summaryrefslogtreecommitdiff
path: root/upload-pack.c
diff options
context:
space:
mode:
Diffstat (limited to 'upload-pack.c')
-rw-r--r--upload-pack.c891
1 files changed, 775 insertions, 116 deletions
diff --git a/upload-pack.c b/upload-pack.c
index 95d3812051..43342ac161 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -1,185 +1,844 @@
#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
+#include "sideband.h"
+#include "tag.h"
+#include "object.h"
+#include "commit.h"
+#include "exec_cmd.h"
+#include "diff.h"
+#include "revision.h"
+#include "list-objects.h"
+#include "run-command.h"
+#include "connect.h"
+#include "sigchain.h"
+#include "version.h"
+#include "string-list.h"
-static const char upload_pack_usage[] = "git-upload-pack <dir>";
+static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>";
-#define MAX_HAS (16)
-#define MAX_NEEDS (256)
-static int nr_has = 0, nr_needs = 0;
-static unsigned char has_sha1[MAX_HAS][20];
-static unsigned char needs_sha1[MAX_NEEDS][20];
+/* bits #0..7 in revision.h, #8..10 in commit.c */
+#define THEY_HAVE (1u << 11)
+#define OUR_REF (1u << 12)
+#define WANTED (1u << 13)
+#define COMMON_KNOWN (1u << 14)
+#define REACHABLE (1u << 15)
-static int strip(char *line, int len)
+#define SHALLOW (1u << 16)
+#define NOT_SHALLOW (1u << 17)
+#define CLIENT_SHALLOW (1u << 18)
+#define HIDDEN_REF (1u << 19)
+
+static unsigned long oldest_have;
+
+static int multi_ack;
+static int no_done;
+static int use_thin_pack, use_ofs_delta, use_include_tag;
+static int no_progress, daemon_mode;
+static int allow_tip_sha1_in_want;
+static int shallow_nr;
+static struct object_array have_obj;
+static struct object_array want_obj;
+static struct object_array extra_edge_obj;
+static unsigned int timeout;
+static int keepalive = 5;
+/* 0 for no sideband,
+ * otherwise maximum packet size (up to 65520 bytes).
+ */
+static int use_sideband;
+static int advertise_refs;
+static int stateless_rpc;
+
+static void reset_timeout(void)
{
- if (len && line[len-1] == '\n')
- line[--len] = 0;
- return len;
+ alarm(timeout);
+}
+
+static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
+{
+ if (use_sideband)
+ return send_sideband(1, fd, data, sz, use_sideband);
+ if (fd == 3)
+ /* emergency quit */
+ fd = 2;
+ if (fd == 2) {
+ /* XXX: are we happy to lose stuff here? */
+ xwrite(fd, data, sz);
+ return sz;
+ }
+ write_or_die(fd, data, sz);
+ return sz;
}
static void create_pack_file(void)
{
- int fd[2];
- pid_t pid;
+ struct child_process pack_objects;
+ char data[8193], progress[128];
+ char abort_msg[] = "aborting due to possible repository "
+ "corruption on the remote side.";
+ int buffered = -1;
+ ssize_t sz;
+ const char *argv[12];
+ int i, arg = 0;
+ FILE *pipe_fd;
+ char *shallow_file = NULL;
- if (pipe(fd) < 0)
- die("git-upload-pack: unable to create pipe");
- pid = fork();
- if (pid < 0)
- die("git-upload-pack: unable to fork git-rev-list");
+ if (shallow_nr) {
+ shallow_file = setup_temporary_shallow();
+ argv[arg++] = "--shallow-file";
+ argv[arg++] = shallow_file;
+ }
+ argv[arg++] = "pack-objects";
+ argv[arg++] = "--revs";
+ if (use_thin_pack)
+ argv[arg++] = "--thin";
- if (!pid) {
- int i;
- int args = nr_has + nr_needs + 5;
- char **argv = xmalloc(args * sizeof(char *));
- char *buf = xmalloc(args * 45);
- char **p = argv;
-
- dup2(fd[1], 1);
- close(0);
- close(fd[0]);
- close(fd[1]);
- *p++ = "git-rev-list";
- *p++ = "--objects";
- for (i = 0; i < nr_needs; i++) {
- *p++ = buf;
- memcpy(buf, sha1_to_hex(needs_sha1[i]), 41);
- buf += 41;
- }
- for (i = 0; i < nr_has; i++) {
- *p++ = buf;
