Merge branch 'js/rebase-orig-head-fix'
[gitweb.git] / builtin / receive-pack.c
index 75e7f18aceffc42b5fdc58296559c67d47203098..29f165d8bd3513a6f85667b070e8f157994364bb 100644 (file)
@@ -1,4 +1,5 @@
 #include "builtin.h"
+#include "repository.h"
 #include "config.h"
 #include "lockfile.h"
 #include "pack.h"
@@ -6,7 +7,7 @@
 #include "pkt-line.h"
 #include "sideband.h"
 #include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "commit.h"
 #include "object.h"
 #include "remote.h"
@@ -24,7 +25,9 @@
 #include "tmp-objdir.h"
 #include "oidset.h"
 #include "packfile.h"
+#include "object-store.h"
 #include "protocol.h"
+#include "commit-reach.h"
 
 static const char * const receive_pack_usage[] = {
        N_("git receive-pack <git-dir>"),
@@ -278,8 +281,7 @@ static int show_ref_cb(const char *path_full, const struct object_id *oid,
        return 0;
 }
 
-static void show_one_alternate_ref(const char *refname,
-                                  const struct object_id *oid,
+static void show_one_alternate_ref(const struct object_id *oid,
                                   void *data)
 {
        struct oidset *seen = data;
@@ -453,21 +455,21 @@ static void hmac_sha1(unsigned char *out,
        /* RFC 2104 2. (6) & (7) */
        git_SHA1_Init(&ctx);
        git_SHA1_Update(&ctx, k_opad, sizeof(k_opad));
-       git_SHA1_Update(&ctx, out, 20);
+       git_SHA1_Update(&ctx, out, GIT_SHA1_RAWSZ);
        git_SHA1_Final(out, &ctx);
 }
 
 static char *prepare_push_cert_nonce(const char *path, timestamp_t stamp)
 {
        struct strbuf buf = STRBUF_INIT;
-       unsigned char sha1[20];
+       unsigned char sha1[GIT_SHA1_RAWSZ];
 
        strbuf_addf(&buf, "%s:%"PRItime, path, stamp);
-       hmac_sha1(sha1, buf.buf, buf.len, cert_nonce_seed, strlen(cert_nonce_seed));;
+       hmac_sha1(sha1, buf.buf, buf.len, cert_nonce_seed, strlen(cert_nonce_seed));
        strbuf_release(&buf);
 
        /* RFC 2104 5. HMAC-SHA1-80 */
-       strbuf_addf(&buf, "%"PRItime"-%.*s", stamp, 20, sha1_to_hex(sha1));
+       strbuf_addf(&buf, "%"PRItime"-%.*s", stamp, GIT_SHA1_HEXSZ, sha1_to_hex(sha1));
        return strbuf_detach(&buf, NULL);
 }
 
@@ -628,8 +630,6 @@ static void prepare_push_cert_sha1(struct child_process *proc)
                return;
 
        if (!already_done) {
-               struct strbuf gpg_output = STRBUF_INIT;
-               struct strbuf gpg_status = STRBUF_INIT;
                int bogs /* beginning_of_gpg_sig */;
 
                already_done = 1;
@@ -638,22 +638,11 @@ static void prepare_push_cert_sha1(struct child_process *proc)
                        oidclr(&push_cert_oid);
 
                memset(&sigcheck, '\0', sizeof(sigcheck));
-               sigcheck.result = 'N';
 
                bogs = parse_signature(push_cert.buf, push_cert.len);
-               if (verify_signed_buffer(push_cert.buf, bogs,
-                                        push_cert.buf + bogs, push_cert.len - bogs,
-                                        &gpg_output, &gpg_status) < 0) {
-                       ; /* error running gpg */
-               } else {
-                       sigcheck.payload = push_cert.buf;
-                       sigcheck.gpg_output = gpg_output.buf;
-                       sigcheck.gpg_status = gpg_status.buf;
-                       parse_gpg_output(&sigcheck);
-               }
+               check_signature(push_cert.buf, bogs, push_cert.buf + bogs,
+                               push_cert.len - bogs, &sigcheck);
 
