup(concat({frame.buffer}))") - else: - self.write(f"concat({frame.buffer})") - self.signature(node, frame) - self.write(")") - if self.environment.is_async: - self.write(")") - - @optimizeconst - def visit_Test(self, node, frame): - self.write(self.tests[node.name] + "(") - if node.name not in self.environment.tests: - self.fail(f"no test named {node.name!r}", node.lineno) - self.visit(node.node, frame) - self.signature(node, frame) - self.write(")") - - @optimizeconst - def visit_CondExpr(self, node, frame): - def write_expr2(): - if node.expr2 is not None: - return self.visit(node.expr2, frame) - self.write( - f'cond_expr_undefined("the inline if-expression on' - f" {self.position(node)} evaluated to false and no else" - f' section was defined.")' - ) - - self.write("(") - self.visit(node.expr1, frame) - self.write(" if ") - self.visit(node.test, frame) - self.write(" else ") - write_expr2() - self.write(")") - - @optimizeconst - def visit_Call(self, node, frame, forward_caller=False): - if self.environment.is_async: - self.write("await auto_await(") - if self.environment.sandboxed: - self.write("environment.call(context, ") - else: - self.write("context.call(") - self.visit(node.node, frame) - extra_kwargs = {"caller": "caller"} if forward_caller else None - self.signature(node, frame, extra_kwargs) - self.write(")") - if self.environment.is_async: - self.write(")") - - def visit_Keyword(self, node, frame): - self.write(node.key + "=") - self.visit(node.value, frame) - - # -- Unused nodes for extensions - - def visit_MarkSafe(self, node, frame): - self.write("Markup(") - self.visit(node.expr, frame) - self.write(")") - - def visit_MarkSafeIfAutoescape(self, node, frame): - self.write("(Markup if context.eval_ctx.autoescape else identity)(") - self.visit(node.expr, frame) - self.write(")") - - def visit_EnvironmentAttribute(self, node, frame): - self.write("environment." + node.name) - - def visit_ExtensionAttribute(self, node, frame): - self.write(f"environment.extensions[{node.identifier!r}].{node.name}") - - def visit_ImportedName(self, node, frame): - self.write(self.import_aliases[node.importname]) - - def visit_InternalName(self, node, frame): - self.write(node.name) - - def visit_ContextReference(self, node, frame): - self.write("context") - - def visit_DerivedContextReference(self, node, frame): - self.write(self.derive_context(frame)) - - def visit_Continue(self, node, frame): - self.writeline("continue", node) - - def visit_Break(self, node, frame): - self.writeline("break", node) - - def visit_Scope(self, node, frame): - scope_frame = frame.inner() - scope_frame.symbols.analyze_node(node) - self.enter_frame(scope_frame) - self.blockvisit(node.body, scope_frame) - self.leave_frame(scope_frame) - - def visit_OverlayScope(self, node, frame): - ctx = self.temporary_identifier() - self.writeline(f"{ctx} = {self.derive_context(frame)}") - self.writeline(f"{ctx}.vars = ") - self.visit(node.context, frame) - self.push_context_reference(ctx) - - scope_frame = frame.inner(isolated=True) - scope_frame.symbols.analyze_node(node) - self.enter_frame(scope_frame) - self.blockvisit(node.body, scope_frame) - self.leave_frame(scope_frame) - self.pop_context_reference() - - def visit_EvalContextModifier(self, node, frame): - for keyword in node.options: - self.writeline(f"context.eval_ctx.{keyword.key} = ") - self.visit(keyword.value, frame) - try: - val = keyword.value.as_const(frame.eval_ctx) - except nodes.Impossible: - frame.eval_ctx.volatile = True - else: - setattr(frame.eval_ctx, keyword.key, val) - - def visit_ScopedEvalContextModifier(self, node, frame): - old_ctx_name = self.temporary_identifier() - saved_ctx = frame.eval_ctx.save() - self.writeline(f"{old_ctx_name} = context.eval_ctx.save()") - self.visit_EvalContextModifier(node, frame) - for child in node.body: - self.visit(child, frame) - frame.eval_ctx.revert(saved_ctx) - self.writeline(f"context.eval_ctx.revert({old_ctx_name})") diff --git a/src/jinja2/constants.py b/src/jinja2/constants.py deleted file mode 100644 index 41a1c23b..00000000 --- a/src/jinja2/constants.py +++ /dev/null @@ -1,20 +0,0 @@ -#: list of lorem ipsum words used by the lipsum() helper function -LOREM_IPSUM_WORDS = """\ -a ac accumsan ad adipiscing aenean aliquam aliquet amet ante aptent arcu at -auctor augue bibendum blandit class commodo condimentum congue consectetuer -consequat conubia convallis cras cubilia cum curabitur curae cursus dapibus -diam dictum dictumst dignissim dis dolor donec dui duis egestas eget eleifend -elementum elit enim erat eros est et etiam eu euismod facilisi facilisis fames -faucibus