run-command documentation: fix "memset()" parameter

diff --git a/builtin-diff.c b/builtin-diff.c
index 583291a9c0e52ed8c8e678606be7ec02b603db60..4c289e798a25ee3893a483abd8465740999dcbef 100644 (file)
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -202,6 +202,37 @@ static void refresh_index_quietly(void)
        rollback_lock_file(lock_file);
 }
 
+static int builtin_diff_files(struct rev_info *revs, int argc, const char **argv)
+{
+       int result;
+       unsigned int options = 0;
+
+       while (1 < argc && argv[1][0] == '-') {
+               if (!strcmp(argv[1], "--base"))
+                       revs->max_count = 1;
+               else if (!strcmp(argv[1], "--ours"))
+                       revs->max_count = 2;
+               else if (!strcmp(argv[1], "--theirs"))
+                       revs->max_count = 3;
+               else if (!strcmp(argv[1], "-q"))
+                       options |= DIFF_SILENT_ON_REMOVED;
+               else
+                       return error("invalid option: %s", argv[1]);
+               argv++; argc--;
+       }
+
+       if (revs->max_count == -1 &&
+           (revs->diffopt.output_format & DIFF_FORMAT_PATCH))
+               revs->combine_merges = revs->dense_combined_merges = 1;
+
+       if (read_cache() < 0) {
+               perror("read_cache");
+               return -1;
+       }
+       result = run_diff_files(revs, options);
+       return diff_result_code(&revs->diffopt, result);
+}
+
 int cmd_diff(int argc, const char **argv, const char *prefix)
 {
        int i;
@@ -230,6 +261,9 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
         * N=2, M=0:
         *      tree vs tree (diff-tree)
         *
+        * N=0, M=0, P=2:
+        *      compare two filesystem entities (aka --no-index).
+        *
         * Other cases are errors.
         */
 
@@ -240,21 +274,21 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                diff_use_color_default = git_use_color_default;
 
        init_revisions(&rev, prefix);
+
+       /* If this is a no-index diff, just run it and exit there. */
+       diff_no_index(&rev, argc, argv, nongit, prefix);
+
+       /* Otherwise, we are doing the usual "git" diff */
        rev.diffopt.skip_stat_unmatch = !!diff_auto_refresh_index;
 
-       if (!setup_diff_no_index(&rev, argc, argv, nongit, prefix))
-               argc = 0;
-       else
-               argc = setup_revisions(argc, argv, &rev, NULL);
+       if (nongit)
+               die("Not a git repository");
+       argc = setup_revisions(argc, argv, &rev, NULL);
        if (!rev.diffopt.output_format) {
                rev.diffopt.output_format = DIFF_FORMAT_PATCH;
                if (diff_setup_done(&rev.diffopt) < 0)
                        die("diff_setup_done failed");
        }
-       if (rev.diffopt.prefix && nongit) {
-               rev.diffopt.prefix = NULL;
-               rev.diffopt.prefix_length = 0;
-       }
        DIFF_OPT_SET(&rev.diffopt, ALLOW_EXTERNAL);
        DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
 
@@ -265,7 +299,8 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        if (!DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS))
                setup_pager();
 
-       /* Do we have --cached and not have a pending object, then
+       /*
+        * Do we have --cached and not have a pending object, then
         * default to HEAD by hand.  Eek.
         */
        if (!rev.pending.nr) {
@@ -333,7 +368,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        if (!ents) {
                switch (blobs) {
                case 0:
-                       result = run_diff_files_cmd(&rev, argc, argv);
+                       result = builtin_diff_files(&rev, argc, argv);
                        break;
                case 1:
                        if (paths != 1)