Patchwork [1,of,2,V3] destupdate: also include bookmark related logic

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 1443513806 25200
#      Tue Sep 29 01:03:26 2015 -0700
# Node ID 88139d0257c74a16335585380e0f873efcdffbed
# Parent  ae5f7be2b4ab35b844b792b5fc48f164a3656718
# EXP-Topic defaultdest
# Available At http://hg.netv6.net/marmoute-wip/mercurial/
#              hg pull http://hg.netv6.net/marmoute-wip/mercurial/ -r 88139d0257c7
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.

On Tue, Oct 13, 2015 at 11:52:14AM -0700, Pierre-Yves David wrote:
> # HG changeset patch
> # User Pierre-Yves David <pierre-yves.david@fb.com>
> # Date 1443513806 25200
> #      Tue Sep 29 01:03:26 2015 -0700
> # Node ID 88139d0257c74a16335585380e0f873efcdffbed
> # Parent  ae5f7be2b4ab35b844b792b5fc48f164a3656718
> # EXP-Topic defaultdest
> # Available At http://hg.netv6.net/marmoute-wip/mercurial/
> #              hg pull http://hg.netv6.net/marmoute-wip/mercurial/ -r 88139d0257c7
> destupdate: also include bookmark related logic

queued these, thanks for working with me on the documentation

>
> 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.
>
> diff --git a/mercurial/commands.py b/mercurial/commands.py
> --- a/mercurial/commands.py
> +++ b/mercurial/commands.py
> @@ -6565,10 +6565,11 @@ def update(ui, repo, node=None, rev=None
>
>      See :hg:`help dates` for a list of formats valid for -d/--date.
>
>      Returns 0 on success, 1 if there are unresolved files.
>      """
> +    movemarkfrom = None
>      if rev and node:
>          raise error.Abort(_("please specify just one revision"))
>
>      if rev is None or rev == '':
>          rev = node
> @@ -6580,13 +6581,10 @@ def update(ui, repo, node=None, rev=None
>          if date:
>              if rev is not None:
>                  raise error.Abort(_("you can't specify a revision and a date"))
>              rev = cmdutil.finddate(ui, repo, date)
>
> -        # with no argument, we also move the active bookmark, if any
> -        rev, movemarkfrom = bookmarks.calculateupdate(ui, repo, rev)
> -
>          # if we defined a bookmark, we have to remember the original name
>          brev = rev
>          rev = scmutil.revsingle(repo, rev, rev).rev()
>
>          if check and clean:
> @@ -6594,11 +6592,12 @@ def update(ui, repo, node=None, rev=None
>                               )
>
>          if check:
>              cmdutil.bailifchanged(repo, merge=False)
>          if rev is None:
> -            rev = destutil.destupdate(repo, clean=clean, check=check)
> +            updata =  destutil.destupdate(repo, clean=clean, check=check)
> +            rev, movemarkfrom, brev = updata
>
>          repo.ui.setconfig('ui', 'forcemerge', tool, 'update')
>
>          if clean:
>              ret = hg.clean(repo, rev)
> diff --git a/mercurial/destutil.py b/mercurial/destutil.py
> --- a/mercurial/destutil.py
> +++ b/mercurial/destutil.py
> @@ -5,29 +5,43 @@
>  # This software may be used and distributed according to the terms of the
>  # GNU General Public License version 2 or any later version.
>
>  from .i18n import _
>  from . import (
> +    bookmarks,
>      error,
>      obsolete,
>  )
>
>  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.
>      """
> -    # Here is where we should consider bookmarks, divergent bookmarks, and tip
> -    # of current branch; but currently we are only checking the branch tips.
>      node = None
>      wc = repo[None]
>      p1 = wc.p1()
> -    try:
> -        node = repo.branchtip(wc.branch())
> -    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())
> +    activemark = None
> +
> +    # we also move the active bookmark, if any
> +    node, movemark = bookmarks.calculateupdate(repo.ui, repo, None)
> +    if node is not None:
> +        activemark = node
> +
> +    if node is None:
> +        try:
> +            node = repo.branchtip(wc.branch())
> +        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())
>
>      if p1.obsolete() and not p1.children():
>          # allow updating to successors
>          successors = obsolete.successorssets(repo, p1.node())
>
> @@ -74,6 +88,6 @@ def destupdate(repo, clean=False, check=
>                  elif not check:  # destination is not a descendant.
>                      msg = _("not a linear update")
>                      hint = _("merge or update --check to force update")
>                      raise error.Abort(msg, hint=hint)
>
> -    return rev
> +    return rev, movemark, activemark
> diff --git a/mercurial/merge.py b/mercurial/merge.py
> --- a/mercurial/merge.py
> +++ b/mercurial/merge.py
> @@ -1025,11 +1025,12 @@ def update(repo, node, branchmerge, forc
>          pas = [None]
>          if ancestor is not None:
>              pas = [repo[ancestor]]
>
>          if node is None:
> -            node = repo[destutil.destupdate(repo)].node()
> +            rev, _mark, _act = destutil.destupdate(repo)
> +            node = repo[rev].node()
>
>          overwrite = force and not branchmerge
>
>          p2 = repo[node]
>          if pas[0] is None:
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