static int check_valid_sha1(unsigned char *sha1)
{
- char *filename = sha1_file_name(sha1);
int ret;
/* If we were anal, we'd check that the sha1 of the contents actually matches */
- ret = access(filename, R_OK);
- if (ret)
- perror(filename);
- return ret;
+ ret = has_sha1_file(sha1);
+ if (ret == 0)
+ perror(sha1_file_name(sha1));
+ return ret ? 0 : -1;
}
-static int prepend_integer(char *buffer, unsigned val, int i)
-{
- buffer[--i] = '\0';
- do {
- buffer[--i] = '0' + (val % 10);
- val /= 10;
- } while (val);
- return i;
-}
-
-#define ORIG_OFFSET (40) /* Enough space to add the header of "tree <size>\0" */
-
static int write_tree(struct cache_entry **cachep, int maxentries, const char *base, int baselen, unsigned char *returnsha1)
{
unsigned char subdir_sha1[20];
unsigned long size, offset;
char *buffer;
- int i, nr;
+ int nr;
/* Guess at some random initial size */
size = 8192;
- buffer = malloc(size);
- offset = ORIG_OFFSET;
+ buffer = xmalloc(size);
+ offset = 0;
nr = 0;
- do {
+ while (nr < maxentries) {
struct cache_entry *ce = cachep[nr];
const char *pathname = ce->name, *filename, *dirname;
- int pathlen = ce->namelen, entrylen;
+ int pathlen = ce_namelen(ce), entrylen;
unsigned char *sha1;
unsigned int mode;
break;
sha1 = ce->sha1;
- mode = ce->st_mode;
+ mode = ntohl(ce->ce_mode);
/* Do we have _further_ subdirectories? */
filename = pathname + baselen;
int subdir_written;
subdir_written = write_tree(cachep + nr, maxentries - nr, pathname, dirname-pathname+1, subdir_sha1);
- fprintf(stderr, "Wrote %d entries from subdirectory '%.*s'\n",
- subdir_written, dirname-pathname, pathname);
nr += subdir_written;
/* Now we need to write out the directory entry into this tree.. */
entrylen = pathlen - baselen;
if (offset + entrylen + 100 > size) {
size = alloc_nr(offset + entrylen + 100);
- buffer = realloc(buffer, size);
+ buffer = xrealloc(buffer, size);
}
offset += sprintf(buffer + offset, "%o %.*s", mode, entrylen, filename);
buffer[offset++] = 0;
memcpy(buffer + offset, sha1, 20);
offset += 20;
nr++;
- } while (nr < maxentries);
-
- i = prepend_integer(buffer, offset - ORIG_OFFSET, ORIG_OFFSET);
- i -= 5;
- memcpy(buffer+i, "tree ", 5);
+ }
- buffer += i;
- offset -= i;
-
- write_sha1_file(buffer, offset, returnsha1);
+ write_sha1_file(buffer, offset, "tree", returnsha1);
+ free(buffer);
return nr;
}
int main(int argc, char **argv)
{
+ int i, funny;
int entries = read_cache();
unsigned char sha1[20];
- if (entries <= 0)
- usage("no cache contents to write");
+ if (entries < 0)
+ die("git-write-tree: error reading cache");
+
+ /* Verify that the tree is merged */
+ funny = 0;
+ for (i = 0; i < entries; i++) {
+ struct cache_entry *ce = active_cache[i];
+ if (ntohs(ce->ce_flags) & ~CE_NAMEMASK) {
+ if (10 < ++funny) {
+ fprintf(stderr, "...\n");
+ break;
+ }
+ fprintf(stderr, "%s: unmerged (%s)\n", ce->name, sha1_to_hex(ce->sha1));
+ }
+ }
+ if (funny)
+ die("git-write-tree: not able to write tree");
+
+ /* Also verify that the cache does not have path and path/file
+ * at the same time. At this point we know the cache has only
+ * stage 0 entries.
+ */
+ funny = 0;
+ for (i = 0; i < entries - 1; i++) {
+ /* path/file always comes after path because of the way
+ * the cache is sorted. Also path can appear only once,
+ * which means conflicting one would immediately follow.
+ */
+ const char *this_name = active_cache[i]->name;
+ const char *next_name = active_cache[i+1]->name;
+ int this_len = strlen(this_name);
+ if (this_len < strlen(next_name) &&
+ strncmp(this_name, next_name, this_len) == 0 &&
+ next_name[this_len] == '/') {
+ if (10 < ++funny) {
+ fprintf(stderr, "...\n");
+ break;
+ }
+ fprintf(stderr, "You have both %s and %s\n",
+ this_name, next_name);
+ }
+ }
+ if (funny)
+ die("git-write-tree: not able to write tree");
+
+ /* Ok, write it out */
if (write_tree(active_cache, entries, "", 0, sha1) != entries)
- usage("write-tree: internal error");
+ die("git-write-tree: internal error");
printf("%s\n", sha1_to_hex(sha1));
return 0;
}