ts ::= # time since the epoch in seconds, ascii base10 notation;
tz ::= # GIT style timezone;
- # note: comments may appear anywhere in the input, except
- # within a data command. Any form of the data command
- # always escapes the related input from comment processing.
+ # note: comments and cat requests may appear anywhere
+ # in the input, except within a data command. Any form
+ # of the data command always escapes the related input
+ # from comment processing.
#
# In case it is not clear, the '#' that starts the comment
# must be the first character on that line (an lf
# preceded it).
#
+ cat_blob ::= 'cat-blob' sp (hexsha1 | idnum) lf;
+
comment ::= '#' not_lf* lf;
not_lf ::= # Any byte that is not ASCII newline (LF);
*/
static struct strbuf new_data = STRBUF_INIT;
static int seen_data_command;
+/* Signal handling */
+static volatile sig_atomic_t checkpoint_requested;
+
+/* Where to write output of cat-blob commands */
+static int cat_blob_fd = STDOUT_FILENO;
+
static void parse_argv(void);
+static void parse_cat_blob(void);
static void write_branch_report(FILE *rpt, struct branch *b)
{
exit(128);
}
+#ifndef SIGUSR1 /* Windows, for example */
+
+static void set_checkpoint_signal(void)
+{
+}
+
+#else
+
+static void checkpoint_signal(int signo)
+{
+ checkpoint_requested = 1;
+}
+
+static void set_checkpoint_signal(void)
+{
+ struct sigaction sa;
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = checkpoint_signal;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGUSR1, &sa, NULL);
+}
+
+#endif
+
static void alloc_objects(unsigned int cnt)
{
struct object_entry_pool *b;
{
unsigned int h = sha1[0] << 8 | sha1[1];
struct object_entry *e = object_table[h];
- struct object_entry *p = NULL;
while (e) {
if (!hashcmp(sha1, e->idx.sha1))
return e;
- p = e;
e = e->next;
}
e = new_object(sha1);
- e->next = NULL;
+ e->next = object_table[h];
e->idx.offset = 0;
- if (p)
- p->next = e;
- else
- object_table[h] = e;
+ object_table[h] = e;
return e;
}
return EOF;
}
- do {
+ for (;;) {
if (unread_command_buf) {
unread_command_buf = 0;
} else {
rc->prev->next = rc;
cmd_tail = rc;
}
- } while (command_buf.buf[0] == '#');
-
- return 0;
+ if (!prefixcmp(command_buf.buf, "cat-blob ")) {
+ parse_cat_blob();
+ continue;
+ }
+ if (command_buf.buf[0] == '#')
+ continue;
+ return 0;
+ }
}
static void skip_optional_lf(void)
p = uq.buf;
}
+ /* Git does not track empty, non-toplevel directories. */
+ if (S_ISDIR(mode) && !memcmp(sha1, EMPTY_TREE_SHA1_BIN, 20) && *p) {
+ tree_content_remove(&b->branch_tree, p, NULL);
+ return;
+ }
+
if (S_ISGITLINK(mode)) {
if (inline_data)
die("Git links cannot be specified 'inline': %s",
unread_command_buf = 1;
}
-static void parse_checkpoint(void)
+static void cat_blob_write(const char *buf, unsigned long size)
+{
+ if (write_in_full(cat_blob_fd, buf, size) != size)
+ die_errno("Write to frontend failed");
+}
+
+static void cat_blob(struct object_entry *oe, unsigned char sha1[20])
+{
+ struct strbuf line = STRBUF_INIT;
+ unsigned long size;
+ enum object_type type = 0;
+ char *buf;
+
+ if (!oe || oe->pack_id == MAX_PACK_ID) {
+ buf = read_sha1_file(sha1, &type, &size);
+ } else {
+ type = oe->type;
+ buf = gfi_unpack_entry(oe, &size);
+ }
+
+ /*
+ * Output based on batch_one_object() from cat-file.c.
