Subject: Re: [PATCH] mergetool: reorder vim/gvim buffers in three-way diffs

From: Michael J Gruber <[email-masked]>
Date: Wed, 10 Feb 2016 15:40:31 +0100

Junio C Hamano venit, vidit, dixit 09.02.2016 23:25:
> Junio C Hamano <[email-masked]> writes:
> 
>> Dickson Wong <[email-masked]> writes:
>>
>>> When invoking default (g)vimdiff three-way merge, the merged file is
>>> loaded as the first buffer but moved to the bottom as the fourth window.
>>> This causes a disconnect between vim commands that operate on window
>>> positions (e.g. CTRL-W_w) and those that operate on buffer index (e.g.
>>> do/dp).
>>>
>>> This change reorders the buffers to have the same index as windows while
>>> keeping the cursor default to the merged result as the bottom window.
>>>
>>> Signed-off-by: Dickson Wong <[email-masked]>
>>> ---
>>
>> David, I unfortunately do not use 'mergetools' myself and certainly
>> not vimdiff.
>>
>> Opinions?
> 
> Second call for help.  Any comments on this from anybody other than
> the author that I missed to support this change?
> 

OK, applied it (on top of next), looks sane and improves the situation
for the majority of people who read left to right, then top down and
assign buffers 1 2 3 4 "mentally" to local base remote merge windows
based on that. Their expectation is met now. Thanks!

(Also, the other vim variants don't need a corresponding change.)

Michael

>>
>>>  mergetools/vimdiff | 4 ++--
>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/mergetools/vimdiff b/mergetools/vimdiff
>>> index 1ddfbfc..74ea6d5 100644
>>> --- a/mergetools/vimdiff
>>> +++ b/mergetools/vimdiff
>>> @@ -2,22 +2,22 @@ diff_cmd () {
>>>  	"$merge_tool_path" -R -f -d \
>>>  		-c 'wincmd l' -c 'cd $GIT_PREFIX' "$LOCAL" "$REMOTE"
>>>  }
>>>  
>>>  merge_cmd () {
>>>  	touch "$BACKUP"
>>>  	case "$1" in
>>>  	gvimdiff|vimdiff)
>>>  		if $base_present
>>>  		then
>>> -			"$merge_tool_path" -f -d -c 'wincmd J' \
>>> -				"$MERGED" "$LOCAL" "$BASE" "$REMOTE"
>>> +			"$merge_tool_path" -f -d -c '4wincmd w | wincmd J' \
>>> +				"$LOCAL" "$BASE" "$REMOTE" "$MERGED"
>>>  		else
>>>  			"$merge_tool_path" -f -d -c 'wincmd l' \
>>>  				"$LOCAL" "$MERGED" "$REMOTE"
>>>  		fi
>>>  		;;
>>>  	gvimdiff2|vimdiff2)
>>>  		"$merge_tool_path" -f -d -c 'wincmd l' \
>>>  			"$LOCAL" "$MERGED" "$REMOTE"
>>>  		;;
>>>  	gvimdiff3|vimdiff3)