- *buf++ = '^';
- memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
- buf += 41;
- }
- *p++ = NULL;
- execvp("git-rev-list", argv);
- die("git-upload-pack: unable to exec git-rev-list");
- }
- dup2(fd[0], 0);
- close(fd[0]);
- close(fd[1]);
- execlp("git-pack-objects", "git-pack-objects", "--stdout", NULL);
- die("git-upload-pack: unable to exec git-pack-objects");
+ argv[arg++] = "--stdout";
+ if (!no_progress)
+ argv[arg++] = "--progress";
+ if (use_ofs_delta)
+ argv[arg++] = "--delta-base-offset";
+ if (use_include_tag)
+ argv[arg++] = "--include-tag";
+ argv[arg++] = NULL;
+
+ memset(&pack_objects, 0, sizeof(pack_objects));
+ pack_objects.in = -1;
+ pack_objects.out = -1;
+ pack_objects.err = -1;
+ pack_objects.git_cmd = 1;
+ pack_objects.argv = argv;
+
+ if (start_command(&pack_objects))
+ die("git upload-pack: unable to fork git-pack-objects");
+
+ pipe_fd = xfdopen(pack_objects.in, "w");
+
+ for (i = 0; i < want_obj.nr; i++)
+ fprintf(pipe_fd, "%s\n",
+ sha1_to_hex(want_obj.objects[i].item->sha1));
+ fprintf(pipe_fd, "--not\n");
+ for (i = 0; i < have_obj.nr; i++)
+ fprintf(pipe_fd, "%s\n",
+ sha1_to_hex(have_obj.objects[i].item->sha1));
+ for (i = 0; i < extra_edge_obj.nr; i++)
+ fprintf(pipe_fd, "%s\n",
+ sha1_to_hex(extra_edge_obj.objects[i].item->sha1));
+ fprintf(pipe_fd, "\n");
+ fflush(pipe_fd);
+ fclose(pipe_fd);
+
+ /* We read from pack_objects.err to capture stderr output for
+ * progress bar, and pack_objects.out to capture the pack data.
+ */
+
+ while (1) {
+ struct pollfd pfd[2];
+ int pe, pu, pollsize;
+ int ret;
+
+ reset_timeout();
+
+ pollsize = 0;
+ pe = pu = -1;
+
+ if (0 <= pack_objects.out) {
+ pfd[pollsize].fd = pack_objects.out;
+ pfd[pollsize].events = POLLIN;
+ pu = pollsize;
+ pollsize++;
+ }
+ if (0 <= pack_objects.err) {
+ pfd[pollsize].fd = pack_objects.err;
+ pfd[pollsize].events = POLLIN;
+ pe = pollsize;
+ pollsize++;
+ }
+
+ if (!pollsize)
+ break;
+
+ ret = poll(pfd, pollsize, 1000 * keepalive);
+ if (ret < 0) {
+ if (errno != EINTR) {
+ error("poll failed, resuming: %s",
+ strerror(errno));
+ sleep(1);
+ }
+ continue;
+ }
+ if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
+ /* Status ready; we ship that in the side-band
+ * or dump to the standard error.
+ */
+ sz = xread(pack_objects.err, progress,
+ sizeof(progress));
+ if (0 < sz)
+ send_client_data(2, progress, sz);
+ else if (sz == 0) {
+ close(pack_objects.err);
+ pack_objects.err = -1;
+ }
+ else
+ goto fail;
+ /* give priority to status messages */
+ continue;
+ }
+ if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
+ /* Data ready; we keep the last byte to ourselves
+ * in case we detect broken rev-list, so that we
+ * can leave the stream corrupted. This is
+ * unfortunate -- unpack-objects would happily
+ * accept a valid packdata with trailing garbage,
+ * so appending garbage after we pass all the
+ * pack data is not good enough to signal
+ * breakage to downstream.
+ */
+ char *cp = data;
+ ssize_t outsz = 0;
+ if (0 <= buffered) {
+ *cp++ = buffered;
+ outsz++;
+ }
+ sz = xread(pack_objects.out, cp,
+ sizeof(data) - outsz);
+ if (0 < sz)
+ ;
+ else if (sz == 0) {
+ close(pack_objects.out);
+ pack_objects.out = -1;
+ }
+ else
+ goto fail;
+ sz += outsz;
+ if (1 < sz) {
+ buffered = data[sz-1] & 0xFF;
+ sz--;
+ }
+ else
+ buffered = -1;
+ sz = send_client_data(1, data, sz);
+ if (sz < 0)
+ goto fail;
+ }
+
+ /*
+ * We hit the keepalive timeout without saying anything; send
+ * an empty message on the data sideband just to let the other
+ * side know we're still working on it, but don't have any data
+ * yet.
