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annotate mercurial/destutil.py @ 26641:5c57d01fe64e

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destupdate: also include bookmark related logic For the same reason, we move the bookmark related update logic into the 'destupdate' function. This requires to extend the returns of the function to include the bookmark that needs to move (more or less) and the bookmark to activate at the end of the function. See function documentation for details on this returns.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Tue, 29 Sep 2015 01:03:26 -0700
parents ae5f7be2b4ab
children 634666c48b7d
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1 # destutil.py - Mercurial utility function for command destination
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2 #
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3 # Copyright Matt Mackall <mpm@selenic.com> and other
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from .i18n import _
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9 from . import (
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10 bookmarks,
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11 error,
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12 obsolete,
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13 )
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14
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15 def destupdate(repo, clean=False, check=False):
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16 """destination for bare update operation
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17
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18 return (rev, movemark, activemark)
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19
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20 - rev: the revision to update to,
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21 - movemark: node to move the active bookmark from
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22 (cf bookmark.calculate update),
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23 - activemark: a bookmark to activate at the end of the update.
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24 """
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25 node = None
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26 wc = repo[None]
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27 p1 = wc.p1()
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28 activemark = None
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29
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30 # we also move the active bookmark, if any
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31 node, movemark = bookmarks.calculateupdate(repo.ui, repo, None)
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32 if node is not None:
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33 activemark = node
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34
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35 if node is None:
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36 try:
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37 node = repo.branchtip(wc.branch())
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38 except error.RepoLookupError:
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39 if wc.branch() == 'default': # no default branch!
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40 node = repo.lookup('tip') # update to tip
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41 else:
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42 raise error.Abort(_("branch %s not found") % wc.branch())
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43
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44 if p1.obsolete() and not p1.children():
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45 # allow updating to successors
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46 successors = obsolete.successorssets(repo, p1.node())
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47
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48 # behavior of certain cases is as follows,
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49 #
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50 # divergent changesets: update to highest rev, similar to what
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51 # is currently done when there are more than one head
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52 # (i.e. 'tip')
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53 #
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54 # replaced changesets: same as divergent except we know there
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55 # is no conflict
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56 #
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57 # pruned changeset: no update is done; though, we could
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58 # consider updating to the first non-obsolete parent,
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59 # similar to what is current done for 'hg prune'
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60
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61 if successors:
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62 # flatten the list here handles both divergent (len > 1)
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63 # and the usual case (len = 1)
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64 successors = [n for sub in successors for n in sub]
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65
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66 # get the max revision for the given successors set,
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67 # i.e. the 'tip' of a set
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68 node = repo.revs('max(%ln)', successors).first()
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69 rev = repo[node].rev()
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70
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71 if not clean:
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72 # Check that the update is linear.
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73 #
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74 # Mercurial do not allow update-merge for non linear pattern
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75 # (that would be technically possible but was considered too confusing
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76 # for user a long time ago)
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77 #
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78 # See mercurial.merge.update for details
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79 if p1.rev() not in repo.changelog.ancestors([rev], inclusive=True):
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80 dirty = wc.dirty(missing=True)
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81 foreground = obsolete.foreground(repo, [p1.node()])
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82 if not repo[rev].node() in foreground:
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83 if dirty:
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84 msg = _("uncommitted changes")
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85 hint = _("commit and merge, or update --clean to"
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86 " discard changes")
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87 raise error.Abort(msg, hint=hint)
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88 elif not check: # destination is not a descendant.
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89 msg = _("not a linear update")
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90 hint = _("merge or update --check to force update")
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91 raise error.Abort(msg, hint=hint)
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92
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93 return rev, movemark, activemark