am --skip/--abort: merge HEAD/ORIG_HEAD tree into index

diff --git a/builtin/diff-index.c b/builtin/diff-index.c
index 04837494feba401c7f689eab5574768d3fd126de..d979824f9395a0cbc8ffffa9cede524589710d43 100644 (file)
--- a/builtin/diff-index.c
+++ b/builtin/diff-index.c
@@ -3,10 +3,11 @@
 #include "commit.h"
 #include "revision.h"
 #include "builtin.h"
+#include "submodule.h"
 
 static const char diff_cache_usage[] =
 "git diff-index [-m] [--cached] "
-"[<common diff options>] <tree-ish> [<path>...]"
+"[<common-diff-options>] <tree-ish> [<path>...]"
 COMMON_DIFF_OPTIONS_HELP;
 
 int cmd_diff_index(int argc, const char **argv, const char *prefix)
@@ -17,6 +18,7 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
        int result;
 
        init_revisions(&rev, prefix);
+       gitmodules_config();
        git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
        rev.abbrev = 0;
 
@@ -39,9 +41,13 @@ int cmd_diff_index(int argc, const char **argv, const char *prefix)
        if (rev.pending.nr != 1 ||
            rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
                usage(diff_cache_usage);
-       if (!cached)
+       if (!cached) {
                setup_work_tree();
-       if (read_cache() < 0) {
+               if (read_cache_preload(&rev.diffopt.pathspec) < 0) {
+                       perror("read_cache_preload");
+                       return -1;
+               }
+       } else if (read_cache() < 0) {
                perror("read_cache");
                return -1;
        }