felis fermentum feugiat fringilla fusce gravida habitant habitasse hac -hendrerit hymenaeos iaculis id imperdiet in inceptos integer interdum ipsum -justo lacinia lacus laoreet lectus leo libero ligula litora lobortis lorem -luctus maecenas magna magnis malesuada massa mattis mauris metus mi molestie -mollis montes morbi mus nam nascetur natoque nec neque netus nibh nisi nisl non -nonummy nostra nulla nullam nunc odio orci ornare parturient pede pellentesque -penatibus per pharetra phasellus placerat platea porta porttitor posuere -potenti praesent pretium primis proin pulvinar purus quam quis quisque rhoncus -ridiculus risus rutrum sagittis sapien scelerisque sed sem semper senectus sit -sociis sociosqu sodales sollicitudin suscipit suspendisse taciti tellus tempor -tempus tincidunt torquent tortor tristique turpis ullamcorper ultrices -ultricies urna ut varius vehicula vel velit venenatis vestibulum vitae vivamus -viverra volutpat vulputate""" diff --git a/src/jinja2/debug.py b/src/jinja2/debug.py deleted file mode 100644 index 5cac28ba..00000000 --- a/src/jinja2/debug.py +++ /dev/null @@ -1,261 +0,0 @@ -import platform -import sys -from types import CodeType - -from . import TemplateSyntaxError -from .utils import internal_code -from .utils import missing - - -def rewrite_traceback_stack(source=None): - """Rewrite the current exception to replace any tracebacks from - within compiled template code with tracebacks that look like they - came from the template source. - - This must be called within an ``except`` block. - - :param source: For ``TemplateSyntaxError``, the original source if - known. - :return: The original exception with the rewritten traceback. - """ - _, exc_value, tb = sys.exc_info() - - if isinstance(exc_value, TemplateSyntaxError) and not exc_value.translated: - exc_value.translated = True - exc_value.source = source - # Remove the old traceback, otherwise the frames from the - # compiler still show up. - exc_value.with_traceback(None) - # Outside of runtime, so the frame isn't executing template - # code, but it still needs to point at the template. - tb = fake_traceback( - exc_value, None, exc_value.filename or "", exc_value.lineno - ) - else: - # Skip the frame for the render function. - tb = tb.tb_next - - stack = [] - - # Build the stack of traceback object, replacing any in template - # code with the source file and line information. - while tb is not None: - # Skip frames decorated with @internalcode. These are internal - # calls that aren't useful in template debugging output. - if tb.tb_frame.f_code in internal_code: - tb = tb.tb_next - continue - - template = tb.tb_frame.f_globals.get("__jinja_template__") - - if template is not None: - lineno = template.get_corresponding_lineno(tb.tb_lineno) - fake_tb = fake_traceback(exc_value, tb, template.filename, lineno) - stack.append(fake_tb) - else: - stack.append(tb) - - tb = tb.tb_next - - tb_next = None - - # Assign tb_next in reverse to avoid circular references. - for tb in reversed(stack): - tb_next = tb_set_next(tb, tb_next) - - return exc_value.with_traceback(tb_next) - - -def fake_traceback(exc_value, tb, filename, lineno): - """Produce a new traceback object that looks like it came from the - template source instead of the compiled code. The filename, line - number, and location name will point to the template, and the local - variables will be the current template context. - - :param exc_value: The original exception to be re-raised to create - the new traceback. - :param tb: The original traceback to get the local variables and - code info from. - :param filename: The template filename. - :param lineno: The line number in the template source. - """ - if tb is not None: - # Replace the real locals with the context that would be - # available at that point in the template. - locals = get_template_locals(tb.tb_frame.f_locals) - locals.pop("__jinja_exception__", None) - else: - locals = {} - - globals = { - "__name__": filename, - "__file__": filename, - "__jinja_exception__": exc_value, - } - # Raise an exception at the correct line number. - code = compile("\n" * (lineno - 1) + "raise __jinja_exception__", filename, "exec") - - # Build a new code object that points to the template file and - # replaces the location with a block name. - try: - location = "template" - - if tb is not None: - function = tb.tb_frame.f_code.co_name - - if function == "root": - location = "top-level template code" - elif function.startswith("block_"): - location = f"block {function[6:]!r}" - - # Collect arguments for the new code object. CodeType only - # accepts positional arguments, and