Re: [BUG] Regression in 'git mergetool --tool-help'

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Hi Junio,
Hi Felipe,

Le 2020-12-19 à 12:13, Junio C Hamano a écrit :
Felipe Contreras <felipe.contreras@xxxxxxxxx> writes:

Junio C Hamano wrote:
Felipe Contreras <felipe.contreras@xxxxxxxxx> writes:
How about this?

--- a/git-mergetool--lib.sh
+++ b/git-mergetool--lib.sh
@@ -46,7 +46,7 @@ show_tool_names () {
                 while read scriptname
                 do
                         setup_tool "$scriptname" 2>/dev/null
-                       variants="$variants$(list_tool_variants)\n"
+                       variants="$variants$(list_tool_variants)"$'\n'
                 done
                 variants="$(echo "$variants" | sort | uniq)"

Ah, I didn't see your variant before sending mine.  $'\n' would work
with bash but we prefer not to rely on bashisms here.


Thanks for both answers. Felipe's solution does the trick, but Junio's does not;
it seems we do have to have a newline there. The following also works, and I think
is portable:

diff --git i/git-mergetool--lib.sh w/git-mergetool--lib.sh
index 2defef28cd..6f03975493 100644
--- i/git-mergetool--lib.sh
+++ w/git-mergetool--lib.sh
@@ -46,7 +46,7 @@ show_tool_names () {
 		while read scriptname
 		do
 			setup_tool "$scriptname" 2>/dev/null
-			variants="$variants$(list_tool_variants)\n"
+			variants="$(echo "$variants" && list_tool_variants)"
 		done
 		variants="$(echo "$variants" | sort | uniq)"

I figured out what was different between the different Ubuntu versions I was testing:
the Ubuntu 14 and 18 systems have Bash as /bin/sh, but my Ubuntu 20 system
has /usr/bin/dash as /bin/sh (the default for Ubuntu these days).

I'll try to send a formal patch with the diff above, time permitting...

Also of note: I was wondering why 'araxis' was showing up in the list of available tools,
as Araxis Merge is macOS and Windows only (!). Turns out that the imagemagick package installs
a /usr/bin/compare symlink to /usr/bin/compare-im6.q16, so since Araxis merge is registered in
mergetools/araxis::translate_merge_tool_path as 'compare', it ends up in the list of available
merge tools... I think we could do better here but I'm not sure how.

Cheers,

Philippe.



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