#include "revision.h"
#include "list-objects.h"
#include "run-command.h"
+#include "sigchain.h"
+#include "version.h"
+#include "string-list.h"
-static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=nn] <dir>";
+static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>";
/* bits #0..7 in revision.h, #8..10 in commit.c */
#define THEY_HAVE (1u << 11)
#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, nr_our_refs;
+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;
* otherwise maximum packet size (up to 65520 bytes).
*/
static int use_sideband;
-static int debug_fd;
static int advertise_refs;
static int stateless_rpc;
alarm(timeout);
}
-static int strip(char *line, int len)
-{
- if (len && line[len-1] == '\n')
- line[--len] = 0;
- return len;
-}
-
static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
{
if (use_sideband)
xwrite(fd, data, sz);
return sz;
}
- return safe_write(fd, data, sz);
+ write_or_die(fd, data, sz);
+ return sz;
}
static FILE *pack_pipe = NULL;
commit->buffer = NULL;
}
-static void show_object(struct object *obj, const struct name_path *path, const char *component)
+static void show_object(struct object *obj,
+ const struct name_path *path, const char *component,
+ void *cb_data)
{
- /* An object with name "foo\n0000000..." can be used to
- * confuse downstream git-pack-objects very badly.
- */
- const char *name = path_name(path, component);
- const char *ep = strchr(name, '\n');
- if (ep) {
- fprintf(pack_pipe, "%s %.*s\n", sha1_to_hex(obj->sha1),
- (int) (ep - name),
- name);
- }
- else
- fprintf(pack_pipe, "%s %s\n",
- sha1_to_hex(obj->sha1), name);
- free((char *)name);
+ show_object_with_name(pack_pipe, obj, path, component);
}
static void show_edge(struct commit *commit)
fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1));
}
-static int do_rev_list(int in, int out, void *create_full_pack)
+static int do_rev_list(int in, int out, void *user_data)
{
int i;
struct rev_info revs;
if (use_thin_pack)
revs.edge_hint = 1;
- if (create_full_pack) {
- const char *args[] = {"rev-list", "--all", NULL};
- setup_revisions(2, args, &revs, NULL);
- } else {
- for (i = 0; i < want_obj.nr; i++) {
- struct object *o = want_obj.objects[i].item;
- /* why??? */
- o->flags &= ~UNINTERESTING;
- add_pending_object(&revs, o, NULL);
- }
- for (i = 0; i < have_obj.nr; i++) {
- struct object *o = have_obj.objects[i].item;
- o->flags |= UNINTERESTING;
- add_pending_object(&revs, o, NULL);
- }
- setup_revisions(0, NULL, &revs, NULL);
+ for (i = 0; i < want_obj.nr; i++) {
+ struct object *o = want_obj.objects[i].item;
+ /* why??? */
+ o->flags &= ~UNINTERESTING;
+ add_pending_object(&revs, o, NULL);
+ }
+ for (i = 0; i < have_obj.nr; i++) {
+ struct object *o = have_obj.objects[i].item;
+ o->flags |= UNINTERESTING;
+ add_pending_object(&revs, o, NULL);
}
+ setup_revisions(0, NULL, &revs, NULL);
if (prepare_revision_walk(&revs))
die("revision walk setup failed");
mark_edges_uninteresting(revs.commits, &revs, show_edge);
{
struct async rev_list;
struct child_process pack_objects;
- int create_full_pack = (nr_our_refs == want_obj.nr && !have_obj.nr);
char data[8193], progress[128];
char abort_msg[] = "aborting due to possible repository "
"corruption on the remote side.";
const char *argv[10];
int arg = 0;
- if (shallow_nr) {
- memset(&rev_list, 0, sizeof(rev_list));
- rev_list.proc = do_rev_list;
- rev_list.out = -1;
- if (start_async(&rev_list))
- die("git upload-pack: unable to fork git-rev-list");
- argv[arg++] = "pack-objects";
- } else {
- argv[arg++] = "pack-objects";
+ argv[arg++] = "pack-objects";
+ if (!shallow_nr) {
argv[arg++] = "--revs";
- if (create_full_pack)
- argv[arg++] = "--all";
- else if (use_thin_pack)
+ if (use_thin_pack)
argv[arg++] = "--thin";
}
argv[arg++] = NULL;
memset(&pack_objects, 0, sizeof(pack_objects));
- pack_objects.in = shallow_nr ? rev_list.out : -1;
+ pack_objects.in = -1;
pack_objects.out = -1;
pack_objects.err = -1;
pack_objects.git_cmd = 1;
if (start_command(&pack_objects))
die("git upload-pack: unable to fork git-pack-objects");
- /* pass on revisions we (don't) want */
- if (!shallow_nr) {
+ if (shallow_nr) {
