GNU bug report logs - #50464
Ediff 2.81.5 of July 4, 2013; Feature Suggestion: Support viewing diff between just remote & base or just local & base

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Package: emacs; Severity: wishlist; Reported by: mt bar <mtbar131@HIDDEN>; dated Tue, 7 Sep 2021 19:11:01 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.
Severity set to 'wishlist' from 'normal' Request was from Stefan Kangas <stefan@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: mt bar <mtbar131@HIDDEN>
Date: Tue, 7 Sep 2021 12:10:13 -0700
Message-ID: <CAMy5G4iJktVpCQhbs1B9sgi+vfHQ6JTnxeXH=v2yUypBC-3S2w@HIDDEN>
Subject: Ediff 2.81.5 of July 4, 2013; Feature Suggestion: Support viewing
 diff between just remote & base or just local & base
To: kifer@HIDDEN, bug-gnu-emacs@HIDDEN
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--0000000000008f93e105cb6c84c2
Content-Type: text/plain; charset="UTF-8"

Hi,

I am writing to suggest a new feature to the ediff package that I think can
improve the user experience when resolving complicated merges.

It would be helpful if ediff supported switching between a 3 way diff
(i.e a diff between BASE, LOCAL & MASTER) and a diff with only the BASE
(i.e a
diff between just the BASE & LOCAL or a diff between just the BASE &
REMOTE).

While resolving a complicated merge I use
`ediff-merge-files-with-ancestor` to see all 3 versions (i.e BASE, LOCAL
& REMOTE) of the same file. In this setup ediff shows the diff by
comparing all 3 versions of the file.I often find it helpful to first
copy all the contents of the LOCAL buffer into the COMBINED buffer and
then view diff between REMOTE & BASE one by one and merge them correctly
inside the COMBINED buffer manually. (I ask git to not automerge such
files by using the `mergetool.hideResolved` flag so that I don't miss
any change). However, as far as I know there is no way to ask ediff to
only show the diff between the REMOTE BASE instead of
the default 3-way diff. It is bit cumbersome to jump over
the 3-way diff hunks and manually isolate the diff between REMOTE & BASE
from the 3-way diff between LOCAL, REMOTE & BASE.

I probably am uninformed about some existing feature that already does
this so feel free to point me towards that. If not, I would really like
to see this support from ediff.

Thank you
Amit



Emacs  : GNU Emacs 26.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2020-06-16
Package: Ediff 2.81.5 of July 4, 2013

current state:
==============
(setq
 ediff-diff-program "diff"
 ediff-diff-options ""
 ediff-diff3-program "diff3"
 ediff-diff3-options ""
 ediff-patch-program "patch"
 ediff-patch-options "-f"
 ediff-shell "sh"
 ediff-use-faces t
 ediff-auto-refine 'on
 ediff-highlighting-style 'face
 ediff-buffer-A #<buffer layers_LOCAL_13445.go>
 ediff-buffer-B #<buffer layers_REMOTE_13445.go>
 ediff-control-buffer #<buffer *Ediff Control Panel*>
 ediff-forward-word-function 'ediff-forward-word
 ediff-control-frame nil
 ediff-control-frame-parameters '((name . "Ediff") (minibuffer)
(user-position . t) (vertical-scroll-bars) (scrollbar-width . 0)
 (scrollbar-height . 0) (menu-bar-lines . 0) (tool-bar-lines . 0)
(left-fringe . 0)
 (right-fringe . 0) (auto-lower) (auto-raise . t) (visibility) (width . 1)
(height . 1)
 (fullscreen) (top . 67) (left . 270))
 ediff-control-frame-position-function 'ediff-make-frame-position
 ediff-prefer-iconified-control-frame nil
 ediff-window-setup-function 'ediff-setup-windows-plain
 ediff-split-window-function 'split-window-horizontally
 ediff-job-name 'ediff-merge-files-with-ancestor
 ediff-word-mode nil
 ediff-buffer-name "*Ediff Control Panel*"
 ediff-device-type nil
 )

