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-rw-r--r--fast-import.c117
1 files changed, 84 insertions, 33 deletions
diff --git a/fast-import.c b/fast-import.c
index 1d5e3336a5..742e7da6b8 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;
@@ -284,6 +289,7 @@ static uintmax_t marks_set_count;
static uintmax_t object_count_by_type[1 << TYPE_BITS];
static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
static uintmax_t delta_count_by_type[1 << TYPE_BITS];
+static uintmax_t delta_count_attempts_by_type[1 << TYPE_BITS];
static unsigned long object_count;
static unsigned long branch_count;
static unsigned long branch_load_count;
@@ -304,6 +310,7 @@ static unsigned int atom_cnt;
static struct atom_str **atom_table;
/* The .pack file being generated */
+static struct pack_idx_option pack_idx_opts;
static unsigned int pack_id;
static struct sha1file *pack_file;
static struct packed_git *pack_data;
@@ -354,6 +361,7 @@ static unsigned int cmd_save = 100;
static uintmax_t next_mark;
static struct strbuf new_data = STRBUF_INIT;
static int seen_data_command;
+static int require_explicit_termination;
/* Signal handling */
static volatile sig_atomic_t checkpoint_requested;
@@ -896,7 +904,7 @@ static const char *create_index(void)
if (c != last)
die("internal consistency error creating the index");
- tmpfile = write_idx_file(NULL, idx, object_count, pack_data->sha1);
+ tmpfile = write_idx_file(NULL, idx, object_count, &pack_idx_opts, pack_data->sha1);
free(idx);
return tmpfile;
}
@@ -1043,6 +1051,7 @@ static int store_object(
}
if (last && last->data.buf && last->depth < max_depth && dat->len > 20) {
+ delta_count_attempts_by_type[type]++;
delta = diff_delta(last->data.buf, last->data.len,
dat->buf, dat->len,
&deltalen, dat->len - 20);
@@ -1414,8 +1423,9 @@ 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);
}
}
@@ -1425,7 +1435,7 @@ 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;
@@ -1435,7 +1445,8 @@ 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;
@@ -1469,6 +1480,7 @@ 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);
@@ -1513,6 +1525,23 @@ 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;
}
@@ -1967,32 +1996,41 @@ static int validate_raw_date(const char *src, char *result, int maxlen)
static char *parse_ident(const char *buf)
{
- const char *gt;
+ const char *ltgt;
size_t name_len;
char *ident;
- gt = strrchr(buf, '>');
- if (!gt)
+ /* ensure there is a space delimiter even if there is no name */
+ if (*buf == '<')
+ --buf;
+
+ ltgt = buf + strcspn(buf, "<>");
+ if (*ltgt != '<')
+ die("Missing < in ident string: %s", buf);
+ if (ltgt != buf && ltgt[-1] != ' ')
+ die("Missing space before < in ident string: %s", buf);
+ ltgt = ltgt + 1 + strcspn(ltgt + 1, "<>");
+ if (*ltgt != '>')
die("Missing > in ident string: %s", buf);
- gt++;
- if (*gt != ' ')
+ ltgt++;
+ if (*ltgt != ' ')
die("Missing space after > in ident string: %s", buf);
- gt++;
- name_len = gt - buf;
+ ltgt++;
+ name_len = ltgt - buf;
ident = xmalloc(name_len + 24);
strncpy(ident, buf, name_len);
switch (whenspec) {
case WHENSPEC_RAW:
- if (validate_raw_date(gt, ident + name_len, 24) < 0)
- die("Invalid raw date \"%s\" in ident: %s", gt, buf);
+ if (validate_raw_date(ltgt, ident + name_len, 24) < 0)
+ die("Invalid raw date \"%s\" in ident: %s", ltgt, buf);
break;
case WHENSPEC_RFC2822:
- if (parse_date(gt, ident + name_len, 24) < 0)
- die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf);
+ if (parse_date(ltgt, ident + name_len, 24) < 0)
+ die("Invalid rfc2822 date \"%s\" in ident: %s", ltgt, buf);
break;
case WHENSPEC_NOW:
- if (strcmp("now", gt))
+ if (strcmp("now", ltgt))
die("Date in ident must be 'now': %s", buf);
datestamp(ident + name_len, 24);
break;
@@ -2688,13 +2726,13 @@ static void parse_new_tag(void)
type = oe->type;
hashcpy(sha1, oe->idx.sha1);
} else if (!get_sha1(from, sha1)) {
- unsigned long size;
- char *buf;
-
- buf = read_sha1_file(sha1, &type, &size);
- if (!buf || size < 46)
- die("Not a valid commit: %s", from);
- free(buf);
