[PATCH v3/RFC] Remove the use of '--' in merge program invocation

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From: Patrick Higgins
Date: Monday, June 16, 2008 - 4:33 pm

Put a "./" at the beginning of all paths given to the merge program so
that filenames beginning with a '-' character don't get interpreted as
options.

This deals with a problem where kdiff3 can be compiled with or without
support for the '--' separator between options and filenames.

Signed-off-by: Patrick Higgins <patrick.higgins@cexp.com>
---

This is applying Junio's idea because my earlier attempts would fail on files
that started with a dash. This should work for those files with kdiff3
compiled with or without '--' support, does not require any additional
overhead to determine if kdiff3 has that support, and the technique should
work for all merge programs in case any others have the problem kdiff3 has.

My only concern is if 'git ls-files -u' ever returns absolute paths, then this
will not work.

 git-mergetool.sh |   24 ++++++++++++------------
 1 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/git-mergetool.sh b/git-mergetool.sh
index fcdec4a..94187c3 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -141,10 +141,10 @@ merge_file () {
     fi
 
     ext="$$$(expr "$MERGED" : '.*\(\.[^/]*\)$')"
-    BACKUP="$MERGED.BACKUP.$ext"
-    LOCAL="$MERGED.LOCAL.$ext"
-    REMOTE="$MERGED.REMOTE.$ext"
-    BASE="$MERGED.BASE.$ext"
+    BACKUP="./$MERGED.BACKUP.$ext"
+    LOCAL="./$MERGED.LOCAL.$ext"
+    REMOTE="./$MERGED.REMOTE.$ext"
+    BASE="./$MERGED.BASE.$ext"
 
     mv -- "$MERGED" "$BACKUP"
     cp -- "$BACKUP" "$MERGED"
@@ -183,29 +183,29 @@ merge_file () {
 	kdiff3)
 	    if base_present ; then
 		("$merge_tool_path" --auto --L1 "$MERGED (Base)" --L2 "$MERGED (Local)" --L3 "$MERGED (Remote)" \
-		    -o "$MERGED" -- "$BASE" "$LOCAL" "$REMOTE" > /dev/null 2>&1)
+		    -o "$MERGED" "$BASE" "$LOCAL" "$REMOTE" > /dev/null 2>&1)
 	    else
 		("$merge_tool_path" --auto --L1 "$MERGED (Local)" --L2 "$MERGED (Remote)" \
-		    -o "$MERGED" -- "$LOCAL" "$REMOTE" > /dev/null 2>&1)
+		    -o "$MERGED" "$LOCAL" "$REMOTE" > /dev/null 2>&1)
 	    fi
 	    status=$?
 	    ;;
 	tkdiff)
 	    if base_present ; then
-		"$merge_tool_path" -a "$BASE" -o "$MERGED" -- "$LOCAL" "$REMOTE"
+		"$merge_tool_path" -a "$BASE" -o "$MERGED" "$LOCAL" "$REMOTE"
 	    else
-		"$merge_tool_path" -o "$MERGED" -- "$LOCAL" "$REMOTE"
+		"$merge_tool_path" -o "$MERGED" "$LOCAL" "$REMOTE"
 	    fi
 	    status=$?
 	    ;;
 	meld|vimdiff)
 	    touch "$BACKUP"
-	    "$merge_tool_path" -- "$LOCAL" "$MERGED" "$REMOTE"
+	    "$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"
 	    check_unchanged
 	    ;;
 	gvimdiff)
 	    touch "$BACKUP"
-	    "$merge_tool_path" -f -- "$LOCAL" "$MERGED" "$REMOTE"
+	    "$merge_tool_path" -f "$LOCAL" "$MERGED" "$REMOTE"
 	    check_unchanged
 	    ;;
 	xxdiff)
@@ -215,13 +215,13 @@ merge_file () {
 		    -R 'Accel.SaveAsMerged: "Ctrl-S"' \
 		    -R 'Accel.Search: "Ctrl+F"' \
 		    -R 'Accel.SearchForward: "Ctrl-G"' \
-		    --merged-file "$MERGED" -- "$LOCAL" "$BASE" "$REMOTE"
+		    --merged-file "$MERGED" "$LOCAL" "$BASE" "$REMOTE"
 	    else
 		"$merge_tool_path" -X --show-merged-pane \
 		    -R 'Accel.SaveAsMerged: "Ctrl-S"' \
 		    -R 'Accel.Search: "Ctrl+F"' \
 		    -R 'Accel.SearchForward: "Ctrl-G"' \
-		    --merged-file "$MERGED" -- "$LOCAL" "$REMOTE"
+		    --merged-file "$MERGED" "$LOCAL" "$REMOTE"
 	    fi
 	    check_unchanged
 	    ;;
-- 
1.5.6.rc2

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[PATCH v3/RFC] Remove the use of '--' in merge program inv ..., Patrick Higgins, (Mon Jun 16, 4:33 pm)