#define DEPTH_BITS 13
#define MAX_DEPTH ((1<<DEPTH_BITS)-1)
-struct object_entry
-{
+/*
+ * 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;
uint32_t type : TYPE_BITS,
depth : DEPTH_BITS;
};
-struct object_entry_pool
-{
+struct object_entry_pool {
struct object_entry_pool *next_pool;
struct object_entry *next_free;
struct object_entry *end;
struct object_entry entries[FLEX_ARRAY]; /* more */
};
-struct mark_set
-{
+struct mark_set {
union {
struct object_entry *marked[1024];
struct mark_set *sets[1024];
unsigned int shift;
};
-struct last_object
-{
+struct last_object {
struct strbuf data;
off_t offset;
unsigned int depth;
unsigned no_swap : 1;
};
-struct mem_pool
-{
+struct mem_pool {
struct mem_pool *next_pool;
char *next_free;
char *end;
uintmax_t space[FLEX_ARRAY]; /* more */
};
-struct atom_str
-{
+struct atom_str {
struct atom_str *next_atom;
unsigned short str_len;
char str_dat[FLEX_ARRAY]; /* more */
};
struct tree_content;
-struct tree_entry
-{
+struct tree_entry {
struct tree_content *tree;
struct atom_str *name;
- struct tree_entry_ms
- {
+ struct tree_entry_ms {
uint16_t mode;
unsigned char sha1[20];
} versions[2];
};
-struct tree_content
-{
+struct tree_content {
unsigned int entry_capacity; /* must match avail_tree_content */
unsigned int entry_count;
unsigned int delta_depth;
struct tree_entry *entries[FLEX_ARRAY]; /* more */
};
-struct avail_tree_content
-{
+struct avail_tree_content {
unsigned int entry_capacity; /* must match tree_content */
struct avail_tree_content *next_avail;
};
-struct branch
-{
+struct branch {
struct branch *table_next_branch;
struct branch *active_next_branch;
const char *name;
unsigned char sha1[20];
};
-struct tag
-{
+struct tag {
struct tag *next_tag;
const char *name;
unsigned int pack_id;
unsigned char sha1[20];
};
-struct hash_list
-{
+struct hash_list {
struct hash_list *next;
unsigned char sha1[20];
};
WHENSPEC_NOW
} whenspec_type;
-struct recent_command
-{
+struct recent_command {
struct recent_command *prev;
struct recent_command *next;
char *buf;
/* Configured limits on output */
static unsigned long max_depth = 10;
static off_t max_packsize;
-static uintmax_t big_file_threshold = 512 * 1024 * 1024;
static int force_update;
static int pack_compression_level = Z_DEFAULT_COMPRESSION;
static int pack_compression_seen;
p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2);
strcpy(p->pack_name, tmpfile);
p->pack_fd = pack_fd;
+ p->do_not_close = 1;
pack_file = sha1fd(pack_fd, p->pack_name);
hdr.hdr_signature = htonl(PACK_SIGNATURE);
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);
}
}
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;
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;
{
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);
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;
}
/* 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');
}
{
const char *p;
struct tree_entry *root = NULL;
- struct tree_entry leaf = {0};
+ struct tree_entry leaf = {NULL};
/* ls SP (<treeish> SP)? <path> */
p = command_buf.buf + strlen("ls ");
option_export_marks(feature + 13);
} else if (!strcmp(feature, "cat-blob")) {
; /* Don't die - this feature is supported */
- } else if (!prefixcmp(feature, "relative-marks")) {
+ } else if (!strcmp(feature, "relative-marks")) {
relative_marks_paths = 1;
- } else if (!prefixcmp(feature, "no-relative-marks")) {
+ } else if (!strcmp(feature, "no-relative-marks")) {
relative_marks_paths = 0;
- } else if (!prefixcmp(feature, "force")) {
+ } else if (!strcmp(feature, "force")) {
force_update = 1;
} else if (!strcmp(feature, "notes") || !strcmp(feature, "ls")) {
; /* do nothing; we have the feature */
max_packsize = git_config_ulong(k, v);
return 0;
}
- if (!strcmp(k, "core.bigfilethreshold")) {
- long n = git_config_int(k, v);
- big_file_threshold = 0 < n ? n : 0;
- }
return git_default_config(k, v, cb);
}