# PATCH to add a button to perform a meld on the current file

2 messages from 2007-09-07 to 2007-09-07. Participants: Pierre Marc Dumuid, Johannes Schindelin.
Thread: https://gitlist.dev/t/9815

## Pierre Marc Dumuid, 2007-09-07 04:46

Subject: PATCH to add a button to perform a meld on the current file
Message-ID: <46E0D79E.3080606@adelaide.edu.au>
URL: https://gitlist.dev/e/46E0D79E.3080606%40adelaide.edu.au

```
Here's a dodgy [not that good] patch to perform a GUI comparison on a file.
It is dodgy because it assumes cogito is installed, and you want to use 
meld, and it doesn't remove the temporary files.

Not expecting this to go into main branch, but I find it handy for my 
own purposes nether-the-less.

Pierre


--- /usr/bin/gitk	2007-08-06 07:55:41.000000000 +0930
+++ /home/pmdumuid/bin/gitkpmd	2007-09-07 14:09:28.000000000 +0930
@@ -609,7 +609,9 @@
 	-command changediffdisp -variable diffelide -value {0 1}
     radiobutton .bleft.mid.new -text "New version" \
 	-command changediffdisp -variable diffelide -value {1 0}
-    pack .bleft.mid.diff .bleft.mid.old .bleft.mid.new -side left
+    button .bleft.top.meld -text "GUI diff" -command doguidiff \
+	-font $uifont
+    pack .bleft.mid.diff .bleft.mid.old .bleft.mid.new .bleft.top.meld -side left
     set ctext .bleft.ctext
     text $ctext -background $bgcolor -foreground $fgcolor \
 	-state disabled -font $textfont \
@@ -4564,6 +4566,19 @@
     }
 }
 
+proc doguidiff {} {
+    global cflist sha1string
+
+    set taglist [$cflist tag ranges highlight]
+    set from [lindex $taglist 0]
+    set to [lindex $taglist 1]
+
+    set fname [$cflist get $from $to]
+    exec cg-admin-cat -r $sha1string^ $fname > .gitk_diffolder
+    exec cg-admin-cat -r $sha1string $fname > .gitk_diffnewer
+    exec meld .gitk_diffolder .gitk_diffnewer &
+}
+
 proc dosearch {} {
     global sstring ctext searchstring searchdirn
 

```

## Johannes Schindelin, 2007-09-07 11:25

Subject: Re: PATCH to add a button to perform a meld on the current file
Message-ID: <Pine.LNX.4.64.0709071214330.28586@racer.site>
URL: https://gitlist.dev/e/Pine.LNX.4.64.0709071214330.28586%40racer.site
In-Reply-To: <46E0D79E.3080606@adelaide.edu.au>

```
Hi,

On Fri, 7 Sep 2007, Pierre Marc Dumuid wrote:

> Here's a dodgy [not that good] patch to perform a GUI comparison on a 
> file. It is dodgy because it assumes cogito is installed, and you want 
> to use meld, and it doesn't remove the temporary files.

cogito is phased out.

> Not expecting this to go into main branch, but I find it handy for my 
> own purposes nether-the-less.

Just in case you want to get it in, here are some comments (made harder by 
the fact that you did not follow Documentation/SubmittingPatches)...

> --- /usr/bin/gitk	2007-08-06 07:55:41.000000000 +0930
> +++ /home/pmdumuid/bin/gitkpmd	2007-09-07 14:09:28.000000000 +0930

You might want to consider using format-patch next time ;-)

> @@ -4564,6 +4566,19 @@
>      }
>  }
>  
> +proc doguidiff {} {
> +    global cflist sha1string
> +
> +    set taglist [$cflist tag ranges highlight]
> +    set from [lindex $taglist 0]
> +    set to [lindex $taglist 1]
> +
> +    set fname [$cflist get $from $to]
> +    exec cg-admin-cat -r $sha1string^ $fname > .gitk_diffolder
> +    exec cg-admin-cat -r $sha1string $fname > .gitk_diffnewer

This can be be achieved by "git cat-file -t blob $sha1string^:$fname", and 
likewise for $sha1string.

+    exec meld .gitk_diffolder .gitk_diffnewer &
+}

Hmm.  If you allow it to block, you might have more chances to clean up 
the temporary files...

Also, it would be nice to have it configurable which tool you use, a la 
git-mergetool.

Ciao,
Dscho
 

```