comparison mercurial/commands.py @ 26303:c99b4d6efdd8

merge: move default destination computation in a revset

This is another step toward having "default" destination more clear and unified.

26302:5ba3358ebc7f

        node = opts.get('rev')

    if node:
        node = scmutil.revsingle(repo, node).node()

    if not node and repo._activebookmark:
        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 util.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 util.Abort(_("no matching bookmark to merge - "
                "please merge with an explicit rev or bookmark"),
                hint=_("run 'hg heads' to see all heads"))

    elif not node:
        branch = repo[None].branch()
        bheads = repo.branchheads(branch)
        nbhs = [bh for bh in bheads if not repo[bh].bookmarks()]

        if len(nbhs) > 2:
            raise util.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 util.Abort(_("heads are bookmarked - "
                                   "please merge with an explicit rev"),
                                 hint=_("run 'hg heads' to see all heads"))
            if len(repo.heads()) > 1:
                raise util.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 util.Abort(msg, hint=hint)

        if parent not in bheads:
            raise util.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]

    if opts.get('preview'):
        # find nodes that are ancestors of p2 but not of p1
        p1 = repo.lookup('.')
        p2 = repo.lookup(node)

26303:c99b4d6efdd8

        node = opts.get('rev')

    if node:
        node = scmutil.revsingle(repo, node).node()

    if not node:
        node = scmutil.revsingle(repo, '_mergedefaultdest()').node()

    if opts.get('preview'):
        # find nodes that are ancestors of p2 but not of p1
        p1 = repo.lookup('.')
        p2 = repo.lookup(node)