Merge branch 'jh/checkout-auto-tracking' into maint

diff --git a/upload-pack.c b/upload-pack.c
index 948cfffe13376742cc46276652048cd6f5edaa7c..bfa6279cc418278079bd95854adfe8d8301b6788 100644 (file)
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -26,6 +26,7 @@ static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<
 #define SHALLOW                (1u << 16)
 #define NOT_SHALLOW    (1u << 17)
 #define CLIENT_SHALLOW (1u << 18)
+#define HIDDEN_REF     (1u << 19)
 
 static unsigned long oldest_have;
 
@@ -33,6 +34,7 @@ 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;
@@ -42,7 +44,6 @@ static unsigned int timeout;
  * otherwise maximum packet size (up to 65520 bytes).
  */
 static int use_sideband;
-static int debug_fd;
 static int advertise_refs;
 static int stateless_rpc;
 
@@ -51,13 +52,6 @@ static void reset_timeout(void)
        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)
@@ -70,7 +64,8 @@ static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
                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;
@@ -413,7 +408,6 @@ static int ok_to_give_up(void)
 
 static int get_common_commits(void)
 {
-       static char line[1000];
        unsigned char sha1[20];
        char last_hex[41];
        int got_common = 0;
@@ -423,10 +417,10 @@ static int get_common_commits(void)
        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;
@@ -445,7 +439,6 @@ static int get_common_commits(void)
                        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 */
@@ -485,6 +478,12 @@ static int get_common_commits(void)
        }
 }
 
+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[] = {
@@ -521,7 +520,7 @@ static void check_non_tip(void)
                o = get_indexed_object(--i);
                if (!o)
                        continue;
-               if (!(o->flags & OUR_REF))
+               if (!is_our_ref(o))
                        continue;
                memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40);
                if (write_in_full(cmd.in, namebuf, 42) < 0)
@@ -530,7 +529,7 @@ static void check_non_tip(void)
        namebuf[40] = '\n';
        for (i = 0; i < want_obj.nr; i++) {
                o = want_obj.objects[i].item;
-               if (o->flags & OUR_REF)
+               if (is_our_ref(o))
                        continue;
                memcpy(namebuf, sha1_to_hex(o->sha1), 40);
                if (write_in_full(cmd.in, namebuf, 41) < 0)
@@ -564,7 +563,7 @@ static void check_non_tip(void)
        /* 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 (!(o->flags & OUR_REF))
+               if (!is_our_ref(o))
                        die("git upload-pack: not our ref %s",
                            sha1_to_hex(o->sha1));
        }
@@ -573,36 +572,33 @@ static void check_non_tip(void)
 static void receive_needs(void)
 {
        struct object_array shallows = OBJECT_ARRAY_INIT;
-       static char line[1000];
-       int len, depth = 0;
+       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);
                        if (object->type != OBJ_COMMIT)
                                die("invalid shallow object %s", sha1_to_hex(sha1));
-                       object->flags |= CLIENT_SHALLOW;
-                       add_object_array(object, NULL, &shallows);
+                       if (!(object->flags & CLIENT_SHALLOW)) {
+                               object->flags |= CLIENT_SHALLOW;
+                               add_object_array(object, NULL, &shallows);
+                       }
                        continue;
                }
                if (!prefixcmp(line, "deepen ")) {
@@ -644,13 +640,11 @@ static void receive_needs(void)
                            sha1_to_hex(sha1_buf));
                if (!(o->flags & WANTED)) {
                        o->flags |= WANTED;
-                       if (!(o->flags & OUR_REF))
+                       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
@@ -730,8 +724,10 @@ static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag
 {
        struct object *o = lookup_unknown_object(sha1);
 
-       if (ref_is_hidden(refname))
+       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;
@@ -750,9 +746,10 @@ static int send_ref(const char *refname, const unsigned char *sha1, int flag, vo
                return 0;
 
        if (capabilities)
-               packet_write(1, "%s %s%c%s%s agent=%s\n",
+               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
@@ -786,6 +783,8 @@ static void upload_pack(void)
 
 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");
 }
 
@@ -841,8 +840,6 @@ int main(int argc, char **argv)
        if (is_repository_shallow())
                die("attempt to fetch/clone from a shallow repository");
        git_config(upload_pack_config, NULL);
-       if (getenv("GIT_DEBUG_SEND_PACK"))
-               debug_fd = atoi(getenv("GIT_DEBUG_SEND_PACK"));
        upload_pack();
        return 0;
 }