arguments were inserted in - # new Python versions. - code_args = [] - - for attr in ( - "argcount", - "posonlyargcount", # Python 3.8 - "kwonlyargcount", - "nlocals", - "stacksize", - "flags", - "code", # codestring - "consts", # constants - "names", - "varnames", - ("filename", filename), - ("name", location), - "firstlineno", - "lnotab", - "freevars", - "cellvars", - ): - if isinstance(attr, tuple): - # Replace with given value. - code_args.append(attr[1]) - continue - - try: - # Copy original value if it exists. - code_args.append(getattr(code, "co_" + attr)) - except AttributeError: - # Some arguments were added later. - continue - - code = CodeType(*code_args) - except Exception: - # Some environments such as Google App Engine don't support - # modifying code objects. - pass - - # Execute the new code, which is guaranteed to raise, and return - # the new traceback without this frame. - try: - exec(code, globals, locals) - except BaseException: - return sys.exc_info()[2].tb_next - - -def get_template_locals(real_locals): - """Based on the runtime locals, get the context that would be - available at that point in the template. - """ - # Start with the current template context. - ctx = real_locals.get("context") - - if ctx: - data = ctx.get_all().copy() - else: - data = {} - - # Might be in a derived context that only sets local variables - # rather than pushing a context. Local variables follow the scheme - # l_depth_name. Find the highest-depth local that has a value for - # each name. - local_overrides = {} - - for name, value in real_locals.items(): - if not name.startswith("l_") or value is missing: - # Not a template variable, or no longer relevant. - continue - - try: - _, depth, name = name.split("_", 2) - depth = int(depth) - except ValueError: - continue - - cur_depth = local_overrides.get(name, (-1,))[0] - - if cur_depth < depth: - local_overrides[name] = (depth, value) - - # Modify the context with any derived context. - for name, (_, value) in local_overrides.items(): - if value is missing: - data.pop(name, None) - else: - data[name] = value - - return data - - -if sys.version_info >= (3, 7): - # tb_next is directly assignable as of Python 3.7 - def tb_set_next(tb, tb_next): - tb.tb_next = tb_next - return tb - - -elif platform.python_implementation() == "PyPy": - # PyPy might have special support, and won't work with ctypes. - try: - import tputil - except ImportError: - # Without tproxy support, use the original traceback. - def tb_set_next(tb, tb_next): - return tb - - else: - # With tproxy support, create a proxy around the traceback that - # returns the new tb_next. - def tb_set_next(tb, tb_next): - def controller(op): - if op.opname == "__getattribute__" and op.args[0] == "tb_next": - return tb_next - - return op.delegate() - - return tputil.make_proxy(controller, obj=tb) - - -else: - # Use ctypes to assign tb_next at the C level since it's read-only - # from Python. - import ctypes - - class _CTraceback(ctypes.Structure): - _fields_ = [ - # Extra PyObject slots when compiled with Py_TRACE_REFS. - ("PyObject_HEAD", ctypes.c_byte * object().__sizeof__()), - # Only care about tb_next as an object, not a traceback. - ("tb_next", ctypes.py_object), - ] - - def tb_set_next(tb, tb_next): - c_tb = _CTraceback.from_address(id(tb)) - - # Clear out the old tb_next. - if tb.tb_next is not None: - c_tb_next = ctypes.py_object(tb.tb_next) - c_tb.tb_next = ctypes.py_object() - ctypes.pythonapi.Py_DecRef(c_tb_next) - - # Assign the new tb_next. - if tb_next is not None: - c_tb_next = ctypes.py_object(tb_next) - ctypes.pythonapi.Py_IncRef(c_tb_next) - c_tb.tb_next = c_tb_next - - return tb diff --git a/src/jinja2/defaults.py b/src/jinja2/defaults.py deleted file mode 100644 index 1f0b0ab0..00000000 --- a/src/jinja2/defaults.py +++ /dev/null @@ -1,42 +0,0 @@ -from .filters import FILTERS as DEFAULT_FILTERS # noqa: F401 -from .tests import TESTS as DEFAULT_TESTS # noqa: F401 -from .utils import Cycler -from .utils import generate_lorem_ipsum -from .utils import Joiner -from .utils import Namespace - -# defaults for the parser / lexer -BLOCK_START_STRING = "{%" -BLOCK_END_STRING = "%}" -VARIABLE_START_STRING = "{{" -VARIABLE_END_STRING = "}}" -COMMENT_START_STRING = "{#" -COMMENT_END_STRING = "#}" -LINE_STATEMENT_PREFIX = None -LINE_COMMENT_PREFIX = None -TRIM_BLOCKS = False -LSTRIP_BLOCKS = False -NEWLINE_SEQUENCE = "\n" -KEEP_TRAILING_NEWLINE = False - -# default filters, tests and namespace - -DEFAULT_NAMESPACE = { - "range": range, - "dict": dict, - "lipsum": generate_lorem_ipsum, - "cycler": Cycler, - "joiner": Joiner, - "namespace": Namespace, -} - -# default