+ memset(&rev_list, 0, sizeof(rev_list));
+ rev_list.proc = do_rev_list;
+ rev_list.out = pack_objects.in;
+ if (start_async(&rev_list))
+ die("git upload-pack: unable to fork git-rev-list");
+ }
+ else {
FILE *pipe_fd = xfdopen(pack_objects.in, "w");
- if (!create_full_pack) {
- int i;
- 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));
- }
+ int i;
+ 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));
fprintf(pipe_fd, "\n");
fflush(pipe_fd);
fclose(pipe_fd);
if (!has_sha1_file(sha1))
return -1;
- o = lookup_object(sha1);
- if (!(o && o->parsed))
- o = parse_object(sha1);
+ o = parse_object(sha1);
if (!o)
die("oops (%s)", sha1_to_hex(sha1));
if (o->type == OBJ_COMMIT) {
{
struct commit_list *work = NULL;
- insert_by_date(want, &work);
+ commit_list_insert_by_date(want, &work);
while (work) {
struct commit_list *list = work->next;
struct commit *commit = work->item;
for (list = commit->parents; list; list = list->next) {
struct commit *parent = list->item;
if (!(parent->object.flags & REACHABLE))
- insert_by_date(parent, &work);
+ commit_list_insert_by_date(parent, &work);
}
}
want->object.flags |= REACHABLE;
static int get_common_commits(void)
{
- static char line[1000];
unsigned char sha1[20];
char last_hex[41];
+ int got_common = 0;
+ int got_other = 0;
+ int sent_ready = 0;
save_commit_buffer = 0;
for (;;) {
- int len = packet_read_line(0, line, sizeof(line));
+ char *line = packet_read_line(0, NULL);
reset_timeout();
- if (!len) {
+ 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;
}
- strip(line, len);
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)
+ if (multi_ack == 2) {
+ sent_ready = 1;
packet_write(1, "ACK %s ready\n", hex);
- else
+ } 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);
}
}
+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;
+ if (!is_our_ref(o))
+ continue;
+ 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));
+ }
+}
+
static void receive_needs(void)
{
- struct object_array shallows = {0, 0, NULL};
- static char line[1000];
- int len, depth = 0;
+ struct object_array shallows = OBJECT_ARRAY_INIT;
+ int depth = 0;
+ int has_non_tip = 0;
shallow_nr = 0;
- if (debug_fd)
- write_str_in_full(debug_fd, "#S\n");
for (;;) {
struct object *o;
+ const char *features;
unsigned char sha1_buf[20];
- len = packet_read_line(0, line, sizeof(line));
+ char *line = packet_read_line(0, NULL);
reset_timeout();
- if (!len)
+ if (!line)
break;
- if (debug_fd)
- write_in_full(debug_fd, line, len);
if (!prefixcmp(line, "shallow ")) {
unsigned char sha1[20];
struct object *object;
- if (get_sha1(line + 8, sha1))
+ if (get_sha1_hex(line + 8, sha1))
die("invalid shallow line: %s", line);
object = parse_object(sha1);
if (!object)
die("did not find object for %s", line);
- object->flags |= CLIENT_SHALLOW;
- add_object_array(object, NULL, &shallows);
+ 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 ")) {
get_sha1_hex(line+5, sha1_buf))
die("git upload-pack: protocol error, "
"expected to get sha, not '%s'", line);
- if (strstr(line+45, "multi_ack_detailed"))
+
+ features = line + 45;
+
+ if (parse_feature_request(features, "multi_ack_detailed"))
multi_ack = 2;
- else if (strstr(line+45, "multi_ack"))
+ else if (parse_feature_request(features, "multi_ack"))
multi_ack = 1;
- if (strstr(line+45, "thin-pack"))
+ if (parse_feature_request(features, "no-done"))
+ no_done = 1;
+ if (parse_feature_request(features, "thin-pack"))
use_thin_pack = 1;
- if (strstr(line+45, "ofs-delta"))
+ if (parse_feature_request(features, "ofs-delta"))
use_ofs_delta = 1;
- if (strstr(line+45, "side-band-64k"))
+ if (parse_feature_request(features, "side-band-64k"))
use_sideband = LARGE_PACKET_MAX;
- else if (strstr(line+45, "side-band"))
+ else if (parse_feature_request(features, "side-band"))
use_sideband = DEFAULT_PACKET_MAX;
- if (strstr(line+45, "no-progress"))
+ if (parse_feature_request(features, "no-progress"))
no_progress = 1;
- if (strstr(line+45, "include-tag"))
+ if (parse_feature_request(features, "include-tag"))
use_include_tag = 1;
- /* We have sent all our refs already, and the other end
- * should have chosen out of them; otherwise they are
- * asking for nonsense.