-               strbuf_release(&gpg_output);
-               strbuf_release(&gpg_status);
                nonce_status = check_nonce(push_cert.buf, bogs);
        }
        if (!is_null_oid(&push_cert_oid)) {
@@ -705,6 +694,8 @@ static int run_and_feed_hook(const char *hook_name, feed_fn feed,
        proc.argv = argv;
        proc.in = -1;
        proc.stdout_to_stderr = 1;
+       proc.trace2_hook_name = hook_name;
+
        if (feed_state->push_options) {
                int i;
                for (i = 0; i < feed_state->push_options->nr; i++)
@@ -818,6 +809,7 @@ static int run_update_hook(struct command *cmd)
        proc.stdout_to_stderr = 1;
        proc.err = use_sideband ? -1 : 0;
        proc.argv = argv;
+       proc.trace2_hook_name = "update";
 
        code = start_command(&proc);
        if (code)
@@ -875,7 +867,7 @@ static void refuse_unconfigured_deny_delete_current(void)
 static int command_singleton_iterator(void *cb_data, struct object_id *oid);
 static int update_shallow_ref(struct command *cmd, struct shallow_info *si)
 {
-       static struct lock_file shallow_lock;
+       struct lock_file shallow_lock = LOCK_INIT;
        struct oid_array extra = OID_ARRAY_INIT;
        struct check_connected_options opt = CHECK_CONNECTED_INIT;
        uint32_t mask = 1 << (cmd->index % 32);
@@ -904,7 +896,7 @@ static int update_shallow_ref(struct command *cmd, struct shallow_info *si)
         * not lose these new roots..
         */
        for (i = 0; i < extra.nr; i++)
-               register_shallow(&extra.oid[i]);
+               register_shallow(the_repository, &extra.oid[i]);
 
        si->shallow_ref[cmd->index] = 0;
        oid_array_clear(&extra);
@@ -967,7 +959,7 @@ static const char *push_to_deploy(unsigned char *sha1,
                return "Working directory has unstaged changes";
 
        /* diff-index with either HEAD or an empty tree */
-       diff_index[4] = head_has_history() ? "HEAD" : EMPTY_TREE_SHA1_HEX;
+       diff_index[4] = head_has_history() ? "HEAD" : empty_tree_oid_hex();
 
        child_process_init(&child);
        child.argv = diff_index;
@@ -1036,6 +1028,7 @@ static const char *update(struct command *cmd, struct shallow_info *si)
        const char *ret;
        struct object_id *old_oid = &cmd->old_oid;
        struct object_id *new_oid = &cmd->new_oid;
+       int do_update_worktree = 0;
 
        /* only refs/... are allowed */
        if (!starts_with(name, "refs/") || check_refname_format(name + 5, 0)) {
@@ -1061,9 +1054,8 @@ static const char *update(struct command *cmd, struct shallow_info *si)
                                refuse_unconfigured_deny();
                        return "branch is currently checked out";
                case DENY_UPDATE_INSTEAD:
-                       ret = update_worktree(new_oid->hash);
-                       if (ret)
-                               return ret;
+                       /* pass -- let other checks intervene first */
+                       do_update_worktree = 1;
                        break;
                }
        }
@@ -1106,8 +1098,8 @@ static const char *update(struct command *cmd, struct shallow_info *si)
                struct object *old_object, *new_object;
                struct commit *old_commit, *new_commit;
 
-               old_object = parse_object(old_oid);
-               new_object = parse_object(new_oid);
+               old_object = parse_object(the_repository, old_oid);
+               new_object = parse_object(the_repository, new_oid);
 
                if (!old_object || !new_object ||
                    old_object->type != OBJ_COMMIT ||
@@ -1128,9 +1120,15 @@ static const char *update(struct command *cmd, struct shallow_info *si)
                return "hook declined";
        }
 
+       if (do_update_worktree) {
+               ret = update_worktree(new_oid->hash);
+               if (ret)
+                       return ret;
+       }
+
        if (is_null_oid(new_oid)) {
                struct strbuf err = STRBUF_INIT;
-               if (!parse_object(old_oid)) {
+               if (!parse_object(the_repository, old_oid)) {
                        old_oid = NULL;
                        if (ref_exists(name)) {
                                rp_warning("Allowing deletion of corrupt ref.");
@@ -1195,6 +1193,7 @@ static void run_update_post_hook(struct command *commands)
        proc.no_stdin = 1;
        proc.stdout_to_stderr = 1;
        proc.err = use_sideband ? -1 : 0;
+       proc.trace2_hook_name = "post-update";
 
        if (!start_command(&proc)) {
                if (use_sideband)
@@ -1203,17 +1202,12 @@ static void run_update_post_hook(struct command *commands)
        }
 }
 