policies -DEFAULT_POLICIES = { - "compiler.ascii_str": True, - "urlize.rel": "noopener", - "urlize.target": None, - "truncate.leeway": 5, - "json.dumps_function": None, - "json.dumps_kwargs": {"sort_keys": True}, - "ext.i18n.trimmed": False, -} diff --git a/src/jinja2/environment.py b/src/jinja2/environment.py deleted file mode 100644 index 556f7255..00000000 --- a/src/jinja2/environment.py +++ /dev/null @@ -1,1331 +0,0 @@ -"""Classes for managing templates and their runtime and compile time -options. -""" -import os -import sys -import weakref -from functools import partial -from functools import reduce - -from markupsafe import Markup - -from . import nodes -from .compiler import CodeGenerator -from .compiler import generate -from .defaults import BLOCK_END_STRING -from .defaults import BLOCK_START_STRING -from .defaults import COMMENT_END_STRING -from .defaults import COMMENT_START_STRING -from .defaults import DEFAULT_FILTERS -from .defaults import DEFAULT_NAMESPACE -from .defaults import DEFAULT_POLICIES -from .defaults import DEFAULT_TESTS -from .defaults import KEEP_TRAILING_NEWLINE -from .defaults import LINE_COMMENT_PREFIX -from .defaults import LINE_STATEMENT_PREFIX -from .defaults import LSTRIP_BLOCKS -from .defaults import NEWLINE_SEQUENCE -from .defaults import TRIM_BLOCKS -from .defaults import VARIABLE_END_STRING -from .defaults import VARIABLE_START_STRING -from .exceptions import TemplateNotFound -from .exceptions import TemplateRuntimeError -from .exceptions import TemplatesNotFound -from .exceptions import TemplateSyntaxError -from .exceptions import UndefinedError -from .lexer import get_lexer -from .lexer import TokenStream -from .nodes import EvalContext -from .parser import Parser -from .runtime import Context -from .runtime import new_context -from .runtime import Undefined -from .utils import concat -from .utils import consume -from .utils import have_async_gen -from .utils import import_string -from .utils import internalcode -from .utils import LRUCache -from .utils import missing - -# for direct template usage we have up to ten living environments -_spontaneous_environments = LRUCache(10) - - -def get_spontaneous_environment(cls, *args): - """Return a new spontaneous environment. A spontaneous environment - is used for templates created directly rather than through an - existing environment. - - :param cls: Environment class to create. - :param args: Positional arguments passed to environment. - """ - key = (cls, args) - - try: - return _spontaneous_environments[key] - except KeyError: - _spontaneous_environments[key] = env = cls(*args) - env.shared = True - return env - - -def create_cache(size): - """Return the cache class for the given size.""" - if size == 0: - return None - if size < 0: - return {} - return LRUCache(size) - - -def copy_cache(cache): - """Create an empty copy of the given cache.""" - if cache is None: - return None - elif type(cache) is dict: - return {} - return LRUCache(cache.capacity) - - -def load_extensions(environment, extensions): - """Load the extensions from the list and bind it to the environment. - Returns a dict of instantiated environments. - """ - result = {} - for extension in extensions: - if isinstance(extension, str): - extension = import_string(extension) - result[extension.identifier] = extension(environment) - return result - - -def fail_for_missing_callable(thing, name): - msg = f"no {thing} named {name!r}" - - if isinstance(name, Undefined): - try: - name._fail_with_undefined_error() - except Exception as e: - msg = f"{msg} ({e}; did you forget to quote the callable name?)" - raise TemplateRuntimeError(msg) - - -def _environment_sanity_check(environment): - """Perform a sanity check on the environment.""" - assert issubclass( - environment.undefined, Undefined - ), "undefined must be a subclass of undefined because filters depend on it." - assert ( - environment.block_start_string - != environment.variable_start_string - != environment.comment_start_string - ), "block, variable and comment start strings must be different" - assert environment.newline_sequence in { - "\r", - "\r\n", - "\n", - }, "newline_sequence set to unknown line ending string." - return environment - - -class Environment: - r"""The core component of Jinja is the `Environment`. It contains - important shared variables like configuration, filters, tests, - globals and others. Instances of this class may be modified if - they are not shared and if no template was loaded so far. - Modifications on environments after the first template was loaded - will lead to surprising effects