contrib/difftool: add support for Kompare

Signed-off-by: Markus Heidelberg <markus.heidelberg@web.de>
Acked-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/difftool/git-difftool-helper

@@ -1,7 +1,7 @@
 #!/bin/sh
 # git-difftool-helper is a GIT_EXTERNAL_DIFF-compatible diff tool launcher.
-# It supports kdiff3, tkdiff, xxdiff, meld, opendiff, emerge, ecmerge,
-# vimdiff, gvimdiff, and custom user-configurable tools.
+# It supports kdiff3, kompare, tkdiff, xxdiff, meld, opendiff,
+# emerge, ecmerge, vimdiff, gvimdiff, and custom user-configurable tools.
 # This script is typically launched by using the 'git difftool'
 # convenience command.
 #
@@ -73,6 +73,10 @@ launch_merge_tool () {
 			> /dev/null 2>&1
 		;;
 
+	kompare)
+		"$merge_tool_path" "$LOCAL" "$REMOTE"
+		;;
+
 	tkdiff)
 		"$merge_tool_path" -o "$MERGED" "$LOCAL" "$REMOTE"
 		;;
@@ -134,7 +138,7 @@ valid_custom_tool() {
 # Built-in merge tools are always valid.
 valid_tool() {
 	case "$1" in
-	kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff | ecmerge)
+	kdiff3 | kompare | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff | ecmerge)
 		;; # happy
 	*)
 		if ! valid_custom_tool "$1"
@@ -180,14 +184,14 @@ if test -z "$merge_tool"; then
 
 	# We have a $DISPLAY so try some common UNIX merge tools
 	if test -n "$DISPLAY"; then
-		merge_tool_candidates="kdiff3 tkdiff xxdiff meld gvimdiff"
+		merge_tool_candidates="kdiff3 kompare tkdiff xxdiff meld gvimdiff"
 		# If gnome then prefer meld
 		if test -n "$GNOME_DESKTOP_SESSION_ID"; then
 			merge_tool_candidates="meld $merge_tool_candidates"
 		fi
-		# If KDE then prefer kdiff3
+		# If KDE then prefer kdiff3 or kompare
 		if test "$KDE_FULL_SESSION" = "true"; then
-			merge_tool_candidates="kdiff3 $merge_tool_candidates"
+			merge_tool_candidates="kdiff3 kompare $merge_tool_candidates"
 		fi
 	fi
 

contrib/difftool/git-difftool.txt

@@ -28,7 +28,8 @@ OPTIONS
 --tool=<tool>::
 	Use the merge resolution program specified by <tool>.
 	Valid merge tools are:
-	kdiff3, tkdiff, meld, xxdiff, emerge, vimdiff, gvimdiff, ecmerge, and opendiff
+	kdiff3, kompare, tkdiff, meld, xxdiff, emerge,
+	vimdiff, gvimdiff, ecmerge, and opendiff
 +
 If a merge resolution program is not specified, 'git-difftool'
 will use the configuration variable `merge.tool`.  If the