bundle2: obtain repr() of exception in a python3-safe way
This was exposed by other problems in bundle generation, but I'm not
sure how to test it for now.
# registrar.py - utilities to register function for specific purpose
#
# Copyright FUJIWARA Katsunori <foozy@lares.dti.ne.jp> and others
#
# 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
from . import (
configitems,
error,
pycompat,
util,
)
# unlike the other registered items, config options are neither functions or
# classes. Registering the option is just small function call.
#
# We still add the official API to the registrar module for consistency with
# the other items extensions want might to register.
configitem = configitems.getitemregister
class _funcregistrarbase(object):
"""Base of decorator to register a function for specific purpose
This decorator stores decorated functions into own dict 'table'.
The least derived class can be defined by overriding 'formatdoc',
for example::
class keyword(_funcregistrarbase):
_docformat = ":%s: %s"
This should be used as below:
keyword = registrar.keyword()
@keyword('bar')
def barfunc(*args, **kwargs):
'''Explanation of bar keyword ....
'''
pass
In this case:
- 'barfunc' is stored as 'bar' in '_table' of an instance 'keyword' above
- 'barfunc.__doc__' becomes ":bar: Explanation of bar keyword"
"""
def __init__(self, table=None):
if table is None:
self._table = {}
else:
self._table = table
def __call__(self, decl, *args, **kwargs):
return lambda func: self._doregister(func, decl, *args, **kwargs)
def _doregister(self, func, decl, *args, **kwargs):
name = self._getname(decl)
if name in self._table:
msg = 'duplicate registration for name: "%s"' % name
raise error.ProgrammingError(msg)
if func.__doc__ and not util.safehasattr(func, '_origdoc'):
doc = pycompat.sysbytes(func.__doc__).strip()
func._origdoc = doc
func.__doc__ = pycompat.sysstr(self._formatdoc(decl, doc))
self._table[name] = func
self._extrasetup(name, func, *args, **kwargs)
return func
def _parsefuncdecl(self, decl):
"""Parse function declaration and return the name of function in it
"""
i = decl.find('(')
if i >= 0:
return decl[:i]
else:
return decl
def _getname(self, decl):
"""Return the name of the registered function from decl
Derived class should override this, if it allows more
descriptive 'decl' string than just a name.
"""
return decl
_docformat = None
def _formatdoc(self, decl, doc):
"""Return formatted document of the registered function for help
'doc' is '__doc__.strip()' of the registered function.
"""
return self._docformat % (decl, doc)
def _extrasetup(self, name, func):
"""Execute exra setup for registered function, if needed
"""
pass
class command(_funcregistrarbase):
"""Decorator to register a command function to table
This class receives a command table as its argument. The table should
be a dict.
The created object can be used as a decorator for adding commands to
that command table. This accepts multiple arguments to define a command.
The first argument is the command name.
The options argument is an iterable of tuples defining command arguments.
See ``mercurial.fancyopts.fancyopts()`` for the format of each tuple.
The synopsis argument defines a short, one line summary of how to use the
command. This shows up in the help output.
The norepo argument defines whether the command does not require a
local repository. Most commands operate against a repository, thus the
default is False.
The optionalrepo argument defines whether the command optionally requires
a local repository.
The inferrepo argument defines whether to try to find a repository from the
command line arguments. If True, arguments will be examined for potential
repository locations. See ``findrepo()``. If a repository is found, it
will be used.
"""
def _doregister(self, func, name, options=(), synopsis=None,
norepo=False, optionalrepo=False, inferrepo=False):
func.norepo = norepo
func.optionalrepo = optionalrepo
func.inferrepo = inferrepo
if synopsis:
self._table[name] = func, list(options), synopsis
else:
self._table[name] = func, list(options)
return func
class revsetpredicate(_funcregistrarbase):
"""Decorator to register revset predicate
Usage::
revsetpredicate = registrar.revsetpredicate()
@revsetpredicate('mypredicate(arg1, arg2[, arg3])')
def mypredicatefunc(repo, subset, x):
'''Explanation of this revset predicate ....
