author | Pierre-Yves David <pierre-yves.david@fb.com> |
Tue, 29 Sep 2015 00:18:49 -0700 | |
changeset 26629 | ae5f7be2b4ab |
parent 26628 | 45b86dbabbda |
child 26641 | 5c57d01fe64e |
permissions | -rw-r--r-- |
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# destutil.py - Mercurial utility function for command destination |
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# |
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# Copyright Matt Mackall <mpm@selenic.com> and other |
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# |
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# This software may be used and distributed according to the terms of the |
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# GNU General Public License version 2 or any later version. |
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from .i18n import _ |
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from . import ( |
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error, |
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obsolete, |
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) |
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def destupdate(repo, clean=False, check=False): |
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"""destination for bare update operation |
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""" |
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# Here is where we should consider bookmarks, divergent bookmarks, and tip |
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# of current branch; but currently we are only checking the branch tips. |
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node = None |
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wc = repo[None] |
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p1 = wc.p1() |
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try: |
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node = repo.branchtip(wc.branch()) |
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except error.RepoLookupError: |
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if wc.branch() == 'default': # no default branch! |
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node = repo.lookup('tip') # update to tip |
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else: |
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raise error.Abort(_("branch %s not found") % wc.branch()) |
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if p1.obsolete() and not p1.children(): |
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# allow updating to successors |
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successors = obsolete.successorssets(repo, p1.node()) |
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# behavior of certain cases is as follows, |
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# |
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# divergent changesets: update to highest rev, similar to what |
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# is currently done when there are more than one head |
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# (i.e. 'tip') |
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# |
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# replaced changesets: same as divergent except we know there |
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# is no conflict |
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# |
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# pruned changeset: no update is done; though, we could |
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# consider updating to the first non-obsolete parent, |
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# similar to what is current done for 'hg prune' |
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if successors: |
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# flatten the list here handles both divergent (len > 1) |
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# and the usual case (len = 1) |
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successors = [n for sub in successors for n in sub] |
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# get the max revision for the given successors set, |
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# i.e. the 'tip' of a set |
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node = repo.revs('max(%ln)', successors).first() |
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rev = repo[node].rev() |
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if not clean: |
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# Check that the update is linear. |
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# |
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# Mercurial do not allow update-merge for non linear pattern |
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# (that would be technically possible but was considered too confusing |
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# for user a long time ago) |
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# |
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# See mercurial.merge.update for details |
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if p1.rev() not in repo.changelog.ancestors([rev], inclusive=True): |
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dirty = wc.dirty(missing=True) |
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foreground = obsolete.foreground(repo, [p1.node()]) |
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if not repo[rev].node() in foreground: |
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if dirty: |
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msg = _("uncommitted changes") |
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hint = _("commit and merge, or update --clean to" |
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" discard changes") |
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raise error.Abort(msg, hint=hint) |
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elif not check: # destination is not a descendant. |
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msg = _("not a linear update") |
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hint = _("merge or update --check to force update") |
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raise error.Abort(msg, hint=hint) |
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return rev |