-static void check_aliased_update(struct command *cmd, struct string_list *list)
+static void check_aliased_update_internal(struct command *cmd,
+                                         struct string_list *list,
+                                         const char *dst_name, int flag)
 {
-       struct strbuf buf = STRBUF_INIT;
-       const char *dst_name;
        struct string_list_item *item;
        struct command *dst_cmd;
-       int flag;
-
-       strbuf_addf(&buf, "%s%s", get_git_namespace(), cmd->ref_name);
-       dst_name = resolve_ref_unsafe(buf.buf, 0, NULL, &flag);
-       strbuf_release(&buf);
 
        if (!(flag & REF_ISSYMREF))
                return;
@@ -1233,8 +1227,8 @@ static void check_aliased_update(struct command *cmd, struct string_list *list)
 
        dst_cmd = (struct command *) item->util;
 
-       if (!oidcmp(&cmd->old_oid, &dst_cmd->old_oid) &&
-           !oidcmp(&cmd->new_oid, &dst_cmd->new_oid))
+       if (oideq(&cmd->old_oid, &dst_cmd->old_oid) &&
+           oideq(&cmd->new_oid, &dst_cmd->new_oid))
                return;
 
        dst_cmd->skip_update = 1;
@@ -1242,16 +1236,28 @@ static void check_aliased_update(struct command *cmd, struct string_list *list)
        rp_error("refusing inconsistent update between symref '%s' (%s..%s) and"
                 " its target '%s' (%s..%s)",
                 cmd->ref_name,
-                find_unique_abbrev(cmd->old_oid.hash, DEFAULT_ABBREV),
-                find_unique_abbrev(cmd->new_oid.hash, DEFAULT_ABBREV),
+                find_unique_abbrev(&cmd->old_oid, DEFAULT_ABBREV),
+                find_unique_abbrev(&cmd->new_oid, DEFAULT_ABBREV),
                 dst_cmd->ref_name,
-                find_unique_abbrev(dst_cmd->old_oid.hash, DEFAULT_ABBREV),
-                find_unique_abbrev(dst_cmd->new_oid.hash, DEFAULT_ABBREV));
+                find_unique_abbrev(&dst_cmd->old_oid, DEFAULT_ABBREV),
+                find_unique_abbrev(&dst_cmd->new_oid, DEFAULT_ABBREV));
 
        cmd->error_string = dst_cmd->error_string =
                "inconsistent aliased update";
 }
 
+static void check_aliased_update(struct command *cmd, struct string_list *list)
+{
+       struct strbuf buf = STRBUF_INIT;
+       const char *dst_name;
+       int flag;
+
+       strbuf_addf(&buf, "%s%s", get_git_namespace(), cmd->ref_name);
+       dst_name = resolve_ref_unsafe(buf.buf, 0, NULL, &flag);
+       check_aliased_update_internal(cmd, list, dst_name, flag);
+       strbuf_release(&buf);
+}
+
 static void check_aliased_updates(struct command *commands)
 {
        struct command *cmd;
@@ -1377,7 +1383,7 @@ static void warn_if_skipped_connectivity_check(struct command *commands,
                }
        }
        if (!checked_connectivity)
-               die("BUG: connectivity check skipped???");
+               BUG("connectivity check skipped???");
 }
 
 static void execute_commands_non_atomic(struct command *commands,
@@ -1574,30 +1580,29 @@ static void queue_commands_from_cert(struct command **tail,
        }
 }
 
-static struct command *read_head_info(struct oid_array *shallow)
+static struct command *read_head_info(struct packet_reader *reader,
+                                     struct oid_array *shallow)
 {
        struct command *commands = NULL;
        struct command **p = &commands;
        for (;;) {
-               char *line;
-               int len, linelen;
+               int linelen;
 
-               line = packet_read_line(0, &len);
-               if (!line)
+               if (packet_reader_read(reader) != PACKET_READ_NORMAL)
                        break;
 
-               if (len > 8 && starts_with(line, "shallow ")) {
+               if (reader->pktlen > 8 && starts_with(reader->line, "shallow ")) {
                        struct object_id oid;
-                       if (get_oid_hex(line + 8, &oid))
+                       if (get_oid_hex(reader->line + 8, &oid))
                                die("protocol error: expected shallow sha, got '%s'",
-                                   line + 8);
+                                   reader->line + 8);
                        oid_array_append(shallow, &oid);
                        continue;
                }
 
-               linelen = strlen(line);
-               if (linelen < len) {
-                       const char *feature_list = line + linelen + 1;
+               linelen = strlen(reader->line);
+               if (linelen < reader->pktlen) {
+                       const char *feature_list = reader->line + linelen + 1;
                        if (parse_feature_request(feature_list, "report-status"))
                                report_status = 1;
                        if (parse_feature_request(feature_list, "side-band-64k"))
@@ -1612,28 +1617,32 @@ static struct command *read_head_info(struct oid_array *shallow)
                                use_push_options = 1;
                }
 
