X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=builtin-diff.c;h=f77352b40decdc4cf8d2db29102703cb1193b49c;hb=e2b7eaf0ca3897940961d23392d4ff718867ea9f;hp=6ed7b6842ec533902427f2d47790d57aa5082365;hpb=63f328290a0edda617c0881a356c07280fbba459;p=git.git

diff --git a/builtin-diff.c b/builtin-diff.c
index 6ed7b6842..f77352b40 100644
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -188,6 +188,30 @@ void add_head(struct rev_info *revs)
 	add_pending_object(revs, obj, "HEAD");
 }
 
+static void refresh_index_quietly(void)
+{
+	struct lock_file *lock_file;
+	int fd;
+
+	lock_file = xcalloc(1, sizeof(struct lock_file));
+	fd = hold_locked_index(lock_file, 0);
+	if (fd < 0)
+		return;
+	discard_cache();
+	read_cache();
+	refresh_cache(REFRESH_QUIET|REFRESH_UNMERGED);
+	if (active_cache_changed) {
+		if (write_cache(fd, active_cache, active_nr) ||
+		    close(fd) ||
+		    commit_locked_index(lock_file))
+			; /*
+			   * silently ignore it -- we haven't mucked
+			   * with the real index.
+			   */
+	}
+	rollback_lock_file(lock_file);
+}
+
 int cmd_diff(int argc, const char **argv, const char *prefix)
 {
 	int i;
@@ -222,7 +246,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 	prefix = setup_git_directory_gently(&nongit);
 	git_config(git_diff_ui_config);
 	init_revisions(&rev, prefix);
-	rev.diffopt.skip_stat_unmatch = 1;
+	rev.diffopt.skip_stat_unmatch = !!diff_auto_refresh_index;
 
 	if (!setup_diff_no_index(&rev, argc, argv, nongit, prefix))
 		argc = 0;
@@ -346,11 +370,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
 	if (rev.diffopt.exit_with_status)
 		result = rev.diffopt.has_changes;
 
-	if ((rev.diffopt.output_format & DIFF_FORMAT_PATCH)
-	    && (1 < rev.diffopt.skip_stat_unmatch))
-		printf("Warning: %d path%s touched but unmodified. "
-		       "Consider running git-status.\n",
-		       rev.diffopt.skip_stat_unmatch - 1,
-		       rev.diffopt.skip_stat_unmatch == 2 ? "" : "s");
+	if (1 < rev.diffopt.skip_stat_unmatch)
+		refresh_index_quietly();
 	return result;
 }