+ */
+ if (type <= 0) {
+ strbuf_reset(&line);
+ strbuf_addf(&line, "%s missing\n", sha1_to_hex(sha1));
+ cat_blob_write(line.buf, line.len);
+ strbuf_release(&line);
+ free(buf);
+ return;
+ }
+ if (!buf)
+ die("Can't read object %s", sha1_to_hex(sha1));
+ if (type != OBJ_BLOB)
+ die("Object %s is a %s but a blob was expected.",
+ sha1_to_hex(sha1), typename(type));
+ strbuf_reset(&line);
+ strbuf_addf(&line, "%s %s %lu\n", sha1_to_hex(sha1),
+ typename(type), size);
+ cat_blob_write(line.buf, line.len);
+ strbuf_release(&line);
+ cat_blob_write(buf, size);
+ cat_blob_write("\n", 1);
+ free(buf);
+}
+
+static void parse_cat_blob(void)
{
+ const char *p;
+ struct object_entry *oe = oe;
+ unsigned char sha1[20];
+
+ /* cat-blob SP <object> LF */
+ p = command_buf.buf + strlen("cat-blob ");
+ if (*p == ':') {
+ char *x;
+ oe = find_mark(strtoumax(p + 1, &x, 10));
+ if (x == p + 1)
+ die("Invalid mark: %s", command_buf.buf);
+ if (!oe)
+ die("Unknown mark: %s", command_buf.buf);
+ if (*x)
+ die("Garbage after mark: %s", command_buf.buf);
+ hashcpy(sha1, oe->idx.sha1);
+ } else {
+ if (get_sha1_hex(p, sha1))
+ die("Invalid SHA1: %s", command_buf.buf);
+ if (p[40])
+ die("Garbage after SHA1: %s", command_buf.buf);
+ oe = find_object(sha1);
+ }
+
+ cat_blob(oe, sha1);
+}
+
+static void checkpoint(void)
+{
+ checkpoint_requested = 0;
if (object_count) {
cycle_packfile();
dump_branches();
dump_tags();
dump_marks();
}
+}
+
+static void parse_checkpoint(void)
+{
+ checkpoint_requested = 1;
skip_optional_lf();
}
die("unknown --date-format argument %s", fmt);
}
+static unsigned long ulong_arg(const char *option, const char *arg)
+{
+ char *endptr;
+ unsigned long rv = strtoul(arg, &endptr, 0);
+ if (strchr(arg, '-') || endptr == arg || *endptr)
+ die("%s: argument must be a non-negative integer", option);
+ return rv;
+}
+
static void option_depth(const char *depth)
{
- max_depth = strtoul(depth, NULL, 0);
+ max_depth = ulong_arg("--depth", depth);
if (max_depth > MAX_DEPTH)
die("--depth cannot exceed %u", MAX_DEPTH);
}
static void option_active_branches(const char *branches)
{
- max_active_branches = strtoul(branches, NULL, 0);
+ max_active_branches = ulong_arg("--active-branches", branches);
}
static void option_export_marks(const char *marks)
safe_create_leading_directories_const(export_marks_file);
}
+static void option_cat_blob_fd(const char *fd)
+{
+ unsigned long n = ulong_arg("--cat-blob-fd", fd);
+ if (n > (unsigned long) INT_MAX)
+ die("--cat-blob-fd cannot exceed %d", INT_MAX);
+ cat_blob_fd = (int) n;
+}
+
static void option_export_pack_edges(const char *edges)
{
if (pack_edges)
option_import_marks(feature + 13, from_stream);
} else if (!prefixcmp(feature, "export-marks=")) {
option_export_marks(feature + 13);
+ } else if (!strcmp(feature, "cat-blob")) {
+ ; /* Don't die - this feature is supported */
} else if (!prefixcmp(feature, "relative-marks")) {
relative_marks_paths = 1;
} else if (!prefixcmp(feature, "no-relative-marks")) {
if (parse_one_feature(a + 2, 0))
continue;
+ if (!prefixcmp(a + 2, "cat-blob-fd=")) {
+ option_cat_blob_fd(a + 2 + strlen("cat-blob-fd="));
+ continue;
+ }
+
die("unknown option %s", a);
}
if (i != global_argc)
prepare_packed_git();
start_packfile();
set_die_routine(die_nicely);
+ set_checkpoint_signal();
while (read_next_command() != EOF) {
if (!strcmp("blob", command_buf.buf))
parse_new_blob();
/* ignore non-git options*/;
else
die("Unsupported command: %s", command_buf.buf);
+
+ if (checkpoint_requested)
+ checkpoint();
}
/* argv hasn't been parsed yet, do so */