+ *
+ * If we don't have a sideband channel, there's no room in the
+ * protocol to say anything, so those clients are just out of
+ * luck.
+ */
+ if (!ret && use_sideband) {
+ static const char buf[] = "0005\1";
+ write_or_die(1, buf, 5);
+ }
+ }
+
+ if (finish_command(&pack_objects)) {
+ error("git upload-pack: git-pack-objects died with error.");
+ goto fail;
+ }
+ if (shallow_file) {
+ if (*shallow_file)
+ unlink(shallow_file);
+ free(shallow_file);
+ }
+
+ /* flush the data */
+ if (0 <= buffered) {
+ data[0] = buffered;
+ sz = send_client_data(1, data, 1);
+ if (sz < 0)
+ goto fail;
+ fprintf(stderr, "flushed.\n");
+ }
+ if (use_sideband)
+ packet_flush(1);
+ return;
+
+ fail:
+ send_client_data(3, abort_msg, sizeof(abort_msg));
+ die("git upload-pack: %s", abort_msg);
}
static int got_sha1(char *hex, unsigned char *sha1)
{
- int nr;
+ struct object *o;
+ int we_knew_they_have = 0;
+
if (get_sha1_hex(hex, sha1))
- die("git-upload-pack: expected SHA1 object, got '%s'", hex);
+ die("git upload-pack: expected SHA1 object, got '%s'", hex);
if (!has_sha1_file(sha1))
+ return -1;
+
+ o = parse_object(sha1);
+ if (!o)
+ die("oops (%s)", sha1_to_hex(sha1));
+ if (o->type == OBJ_COMMIT) {
+ struct commit_list *parents;
+ struct commit *commit = (struct commit *)o;
+ if (o->flags & THEY_HAVE)
+ we_knew_they_have = 1;
+ else
+ o->flags |= THEY_HAVE;
+ if (!oldest_have || (commit->date < oldest_have))
+ oldest_have = commit->date;
+ for (parents = commit->parents;
+ parents;
+ parents = parents->next)
+ parents->item->object.flags |= THEY_HAVE;
+ }
+ if (!we_knew_they_have) {
+ add_object_array(o, NULL, &have_obj);
+ return 1;
+ }
+ return 0;
+}
+
+static int reachable(struct commit *want)
+{
+ struct commit_list *work = NULL;
+
+ commit_list_insert_by_date(want, &work);
+ while (work) {
+ struct commit_list *list = work->next;
+ struct commit *commit = work->item;
+ free(work);
+ work = list;
+
+ if (commit->object.flags & THEY_HAVE) {
+ want->object.flags |= COMMON_KNOWN;
+ break;
+ }
+ if (!commit->object.parsed)
+ parse_object(commit->object.sha1);
+ if (commit->object.flags & REACHABLE)
+ continue;
+ commit->object.flags |= REACHABLE;
+ if (commit->date < oldest_have)
+ continue;
+ for (list = commit->parents; list; list = list->next) {
+ struct commit *parent = list->item;
+ if (!(parent->object.flags & REACHABLE))
+ commit_list_insert_by_date(parent, &work);
+ }
+ }
+ want->object.flags |= REACHABLE;
+ clear_commit_marks(want, REACHABLE);
+ free_commit_list(work);
+ return (want->object.flags & COMMON_KNOWN);
+}
+
+static int ok_to_give_up(void)
+{
+ int i;
+
+ if (!have_obj.nr)
return 0;
- nr = nr_has;
- if (nr < MAX_HAS) {
- memcpy(has_sha1[nr], sha1, 20);
- nr_has = nr+1;
+
+ for (i = 0; i < want_obj.nr; i++) {
+ struct object *want = want_obj.objects[i].item;
+
+ if (want->flags & COMMON_KNOWN)
+ continue;
+ want = deref_tag(want, "a want line", 0);
+ if (!want || want->type != OBJ_COMMIT) {
+ /* no way to tell if this is reachable by
+ * looking at the ancestry chain alone, so
+ * leave a note to ourselves not to worry about
+ * this object anymore.
