shelve: fix broken backup of conflicting untracked file
Differential Revision: https://phab.mercurial-scm.org/D5852
# templateutil.py - utility for template evaluation
#
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
import abc
import types
from .i18n import _
from . import (
error,
pycompat,
util,
)
from .utils import (
dateutil,
stringutil,
)
class ResourceUnavailable(error.Abort):
pass
class TemplateNotFound(error.Abort):
pass
class wrapped(object):
"""Object requiring extra conversion prior to displaying or processing
as value
Use unwrapvalue() or unwrapastype() to obtain the inner object.
"""
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def contains(self, context, mapping, item):
"""Test if the specified item is in self
The item argument may be a wrapped object.
"""
@abc.abstractmethod
def getmember(self, context, mapping, key):
"""Return a member item for the specified key
The key argument may be a wrapped object.
A returned object may be either a wrapped object or a pure value
depending on the self type.
"""
@abc.abstractmethod
def getmin(self, context, mapping):
"""Return the smallest item, which may be either a wrapped or a pure
value depending on the self type"""
@abc.abstractmethod
def getmax(self, context, mapping):
"""Return the largest item, which may be either a wrapped or a pure
value depending on the self type"""
@abc.abstractmethod
def filter(self, context, mapping, select):
"""Return new container of the same type which includes only the
selected elements
select() takes each item as a wrapped object and returns True/False.
"""
@abc.abstractmethod
def itermaps(self, context):
"""Yield each template mapping"""
@abc.abstractmethod
def join(self, context, mapping, sep):
"""Join items with the separator; Returns a bytes or (possibly nested)
generator of bytes
A pre-configured template may be rendered per item if this container
holds unprintable items.
"""
@abc.abstractmethod
def show(self, context, mapping):
"""Return a bytes or (possibly nested) generator of bytes representing
the underlying object
A pre-configured template may be rendered if the underlying object is
not printable.
"""
@abc.abstractmethod
def tobool(self, context, mapping):
"""Return a boolean representation of the inner value"""
@abc.abstractmethod
def tovalue(self, context, mapping):
"""Move the inner value object out or create a value representation
A returned value must be serializable by templaterfilters.json().
"""
class mappable(object):
"""Object which can be converted to a single template mapping"""
def itermaps(self, context):
yield self.tomap(context)
@abc.abstractmethod
def tomap(self, context):
"""Create a single template mapping representing this"""
class wrappedbytes(wrapped):
"""Wrapper for byte string"""
def __init__(self, value):
self._value = value
def contains(self, context, mapping, item):
item = stringify(context, mapping, item)
return item in self._value
def getmember(self, context, mapping, key):
raise error.ParseError(_('%r is not a dictionary')
% pycompat.bytestr(self._value))
def getmin(self, context, mapping):
return self._getby(context, mapping, min)
def getmax(self, context, mapping):
return self._getby(context, mapping, max)
def _getby(self, context, mapping, func):
if not self._value:
raise error.ParseError(_('empty string'))
return func(pycompat.iterbytestr(self._value))
def filter(self, context, mapping, select):
raise error.ParseError(_('%r is not filterable')
% pycompat.bytestr(self._value))
def itermaps(self, context):
raise error.ParseError(_('%r is not iterable of mappings')
% pycompat.bytestr(self._value))
def join(self, context, mapping, sep):
return joinitems(pycompat.iterbytestr(self._value), sep)
def show(self, context, mapping):
return self._value
def tobool(self, context, mapping):
return bool(self._value)
def tovalue(self, context, mapping):
return self._value
class wrappedvalue(wrapped):
"""Generic wrapper for pure non-list/dict/bytes value"""
def __init__(self, value):
self._value = value
def contains(self, context, mapping, item):
raise error.ParseError(_("%r is not iterable") % self._value)
def getmember(self, context, mapping, key):
raise error.ParseError(_('%r is not a dictionary') % self._value)
