Code

use write_str_in_full helper to avoid literal string lengths
[git.git] / transport.c
index 9ae92cd39c3f45cb2a58a24801a790ce6622d22c..4cb807700a445fd985bbcc77259a9b5b484d1932 100644 (file)
@@ -1,9 +1,6 @@
 #include "cache.h"
 #include "transport.h"
 #include "run-command.h"
-#ifndef NO_CURL
-#include "http.h"
-#endif
 #include "pkt-line.h"
 #include "fetch-pack.h"
 #include "send-pack.h"
@@ -143,7 +140,7 @@ static const char *rsync_url(const char *url)
        return prefixcmp(url, "rsync://") ? skip_prefix(url, "rsync:") : url;
 }
 
-static struct ref *get_refs_via_rsync(struct transport *transport)
+static struct ref *get_refs_via_rsync(struct transport *transport, int for_push)
 {
        struct strbuf buf = STRBUF_INIT, temp_dir = STRBUF_INIT;
        struct ref dummy, *tail = &dummy;
@@ -151,11 +148,14 @@ static struct ref *get_refs_via_rsync(struct transport *transport)
        const char *args[5];
        int temp_dir_len;
 
+       if (for_push)
+               return NULL;
+
        /* copy the refs to the temporary directory */
 
        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
        if (!mkdtemp(temp_dir.buf))
-               die ("Could not make temporary directory");
+               die_errno ("Could not make temporary directory");
        temp_dir_len = temp_dir.len;
 
        strbuf_addstr(&buf, rsync_url(transport->url));
@@ -318,7 +318,7 @@ static int rsync_transport_push(struct transport *transport,
 
        strbuf_addstr(&temp_dir, git_path("rsync-refs-XXXXXX"));
        if (!mkdtemp(temp_dir.buf))
-               die ("Could not make temporary directory");
+               die_errno ("Could not make temporary directory");
        strbuf_addch(&temp_dir, '/');
 
        if (flags & TRANSPORT_PUSH_ALL) {
@@ -349,51 +349,11 @@ static int rsync_transport_push(struct transport *transport,
        return result;
 }
 
-/* Generic functions for using commit walkers */
-
-#ifndef NO_CURL /* http fetch is the only user */
-static int fetch_objs_via_walker(struct transport *transport,
-                                int nr_objs, const struct ref **to_fetch)
-{
-       char *dest = xstrdup(transport->url);
-       struct walker *walker = transport->data;
-       char **objs = xmalloc(nr_objs * sizeof(*objs));
-       int i;
-
-       walker->get_all = 1;
-       walker->get_tree = 1;
-       walker->get_history = 1;
-       walker->get_verbosely = transport->verbose >= 0;
-       walker->get_recover = 0;
-
-       for (i = 0; i < nr_objs; i++)
-               objs[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
-
-       if (walker_fetch(walker, nr_objs, objs, NULL, NULL))
-               die("Fetch failed.");
-
-       for (i = 0; i < nr_objs; i++)
-               free(objs[i]);
-       free(objs);
-       free(dest);
-       return 0;
-}
-#endif /* NO_CURL */
-
-static int disconnect_walker(struct transport *transport)
-{
-       struct walker *walker = transport->data;
-       if (walker)
-               walker_free(walker);
-       return 0;
-}
-
 #ifndef NO_CURL
 static int curl_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
 {
        const char **argv;
        int argc;
-       int err;
 
        if (flags & TRANSPORT_PUSH_MIRROR)
                return error("http transport does not support mirror mode");
@@ -413,116 +373,7 @@ static int curl_transport_push(struct transport *transport, int refspec_nr, cons
        while (refspec_nr--)
                argv[argc++] = *refspec++;
        argv[argc] = NULL;
-       err = run_command_v_opt(argv, RUN_GIT_CMD);
-       switch (err) {
-       case -ERR_RUN_COMMAND_FORK:
-               error("unable to fork for %s", argv[0]);
-       case -ERR_RUN_COMMAND_EXEC:
-               error("unable to exec %s", argv[0]);
-               break;
-       case -ERR_RUN_COMMAND_WAITPID:
-       case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
-       case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
-       case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
-               error("%s died with strange error", argv[0]);
-       }
-       return !!err;
-}
-
-static struct ref *get_refs_via_curl(struct transport *transport)
-{
-       struct strbuf buffer = STRBUF_INIT;
-       char *data, *start, *mid;
-       char *ref_name;
-       char *refs_url;
-       int i = 0;
-
-       struct active_request_slot *slot;
-       struct slot_results results;
-
-       struct ref *refs = NULL;
-       struct ref *ref = NULL;
-       struct ref *last_ref = NULL;
-
-       struct walker *walker;
-
-       if (!transport->data)
-               transport->data = get_http_walker(transport->url,
-                                               transport->remote);
-
-       walker = transport->data;
-
-       refs_url = xmalloc(strlen(transport->url) + 11);
-       sprintf(refs_url, "%s/info/refs", transport->url);
-
-       slot = get_active_slot();
-       slot->results = &results;
-       curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
-
-       if (start_active_slot(slot)) {
-               run_active_slot(slot);
-               if (results.curl_result != CURLE_OK) {
-                       strbuf_release(&buffer);
-                       if (missing_target(&results))
-                               die("%s not found: did you run git update-server-info on the server?", refs_url);
-                       else
-                               die("%s download error - %s", refs_url, curl_errorstr);
-               }
-       } else {
-               strbuf_release(&buffer);
-               die("Unable to start HTTP request");
-       }
-
-       data = buffer.buf;
-       start = NULL;
-       mid = data;
-       while (i < buffer.len) {
-               if (!start)
-                       start = &data[i];
-               if (data[i] == '\t')
-                       mid = &data[i];
-               if (data[i] == '\n') {
-                       data[i] = 0;
-                       ref_name = mid + 1;
-                       ref = xmalloc(sizeof(struct ref) +
-                                     strlen(ref_name) + 1);
-                       memset(ref, 0, sizeof(struct ref));
-                       strcpy(ref->name, ref_name);
-                       get_sha1_hex(start, ref->old_sha1);
-                       if (!refs)
-                               refs = ref;
-                       if (last_ref)
-                               last_ref->next = ref;
-                       last_ref = ref;
-                       start = NULL;
-               }
-               i++;
-       }
-
-       strbuf_release(&buffer);
-
-       ref = alloc_ref("HEAD");
-       if (!walker->fetch_ref(walker, ref) &&
-           !resolve_remote_symref(ref, refs)) {
-               ref->next = refs;
-               refs = ref;
-       } else {
-               free(ref);
-       }
-
-       return refs;
-}
-
-static int fetch_objs_via_curl(struct transport *transport,
-                                int nr_objs, const struct ref **to_fetch)
-{
-       if (!transport->data)
-               transport->data = get_http_walker(transport->url,
-                                               transport->remote);
-       return fetch_objs_via_walker(transport, nr_objs, to_fetch);
+       return !!run_command_v_opt(argv, RUN_GIT_CMD);
 }
 
