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

diff --git a/diff-stages.c b/diff-stages.c
index 4b87c8ef7b17b19ca4f018dbb77b2e78aa7902af..9d8cc73e67165e685b6938172ca7dc68330ed31b 100644 (file)
--- a/diff-stages.c
+++ b/diff-stages.c
@@ -7,6 +7,7 @@
 
 static int diff_output_format = DIFF_FORMAT_HUMAN;
 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;
@@ -16,7 +17,7 @@ static const char *orderfile = NULL;
 static const char *diff_filter = NULL;
 
 static char *diff_stages_usage =
-"git-diff-stages [-p] [-r] [-z] [-M] [-C] [-R] [-S<string>] [-O<orderfile>] <stage1> <stage2> [<path>...]";
+"git-diff-stages [-p] [-r] [-z] [-R] [-B] [-M] [-C] [--find-copies-harder] [-O<orderfile>] [-S<string>] [--pickaxe-all] <stage1> <stage2> [<path>...]";
 
 static void diff_stages(int stage1, int stage2)
 {
@@ -50,9 +51,10 @@ static void diff_stages(int stage1, int stage2)
                        diff_addremove('-', ntohl(one->ce_mode),
                                       one->sha1, name, NULL);
                else if (memcmp(one->sha1, two->sha1, 20) ||
-                        (one->ce_mode != two->ce_mode))
-                        diff_change(ntohl(one->ce_mode), ntohl(two->ce_mode),
-                                    one->sha1, two->sha1, name, NULL);
+                        (one->ce_mode != two->ce_mode) ||
+                        find_copies_harder)
+                       diff_change(ntohl(one->ce_mode), ntohl(two->ce_mode),
+                                   one->sha1, two->sha1, name, NULL);
        }
 }
 
@@ -81,6 +83,8 @@ int main(int ac, const char **av)
                        if ((diff_score_opt = diff_scoreopt_parse(arg)) == -1)
                                usage(diff_stages_usage);
                }
+               else if (!strcmp(arg, "--find-copies-harder"))
+                       find_copies_harder = 1;
                else if (!strcmp(arg, "-z"))
                        diff_output_format = DIFF_FORMAT_MACHINE;
                else if (!strcmp(arg, "-R"))
@@ -102,7 +106,8 @@ int main(int ac, const char **av)
            sscanf(av[1], "%d", &stage1) != 1 ||
            ! (0 <= stage1 && stage1 <= 3) ||
            sscanf(av[2], "%d", &stage2) != 1 ||
-           ! (0 <= stage2 && stage2 <= 3))
+           ! (0 <= stage2 && stage2 <= 3) ||
+           (find_copies_harder && detect_rename != DIFF_DETECT_COPY))
                usage(diff_stages_usage);
 
        av += 3; /* The rest from av[0] are for paths restriction. */