[PATCH] mergetool: add support for ECMerge

[Steffen Prohaska <prohaska@zib.de>]

Add support for ECMerge available from
http://www.elliecomputing.com/Products/merge_overview.asp

Signed-off-by: Steffen Prohaska <prohaska@zib.de>
---
 Documentation/git-mergetool.txt |    2 +-
 git-mergetool.sh                |   12 +++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-mergetool.txt b/Documentation/git-mergetool.txt
index 6b97aaa..ece7718 100644
--- a/Documentation/git-mergetool.txt
+++ b/Documentation/git-mergetool.txt
@@ -25,7 +25,7 @@ OPTIONS
 -t or --tool=<tool>::
 	Use the merge resolution program specified by <tool>.
 	Valid merge tools are:
-	kdiff3, tkdiff, meld, xxdiff, emerge, vimdiff, gvimdiff, and opendiff
+	kdiff3, tkdiff, meld, xxdiff, emerge, vimdiff, gvimdiff, ecmerge, and opendiff
 +
 If a merge resolution program is not specified, 'git mergetool'
 will use the configuration variable merge.tool.  If the
diff --git a/git-mergetool.sh b/git-mergetool.sh
index 7f6c16f..39f6595 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -250,6 +250,16 @@ merge_file () {
 	    check_unchanged
 	    save_backup
 	    ;;
+	ecmerge)
+	    touch "$BACKUP"
+	    if base_present; then
+		"$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" --mode=merge3 --to="$path"
+	    else
+		"$merge_tool_path" "$LOCAL" "$REMOTE" --mode=merge2 --to="$path"
+	    fi
+	    check_unchanged
+	    save_backup
+	    ;;
 	emerge)
 	    if base_present ; then
 		"$merge_tool_path" -f emerge-files-with-ancestor-command "$LOCAL" "$REMOTE" "$BASE" "$(basename "$path")"
@@ -299,7 +309,7 @@ done
 
 valid_tool() {
 	case "$1" in
-		kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff)
+		kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff | ecmerge)
 			;; # happy
 		*)
 			return 1
-- 
1.5.3.3.127.g40d17