+ */
+ want_obj.objects[i].item->flags |= COMMON_KNOWN;
+ continue;
+ }
+ if (!reachable((struct commit *)want))
+ return 0;
}
return 1;
}
static int get_common_commits(void)
{
- static char line[1000];
unsigned char sha1[20];
- int len;
+ char last_hex[41];
+ int got_common = 0;
+ int got_other = 0;
+ int sent_ready = 0;
- for(;;) {
- len = packet_read_line(0, line, sizeof(line));
+ save_commit_buffer = 0;
- if (!len) {
- packet_write(1, "NAK\n");
+ for (;;) {
+ char *line = packet_read_line(0, NULL);
+ reset_timeout();
+
+ if (!line) {
+ if (multi_ack == 2 && got_common
+ && !got_other && ok_to_give_up()) {
+ sent_ready = 1;
+ packet_write(1, "ACK %s ready\n", last_hex);
+ }
+ if (have_obj.nr == 0 || multi_ack)
+ packet_write(1, "NAK\n");
+
+ if (no_done && sent_ready) {
+ packet_write(1, "ACK %s\n", last_hex);
+ return 0;
+ }
+ if (stateless_rpc)
+ exit(0);
+ got_common = 0;
+ got_other = 0;
continue;
}
- len = strip(line, len);
- if (!strncmp(line, "have ", 5)) {
- if (got_sha1(line+5, sha1)) {
- packet_write(1, "ACK %s\n", sha1_to_hex(sha1));
+ if (!prefixcmp(line, "have ")) {
+ switch (got_sha1(line+5, sha1)) {
+ case -1: /* they have what we do not */
+ got_other = 1;
+ if (multi_ack && ok_to_give_up()) {
+ const char *hex = sha1_to_hex(sha1);
+ if (multi_ack == 2) {
+ sent_ready = 1;
+ packet_write(1, "ACK %s ready\n", hex);
+ } else
+ packet_write(1, "ACK %s continue\n", hex);
+ }
+ break;
+ default:
+ got_common = 1;
+ memcpy(last_hex, sha1_to_hex(sha1), 41);
+ if (multi_ack == 2)
+ packet_write(1, "ACK %s common\n", last_hex);
+ else if (multi_ack)
+ packet_write(1, "ACK %s continue\n", last_hex);
+ else if (have_obj.nr == 1)
+ packet_write(1, "ACK %s\n", last_hex);
break;
}
continue;
}
if (!strcmp(line, "done")) {
+ if (have_obj.nr > 0) {
+ if (multi_ack)
+ packet_write(1, "ACK %s\n", last_hex);
+ return 0;
+ }
packet_write(1, "NAK\n");
return -1;
}
- die("git-upload-pack: expected SHA1 list, got '%s'", line);
+ die("git upload-pack: expected SHA1 list, got '%s'", line);
}
+}
- for (;;) {
- len = packet_read_line(0, line, sizeof(line));
- if (!len)
+static int is_our_ref(struct object *o)
+{
+ return o->flags &
+ ((allow_tip_sha1_in_want ? HIDDEN_REF : 0) | OUR_REF);
+}
+
+static void check_non_tip(void)
+{
+ static const char *argv[] = {
+ "rev-list", "--stdin", NULL,
+ };
+ static struct child_process cmd;
+ struct object *o;
+ char namebuf[42]; /* ^ + SHA-1 + LF */
+ int i;
+
+ /* In the normal in-process case non-tip request can never happen */
+ if (!stateless_rpc)
+ goto error;
+
+ cmd.argv = argv;
+ cmd.git_cmd = 1;
+ cmd.no_stderr = 1;
+ cmd.in = -1;
+ cmd.out = -1;
+
+ if (start_command(&cmd))
+ goto error;
+
+ /*
+ * If rev-list --stdin encounters an unknown commit, it
+ * terminates, which will cause SIGPIPE in the write loop
+ * below.