def getmin(self, context, mapping):
raise error.ParseError(_("%r is not iterable") % self._value)
def getmax(self, context, mapping):
raise error.ParseError(_("%r is not iterable") % self._value)
def filter(self, context, mapping, select):
raise error.ParseError(_("%r is not iterable") % self._value)
def itermaps(self, context):
raise error.ParseError(_('%r is not iterable of mappings')
% self._value)
def join(self, context, mapping, sep):
raise error.ParseError(_('%r is not iterable') % self._value)
def show(self, context, mapping):
if self._value is None:
return b''
return pycompat.bytestr(self._value)
def tobool(self, context, mapping):
if self._value is None:
return False
if isinstance(self._value, bool):
return self._value
# otherwise evaluate as string, which means 0 is True
return bool(pycompat.bytestr(self._value))
def tovalue(self, context, mapping):
return self._value
class date(mappable, wrapped):
"""Wrapper for date tuple"""
def __init__(self, value, showfmt='%d %d'):
# value may be (float, int), but public interface shouldn't support
# floating-point timestamp
self._unixtime, self._tzoffset = map(int, value)
self._showfmt = showfmt
def contains(self, context, mapping, item):
raise error.ParseError(_('date is not iterable'))
def getmember(self, context, mapping, key):
raise error.ParseError(_('date is not a dictionary'))
def getmin(self, context, mapping):
raise error.ParseError(_('date is not iterable'))
def getmax(self, context, mapping):
raise error.ParseError(_('date is not iterable'))
def filter(self, context, mapping, select):
raise error.ParseError(_('date is not iterable'))
def join(self, context, mapping, sep):
raise error.ParseError(_("date is not iterable"))
def show(self, context, mapping):
return self._showfmt % (self._unixtime, self._tzoffset)
def tomap(self, context):
return {'unixtime': self._unixtime, 'tzoffset': self._tzoffset}
def tobool(self, context, mapping):
return True
def tovalue(self, context, mapping):
return (self._unixtime, self._tzoffset)
class hybrid(wrapped):
"""Wrapper for list or dict to support legacy template
This class allows us to handle both:
- "{files}" (legacy command-line-specific list hack) and
- "{files % '{file}\n'}" (hgweb-style with inlining and function support)
and to access raw values:
- "{ifcontains(file, files, ...)}", "{ifcontains(key, extras, ...)}"
- "{get(extras, key)}"
- "{files|json}"
"""
def __init__(self, gen, values, makemap, joinfmt, keytype=None):
self._gen = gen # generator or function returning generator
self._values = values
self._makemap = makemap
self._joinfmt = joinfmt
self._keytype = keytype # hint for 'x in y' where type(x) is unresolved
def contains(self, context, mapping, item):
item = unwrapastype(context, mapping, item, self._keytype)
return item in self._values
def getmember(self, context, mapping, key):
# TODO: maybe split hybrid list/dict types?
if not util.safehasattr(self._values, 'get'):
raise error.ParseError(_('not a dictionary'))
key = unwrapastype(context, mapping, key, self._keytype)
return self._wrapvalue(key, self._values.get(key))
def getmin(self, context, mapping):
return self._getby(context, mapping, min)
def getmax(self, context, mapping):
return self._getby(context, mapping, max)
def _getby(self, context, mapping, func):
if not self._values:
raise error.ParseError(_('empty sequence'))
val = func(self._values)
return self._wrapvalue(val, val)
def _wrapvalue(self, key, val):
if val is None:
return
if util.safehasattr(val, '_makemap'):
# a nested hybrid list/dict, which has its own way of map operation
return val
return hybriditem(None, key, val, self._makemap)
def filter(self, context, mapping, select):
if util.safehasattr(self._values, 'get'):
values = {k: v for k, v in self._values.iteritems()
if select(self._wrapvalue(k, v))}
else:
values = [v for v in self._values if select(self._wrapvalue(v, v))]
return hybrid(None, values, self._makemap, self._joinfmt, self._keytype)
def itermaps(self, context):
makemap = self._makemap
for x in self._values:
yield makemap(x)
def join(self, context, mapping, sep):
# TODO: switch gen to (context, mapping) API?
return joinitems((self._joinfmt(x) for x in self._values), sep)
def show(self, context, mapping):
