* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
+#include "tree.h"
+
+static int missing_ok = 0;
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)
+static int write_tree(struct cache_entry **cachep, int maxentries, const char *base, int baselen, unsigned char *returnsha1)
{
- buffer[--i] = '\0';
- do {
- buffer[--i] = '0' + (val % 10);
- val /= 10;
- } while (val);
- return i;
+ unsigned char subdir_sha1[20];
+ unsigned long size, offset;
+ char *buffer;
+ int nr;
+
+ /* Guess at some random initial size */
+ size = 8192;
+ buffer = xmalloc(size);
+ offset = 0;
+
+ nr = 0;
+ while (nr < maxentries) {
+ struct cache_entry *ce = cachep[nr];
+ const char *pathname = ce->name, *filename, *dirname;
+ int pathlen = ce_namelen(ce), entrylen;
+ unsigned char *sha1;
+ unsigned int mode;
+
+ /* Did we hit the end of the directory? Return how many we wrote */
+ if (baselen >= pathlen || memcmp(base, pathname, baselen))
+ break;
+
+ sha1 = ce->sha1;
+ mode = ntohl(ce->ce_mode);
+
+ /* Do we have _further_ subdirectories? */
+ filename = pathname + baselen;
+ dirname = strchr(filename, '/');
+ if (dirname) {
+ int subdir_written;
+
+ subdir_written = write_tree(cachep + nr, maxentries - nr, pathname, dirname-pathname+1, subdir_sha1);
+ nr += subdir_written;
+
+ /* Now we need to write out the directory entry into this tree.. */
+ mode = S_IFDIR;
+ pathlen = dirname - pathname;
+
+ /* ..but the directory entry doesn't count towards the total count */
+ nr--;
+ sha1 = subdir_sha1;
+ }
+
+ if (!missing_ok && check_valid_sha1(sha1) < 0)
+ exit(1);
+
+ entrylen = pathlen - baselen;
+ if (offset + entrylen + 100 > size) {
+ size = alloc_nr(offset + entrylen + 100);
+ buffer = xrealloc(buffer, size);
+ }
+ offset += sprintf(buffer + offset, "%o %.*s", mode, entrylen, filename);
+ buffer[offset++] = 0;
+ memcpy(buffer + offset, sha1, 20);
+ offset += 20;
+ nr++;
+ }
+
+ write_sha1_file(buffer, offset, tree_type, returnsha1);
+ free(buffer);
+ return nr;
}
-#define ORIG_OFFSET (40) /* Enough space to add the header of "tree <size>\0" */
+static const char write_tree_usage[] = "git-write-tree [--missing-ok]";
int main(int argc, char **argv)
{
- unsigned long size, offset;
- int i, entries = read_cache();
- char *buffer;
+ int i, funny;
+ int entries;
+ unsigned char sha1[20];
+
+ setup_git_directory();
- if (entries <= 0) {
- fprintf(stderr, "No file-cache to create a tree of\n");
- exit(1);
+ entries = read_cache();
+ if (argc == 2) {
+ if (!strcmp(argv[1], "--missing-ok"))
+ missing_ok = 1;
+ else
+ die(write_tree_usage);
}
+
+ if (argc > 2)
+ die("too many options");
- /* Guess at an initial size */
- size = entries * 40 + 400;
- buffer = malloc(size);
- offset = ORIG_OFFSET;
+ 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 (check_valid_sha1(ce->sha1) < 0)
- exit(1);
- if (offset + ce->namelen + 60 > size) {
- size = alloc_nr(offset + ce->namelen + 60);
- buffer = realloc(buffer, size);
+ if (ce_stage(ce)) {
+ if (10 < ++funny) {
+ fprintf(stderr, "...\n");
+ break;
+ }
+ fprintf(stderr, "%s: unmerged (%s)\n", ce->name, sha1_to_hex(ce->sha1));
}
- offset += sprintf(buffer + offset, "%o %s", ce->st_mode, ce->name);
- buffer[offset++] = 0;
- memcpy(buffer + offset, ce->sha1, 20);
- offset += 20;
}
+ if (funny)
+ die("git-write-tree: not able to write tree");
- i = prepend_integer(buffer, offset - ORIG_OFFSET, ORIG_OFFSET);
- i -= 5;
- memcpy(buffer+i, "tree ", 5);
-
- buffer += i;
- offset -= i;
+ /* 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");
- write_sha1_file(buffer, offset);
+ /* Ok, write it out */
+ if (write_tree(active_cache, entries, "", 0, sha1) != entries)
+ die("git-write-tree: internal error");
+ printf("%s\n", sha1_to_hex(sha1));
return 0;
}