+ struct object_entry *oe = find_object(sha1);
+ if (!oe) {
+ type = sha1_object_info(sha1, NULL);
+ if (type < 0)
+ die("Not a valid object: %s", from);
+ } else
+ type = oe->type;
} else
die("Invalid ref name or SHA1 expression: %s", from);
read_next_command();
@@ -2798,7 +2836,12 @@ static void cat_blob(struct object_entry *oe, unsigned char sha1[20])
strbuf_release(&line);
cat_blob_write(buf, size);
cat_blob_write("\n", 1);
- free(buf);
+ if (oe && oe->pack_id == pack_id) {
+ last_blob.offset = oe->idx.offset;
+ strbuf_attach(&last_blob.data, buf, size, size);
+ last_blob.depth = oe->depth;
+ } else
+ free(buf);
}
static void parse_cat_blob(void)
@@ -2927,7 +2970,7 @@ 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');
}
@@ -3139,6 +3182,8 @@ static int parse_one_feature(const char *feature, int from_stream)
relative_marks_paths = 1;
} else if (!strcmp(feature, "no-relative-marks")) {
relative_marks_paths = 0;
+ } else if (!strcmp(feature, "done")) {
+ require_explicit_termination = 1;
} else if (!strcmp(feature, "force")) {
force_update = 1;
} else if (!strcmp(feature, "notes") || !strcmp(feature, "ls")) {
@@ -3195,10 +3240,10 @@ static int git_pack_config(const char *k, const char *v, void *cb)
return 0;
}
if (!strcmp(k, "pack.indexversion")) {
- pack_idx_default_version = git_config_int(k, v);
- if (pack_idx_default_version > 2)
+ pack_idx_opts.version = git_config_int(k, v);
+ if (pack_idx_opts.version > 2)
die("bad pack.indexversion=%"PRIu32,
- pack_idx_default_version);
+ pack_idx_opts.version);
return 0;
}
if (!strcmp(k, "pack.packsizelimit")) {
@@ -3252,6 +3297,7 @@ int main(int argc, const char **argv)
usage(fast_import_usage);
setup_git_directory();
+ reset_pack_idx_option(&pack_idx_opts);
git_config(git_pack_config, NULL);
if (!pack_compression_seen && core_compression_seen)
pack_compression_level = core_compression_level;
@@ -3288,6 +3334,8 @@ int main(int argc, const char **argv)
parse_reset_branch();
else if (!strcmp("checkpoint", command_buf.buf))
parse_checkpoint();
+ else if (!strcmp("done", command_buf.buf))
+ break;
else if (!prefixcmp(command_buf.buf, "progress "))
parse_progress();
else if (!prefixcmp(command_buf.buf, "feature "))
@@ -3307,6 +3355,9 @@ int main(int argc, const char **argv)
if (!seen_data_command)
parse_argv();
+ if (require_explicit_termination && feof(stdin))
+ die("stream ends early");
+
end_packfile();
dump_branches();
@@ -3328,10 +3379,10 @@ int main(int argc, const char **argv)
fprintf(stderr, "---------------------------------------------------------------------\n");
fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count);
fprintf(stderr, "Total objects: %10" PRIuMAX " (%10" PRIuMAX " duplicates )\n", total_count, duplicate_count);
- fprintf(stderr, " blobs : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB]);
- fprintf(stderr, " trees : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE]);
- fprintf(stderr, " commits: %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT], delta_count_by_type[OBJ_COMMIT]);
- fprintf(stderr, " tags : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG], delta_count_by_type[OBJ_TAG]);
+ fprintf(stderr, " blobs : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB], delta_count_attempts_by_type[OBJ_BLOB]);
+ fprintf(stderr, " trees : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE], delta_count_attempts_by_type[OBJ_TREE]);
+ fprintf(stderr, " commits: %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT], delta_count_by_type[OBJ_COMMIT], delta_count_attempts_by_type[OBJ_COMMIT]);
+ fprintf(stderr, " tags : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG], delta_count_by_type[OBJ_TAG], delta_count_attempts_by_type[OBJ_TAG]);
fprintf(stderr, "Total branches: %10lu (%10lu loads )\n", branch_count, branch_load_count);
fprintf(stderr, " marks: %10" PRIuMAX " (%10" PRIuMAX " unique )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count);
fprintf(stderr, " atoms: %10u\n", atom_cnt);
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