-               if (!strcmp(line, "push-cert")) {
+               if (!strcmp(reader->line, "push-cert")) {
                        int true_flush = 0;
-                       char certbuf[1024];
+                       int saved_options = reader->options;
+                       reader->options &= ~PACKET_READ_CHOMP_NEWLINE;
 
                        for (;;) {
-                               len = packet_read(0, NULL, NULL,
-                                                 certbuf, sizeof(certbuf), 0);
-                               if (!len) {
+                               packet_reader_read(reader);
+                               if (reader->status == PACKET_READ_FLUSH) {
                                        true_flush = 1;
                                        break;
                                }
-                               if (!strcmp(certbuf, "push-cert-end\n"))
+                               if (reader->status != PACKET_READ_NORMAL) {
+                                       die("protocol error: got an unexpected packet");
+                               }
+                               if (!strcmp(reader->line, "push-cert-end\n"))
                                        break; /* end of cert */
-                               strbuf_addstr(&push_cert, certbuf);
+                               strbuf_addstr(&push_cert, reader->line);
                        }
+                       reader->options = saved_options;
 
                        if (true_flush)
                                break;
                        continue;
                }
 
-               p = queue_command(p, line, linelen);
+               p = queue_command(p, reader->line, linelen);
        }
 
        if (push_cert.len)
@@ -1642,18 +1651,14 @@ static struct command *read_head_info(struct oid_array *shallow)
        return commands;
 }
 
-static void read_push_options(struct string_list *options)
+static void read_push_options(struct packet_reader *reader,
+                             struct string_list *options)
 {
        while (1) {
-               char *line;
-               int len;
-
-               line = packet_read_line(0, &len);
-
-               if (!line)
+               if (packet_reader_read(reader) != PACKET_READ_NORMAL)
                        break;
 
-               string_list_append(options, line);
+               string_list_append(options, reader->line);
        }
 }
 
@@ -1778,7 +1783,7 @@ static const char *unpack(int err_fd, struct shallow_info *si)
                status = finish_command(&child);
                if (status)
                        return "index-pack abnormal exit";
-               reprepare_packed_git();
+               reprepare_packed_git(the_repository);
        }
        return NULL;
 }
@@ -1844,7 +1849,7 @@ static void prepare_shallow_update(struct command *commands,
        /*
         * keep hooks happy by forcing a temporary shallow file via
         * env variable because we can't add --shallow-file to every
-        * command. check_everything_connected() will be done with
+        * command. check_connected() will be done with
         * true .git/shallow though.
         */
        setenv(GIT_SHALLOW_FILE_ENVIRONMENT, alt_shallow_file, 1);
@@ -1929,6 +1934,7 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
        struct oid_array shallow = OID_ARRAY_INIT;
        struct oid_array ref = OID_ARRAY_INIT;
        struct shallow_info si;
+       struct packet_reader reader;
 
        struct option options[] = {
                OPT__QUIET(&quiet, N_("quiet")),
@@ -1964,6 +1970,12 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
                unpack_limit = receive_unpack_limit;
 
        switch (determine_protocol_version_server()) {
+       case protocol_v2:
+               /*
+                * push support for protocol v2 has not been implemented yet,
+                * so ignore the request to use v2 and fallback to using v0.
+                */
+               break;
        case protocol_v1:
                /*
                 * v1 is just the original protocol with a version string,
@@ -1985,12 +1997,16 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
        if (advertise_refs)
                return 0;
 
-       if ((commands = read_head_info(&shallow)) != NULL) {
+       packet_reader_init(&reader, 0, NULL, 0,
+                          PACKET_READ_CHOMP_NEWLINE |
+                          PACKET_READ_DIE_ON_ERR_PACKET);
+
+       if ((commands = read_head_info(&reader, &shallow)) != NULL) {
                const char *unpack_status = NULL;
                struct string_list push_options = STRING_LIST_INIT_DUP;
 
                if (use_push_options)
-                       read_push_options(&push_options);
+                       read_push_options(&reader, &push_options);
                if (!check_cert_push_options(&push_options)) {
                        struct command *cmd;
                        for (cmd = commands; cmd; cmd = cmd->next)
@@ -2027,7 +2043,7 @@ int cmd_receive_pack(int argc, const char **argv, const char *prefix)
                        proc.git_cmd = 1;
                        proc.argv = argv_gc_auto;
 
-                       close_all_packs();
+                       close_all_packs(the_repository->objects);
                        if (!start_command(&proc)) {
                                if (use_sideband)
                                        copy_to_sideband(proc.err, -1, NULL);