git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/git-merge.sh b/git-merge.sh
index 1c123a37e6941b6727c6101bb29cbc485a380c20..7dbbb1d79dc1d66db3a662045a13554f8d574004 100755 (executable)
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -37,6 +37,7 @@ use_strategies=
 
 allow_fast_forward=t
 allow_trivial_merge=t
+squash= no_commit=
 
 dropsave() {
        rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \
@@ -70,7 +71,7 @@ finish_up_to_date () {
 squash_message () {
        echo Squashed commit of the following:
        echo
-       git log --no-merges ^"$head" $remoteheads
+       git log --no-merges --pretty=medium ^"$head" $remoteheads
 }
 
 finish () {
@@ -152,17 +153,21 @@ parse_config () {
                --summary)
                        show_diffstat=t ;;
                --squash)
-                       allow_fast_forward=t squash=t no_commit=t ;;
+                       test "$allow_fast_forward" = t ||
+                               die "You cannot combine --squash with --no-ff."
+                       squash=t no_commit=t ;;
                --no-squash)
-                       allow_fast_forward=t squash= no_commit= ;;
+                       squash= no_commit= ;;
                --commit)
-                       allow_fast_forward=t squash= no_commit= ;;
+                       no_commit= ;;
                --no-commit)
-                       allow_fast_forward=t squash= no_commit=t ;;
+                       no_commit=t ;;
                --ff)
-                       allow_fast_forward=t squash= no_commit= ;;
+                       allow_fast_forward=t ;;
                --no-ff)
-                       allow_fast_forward=false squash= no_commit= ;;
+                       test "$squash" != t ||
+                               die "You cannot combine --squash with --no-ff."
+                       allow_fast_forward=f ;;
                -s|--strategy)
                        shift
                        case " $all_strategies " in