'''
pass
The first string argument is used also in online help.
Optional argument 'safe' indicates whether a predicate is safe for
DoS attack (False by default).
Optional argument 'takeorder' indicates whether a predicate function
takes ordering policy as the last argument.
'revsetpredicate' instance in example above can be used to
decorate multiple functions.
Decorated functions are registered automatically at loading
extension, if an instance named as 'revsetpredicate' is used for
decorating in extension.
Otherwise, explicit 'revset.loadpredicate()' is needed.
"""
_getname = _funcregistrarbase._parsefuncdecl
_docformat = "``%s``\n %s"
def _extrasetup(self, name, func, safe=False, takeorder=False):
func._safe = safe
func._takeorder = takeorder
class filesetpredicate(_funcregistrarbase):
"""Decorator to register fileset predicate
Usage::
filesetpredicate = registrar.filesetpredicate()
@filesetpredicate('mypredicate()')
def mypredicatefunc(mctx, x):
'''Explanation of this fileset predicate ....
'''
pass
The first string argument is used also in online help.
Optional argument 'callstatus' indicates whether a predicate
implies 'matchctx.status()' at runtime or not (False, by
default).
Optional argument 'callexisting' indicates whether a predicate
implies 'matchctx.existing()' at runtime or not (False, by
default).
'filesetpredicate' instance in example above can be used to
decorate multiple functions.
Decorated functions are registered automatically at loading
extension, if an instance named as 'filesetpredicate' is used for
decorating in extension.
Otherwise, explicit 'fileset.loadpredicate()' is needed.
"""
_getname = _funcregistrarbase._parsefuncdecl
_docformat = "``%s``\n %s"
def _extrasetup(self, name, func, callstatus=False, callexisting=False):
func._callstatus = callstatus
func._callexisting = callexisting
class _templateregistrarbase(_funcregistrarbase):
"""Base of decorator to register functions as template specific one
"""
_docformat = ":%s: %s"
class templatekeyword(_templateregistrarbase):
"""Decorator to register template keyword
Usage::
templatekeyword = registrar.templatekeyword()
@templatekeyword('mykeyword')
def mykeywordfunc(repo, ctx, templ, cache, revcache, **args):
'''Explanation of this template keyword ....
'''
pass
The first string argument is used also in online help.
'templatekeyword' instance in example above can be used to
decorate multiple functions.
Decorated functions are registered automatically at loading
extension, if an instance named as 'templatekeyword' is used for
decorating in extension.
Otherwise, explicit 'templatekw.loadkeyword()' is needed.
"""
class templatefilter(_templateregistrarbase):
"""Decorator to register template filer
Usage::
templatefilter = registrar.templatefilter()
@templatefilter('myfilter')
def myfilterfunc(text):
'''Explanation of this template filter ....
'''
pass
The first string argument is used also in online help.
'templatefilter' instance in example above can be used to
decorate multiple functions.
Decorated functions are registered automatically at loading
extension, if an instance named as 'templatefilter' is used for
decorating in extension.
Otherwise, explicit 'templatefilters.loadkeyword()' is needed.
"""
class templatefunc(_templateregistrarbase):
"""Decorator to register template function
Usage::
templatefunc = registrar.templatefunc()
@templatefunc('myfunc(arg1, arg2[, arg3])', argspec='arg1 arg2 arg3')
def myfuncfunc(context, mapping, args):
'''Explanation of this template function ....
'''
pass
The first string argument is used also in online help.
If optional 'argspec' is defined, the function will receive 'args' as
a dict of named arguments. Otherwise 'args' is a list of positional
arguments.
'templatefunc' instance in example above can be used to
decorate multiple functions.
Decorated functions are registered automatically at loading
extension, if an instance named as 'templatefunc' is used for
decorating in extension.
Otherwise, explicit 'templater.loadfunction()' is needed.
"""
_getname = _funcregistrarbase._parsefuncdecl
def _extrasetup(self, name, func, argspec=None):
func._argspec = argspec