Re: [PATCH] git-gui: stop using deprecated merge syntax

[Pat Thoyts <patthoyts@users.sourceforge.net>]

Stefan Beller <sbeller@google.com> writes:

>On Sun, Sep 25, 2016 at 11:39 AM, Junio C Hamano <gitster@pobox.com> wrote:
>> Johannes Sixt <j6t@kdbg.org> writes:
>>
>>> Am 24.09.2016 um 13:30 schrieb René Scharfe:
>>>> Starting with v2.5.0 git merge can handle FETCH_HEAD internally and
>>>> warns when it's called like 'git merge <message> HEAD <commit>' because
>>>> that syntax is deprecated.  Use this feature in git-gui and get rid of
>>>> that warning.
>>>>
>>>> Signed-off-by: Rene Scharfe <l.s.r@web.de>
>>>> ---
>>>> Tested only _very_ lightly!
>>>>
>>>>  git-gui/lib/merge.tcl | 7 +------
>>>>  1 file changed, 1 insertion(+), 6 deletions(-)
>>>>
>>>> diff --git a/git-gui/lib/merge.tcl b/git-gui/lib/merge.tcl
>>>> index 460d32f..5ab6f8f 100644
>>>> --- a/git-gui/lib/merge.tcl
>>>> +++ b/git-gui/lib/merge.tcl
>>>> @@ -112,12 +112,7 @@ method _start {} {
>>>>      close $fh
>>>>      set _last_merged_branch $branch
>>>>
>>>> -    set cmd [list git]
>>>> -    lappend cmd merge
>>>> -    lappend cmd --strategy=recursive
>>>> -    lappend cmd [git fmt-merge-msg <[gitdir FETCH_HEAD]]
>>>> -    lappend cmd HEAD
>>>> -    lappend cmd $name
>>>> +    set cmd [list git merge --strategy=recursive FETCH_HEAD]
>>>>
>>>>      ui_status [mc "Merging %s and %s..." $current_branch $stitle]
>>>>      set cons [console::new [mc "Merge"] "merge $stitle"]
>>>>
>>>
>>> Much better than my version. I had left fmt-merge-msg and added
>>> --no-log to treat merge.log config suitably. But this works too, and
>>> is much more obvious.
>>>
>>> Tested-by: Johannes Sixt <j6t@kdbg.org>
>
>Reviewed-by: Stefan Beller <sbeller@google.com>
>

The only problem I see here is that generally git-gui tries to continue
to work with older versions of git as well. So adding a guard using the
git-version procedure should maintain that backwards compatibility.

I suggest:

From c2716458f05893ca88c05ce211a295a330e74590 Mon Sep 17 00:00:00 2001
From:  René Scharfe <l.s.r@web.de>
Date: Sat, 24 Sep 2016 13:30:22 +0200
Subject: [PATCH] git-gui: stop using deprecated merge syntax

Starting with v2.5.0 git merge can handle FETCH_HEAD internally and
warns when it's called like 'git merge <message> HEAD <commit>' because
that syntax is deprecated.  Use this feature in git-gui and get rid of
that warning.

Tested-by: Johannes Sixt <j6t@kdbg.org>
Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
---
 lib/merge.tcl | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/lib/merge.tcl b/lib/merge.tcl
index 460d32f..2361b78 100644
--- a/lib/merge.tcl
+++ b/lib/merge.tcl
@@ -112,13 +112,16 @@ method _start {} {
 	close $fh
 	set _last_merged_branch $branch
 
-	set cmd [list git]
-	lappend cmd merge
-	lappend cmd --strategy=recursive
-	lappend cmd [git fmt-merge-msg <[gitdir FETCH_HEAD]]
-	lappend cmd HEAD
-	lappend cmd $name
-
+	if {[git-version >= "2.5.0"]} {
+		set cmd [list git merge --strategy=recursive FETCH_HEAD]
+	} else {
+		set cmd [list git]
+		lappend cmd merge
+		lappend cmd --strategy=recursive
+		lappend cmd [git fmt-merge-msg <[gitdir FETCH_HEAD]]
+		lappend cmd HEAD
+		lappend cmd $name
+	}
 	ui_status [mc "Merging %s and %s..." $current_branch $stitle]
 	set cons [console::new [mc "Merge"] "merge $stitle"]
 	console::exec $cons $cmd [cb _finish $cons]
-- 
2.10.0.windows.1