char *buf,
size_t len, size_t postlen)
{
- int i, ctx;
+ int i, ctx, reduced;
char *new, *old, *fixed;
struct image fixed_preimage;
* free "oldlines".
*/
prepare_image(&fixed_preimage, buf, len, 1);
- assert(fixed_preimage.nr == preimage->nr);
- for (i = 0; i < preimage->nr; i++)
+ assert(postlen
+ ? fixed_preimage.nr == preimage->nr
+ : fixed_preimage.nr <= preimage->nr);
+ for (i = 0; i < fixed_preimage.nr; i++)
fixed_preimage.line[i].flag = preimage->line[i].flag;
free(preimage->line_allocated);
*preimage = fixed_preimage;
else
new = old;
fixed = preimage->buf;
- for (i = ctx = 0; i < postimage->nr; i++) {
+
+ for (i = reduced = ctx = 0; i < postimage->nr; i++) {
size_t len = postimage->line[i].len;
if (!(postimage->line[i].flag & LINE_COMMON)) {
/* an added line -- no counterparts in preimage */
fixed += preimage->line[ctx].len;
ctx++;
}
- if (preimage->nr <= ctx)
- die(_("oops"));
+
+ /*
+ * preimage is expected to run out, if the caller
+ * fixed addition of trailing blank lines.
+ */
+ if (preimage->nr <= ctx) {
+ reduced++;
+ continue;
+ }
/* and copy it in, while fixing the line length */
len = preimage->line[ctx].len;
/* Fix the length of the whole thing */
postimage->len = new - postimage->buf;
+ postimage->nr -= reduced;
}
static int match_fragment(struct image *img,
return 0;
}
+static int preimage_sha1_in_gitlink_patch(struct patch *p, unsigned char sha1[20])
+{
+ /*
+ * A usable gitlink patch has only one fragment (hunk) that looks like:
+ * @@ -1 +1 @@
+ * -Subproject commit <old sha1>
+ * +Subproject commit <new sha1>
+ * or
+ * @@ -1 +0,0 @@
+ * -Subproject commit <old sha1>
+ * for a removal patch.
+ */
+ struct fragment *hunk = p->fragments;
+ static const char heading[] = "-Subproject commit ";
+ char *preimage;
+
+ if (/* does the patch have only one hunk? */
+ hunk && !hunk->next &&
+ /* is its preimage one line? */
+ hunk->oldpos == 1 && hunk->oldlines == 1 &&
+ /* does preimage begin with the heading? */
+ (preimage = memchr(hunk->patch, '\n', hunk->size)) != NULL &&
+ !prefixcmp(++preimage, heading) &&
+ /* does it record full SHA-1? */
+ !get_sha1_hex(preimage + sizeof(heading) - 1, sha1) &&
+ preimage[sizeof(heading) + 40 - 1] == '\n' &&
+ /* does the abbreviated name on the index line agree with it? */
+ !prefixcmp(preimage + sizeof(heading) - 1, p->old_sha1_prefix))
+ return 0; /* it all looks fine */
+
+ /* we may have full object name on the index line */
+ return get_sha1_hex(p->old_sha1_prefix, sha1);
+}
+
/* Build an index that contains the just the files needed for a 3way merge */
static void build_fake_ancestor(struct patch *list, const char *filename)
{
* worth showing the new sha1 prefix, but until then...
*/
for (patch = list; patch; patch = patch->next) {
- const unsigned char *sha1_ptr;
unsigned char sha1[20];
struct cache_entry *ce;
const char *name;
name = patch->old_name ? patch->old_name : patch->new_name;
if (0 < patch->is_new)
continue;
- else if (get_sha1_blob(patch->old_sha1_prefix, sha1))
- /* git diff has no index line for mode/type changes */
- if (!patch->lines_added && !patch->lines_deleted) {
- if (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;
- ce = make_cache_entry(patch->old_mode, sha1_ptr, name, 0, 0);
+ if (S_ISGITLINK(patch->old_mode)) {
+ if (!preimage_sha1_in_gitlink_patch(patch, sha1))
+ ; /* ok, the textual part looks sane */
+ else
+ die("sha1 information is lacking or useless for submoule %s",
+ name);
+ } else if (!get_sha1_blob(patch->old_sha1_prefix, sha1)) {
+ ; /* ok */
+ } else if (!patch->lines_added && !patch->lines_deleted) {
+ /* mode-only change: update the current */
+ if (get_current_sha1(patch->old_name, sha1))
+ die("mode change for %s, which is not "
+ "in current HEAD", name);
+ } else
+ die("sha1 information is lacking or useless "
+ "(%s).", name);
+
+ ce = make_cache_entry(patch->old_mode, sha1, name, 0, 0);
if (!ce)
die(_("make_cache_entry failed for path '%s'"), name);
if (add_index_entry(&result, ce, ADD_CACHE_OK_TO_ADD))
OPT_NOOP_NOARG(0, "allow-binary-replacement"),
OPT_NOOP_NOARG(0, "binary"),
OPT_BOOLEAN(0, "numstat", &numstat,
- N_("shows number of added and deleted lines in decimal notation")),
+ N_("show number of added and deleted lines in decimal notation")),
OPT_BOOLEAN(0, "summary", &summary,
N_("instead of applying the patch, output a summary for the input")),
OPT_BOOLEAN(0, "check", &check,