and undefined behavior. - - Here are the possible initialization parameters: - - `block_start_string` - The string marking the beginning of a block. Defaults to ``'{%'``. - - `block_end_string` - The string marking the end of a block. Defaults to ``'%}'``. - - `variable_start_string` - The string marking the beginning of a print statement. - Defaults to ``'{{'``. - - `variable_end_string` - The string marking the end of a print statement. Defaults to - ``'}}'``. - - `comment_start_string` - The string marking the beginning of a comment. Defaults to ``'{#'``. - - `comment_end_string` - The string marking the end of a comment. Defaults to ``'#}'``. - - `line_statement_prefix` - If given and a string, this will be used as prefix for line based - statements. See also :ref:`line-statements`. - - `line_comment_prefix` - If given and a string, this will be used as prefix for line based - comments. See also :ref:`line-statements`. - - .. versionadded:: 2.2 - - `trim_blocks` - If this is set to ``True`` the first newline after a block is - removed (block, not variable tag!). Defaults to `False`. - - `lstrip_blocks` - If this is set to ``True`` leading spaces and tabs are stripped - from the start of a line to a block. Defaults to `False`. - - `newline_sequence` - The sequence that starts a newline. Must be one of ``'\r'``, - ``'\n'`` or ``'\r\n'``. The default is ``'\n'`` which is a - useful default for Linux and OS X systems as well as web - applications. - - `keep_trailing_newline` - Preserve the trailing newline when rendering templates. - The default is ``False``, which causes a single newline, - if present, to be stripped from the end of the template. - - .. versionadded:: 2.7 - - `extensions` - List of Jinja extensions to use. This can either be import paths - as strings or extension classes. For more information have a - look at :ref:`the extensions documentation `. - - `optimized` - should the optimizer be enabled? Default is ``True``. - - `undefined` - :class:`Undefined` or a subclass of it that is used to represent - undefined values in the template. - - `finalize` - A callable that can be used to process the result of a variable - expression before it is output. For example one can convert - ``None`` implicitly into an empty string here. - - `autoescape` - If set to ``True`` the XML/HTML autoescaping feature is enabled by - default. For more details about autoescaping see - :class:`~markupsafe.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. - - `cache_size` - The size of the cache. Per default this is ``400`` which means - that if more than 400 templates are loaded the loader will clean - out the least recently used template. If the cache size is set to - ``0`` templates are recompiled all the time, if the cache size is - ``-1`` the cache will not be cleaned. - - .. versionchanged:: 2.8 - The cache size was increased to 400 from a low 50. - - `auto_reload` - Some loaders load templates from locations where the template - sources may change (ie: file system or database). If - ``auto_reload`` is set to ``True`` (default) every time a template is - requested the loader checks if the source changed and if yes, it - will reload the template. For higher performance it's possible to - disable that. - - `bytecode_cache` - If set to a bytecode cache object, this object will provide a - cache for the internal Jinja bytecode so that templates don't - have to be parsed if they were not changed. - - See :ref:`bytecode-cache` for more information. - - `enable_async` - If set to true this enables async template execution which - allows using async functions and generators. - """ - - #: 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. This flag alone controls the code - #: generation by the compiler. - sandboxed = False - - #: True if the environment is just an overlay - overlayed = False - - #: the environment this environment is linked to if it is an overlay - linked_to = None - - #: shared environments have this set to `True`. A shared environment - #: must not be modified - shared = False - - #: the class that is used for code generation. See - #: :class:`~jinja2.compiler.CodeGenerator` for more information. - code_generator_class = CodeGenerator - - #: the context class thatis used for templates. See - #: :class:`~jinja2.runtime.Context` for more information. - context_class = Context - - def __init__( - self, - block_start_string=BLOCK_START_STRING, - block_end_string=BLOCK_END_STRING, - variable_start_string=VARIABLE_START_STRING, - variable_end_string=VARIABLE_END_STRING, - comment_start_string=COMMENT_START_STRING, - comment_end_string=COMMENT_END_STRING, - line_statement_prefix=LINE_STATEMENT_PREFIX, - line_comment_prefix=LINE_COMMENT_PREFIX, - trim_blocks=TRIM_BLOCKS, - lstrip_blocks=LSTRIP_BLOCKS, - newline_sequence=NEWLINE_SEQUENCE, - keep_trailing_newline=KEEP_TRAILING_NEWLINE, - extensions=(), - optimized=True, - undefined=Undefined, - finalize=None, - autoescape=False, - loader=None, - cache_size=400, - auto_reload=True, - bytecode_cache=None, - enable_async=False, - ): - # !!Important notice!! - # The constructor accepts quite a few arguments that should be - # passed by keyword rather than position. However it's important to - # not change the order of arguments because it's used at least - # internally in those cases: - # - spontaneous environments (i18n extension and Template) - # - unittests - # If parameter changes are required only add parameters at the end - # and don't change the arguments (or the defaults!) of the arguments - # existing already. - - # lexer / parser information - self.block_start_string = block_start_string - self.block_end_string = block_end_string - self.variable_start_string = variable_start_string - self.variable_end_string = variable_end_string - self.comment_start_string = comment_start_string - self.comment_end_string = comment_end_string - self.line_statement_prefix = line_statement_prefix - self.line_comment_prefix = line_comment_prefix - self.trim_blocks = trim_blocks - self.lstrip_blocks = lstrip_blocks - self.newline_sequence = newline_sequence - self.keep_trailing_newline = keep_trailing_newline - - # runtime information - self.undefined = undefined - self.optimized = optimized - self.finalize = finalize - self.autoescape = autoescape - - # defaults - self.filters = DEFAULT_FILTERS.copy() - self.tests = DEFAULT_TESTS.copy() - self.globals = DEFAULT_NAMESPACE.copy() - - # set the loader provided - self.loader = loader - self.cache = create_cache(cache_size) - self.bytecode_cache = bytecode_cache - self.auto_reload = auto_reload - - # configurable policies - self.policies = DEFAULT_POLICIES.copy() - - # load extensions - self.extensions = load_extensions(self, extensions) - - self.enable_async = enable_async - self.is_async = self.enable_async and have_async_gen - if self.is_async: - # runs patch_all() to enable async support - from . import asyncsupport # noqa: F401 - - _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 ` to register - callbacks and configuration values without breaking inheritance. - """ - for key, value in attributes.items(): - if not hasattr(self, key): - setattr(self, key, value) - - def overlay( - self, - block_start_string=missing, - block_end_string=missing, - variable_start_string=missing, - variable_end_string=missing, - comment_start_string=missing, - comment_end_string=missing, - line_statement_prefix=missing, - line_comment_prefix=missing, - trim_blocks=missing, - lstrip_blocks=missing, - extensions=missing, - optimized=missing, - undefined=missing, - finalize=missing, - autoescape=missing, - loader=missing, - cache_size=missing, - auto_reload=missing, - bytecode_cache=missing, - ): - """Create a new overlay environment that shares all the data with the - current environment except for cache and the overridden attributes. - Extensions cannot be removed for an overlayed environment. An overlayed - environment automatically gets all the extensions of the environment it - is linked to plus optional extra extensions. - - Creating overlays should happen after the initial environment was set - up completely. Not all attributes are truly linked, some are just - copied over so modifications on the original environment may not shine - through. - """ - args = dict(locals()) - del args["self"], args["cache_size"], args["extensions"] - - rv = object.__new__(self.__class__) - rv.__dict__.update(self.__dict__) - rv.overlayed = True - rv.linked_to = self - - for key, value in args.items(): - if value is not missing: - setattr(rv, key, value) - - if cache_size is not missing: - rv.cache = create_cache(cache_size) - else: - rv.cache = copy_cache(self.cache) - - rv.extensions = {} - for key, value in self.extensions.items(): - rv.extensions[key] = value.bind(rv) - if extensions is not missing: - 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: - return obj[argument] - except (AttributeError, TypeError, LookupError): - if isinstance(argument, str): - try: - attr = str(argument) - except Exception: - pass - else: - try: - return getattr(obj, attr) - except AttributeError: - pass - return self.undefined(obj=obj, name=argument) - - def getattr(self, obj, attribute): - """Get an item or attribute of an object