[PATCH] git-apply: Don't barf when --stat'ing a diff with no line changes.

diff --git a/diff-cache.c b/diff-cache.c
index 1e0fda52993f76afc0ee866f3e29a43469fcfd7c..603a6b7774e6de19bc2b80299e30fb801d8fd773 100644 (file)
--- a/diff-cache.c
+++ b/diff-cache.c
@@ -5,10 +5,14 @@ static int cached_only = 0;
 static int diff_output_format = DIFF_FORMAT_HUMAN;
 static int match_nonexisting = 0;
 static int detect_rename = 0;
+static int find_copies_harder = 0;
 static int diff_setup_opt = 0;
 static int diff_score_opt = 0;
 static const char *pickaxe = NULL;
 static int pickaxe_opts = 0;
+static int diff_break_opt = -1;
+static const char *orderfile = NULL;
+static const char *diff_filter = NULL;
 
 /* A file entry went away or appeared */
 static void show_file(const char *prefix, struct cache_entry *ce, unsigned char *sha1, unsigned int mode)
@@ -72,7 +76,7 @@ static int show_modified(struct cache_entry *old,
 
        oldmode = old->ce_mode;
        if (mode == oldmode && !memcmp(sha1, old->sha1, 20) &&
-           detect_rename < DIFF_DETECT_COPY)
+           !find_copies_harder)
                return 0;
 
        mode = ntohl(mode);
@@ -155,7 +159,7 @@ static void mark_merge_entries(void)
 }
 
 static char *diff_cache_usage =
-"git-diff-cache [-p] [-r] [-z] [-m] [-M] [-C] [-R] [-S<string>] [--cached] <tree-ish> [<path>...]";
+"git-diff-cache [-p] [-r] [-z] [-m] [--cached] [-R] [-B] [-M] [-C] [--find-copies-harder] [-O<orderfile>] [-S<string>] [--pickaxe-all] <tree-ish> [<path>...]";
 
 int main(int argc, const char **argv)
 {
@@ -165,13 +169,14 @@ int main(int argc, const char **argv)
        void *tree;
        unsigned long size;
        int ret;
+       int allow_options = 1;
        int i;
 
        read_cache();
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];
 
-               if (*arg != '-') {
+               if (!allow_options || *arg != '-') {
                        if (tree_name) {
                                pathspec = argv + i;
                                break;
@@ -180,6 +185,10 @@ int main(int argc, const char **argv)
                        continue;
                }
                        
+               if (!strcmp(arg, "--")) {
+                       allow_options = 0;
+                       continue;
+               }
                if (!strcmp(arg, "-r")) {
                        /* We accept the -r flag just to look like git-diff-tree */
                        continue;
@@ -188,14 +197,25 @@ int main(int argc, const char **argv)
                        diff_output_format = DIFF_FORMAT_PATCH;
                        continue;
                }
+               if (!strncmp(arg, "-B", 2)) {
+                       if ((diff_break_opt = diff_scoreopt_parse(arg)) == -1)
+                               usage(diff_cache_usage);
+                       continue;
+               }
                if (!strncmp(arg, "-M", 2)) {
                        detect_rename = DIFF_DETECT_RENAME;
-                       diff_score_opt = diff_scoreopt_parse(arg);
+                       if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
+                               usage(diff_cache_usage);
                        continue;
                }
                if (!strncmp(arg, "-C", 2)) {
                        detect_rename = DIFF_DETECT_COPY;
-                       diff_score_opt = diff_scoreopt_parse(arg);
+                       if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
+                               usage(diff_cache_usage);
+                       continue;
+               }
+               if (!strcmp(arg, "--find-copies-harder")) {
+                       find_copies_harder = 1;
                        continue;
                }
                if (!strcmp(arg, "-z")) {
@@ -210,6 +230,14 @@ int main(int argc, const char **argv)
                        pickaxe = arg + 2;
                        continue;
                }
+               if (!strncmp(arg, "--diff-filter=", 14)) {
+                       diff_filter = arg + 14;
+                       continue;
+               }
+               if (!strncmp(arg, "-O", 2)) {
+                       orderfile = arg + 2;
+                       continue;
+               }
                if (!strcmp(arg, "--pickaxe-all")) {
                        pickaxe_opts = DIFF_PICKAXE_ALL;
                        continue;
@@ -225,6 +253,9 @@ int main(int argc, const char **argv)
                usage(diff_cache_usage);
        }
 
+       if (find_copies_harder && detect_rename != DIFF_DETECT_COPY)
+               usage(diff_cache_usage);
+
        if (!tree_name || get_sha1(tree_name, sha1))
                usage(diff_cache_usage);
 
@@ -240,12 +271,12 @@ int main(int argc, const char **argv)
                die("unable to read tree object %s", tree_name);
 
        ret = diff_cache(active_cache, active_nr);
-       if (pathspec)
-               diffcore_pathspec(pathspec);
-       if (detect_rename)
-               diffcore_rename(detect_rename, diff_score_opt);
-       if (pickaxe)
-               diffcore_pickaxe(pickaxe, pickaxe_opts);
-       diff_flush(diff_output_format, 1);
+
+       diffcore_std(pathspec ? : NULL,
+                    detect_rename, diff_score_opt,
+                    pickaxe, pickaxe_opts,
+                    diff_break_opt,
+                    orderfile, diff_filter);
+       diff_flush(diff_output_format);
        return ret;
 }