/usr/lib/python2.7/dist-packages/mercurial/destutil.py is in mercurial-common 3.7.3-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 | # destutil.py - Mercurial utility function for command destination
#
# Copyright Matt Mackall <mpm@selenic.com> and other
#
# 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 .i18n import _
from . import (
bookmarks,
error,
obsolete,
)
def _destupdatevalidate(repo, rev, clean, check):
"""validate that the destination comply to various rules
This exists as its own function to help wrapping from extensions."""
wc = repo[None]
p1 = wc.p1()
if not clean:
# Check that the update is linear.
#
# Mercurial do not allow update-merge for non linear pattern
# (that would be technically possible but was considered too confusing
# for user a long time ago)
#
# See mercurial.merge.update for details
if p1.rev() not in repo.changelog.ancestors([rev], inclusive=True):
dirty = wc.dirty(missing=True)
foreground = obsolete.foreground(repo, [p1.node()])
if not repo[rev].node() in foreground:
if dirty:
msg = _("uncommitted changes")
hint = _("commit and merge, or update --clean to"
" discard changes")
raise error.UpdateAbort(msg, hint=hint)
elif not check: # destination is not a descendant.
msg = _("not a linear update")
hint = _("merge or update --check to force update")
raise error.UpdateAbort(msg, hint=hint)
def _destupdateobs(repo, clean, check):
"""decide of an update destination from obsolescence markers"""
node = None
wc = repo[None]
p1 = wc.p1()
movemark = None
if p1.obsolete() and not p1.children():
# allow updating to successors
successors = obsolete.successorssets(repo, p1.node())
# behavior of certain cases is as follows,
#
# divergent changesets: update to highest rev, similar to what
# is currently done when there are more than one head
# (i.e. 'tip')
#
# replaced changesets: same as divergent except we know there
# is no conflict
#
# pruned changeset: no update is done; though, we could
# consider updating to the first non-obsolete parent,
# similar to what is current done for 'hg prune'
if successors:
# flatten the list here handles both divergent (len > 1)
# and the usual case (len = 1)
successors = [n for sub in successors for n in sub]
# get the max revision for the given successors set,
# i.e. the 'tip' of a set
node = repo.revs('max(%ln)', successors).first()
if bookmarks.isactivewdirparent(repo):
movemark = repo['.'].node()
return node, movemark, None
def _destupdatebook(repo, clean, check):
"""decide on an update destination from active bookmark"""
# we also move the active bookmark, if any
activemark = None
node, movemark = bookmarks.calculateupdate(repo.ui, repo, None)
if node is not None:
activemark = node
return node, movemark, activemark
def _destupdatebranch(repo, clean, check):
"""decide on an update destination from current branch"""
wc = repo[None]
movemark = node = None
try:
node = repo.branchtip(wc.branch())
if bookmarks.isactivewdirparent(repo):
movemark = repo['.'].node()
except error.RepoLookupError:
if wc.branch() == 'default': # no default branch!
node = repo.lookup('tip') # update to tip
else:
raise error.Abort(_("branch %s not found") % wc.branch())
return node, movemark, None
# order in which each step should be evalutated
# steps are run until one finds a destination
destupdatesteps = ['evolution', 'bookmark', 'branch']
# mapping to ease extension overriding steps.
destupdatestepmap = {'evolution': _destupdateobs,
'bookmark': _destupdatebook,
'branch': _destupdatebranch,
}
def destupdate(repo, clean=False, check=False):
"""destination for bare update operation
return (rev, movemark, activemark)
- rev: the revision to update to,
- movemark: node to move the active bookmark from
(cf bookmark.calculate update),
- activemark: a bookmark to activate at the end of the update.
"""
node = movemark = activemark = None
for step in destupdatesteps:
node, movemark, activemark = destupdatestepmap[step](repo, clean, check)
if node is not None:
break
rev = repo[node].rev()
_destupdatevalidate(repo, rev, clean, check)
return rev, movemark, activemark
def _destmergebook(repo):
"""find merge destination in the active bookmark case"""
node = None
bmheads = repo.bookmarkheads(repo._activebookmark)
curhead = repo[repo._activebookmark].node()
if len(bmheads) == 2:
if curhead == bmheads[0]:
node = bmheads[1]
else:
node = bmheads[0]
elif len(bmheads) > 2:
raise error.Abort(_("multiple matching bookmarks to merge - "
"please merge with an explicit rev or bookmark"),
hint=_("run 'hg heads' to see all heads"))
elif len(bmheads) <= 1:
raise error.Abort(_("no matching bookmark to merge - "
"please merge with an explicit rev or bookmark"),
hint=_("run 'hg heads' to see all heads"))
assert node is not None
return node
def _destmergebranch(repo):
"""find merge destination based on branch heads"""
node = None
branch = repo[None].branch()
bheads = repo.branchheads(branch)
nbhs = [bh for bh in bheads if not repo[bh].bookmarks()]
if len(nbhs) > 2:
raise error.Abort(_("branch '%s' has %d heads - "
"please merge with an explicit rev")
% (branch, len(bheads)),
hint=_("run 'hg heads .' to see heads"))
parent = repo.dirstate.p1()
if len(nbhs) <= 1:
if len(bheads) > 1:
raise error.Abort(_("heads are bookmarked - "
"please merge with an explicit rev"),
hint=_("run 'hg heads' to see all heads"))
if len(repo.heads()) > 1:
raise error.Abort(_("branch '%s' has one head - "
"please merge with an explicit rev")
% branch,
hint=_("run 'hg heads' to see all heads"))
msg, hint = _('nothing to merge'), None
if parent != repo.lookup(branch):
hint = _("use 'hg update' instead")
raise error.Abort(msg, hint=hint)
if parent not in bheads:
raise error.Abort(_('working directory not at a head revision'),
hint=_("use 'hg update' or merge with an "
"explicit revision"))
if parent == nbhs[0]:
node = nbhs[-1]
else:
node = nbhs[0]
assert node is not None
return node
def destmerge(repo):
if repo._activebookmark:
node = _destmergebook(repo)
else:
node = _destmergebranch(repo)
return repo[node].rev()
histeditdefaultrevset = 'reverse(only(.) and not public() and not ::merge())'
def desthistedit(ui, repo):
"""Default base revision to edit for `hg histedit`."""
# Avoid cycle: scmutil -> revset -> destutil
from . import scmutil
default = ui.config('histedit', 'defaultrev', histeditdefaultrevset)
if default:
revs = scmutil.revrange(repo, [default])
if revs:
# The revset supplied by the user may not be in ascending order nor
# take the first revision. So do this manually.
revs.sort()
return revs.first()
return None
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