# TODO: switch gen to (context, mapping) API?
gen = self._gen
if gen is None:
return self.join(context, mapping, ' ')
if callable(gen):
return gen()
return gen
def tobool(self, context, mapping):
return bool(self._values)
def tovalue(self, context, mapping):
# TODO: make it non-recursive for trivial lists/dicts
xs = self._values
if util.safehasattr(xs, 'get'):
return {k: unwrapvalue(context, mapping, v)
for k, v in xs.iteritems()}
return [unwrapvalue(context, mapping, x) for x in xs]
class hybriditem(mappable, wrapped):
"""Wrapper for non-list/dict object to support map operation
This class allows us to handle both:
- "{manifest}"
- "{manifest % '{rev}:{node}'}"
- "{manifest.rev}"
"""
def __init__(self, gen, key, value, makemap):
self._gen = gen # generator or function returning generator
self._key = key
self._value = value # may be generator of strings
self._makemap = makemap
def tomap(self, context):
return self._makemap(self._key)
def contains(self, context, mapping, item):
w = makewrapped(context, mapping, self._value)
return w.contains(context, mapping, item)
def getmember(self, context, mapping, key):
w = makewrapped(context, mapping, self._value)
return w.getmember(context, mapping, key)
def getmin(self, context, mapping):
w = makewrapped(context, mapping, self._value)
return w.getmin(context, mapping)
def getmax(self, context, mapping):
w = makewrapped(context, mapping, self._value)
return w.getmax(context, mapping)
def filter(self, context, mapping, select):
w = makewrapped(context, mapping, self._value)
return w.filter(context, mapping, select)
def join(self, context, mapping, sep):
w = makewrapped(context, mapping, self._value)
return w.join(context, mapping, sep)
def show(self, context, mapping):
# TODO: switch gen to (context, mapping) API?
gen = self._gen
if gen is None:
return pycompat.bytestr(self._value)
if callable(gen):
return gen()
return gen
def tobool(self, context, mapping):
w = makewrapped(context, mapping, self._value)
return w.tobool(context, mapping)
def tovalue(self, context, mapping):
return _unthunk(context, mapping, self._value)
class _mappingsequence(wrapped):
"""Wrapper for sequence of template mappings
This represents an inner template structure (i.e. a list of dicts),
which can also be rendered by the specified named/literal template.
Template mappings may be nested.
"""
def __init__(self, name=None, tmpl=None, sep=''):
if name is not None and tmpl is not None:
raise error.ProgrammingError('name and tmpl are mutually exclusive')
self._name = name
self._tmpl = tmpl
self._defaultsep = sep
def contains(self, context, mapping, item):
raise error.ParseError(_('not comparable'))
def getmember(self, context, mapping, key):
raise error.ParseError(_('not a dictionary'))
def getmin(self, context, mapping):
raise error.ParseError(_('not comparable'))
def getmax(self, context, mapping):
raise error.ParseError(_('not comparable'))
def filter(self, context, mapping, select):
# implement if necessary; we'll need a wrapped type for a mapping dict
raise error.ParseError(_('not filterable without template'))
def join(self, context, mapping, sep):
mapsiter = _iteroverlaymaps(context, mapping, self.itermaps(context))
if self._name:
itemiter = (context.process(self._name, m) for m in mapsiter)
elif self._tmpl:
itemiter = (context.expand(self._tmpl, m) for m in mapsiter)
else:
raise error.ParseError(_('not displayable without template'))
return joinitems(itemiter, sep)
def show(self, context, mapping):
return self.join(context, mapping, self._defaultsep)
def tovalue(self, context, mapping):
knownres = context.knownresourcekeys()
items = []
for nm in self.itermaps(context):
# drop internal resources (recursively) which shouldn't be displayed
lm = context.overlaymap(mapping, nm)
items.append({k: unwrapvalue(context, lm, v)
for k, v in nm.iteritems() if k not in knownres})
return items
class mappinggenerator(_mappingsequence):
"""Wrapper for generator of template mappings
The function ``make(context, *args)`` should return a generator of
mapping dicts.