--0000000000008f93e105cb6c84c2
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi,</div><div><br></div><div>I am writing to suggest =
a new feature to the ediff package that I think can</div><div> improve the =
user experience when resolving complicated merges.<br></div><div><br></div>=
<div>It would be helpful if ediff supported switching between a 3 way diff<=
/div>(i.e a diff between BASE, LOCAL &amp; MASTER) and a diff with only the=
 BASE (i.e a<br>diff between just the BASE &amp; LOCAL or a diff between ju=
st the BASE &amp;<br>REMOTE).<br><br>While resolving a complicated merge I =
use<br>`ediff-merge-files-with-ancestor` to see all 3 versions (i.e BASE, L=
OCAL<br>&amp; REMOTE) of the same file. In this setup ediff shows the diff =
by<br>comparing all 3 versions of the file.I often find it helpful to first=
<br>copy all the contents of the LOCAL buffer into the COMBINED buffer and<=
br>then view diff between REMOTE &amp; BASE one by one and merge them corre=
ctly<br>inside the COMBINED buffer manually. (I ask git to not automerge su=
ch<br>files by using the `mergetool.hideResolved` flag so that I don&#39;t =
miss<br>any change). However, as far as I know there is no way to ask ediff=
 to<br>only show the diff between the REMOTE BASE instead of<br>the default=
 3-way diff. It is bit cumbersome to jump over<br>the 3-way diff hunks and =
manually isolate the diff between REMOTE &amp; BASE<br>from the 3-way=C2=A0=
diff between LOCAL, REMOTE &amp; BASE.<br><br>I probably am uninformed abou=
t some existing feature that already does<br>this so feel free to point me =
towards that. If not, I would really like<br><div>to see this support from =
ediff.</div><br>Thank you<br>Amit<br><br><br><br>Emacs =C2=A0: GNU Emacs 26=
.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)<br>=C2=A0of 2020-06=
-16<br>Package: Ediff 2.81.5 of July 4, 2013<br><br>current state:<br>=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>(setq<br>=C2=A0ediff-diff-progra=
m &quot;diff&quot;<br>=C2=A0ediff-diff-options &quot;&quot;<br>=C2=A0ediff-=
diff3-program &quot;diff3&quot;<br>=C2=A0ediff-diff3-options &quot;&quot;<b=
r>=C2=A0ediff-patch-program &quot;patch&quot;<br>=C2=A0ediff-patch-options =
&quot;-f&quot;<br>=C2=A0ediff-shell &quot;sh&quot;<br>=C2=A0ediff-use-faces=
 t<br>=C2=A0ediff-auto-refine &#39;on<br>=C2=A0ediff-highlighting-style &#3=
9;face<br>=C2=A0ediff-buffer-A #&lt;buffer layers_LOCAL_13445.go&gt;<br>=C2=
=A0ediff-buffer-B #&lt;buffer layers_REMOTE_13445.go&gt;<br>=C2=A0ediff-con=
trol-buffer #&lt;buffer *Ediff Control Panel*&gt;<br>=C2=A0ediff-forward-wo=
rd-function &#39;ediff-forward-word<br>=C2=A0ediff-control-frame nil<br>=C2=
=A0ediff-control-frame-parameters &#39;((name . &quot;Ediff&quot;) (minibuf=
fer) (user-position . t) (vertical-scroll-bars) (scrollbar-width . 0)<br>		=
		 =C2=A0(scrollbar-height . 0) (menu-bar-lines . 0) (tool-bar-lines . 0) (=
left-fringe . 0)<br>				 =C2=A0(right-fringe . 0) (auto-lower) (auto-raise =
. t) (visibility) (width . 1) (height . 1)<br>				 =C2=A0(fullscreen) (top =
. 67) (left . 270))<br>=C2=A0ediff-control-frame-position-function &#39;edi=
ff-make-frame-position<br>=C2=A0ediff-prefer-iconified-control-frame nil<br=
>=C2=A0ediff-window-setup-function &#39;ediff-setup-windows-plain<br>=C2=A0=
ediff-split-window-function &#39;split-window-horizontally<br>=C2=A0ediff-j=
ob-name &#39;ediff-merge-files-with-ancestor<br>=C2=A0ediff-word-mode nil<b=
r>=C2=A0ediff-buffer-name &quot;*Ediff Control Panel*&quot;<br>=C2=A0ediff-=
device-type nil<br>=C2=A0)<br></div>

--0000000000008f93e105cb6c84c2--




Acknowledgement sent to mt bar <mtbar131@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#50464; Package emacs. Full text available.
Please note: This is a static page, with minimal formatting, updated once a day.
Click here to see this page with the latest information and nicer formatting.
Last modified: Tue, 21 Sep 2021 16:00:02 UTC

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