+ */
+ sigchain_push(SIGPIPE, SIG_IGN);
+
+ namebuf[0] = '^';
+ namebuf[41] = '\n';
+ for (i = get_max_object_index(); 0 < i; ) {
+ o = get_indexed_object(--i);
+ if (!o)
continue;
- len = strip(line, len);
- if (!strncmp(line, "have ", 5)) {
- got_sha1(line+5, sha1);
+ if (!is_our_ref(o))
continue;
- }
- if (!strcmp(line, "done"))
- break;
- die("git-upload-pack: expected SHA1 list, got '%s'", line);
+ memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40);
+ if (write_in_full(cmd.in, namebuf, 42) < 0)
+ goto error;
+ }
+ namebuf[40] = '\n';
+ for (i = 0; i < want_obj.nr; i++) {
+ o = want_obj.objects[i].item;
+ if (is_our_ref(o))
+ continue;
+ memcpy(namebuf, sha1_to_hex(o->sha1), 40);
+ if (write_in_full(cmd.in, namebuf, 41) < 0)
+ goto error;
+ }
+ close(cmd.in);
+
+ sigchain_pop(SIGPIPE);
+
+ /*
+ * The commits out of the rev-list are not ancestors of
+ * our ref.
+ */
+ i = read_in_full(cmd.out, namebuf, 1);
+ if (i)
+ goto error;
+ close(cmd.out);
+
+ /*
+ * rev-list may have died by encountering a bad commit
+ * in the history, in which case we do want to bail out
+ * even when it showed no commit.
+ */
+ if (finish_command(&cmd))
+ goto error;
+
+ /* All the non-tip ones are ancestors of what we advertised */
+ return;
+
+error:
+ /* Pick one of them (we know there at least is one) */
+ for (i = 0; i < want_obj.nr; i++) {
+ o = want_obj.objects[i].item;
+ if (!is_our_ref(o))
+ die("git upload-pack: not our ref %s",
+ sha1_to_hex(o->sha1));
}
- return 0;
}
-static int receive_needs(void)
+static void receive_needs(void)
{
- static char line[1000];
- int len, needs;
+ struct object_array shallows = OBJECT_ARRAY_INIT;
+ int depth = 0;
+ int has_non_tip = 0;
- needs = 0;
+ shallow_nr = 0;
for (;;) {
- len = packet_read_line(0, line, sizeof(line));
- if (!len)
- return needs;
+ struct object *o;
+ const char *features;
+ unsigned char sha1_buf[20];
+ char *line = packet_read_line(0, NULL);
+ reset_timeout();
+ if (!line)
+ break;
- /*
- * This is purely theoretical right now: git-fetch-pack only
- * ever asks for a single HEAD
- */
- if (needs >= MAX_NEEDS)
- die("I'm only doing a max of %d requests", MAX_NEEDS);
- if (strncmp("want ", line, 5) || get_sha1_hex(line+5, needs_sha1[needs]))
- die("git-upload-pack: protocol error, expected to get sha, not '%s'", line);
- needs++;
+ if (!prefixcmp(line, "shallow ")) {
+ unsigned char sha1[20];
+ struct object *object;
+ if (get_sha1_hex(line + 8, sha1))
+ die("invalid shallow line: %s", line);
+ object = parse_object(sha1);
+ if (!object)
+ continue;
+ if (object->type != OBJ_COMMIT)
+ die("invalid shallow object %s", sha1_to_hex(sha1));
+ if (!(object->flags & CLIENT_SHALLOW)) {
+ object->flags |= CLIENT_SHALLOW;
+ add_object_array(object, NULL, &shallows);
+ }
+ continue;
+ }
+ if (!prefixcmp(line, "deepen ")) {
+ char *end;
+ depth = strtol(line + 7, &end, 0);
+ if (end == line + 7 || depth <= 0)
+ die("Invalid deepen: %s", line);
+ continue;
+ }
+ if (prefixcmp(line, "want ") ||
+ get_sha1_hex(line+5, sha1_buf))
+ die("git upload-pack: protocol error, "
+ "expected to get sha, not '%s'", line);
+
+ features = line + 45;
+
+ if (parse_feature_request(features, "multi_ack_detailed"))
+ multi_ack = 2;
+ else if (parse_feature_request(features, "multi_ack"))
+ multi_ack = 1;
+ if (parse_feature_request(features, "no-done"))
+ no_done = 1;
+ if (parse_feature_request(features, "thin-pack"))
+ use_thin_pack = 1;
+ if (parse_feature_request(features, "ofs-delta"))
+ use_ofs_delta = 1;
+ if (parse_feature_request(features, "side-band-64k"))
+ use_sideband = LARGE_PACKET_MAX;
+ else if (parse_feature_request(features, "side-band"))
+ use_sideband = DEFAULT_PACKET_MAX;
+ if (parse_feature_request(features, "no-progress"))
+ no_progress = 1;
+ if (parse_feature_request(features, "include-tag"))
+ use_include_tag = 1;
+
+ o = parse_object(sha1_buf);
+ if (!o)
+ die("git upload-pack: not our ref %s",
+ sha1_to_hex(sha1_buf));
+ if (!(o->flags & WANTED)) {
+ o->flags |= WANTED;
+ if (!is_our_ref(o))
+ has_non_tip = 1;
+ add_object_array(o, NULL, &want_obj);
+ }
}
+
+ /*
+ * We have sent all our refs already, and the other end
+ * should have chosen out of them. When we are operating
+ * in the stateless RPC mode, however, their choice may
+ * have been based on the set of older refs advertised
+ * by another process that handled the initial request.
