Only add -u to diff() call if more than two args

1 files changed, 13 insertions, 1 deletions

diff --git a/sh/shrc.d/diff.sh b/sh/shrc.d/diff.sh
index 2c752c8d..179ced94 100644
--- a/sh/shrc.d/diff.sh
+++ b/sh/shrc.d/diff.sh
@@ -1,4 +1,16 @@
 # Use a unified format for diff(1) by default
 diff() {
-    command diff -u "$@"
+    if (
+        for arg ; do
+            case $arg in
+                -*) shift ;;
+                --) shift ; break ;;
+                *) break ;;
+            esac
+        done
+        [ "$#" -gt 1 ]
+    ) ; then
+        set -- -u "$@"
+    fi
+    command diff "$@"
 }