hgweb: show as same parents as "hg parents -r REV FILE" in pages for file
Before this patch, "parents" in pages for file doesn't show as same
parents as "hg parents -r REV FILE", when the specified file is not
modified in the specified revision.
For example, it is assumed that revision A, B and D change file "f".
changelog (A) ---> (B) ---> (C) ---> (D)
filelog "f" (x) ---> (y) ------------> (z)
"/file/D/f" invokes "webutil.parents()" with filectx(z) gotten from
changectx(D), and it returns changectx(B). This is as same result as
"hg parents -r D f".
In the other hand, "/file/C/f" invokes "webutil.parents()" with
filectx(y') gotten from changectx(C), and it returns changectx(A),
because filectx(y') is linked to changectx(B), and works like
filectx(y) in some cases.
In this case, revision B is hidden from users browsing file "f" in
revision C.
This patch shows as same parents as "hg parents -r REV FILE" in pages
for file, by making "webutil.parents()" return:
- "linkrev()"-ed revision only, if:
- specified context instance is "filectx" (because
"webutil.parents()" is invoked with changectx, too), and
- (1) the revision from which filectx is gotten and (2) the one to
which filectx is linked are different from each other
- revision gotten from "ctx.parents()", otherwise
# error.py - Mercurial exceptions
#
# Copyright 2005-2008 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.
"""Mercurial exceptions.
This allows us to catch exceptions at higher levels without forcing
imports.
"""
# Do not import anything here, please
class RevlogError(Exception):
pass
class LookupError(RevlogError, KeyError):
def __init__(self, name, index, message):
self.name = name
if isinstance(name, str) and len(name) == 20:
from node import short
name = short(name)
RevlogError.__init__(self, '%s@%s: %s' % (index, name, message))
def __str__(self):
return RevlogError.__str__(self)
class ManifestLookupError(LookupError):
pass
class CommandError(Exception):
"""Exception raised on errors in parsing the command line."""
class InterventionRequired(Exception):
"""Exception raised when a command requires human intervention."""
class Abort(Exception):
"""Raised if a command needs to print an error and exit."""
def __init__(self, *args, **kw):
Exception.__init__(self, *args)
self.hint = kw.get('hint')
class ConfigError(Abort):
'Exception raised when parsing config files'
class OutOfBandError(Exception):
'Exception raised when a remote repo reports failure'
class ParseError(Exception):
'Exception raised when parsing config files (msg[, pos])'
class RepoError(Exception):
def __init__(self, *args, **kw):
Exception.__init__(self, *args)
self.hint = kw.get('hint')
class RepoLookupError(RepoError):
pass
class CapabilityError(RepoError):
pass
class RequirementError(RepoError):
"""Exception raised if .hg/requires has an unknown entry."""
pass
class LockError(IOError):
def __init__(self, errno, strerror, filename, desc):
IOError.__init__(self, errno, strerror, filename)
self.desc = desc
class LockHeld(LockError):
def __init__(self, errno, filename, desc, locker):
LockError.__init__(self, errno, 'Lock held', filename, desc)
self.locker = locker
class LockUnavailable(LockError):
pass
class ResponseError(Exception):
"""Raised to print an error with part of output and exit."""
class UnknownCommand(Exception):
"""Exception raised if command is not in the command table."""
class AmbiguousCommand(Exception):
"""Exception raised if command shortcut matches more than one command."""
# derived from KeyboardInterrupt to simplify some breakout code
class SignalInterrupt(KeyboardInterrupt):
"""Exception raised on SIGTERM and SIGHUP."""
class SignatureError(Exception):
pass