+ */
+ if (has_non_tip)
+ check_non_tip();
+
+ if (!use_sideband && daemon_mode)
+ no_progress = 1;
+
+ if (depth == 0 && shallows.nr == 0)
+ return;
+ if (depth > 0) {
+ struct commit_list *result = NULL, *backup = NULL;
+ int i;
+ if (depth == INFINITE_DEPTH)
+ for (i = 0; i < shallows.nr; i++) {
+ struct object *object = shallows.objects[i].item;
+ object->flags |= NOT_SHALLOW;
+ }
+ else
+ backup = result =
+ get_shallow_commits(&want_obj, depth,
+ SHALLOW, NOT_SHALLOW);
+ while (result) {
+ struct object *object = &result->item->object;
+ if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
+ packet_write(1, "shallow %s",
+ sha1_to_hex(object->sha1));
+ register_shallow(object->sha1);
+ shallow_nr++;
+ }
+ result = result->next;
+ }
+ free_commit_list(backup);
+ for (i = 0; i < shallows.nr; i++) {
+ struct object *object = shallows.objects[i].item;
+ if (object->flags & NOT_SHALLOW) {
+ struct commit_list *parents;
+ packet_write(1, "unshallow %s",
+ sha1_to_hex(object->sha1));
+ object->flags &= ~CLIENT_SHALLOW;
+ /* make sure the real parents are parsed */
+ unregister_shallow(object->sha1);
+ object->parsed = 0;
+ if (parse_commit((struct commit *)object))
+ die("invalid commit");
+ parents = ((struct commit *)object)->parents;
+ while (parents) {
+ add_object_array(&parents->item->object,
+ NULL, &want_obj);
+ parents = parents->next;
+ }
+ add_object_array(object, NULL, &extra_edge_obj);
+ }
+ /* make sure commit traversal conforms to client */
+ register_shallow(object->sha1);
+ }
+ packet_flush(1);
+ } else
+ if (shallows.nr > 0) {
+ int i;
+ for (i = 0; i < shallows.nr; i++)
+ register_shallow(shallows.objects[i].item->sha1);
+ }
+
+ shallow_nr += shallows.nr;
+ free(shallows.objects);
}
-static int send_ref(const char *refname, const unsigned char *sha1)
+/* return non-zero if the ref is hidden, otherwise 0 */
+static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
{
- packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
+ struct object *o = lookup_unknown_object(sha1);
+
+ if (ref_is_hidden(refname)) {
+ o->flags |= HIDDEN_REF;
+ return 1;
+ }
+ if (!o)
+ die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
+ o->flags |= OUR_REF;
return 0;
}
-static int upload_pack(void)
+static void format_symref_info(struct strbuf *buf, struct string_list *symref)
+{
+ struct string_list_item *item;
+
+ if (!symref->nr)
+ return;
+ for_each_string_list_item(item, symref)
+ strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
+}
+
+static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
{
- head_ref(send_ref);
- for_each_ref(send_ref);
- packet_flush(1);
- nr_needs = receive_needs();
- if (!nr_needs)
+ static const char *capabilities = "multi_ack thin-pack side-band"
+ " side-band-64k ofs-delta shallow no-progress"
+ " include-tag multi_ack_detailed";
+ const char *refname_nons = strip_namespace(refname);
+ unsigned char peeled[20];
+
+ if (mark_our_ref(refname, sha1, flag, NULL))
return 0;
- get_common_commits();
- create_pack_file();
+
+ if (capabilities) {
+ struct strbuf symref_info = STRBUF_INIT;
+
+ format_symref_info(&symref_info, cb_data);
+ packet_write(1, "%s %s%c%s%s%s%s agent=%s\n",
+ sha1_to_hex(sha1), refname_nons,
+ 0, capabilities,
+ allow_tip_sha1_in_want ? " allow-tip-sha1-in-want" : "",
+ stateless_rpc ? " no-done" : "",
+ symref_info.buf,
