diff options
Diffstat (limited to 'fast-import.c')
| -rw-r--r-- | fast-import.c | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/fast-import.c b/fast-import.c index 6d491b92fe..016d2456f6 100644 --- a/fast-import.c +++ b/fast-import.c @@ -170,6 +170,11 @@ Format of STDIN stream: #define DEPTH_BITS 13 #define MAX_DEPTH ((1<<DEPTH_BITS)-1) +/* + * We abuse the setuid bit on directories to mean "do not delta". + */ +#define NO_DELTA S_ISUID + struct object_entry { struct pack_idx_entry idx; struct object_entry *next; @@ -1416,8 +1421,9 @@ static void mktree(struct tree_content *t, int v, struct strbuf *b) struct tree_entry *e = t->entries[i]; if (!e->versions[v].mode) continue; - strbuf_addf(b, "%o %s%c", (unsigned int)e->versions[v].mode, - e->name->str_dat, '\0'); + strbuf_addf(b, "%o %s%c", + (unsigned int)(e->versions[v].mode & ~NO_DELTA), + e->name->str_dat, '\0'); strbuf_add(b, e->versions[v].sha1, 20); } } @@ -1427,7 +1433,7 @@ static void store_tree(struct tree_entry *root) struct tree_content *t = root->tree; unsigned int i, j, del; struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 }; - struct object_entry *le; + struct object_entry *le = NULL; if (!is_null_sha1(root->versions[1].sha1)) return; @@ -1437,7 +1443,8 @@ static void store_tree(struct tree_entry *root) store_tree(t->entries[i]); } - le = find_object(root->versions[0].sha1); + if (!(root->versions[0].mode & NO_DELTA)) + le = find_object(root->versions[0].sha1); if (S_ISDIR(root->versions[0].mode) && le && le->pack_id == pack_id) { mktree(t, 0, &old_tree); lo.data = old_tree; @@ -1471,6 +1478,7 @@ static void tree_content_replace( { if (!S_ISDIR(mode)) die("Root cannot be a non-directory"); + hashclr(root->versions[0].sha1); hashcpy(root->versions[1].sha1, sha1); if (root->tree) release_tree_content_recursive(root->tree); @@ -1515,6 +1523,23 @@ static int tree_content_set( if (e->tree) release_tree_content_recursive(e->tree); e->tree = subtree; + + /* + * We need to leave e->versions[0].sha1 alone + * to avoid modifying the preimage tree used + * when writing out the parent directory. + * But after replacing the subdir with a + * completely different one, it's not a good + * delta base any more, and besides, we've + * thrown away the tree entries needed to + * make a delta against it. + * + * So let's just explicitly disable deltas + * for the subtree. + */ + if (S_ISDIR(e->versions[0].mode)) + e->versions[0].mode |= NO_DELTA; + hashclr(root->versions[1].sha1); return 1; } @@ -2938,7 +2963,7 @@ static void print_ls(int mode, const unsigned char *sha1, const char *path) /* mode SP type SP object_name TAB path LF */ strbuf_reset(&line); strbuf_addf(&line, "%06o %s %s\t", - mode, type, sha1_to_hex(sha1)); + mode & ~NO_DELTA, type, sha1_to_hex(sha1)); quote_c_style(path, &line, NULL, 0); strbuf_addch(&line, '\n'); } |