Add post-merge hook, related documentation, and tests.

diff --git a/builtin-apply.c b/builtin-apply.c
index 79a4852bc24077b13bfa5e71fe04ee599717f310..86d89a4a7e9240a75e1500bba524acdcec7f14d2 100644 (file)
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -254,7 +254,7 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
                if (name) {
                        char *cp = name;
                        while (p_value) {
-                               cp = strchr(name, '/');
+                               cp = strchr(cp, '/');
                                if (!cp)
                                        break;
                                cp++;
@@ -1642,15 +1642,22 @@ static int apply_line(char *output, const char *patch, int plen)
 
        buf = output;
        if (need_fix_leading_space) {
+               int consecutive_spaces = 0;
                /* between patch[1..last_tab_in_indent] strip the
                 * funny spaces, updating them to tab as needed.
                 */
                for (i = 1; i < last_tab_in_indent; i++, plen--) {
                        char ch = patch[i];
-                       if (ch != ' ')
+                       if (ch != ' ') {
+                               consecutive_spaces = 0;
                                *output++ = ch;
-                       else if ((i % 8) == 0)
-                               *output++ = '\t';
+                       } else {
+                               consecutive_spaces++;
+                               if (consecutive_spaces == 8) {
+                                       *output++ = '\t';
+                                       consecutive_spaces = 0;
+                               }
+                       }
                }
                fixed = 1;
                i = last_tab_in_indent;
@@ -2227,6 +2234,20 @@ static int check_patch_list(struct patch *patch)
        return err;
 }
 
+/* This function tries to read the sha1 from the current index */
+static int get_current_sha1(const char *path, unsigned char *sha1)
+{
+       int pos;
+
+       if (read_cache() < 0)
+               return -1;
+       pos = cache_name_pos(path, strlen(path));
+       if (pos < 0)
+               return -1;
+       hashcpy(sha1, active_cache[pos]->sha1);
+       return 0;
+}
+
 static void show_index_list(struct patch *list)
 {
        struct patch *patch;
@@ -2243,8 +2264,16 @@ static void show_index_list(struct patch *list)
                if (0 < patch->is_new)
                        sha1_ptr = null_sha1;
                else if (get_sha1(patch->old_sha1_prefix, sha1))
-                       die("sha1 information is lacking or useless (%s).",
-                           name);
+                       /* git diff has no index line for mode/type changes */
+                       if (!patch->lines_added && !patch->lines_deleted) {
+                               if (get_current_sha1(patch->new_name, sha1) ||
+                                   get_current_sha1(patch->old_name, sha1))
+                                       die("mode change for %s, which is not "
+                                               "in current HEAD", name);
+                               sha1_ptr = sha1;
+                       } else
+                               die("sha1 information is lacking or useless "
+                                       "(%s).", name);
                else
                        sha1_ptr = sha1;