subrepo: handle unexpected file types from git gracefully
This was flagged by pytype because `tar.extractfile(...)` can return None if the
entry is not a file or symlink. I don't think that git supports other types,
but better safe than sorry.
Differential Revision: https://phab.mercurial-scm.org/D10179
# rewriteutil.py - utility functions for rewriting changesets
#
# Copyright 2017 Octobus <contact@octobus.net>
#
# 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 re
from .i18n import _
from .node import (
hex,
nullrev,
)
from . import (
error,
obsolete,
obsutil,
revset,
scmutil,
)
NODE_RE = re.compile(br'\b[0-9a-f]{6,64}\b')
def precheck(repo, revs, action=b'rewrite'):
"""check if revs can be rewritten
action is used to control the error message.
Make sure this function is called after taking the lock.
"""
if nullrev in revs:
msg = _(b"cannot %s null changeset") % action
hint = _(b"no changeset checked out")
raise error.InputError(msg, hint=hint)
if len(repo[None].parents()) > 1:
raise error.StateError(_(b"cannot %s while merging") % action)
publicrevs = repo.revs(b'%ld and public()', revs)
if publicrevs:
msg = _(b"cannot %s public changesets") % action
hint = _(b"see 'hg help phases' for details")
raise error.InputError(msg, hint=hint)
newunstable = disallowednewunstable(repo, revs)
if newunstable:
raise error.InputError(_(b"cannot %s changeset with children") % action)
def disallowednewunstable(repo, revs):
"""Checks whether editing the revs will create new unstable changesets and
are we allowed to create them.
To allow new unstable changesets, set the config:
`experimental.evolution.allowunstable=True`
"""
allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt)
if allowunstable:
return revset.baseset()
return repo.revs(b"(%ld::) - %ld", revs, revs)
def skip_empty_successor(ui, command):
empty_successor = ui.config(b'rewrite', b'empty-successor')
if empty_successor == b'skip':
return True
elif empty_successor == b'keep':
return False
else:
raise error.ConfigError(
_(
b"%s doesn't know how to handle config "
b"rewrite.empty-successor=%s (only 'skip' and 'keep' are "
b"supported)"
)
% (command, empty_successor)
)
def update_hash_refs(repo, commitmsg, pending=None):
"""Replace all obsolete commit hashes in the message with the current hash.
If the obsolete commit was split or is divergent, the hash is not replaced
as there's no way to know which successor to choose.
For commands that update a series of commits in the current transaction, the
new obsolete markers can be considered by setting ``pending`` to a mapping
of ``pending[oldnode] = [successor_node1, successor_node2,..]``.
"""
if not pending:
pending = {}
cache = {}
hashes = re.findall(NODE_RE, commitmsg)
unfi = repo.unfiltered()
for h in hashes:
fullnode = scmutil.resolvehexnodeidprefix(unfi, h)
if fullnode is None:
continue
ctx = unfi[fullnode]
if not ctx.obsolete():
successors = pending.get(fullnode)
if successors is None:
continue
# obsutil.successorssets() returns a list of list of nodes
successors = [successors]
else:
successors = obsutil.successorssets(repo, ctx.node(), cache=cache)
# We can't make any assumptions about how to update the hash if the
# cset in question was split or diverged.
if len(successors) == 1 and len(successors[0]) == 1:
successor = successors[0][0]
if successor is not None:
newhash = hex(successor)
commitmsg = commitmsg.replace(h, newhash[: len(h)])
else:
repo.ui.note(
_(
b'The stale commit message reference to %s could '
b'not be updated\n(The referenced commit was dropped)\n'
)
% h
)
else:
repo.ui.note(
_(
b'The stale commit message reference to %s could '
b'not be updated\n'
)
% h
)
return commitmsg