but prefer the attribute. - Unlike :meth:`getitem` the attribute *must* be a bytestring. - """ - try: - return getattr(obj, attribute) - except AttributeError: - pass - try: - return obj[attribute] - except (TypeError, LookupError, AttributeError): - return self.undefined(obj=obj, name=attribute) - - def call_filter( - self, name, value, args=None, kwargs=None, context=None, eval_ctx=None - ): - """Invokes a filter on a value the same way the compiler does. - - This might return a coroutine if the filter is running from an - environment in async mode and the filter supports async - execution. It's your responsibility to await this if needed. - - .. versionadded:: 2.7 - """ - func = self.filters.get(name) - if func is None: - fail_for_missing_callable("filter", name) - args = [value] + list(args or ()) - if getattr(func, "contextfilter", False) is True: - if context is None: - raise TemplateRuntimeError( - "Attempted to invoke context filter without context" - ) - args.insert(0, context) - elif getattr(func, "evalcontextfilter", False) is True: - if eval_ctx is None: - if context is not None: - eval_ctx = context.eval_ctx - else: - eval_ctx = EvalContext(self) - args.insert(0, eval_ctx) - elif getattr(func, "environmentfilter", False) is True: - args.insert(0, self) - return func(*args, **(kwargs or {})) - - def call_test(self, name, value, args=None, kwargs=None): - """Invokes a test on a value the same way the compiler does it. - - .. versionadded:: 2.7 - """ - func = self.tests.get(name) - if func is None: - fail_for_missing_callable("test", name) - return func(value, *(args or ()), **(kwargs or {})) - - @internalcode - def parse(self, source, name=None, filename=None): - """Parse the sourcecode and return the abstract syntax tree. This - tree of nodes is used by the compiler to convert the template into - executable source- or bytecode. This is useful for debugging or to - extract information from templates. - - If you are :ref:`developing Jinja extensions ` - this gives you a good overview of the node tree generated. - """ - try: - return self._parse(source, name, filename) - except TemplateSyntaxError: - self.handle_exception(source=source) - - def _parse(self, source, name, filename): - """Internal parsing function used by `parse` and `compile`.""" - return Parser(self, source, name, filename).parse() - - def lex(self, source, name=None, filename=None): - """Lex the given sourcecode and return a generator that yields - tokens as tuples in the form ``(lineno, token_type, value)``. - This can be useful for :ref:`extension development ` - and debugging templates. - - This does not perform preprocessing. If you want the preprocessing - of the extensions to be applied you have to filter source through - the :meth:`preprocess` method. - """ - source = str(source) - try: - return self.lexer.tokeniter(source, name, filename) - except TemplateSyntaxError: - self.handle_exception(source=source) - - def preprocess(self, source, name=None, filename=None): - """Preprocesses the source with all extensions. This is automatically - called for all parsing and compiling methods but *not* for :meth:`lex` - because there you usually only want the actual source tokenized. - """ - return reduce( - lambda s, e: e.preprocess(s, name, filename), - self.iter_extensions(), - str(source), - ) - - def _tokenize(self, source, name, filename=None, state=None): - """Called by the parser to do the preprocessing and filtering - for all the extensions. Returns a :class:`~jinja2.lexer.TokenStream`. - """ - source = self.preprocess(source, name, filename) - stream = self.lexer.tokenize(source, name, filename, state) - 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 overridden to hook a different generate - method in. - - .. versionadded:: 2.5 - """ - return generate( - source, - self, - name, - filename, - defer_init=defer_init, - optimized=self.optimized, - ) - - def _compile(self, source, filename): - """Internal hook that can be overridden 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, 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. - the `filename` parameter is the estimated filename of the template on - the file system. If the template came from a database or memory this - can be omitted. - - The return value of this method is a python code object. If the `raw` - 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: - if isinstance(source, str): - source_hint = source - source = self._parse(source, name, filename) - source = self._generate(source, name, filename, defer_init=defer_init) - if raw: - return source - if filename is None: - filename = "