"""
def __init__(self, make, args=(), name=None, tmpl=None, sep=''):
super(mappinggenerator, self).__init__(name, tmpl, sep)
self._make = make
self._args = args
def itermaps(self, context):
return self._make(context, *self._args)
def tobool(self, context, mapping):
return _nonempty(self.itermaps(context))
class mappinglist(_mappingsequence):
"""Wrapper for list of template mappings"""
def __init__(self, mappings, name=None, tmpl=None, sep=''):
super(mappinglist, self).__init__(name, tmpl, sep)
self._mappings = mappings
def itermaps(self, context):
return iter(self._mappings)
def tobool(self, context, mapping):
return bool(self._mappings)
class mappingdict(mappable, _mappingsequence):
"""Wrapper for a single template mapping
This isn't a sequence in a way that the underlying dict won't be iterated
as a dict, but shares most of the _mappingsequence functions.
"""
def __init__(self, mapping, name=None, tmpl=None):
super(mappingdict, self).__init__(name, tmpl)
self._mapping = mapping
def tomap(self, context):
return self._mapping
def tobool(self, context, mapping):
# no idea when a template mapping should be considered an empty, but
# a mapping dict should have at least one item in practice, so always
# mark this as non-empty.
return True
def tovalue(self, context, mapping):
return super(mappingdict, self).tovalue(context, mapping)[0]
class mappingnone(wrappedvalue):
"""Wrapper for None, but supports map operation
This represents None of Optional[mappable]. It's similar to
mapplinglist([]), but the underlying value is not [], but None.
"""
def __init__(self):
super(mappingnone, self).__init__(None)
def itermaps(self, context):
return iter([])
class mappedgenerator(wrapped):
"""Wrapper for generator of strings which acts as a list
The function ``make(context, *args)`` should return a generator of
byte strings, or a generator of (possibly nested) generators of byte
strings (i.e. a generator for a list of byte strings.)
"""
def __init__(self, make, args=()):
self._make = make
self._args = args
def contains(self, context, mapping, item):
item = stringify(context, mapping, item)
return item in self.tovalue(context, mapping)
def _gen(self, context):
return self._make(context, *self._args)
def getmember(self, context, mapping, key):
raise error.ParseError(_('not a dictionary'))
def getmin(self, context, mapping):
return self._getby(context, mapping, min)
def getmax(self, context, mapping):
return self._getby(context, mapping, max)
def _getby(self, context, mapping, func):
xs = self.tovalue(context, mapping)
if not xs:
raise error.ParseError(_('empty sequence'))
return func(xs)
@staticmethod
def _filteredgen(context, mapping, make, args, select):
for x in make(context, *args):
s = stringify(context, mapping, x)
if select(wrappedbytes(s)):
yield s
def filter(self, context, mapping, select):
args = (mapping, self._make, self._args, select)
return mappedgenerator(self._filteredgen, args)
def itermaps(self, context):
raise error.ParseError(_('list of strings is not mappable'))
def join(self, context, mapping, sep):
return joinitems(self._gen(context), sep)
def show(self, context, mapping):
return self.join(context, mapping, '')
def tobool(self, context, mapping):
return _nonempty(self._gen(context))
def tovalue(self, context, mapping):
return [stringify(context, mapping, x) for x in self._gen(context)]
def hybriddict(data, key='key', value='value', fmt=None, gen=None):
"""Wrap data to support both dict-like and string-like operations"""
prefmt = pycompat.identity
if fmt is None:
fmt = '%s=%s'
prefmt = pycompat.bytestr
return hybrid(gen, data, lambda k: {key: k, value: data[k]},
lambda k: fmt % (prefmt(k), prefmt(data[k])))
def hybridlist(data, name, fmt=None, gen=None):
"""Wrap data to support both list-like and string-like operations"""
prefmt = pycompat.identity
if fmt is None:
fmt = '%s'
prefmt = pycompat.bytestr
return hybrid(gen, data, lambda x: {name: x}, lambda x: fmt % prefmt(x))
def compatdict(context, mapping, name, data, key='key', value='value',
fmt=None, plural=None, separator=' '):
"""Wrap data like hybriddict(), but also supports old-style list template
This exists for backward compatibility with the old-style template. Use
hybriddict() for new template keywords.