- *
- * Hmph. We may later want to allow "want" line that
- * asks for something like "master~10" (symbolic)...
- * would it make sense? I don't know.
- */
- o = lookup_object(sha1_buf);
- if (!o || !(o->flags & OUR_REF))
- die("git upload-pack: not our ref %s", line+5);
+ 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);
}
}
- if (debug_fd)
- write_str_in_full(debug_fd, "#E\n");
+
+ /*
+ * 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, *backup;
+ struct commit_list *result = NULL, *backup = NULL;
int i;
- backup = result = get_shallow_commits(&want_obj, depth,
- SHALLOW, NOT_SHALLOW);
+ 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))) {
free(shallows.objects);
}
+/* 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)
+{
+ 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 send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
{
static const char *capabilities = "multi_ack thin-pack side-band"
" side-band-64k ofs-delta shallow no-progress"
" include-tag multi_ack_detailed";
- struct object *o = parse_object(sha1);
+ const char *refname_nons = strip_namespace(refname);
+ unsigned char peeled[20];
- if (!o)
- die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
+ if (mark_our_ref(refname, sha1, flag, cb_data))
+ return 0;
if (capabilities)
- packet_write(1, "%s %s%c%s\n", sha1_to_hex(sha1), refname,
- 0, capabilities);
+ packet_write(1, "%s %s%c%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" : "",
+ git_user_agent_sanitized());
else
- packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
+ packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons);
capabilities = NULL;
- if (!(o->flags & OUR_REF)) {
- o->flags |= OUR_REF;
- nr_our_refs++;
- }
- if (o->type == OBJ_TAG) {
- o = deref_tag(o, refname, 0);
- if (o)
- packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
- }
- return 0;
-}
-
-static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
-{
- struct object *o = parse_object(sha1);
- if (!o)
- die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
- if (!(o->flags & OUR_REF)) {
- o->flags |= OUR_REF;
- nr_our_refs++;
- }
+ if (!peel_ref(refname, peeled))
+ packet_write(1, "%s %s^{}\n", sha1_to_hex(peeled), refname_nons);
return 0;
}
{
if (advertise_refs || !stateless_rpc) {
reset_timeout();
- head_ref(send_ref, NULL);
- for_each_ref(send_ref, NULL);
+ head_ref_namespaced(send_ref, NULL);
+ for_each_namespaced_ref(send_ref, NULL);
packet_flush(1);
} else {
- head_ref(mark_our_ref, NULL);
- for_each_ref(mark_our_ref, NULL);
+ head_ref_namespaced(mark_our_ref, NULL);
+ for_each_namespaced_ref(mark_our_ref, NULL);
}
if (advertise_refs)
return;
}
}
+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);
+ return parse_hide_refs_config(var, value, "uploadpack");
+}
+
int main(int argc, char **argv)
{
char *dir;
int i;
int strict = 0;
+ git_setup_gettext();
+
+ packet_trace_identity("upload-pack");
git_extract_argv0_path(argv[0]);
read_replace_refs = 0;
die("'%s' does not appear to be a git repository", dir);
if (is_repository_shallow())
die("attempt to fetch/clone from a shallow repository");
- if (getenv("GIT_DEBUG_SEND_PACK"))
- debug_fd = atoi(getenv("GIT_DEBUG_SEND_PACK"));
+ git_config(upload_pack_config, NULL);
upload_pack();
return 0;
}