[PATCH] merge: remove files with extra actions from merge action list
Martin von Zweigbergk
martinvonz at google.com
Wed Aug 24 01:09:07 EDT 2016
Not pretty, but I don't have a better solution. Queued, thanks.
On Tue, Aug 23, 2016 at 6:01 PM, Siddharth Agarwal <sid0 at fb.com> wrote:
> # HG changeset patch
> # User Siddharth Agarwal <sid0 at fb.com>
> # Date 1472000333 25200
> # Tue Aug 23 17:58:53 2016 -0700
> # Node ID 6cae957b9be33ddd8e9d1246626a8908456b1aef
> # Parent b1809f5d7630a3fff0fa715bbd30dba0f07672a8
> merge: remove files with extra actions from merge action list
>
> See the comment for a detailed explanation why.
>
> Even though this is a bug, I've sent it to 'default' rather than 'stable'
> because it isn't triggered in any code paths in stock Mercurial, just with the
> merge driver included. For the same reason I haven't included any tests here --
> the merge driver is getting a new test.
>
> diff --git a/mercurial/merge.py b/mercurial/merge.py
> --- a/mercurial/merge.py
> +++ b/mercurial/merge.py
> @@ -1286,8 +1286,29 @@ def applyupdates(repo, actions, wctx, mc
> removed += msremoved
>
> extraactions = ms.actions()
> - for k, acts in extraactions.iteritems():
> - actions[k].extend(acts)
> + if extraactions:
> + mfiles = set(a[0] for a in actions['m'])
> + for k, acts in extraactions.iteritems():
> + actions[k].extend(acts)
> + # Remove these files from actions['m'] as well. This is important
> + # because in recordupdates, files in actions['m'] are processed
> + # after files in other actions, and the merge driver might add
> + # files to those actions via extraactions above. This can lead to a
> + # file being recorded twice, with poor results. This is especially
> + # problematic for actions['r'] (currently only possible with the
> + # merge driver in the initial merge process; interrupted merges
> + # don't go through this flow).
> + #
> + # The real fix here is to have indexes by both file and action so
> + # that when the action for a file is changed it is automatically
> + # reflected in the other action lists. But that involves a more
> + # complex data structure, so this will do for now.
> + #
> + # We don't need to do the same operation for 'dc' and 'cd' because
> + # those lists aren't consulted again.
> + mfiles.difference_update(a[0] for a in acts)
> +
> + actions['m'] = [a for a in actions['m'] if a[0] in mfiles]
>
> progress(_updating, None, total=numupdates, unit=_files)
>
> _______________________________________________
> Mercurial-devel mailing list
> Mercurial-devel at mercurial-scm.org
> https://www.mercurial-scm.org/mailman/listinfo/mercurial-devel
More information about the Mercurial-devel
mailing list