"""
c = [{key: k, value: v} for k, v in data.iteritems()]
f = _showcompatlist(context, mapping, name, c, plural, separator)
return hybriddict(data, key=key, value=value, fmt=fmt, gen=f)
def compatlist(context, mapping, name, data, element=None, fmt=None,
plural=None, separator=' '):
"""Wrap data like hybridlist(), but also supports old-style list template
This exists for backward compatibility with the old-style template. Use
hybridlist() for new template keywords.
"""
f = _showcompatlist(context, mapping, name, data, plural, separator)
return hybridlist(data, name=element or name, fmt=fmt, gen=f)
def compatfilecopiesdict(context, mapping, name, copies):
"""Wrap list of (dest, source) file names to support old-style list
template and field names
This exists for backward compatibility. Use hybriddict for new template
keywords.
"""
# no need to provide {path} to old-style list template
c = [{'name': k, 'source': v} for k, v in copies]
f = _showcompatlist(context, mapping, name, c, plural='file_copies')
copies = util.sortdict(copies)
return hybrid(f, copies,
lambda k: {'name': k, 'path': k, 'source': copies[k]},
lambda k: '%s (%s)' % (k, copies[k]))
def compatfileslist(context, mapping, name, files):
"""Wrap list of file names to support old-style list template and field
names
This exists for backward compatibility. Use hybridlist for new template
keywords.
"""
f = _showcompatlist(context, mapping, name, files)
return hybrid(f, files, lambda x: {'file': x, 'path': x},
pycompat.identity)
def _showcompatlist(context, mapping, name, values, plural=None, separator=' '):
"""Return a generator that renders old-style list template
name is name of key in template map.
values is list of strings or dicts.
plural is plural of name, if not simply name + 's'.
separator is used to join values as a string
expansion works like this, given name 'foo'.
if values is empty, expand 'no_foos'.
if 'foo' not in template map, return values as a string,
joined by 'separator'.
expand 'start_foos'.
for each value, expand 'foo'. if 'last_foo' in template
map, expand it instead of 'foo' for last key.
expand 'end_foos'.
"""
if not plural:
plural = name + 's'
if not values:
noname = 'no_' + plural
if context.preload(noname):
yield context.process(noname, mapping)
return
if not context.preload(name):
if isinstance(values[0], bytes):
yield separator.join(values)
else:
for v in values:
r = dict(v)
r.update(mapping)
yield r
return
startname = 'start_' + plural
if context.preload(startname):
yield context.process(startname, mapping)
def one(v, tag=name):
vmapping = {}
try:
vmapping.update(v)
# Python 2 raises ValueError if the type of v is wrong. Python
# 3 raises TypeError.
except (AttributeError, TypeError, ValueError):
try:
# Python 2 raises ValueError trying to destructure an e.g.
# bytes. Python 3 raises TypeError.
for a, b in v:
vmapping[a] = b
except (TypeError, ValueError):
vmapping[name] = v
vmapping = context.overlaymap(mapping, vmapping)
return context.process(tag, vmapping)
lastname = 'last_' + name
if context.preload(lastname):
last = values.pop()
else:
last = None
for v in values:
yield one(v)
if last is not None:
yield one(last, tag=lastname)
endname = 'end_' + plural
if context.preload(endname):
yield context.process(endname, mapping)
def flatten(context, mapping, thing):
"""Yield a single stream from a possibly nested set of iterators"""
if isinstance(thing, wrapped):
thing = thing.show(context, mapping)
if isinstance(thing, bytes):
yield thing
elif isinstance(thing, str):