+ git_user_agent_sanitized());
+ strbuf_release(&symref_info);
+ } else {
+ packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons);
+ }
+ capabilities = NULL;
+ if (!peel_ref(refname, peeled))
+ packet_write(1, "%s %s^{}\n", sha1_to_hex(peeled), refname_nons);
return 0;
}
+static int find_symref(const char *refname, const unsigned char *sha1, int flag,
+ void *cb_data)
+{
+ const char *symref_target;
+ struct string_list_item *item;
+ unsigned char unused[20];
+
+ if ((flag & REF_ISSYMREF) == 0)
+ return 0;
+ symref_target = resolve_ref_unsafe(refname, unused, 0, &flag);
+ if (!symref_target || (flag & REF_ISSYMREF) == 0)
+ die("'%s' is a symref but it is not?", refname);
+ item = string_list_append(cb_data, refname);
+ item->util = xstrdup(symref_target);
+ return 0;
+}
+
+static void upload_pack(void)
+{
+ struct string_list symref = STRING_LIST_INIT_DUP;
+
+ head_ref_namespaced(find_symref, &symref);
+ for_each_namespaced_ref(find_symref, &symref);
+
+ if (advertise_refs || !stateless_rpc) {
+ reset_timeout();
+ head_ref_namespaced(send_ref, &symref);
+ for_each_namespaced_ref(send_ref, &symref);
+ packet_flush(1);
+ } else {
+ head_ref_namespaced(mark_our_ref, NULL);
+ for_each_namespaced_ref(mark_our_ref, NULL);
+ }
+ string_list_clear(&symref, 1);
+ if (advertise_refs)
+ return;
+
+ receive_needs();
+ if (want_obj.nr) {
+ get_common_commits();
+ create_pack_file();
+ }
+}
+
+static int upload_pack_config(const char *var, const char *value, void *unused)
+{
+ if (!strcmp("uploadpack.allowtipsha1inwant", var))
+ allow_tip_sha1_in_want = git_config_bool(var, value);
+ else if (!strcmp("uploadpack.keepalive", var)) {
+ keepalive = git_config_int(var, value);
+ if (!keepalive)
+ keepalive = -1;
+ }
+ return parse_hide_refs_config(var, value, "uploadpack");
+}
+
int main(int argc, char **argv)
{
- const char *dir;
- if (argc != 2)
- usage(upload_pack_usage);
- dir = argv[1];
+ char *dir;
+ int i;
+ int strict = 0;
+
+ git_setup_gettext();
- /* chdir to the directory. If that fails, try appending ".git" */
- if (chdir(dir) < 0) {
- if (chdir(mkpath("%s.git", dir)) < 0)
- die("git-upload-pack unable to chdir to %s", dir);
+ packet_trace_identity("upload-pack");
+ git_extract_argv0_path(argv[0]);
+ read_replace_refs = 0;
+
+ for (i = 1; i < argc; i++) {
+ char *arg = argv[i];
+
+ if (arg[0] != '-')
+ break;
+ if (!strcmp(arg, "--advertise-refs")) {
+ advertise_refs = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--stateless-rpc")) {
+ stateless_rpc = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--strict")) {
+ strict = 1;
+ continue;
+ }
+ if (!prefixcmp(arg, "--timeout=")) {
+ timeout = atoi(arg+10);
+ daemon_mode = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--")) {
+ i++;
+ break;
+ }
}
- chdir(".git");
- if (access("objects", X_OK) || access("refs", X_OK))
- die("git-upload-pack: %s doesn't seem to be a git archive", dir);
- setenv("GIT_DIR", ".", 1);
+
+ if (i != argc-1)
+ usage(upload_pack_usage);
+
+ setup_path();
+
+ dir = argv[i];
+
+ if (!enter_repo(dir, strict))
+ die("'%s' does not appear to be a git repository", dir);
+ if (is_repository_shallow())
+ die("attempt to fetch/clone from a shallow repository");
+ git_config(upload_pack_config, NULL);
upload_pack();
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 07:30:54 +0000