# We can only hit this on Python 3, and it's here to guard
# against infinite recursion.
raise error.ProgrammingError('Mercurial IO including templates is done'
' with bytes, not strings, got %r' % thing)
elif thing is None:
pass
elif not util.safehasattr(thing, '__iter__'):
yield pycompat.bytestr(thing)
else:
for i in thing:
if isinstance(i, wrapped):
i = i.show(context, mapping)
if isinstance(i, bytes):
yield i
elif i is None:
pass
elif not util.safehasattr(i, '__iter__'):
yield pycompat.bytestr(i)
else:
for j in flatten(context, mapping, i):
yield j
def stringify(context, mapping, thing):
"""Turn values into bytes by converting into text and concatenating them"""
if isinstance(thing, bytes):
return thing # retain localstr to be round-tripped
return b''.join(flatten(context, mapping, thing))
def findsymbolicname(arg):
"""Find symbolic name for the given compiled expression; returns None
if nothing found reliably"""
while True:
func, data = arg
if func is runsymbol:
return data
elif func is runfilter:
arg = data[0]
else:
return None
def _nonempty(xiter):
try:
next(xiter)
return True
except StopIteration:
return False
def _unthunk(context, mapping, thing):
"""Evaluate a lazy byte string into value"""
if not isinstance(thing, types.GeneratorType):
return thing
return stringify(context, mapping, thing)
def evalrawexp(context, mapping, arg):
"""Evaluate given argument as a bare template object which may require
further processing (such as folding generator of strings)"""
func, data = arg
return func(context, mapping, data)
def evalwrapped(context, mapping, arg):
"""Evaluate given argument to wrapped object"""
thing = evalrawexp(context, mapping, arg)
return makewrapped(context, mapping, thing)
def makewrapped(context, mapping, thing):
"""Lift object to a wrapped type"""
if isinstance(thing, wrapped):
return thing
thing = _unthunk(context, mapping, thing)
if isinstance(thing, bytes):
return wrappedbytes(thing)
return wrappedvalue(thing)
def evalfuncarg(context, mapping, arg):
"""Evaluate given argument as value type"""
return unwrapvalue(context, mapping, evalrawexp(context, mapping, arg))
def unwrapvalue(context, mapping, thing):
"""Move the inner value object out of the wrapper"""
if isinstance(thing, wrapped):
return thing.tovalue(context, mapping)
# evalrawexp() may return string, generator of strings or arbitrary object
# such as date tuple, but filter does not want generator.
return _unthunk(context, mapping, thing)
def evalboolean(context, mapping, arg):
"""Evaluate given argument as boolean, but also takes boolean literals"""
func, data = arg
if func is runsymbol:
thing = func(context, mapping, data, default=None)
if thing is None:
# not a template keyword, takes as a boolean literal
thing = stringutil.parsebool(data)
else:
thing = func(context, mapping, data)
return makewrapped(context, mapping, thing).tobool(context, mapping)
def evaldate(context, mapping, arg, err=None):
"""Evaluate given argument as a date tuple or a date string; returns
a (unixtime, offset) tuple"""
thing = evalrawexp(context, mapping, arg)
return unwrapdate(context, mapping, thing, err)
def unwrapdate(context, mapping, thing, err=None):
if isinstance(thing, date):
return thing.tovalue(context, mapping)
# TODO: update hgweb to not return bare tuple; then just stringify 'thing'
thing = unwrapvalue(context, mapping, thing)
try:
return dateutil.parsedate(thing)
except AttributeError:
raise error.ParseError(err or _('not a date tuple nor a string'))
except error.ParseError:
if not err:
raise
raise error.ParseError(err)
def evalinteger(context, mapping, arg, err=None):
thing = evalrawexp(context, mapping, arg)
return unwrapinteger(context, mapping, thing, err)
def unwrapinteger(context, mapping, thing, err=None):
thing = unwrapvalue(context, mapping, thing)
try:
return int(thing)
except (TypeError, ValueError):
raise error.ParseError(err or _('not an integer'))
def evalstring(context, mapping, arg):
return stringify(context, mapping, evalrawexp(context, mapping, arg))
def evalstringliteral(context, mapping, arg):
"""Evaluate given argument as string template, but returns symbol name
if it is unknown"""
func, data = arg
if func is runsymbol:
thing = func(context, mapping, data, default=data)
else:
thing = func(context, mapping, data)
return stringify(context, mapping, thing)
_unwrapfuncbytype = {
None: unwrapvalue,
bytes: stringify,
date: unwrapdate,
int: unwrapinteger,
}
def unwrapastype(context, mapping, thing, typ):
"""Move the inner value object out of the wrapper and coerce its type"""
try:
f = _unwrapfuncbytype[typ]
except KeyError:
raise error.ProgrammingError('invalid type specified: %r' % typ)
return f(context, mapping, thing)
def runinteger(context, mapping, data):
return int(data)
def runstring(context, mapping, data):
return data
def _recursivesymbolblocker(key):
def showrecursion(context, mapping):
raise error.Abort(_("recursive reference '%s' in template") % key)
showrecursion._requires = () # mark as new-style templatekw
return showrecursion
def runsymbol(context, mapping, key, default=''):
v = context.symbol(mapping, key)
if v is None:
# put poison to cut recursion. we can't move this to parsing phase
# because "x = {x}" is allowed if "x" is a keyword. (issue4758)
safemapping = mapping.copy()
safemapping[key] = _recursivesymbolblocker(key)
try:
v = context.process(key, safemapping)
except TemplateNotFound:
v = default
if callable(v) and getattr(v, '_requires', None) is None:
# old templatekw: expand all keywords and resources
# (TODO: drop support for old-style functions. 'f._requires = ()'
# can be removed.)
props = {k: context._resources.lookup(mapping, k)
for k in context._resources.knownkeys()}
# pass context to _showcompatlist() through templatekw._showlist()
props['templ'] = context
props.update(mapping)
ui = props.get('ui')
if ui:
ui.deprecwarn("old-style template keyword '%s'" % key, '4.8')
return v(**pycompat.strkwargs(props))
if callable(v):
# new templatekw
try:
return v(context, mapping)
except ResourceUnavailable:
# unsupported keyword is mapped to empty just like unknown keyword
return None
return v
def runtemplate(context, mapping, template):
for arg in template:
yield evalrawexp(context, mapping, arg)
def runfilter(context, mapping, data):
arg, filt = data
thing = evalrawexp(context, mapping, arg)
intype = getattr(filt, '_intype', None)
try:
thing = unwrapastype(context, mapping, thing, intype)
return filt(thing)
except error.ParseError as e:
raise error.ParseError(bytes(e), hint=_formatfiltererror(arg, filt))
def _formatfiltererror(arg, filt):
fn = pycompat.sysbytes(filt.__name__)
sym = findsymbolicname(arg)
if not sym:
return _("incompatible use of template filter '%s'") % fn
return (_("template filter '%s' is not compatible with keyword '%s'")
% (fn, sym))
def _iteroverlaymaps(context, origmapping, newmappings):
"""Generate combined mappings from the original mapping and an iterable
of partial mappings to override the original"""
for i, nm in enumerate(newmappings):
lm = context.overlaymap(origmapping, nm)
lm['index'] = i
yield lm
def _applymap(context, mapping, d, darg, targ):
try:
diter = d.itermaps(context)
except error.ParseError as err:
sym = findsymbolicname(darg)
if not sym:
raise
hint = _("keyword '%s' does not support map operation") % sym
raise error.ParseError(bytes(err), hint=hint)
for lm in _iteroverlaymaps(context, mapping, diter):
yield evalrawexp(context, lm, targ)
def runmap(context, mapping, data):
darg, targ = data
d = evalwrapped(context, mapping, darg)
return mappedgenerator(_applymap, args=(mapping, d, darg, targ))
def runmember(context, mapping, data):
darg, memb = data
d = evalwrapped(context, mapping, darg)
if isinstance(d, mappable):
lm = context.overlaymap(mapping, d.tomap(context))
return runsymbol(context, lm, memb)
try:
return d.getmember(context, mapping, memb)
except error.ParseError as err:
sym = findsymbolicname(darg)
if not sym:
raise
hint = _("keyword '%s' does not support member operation") % sym
raise error.ParseError(bytes(err), hint=hint)
def runnegate(context, mapping, data):
data = evalinteger(context, mapping, data,
_('negation needs an integer argument'))
return -data
def runarithmetic(context, mapping, data):
func, left, right = data
left = evalinteger(context, mapping, left,
_('arithmetic only defined on integers'))
right = evalinteger(context, mapping, right,
_('arithmetic only defined on integers'))
try:
return func(left, right)
except ZeroDivisionError:
raise error.Abort(_('division by zero is not defined'))
def joinitems(itemiter, sep):
"""Join items with the separator; Returns generator of bytes"""
first = True
for x in itemiter:
if first:
first = False
elif sep:
yield sep
yield x