 #endif
@@ -532,12 +383,15 @@ struct bundle_transport_data {
        struct bundle_header header;
 };
 
-static struct ref *get_refs_from_bundle(struct transport *transport)
+static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
 {
        struct bundle_transport_data *data = transport->data;
        struct ref *result = NULL;
        int i;
 
+       if (for_push)
+               return NULL;
+
        if (data->fd > 0)
                close(data->fd);
        data->fd = read_bundle_header(transport->url, &data->header);
@@ -578,6 +432,7 @@ struct git_transport_data {
        int fd[2];
        const char *uploadpack;
        const char *receivepack;
+       struct extra_have_objects extra_have;
 };
 
 static int set_git_option(struct transport *connection,
@@ -609,20 +464,23 @@ static int set_git_option(struct transport *connection,
        return 1;
 }
 
-static int connect_setup(struct transport *transport)
+static int connect_setup(struct transport *transport, int for_push, int verbose)
 {
        struct git_transport_data *data = transport->data;
-       data->conn = git_connect(data->fd, transport->url, data->uploadpack, 0);
+       data->conn = git_connect(data->fd, transport->url,
+                                for_push ? data->receivepack : data->uploadpack,
+                                verbose ? CONNECT_VERBOSE : 0);
        return 0;
 }
 
-static struct ref *get_refs_via_connect(struct transport *transport)
+static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
 {
        struct git_transport_data *data = transport->data;
        struct ref *refs;
 
-       connect_setup(transport);
-       get_remote_heads(data->fd[0], &refs, 0, NULL, 0, NULL);
+       connect_setup(transport, for_push, 0);
+       get_remote_heads(data->fd[0], &refs, 0, NULL,
+                        for_push ? REF_NORMAL : 0, &data->extra_have);
 
        return refs;
 }
@@ -654,7 +512,7 @@ static int fetch_refs_via_pack(struct transport *transport,
                origh[i] = heads[i] = xstrdup(to_fetch[i]->name);
 
        if (!data->conn) {
-               connect_setup(transport);
+               connect_setup(transport, 0, 0);
                get_remote_heads(data->fd[0], &refs_tmp, 0, NULL, 0, NULL);
        }
 
@@ -677,20 +535,247 @@ static int fetch_refs_via_pack(struct transport *transport,
        return (refs ? 0 : -1);
 }
 
-static int git_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags)
+static int push_had_errors(struct ref *ref)
+{
+       for (; ref; ref = ref->next) {
+               switch (ref->status) {
+               case REF_STATUS_NONE:
+               case REF_STATUS_UPTODATE:
+               case REF_STATUS_OK:
+                       break;
+               default:
+                       return 1;
+               }
+       }
+       return 0;
+}
+
+static int refs_pushed(struct ref *ref)
+{
+       for (; ref; ref = ref->next) {
+               switch(ref->status) {
+               case REF_STATUS_NONE:
+               case REF_STATUS_UPTODATE:
+                       break;
+               default:
+                       return 1;
+               }
+       }
+       return 0;
+}
+
+static void update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
+{
+       struct refspec rs;
+
+       if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
+               return;
+
+       rs.src = ref->name;
+       rs.dst = NULL;
+
+       if (!remote_find_tracking(remote, &rs)) {
+               if (verbose)
+                       fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
+               if (ref->deletion) {
+                       delete_ref(rs.dst, NULL, 0);
+               } else
+                       update_ref("update by push", rs.dst,
+                                       ref->new_sha1, NULL, 0, 0);
+               free(rs.dst);
+       }
+}
+
+#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
+
+static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
+{
+       if (porcelain) {
+               if (from)
+                       fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
+               else
+                       fprintf(stdout, "%c\t:%s\t", flag, to->name);
+               if (msg)
+                       fprintf(stdout, "%s (%s)\n", summary, msg);
+               else
+                       fprintf(stdout, "%s\n", summary);
+       } else {
+               fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
+               if (from)
+                       fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
+               else
+                       fputs(prettify_refname(to->name), stderr);
+               if (msg) {
+                       fputs(" (", stderr);
+                       fputs(msg, stderr);
+                       fputc(')', stderr);
+               }
+               fputc('\n', stderr);
+       }
+}
+
+static const char *status_abbrev(unsigned char sha1[20])
+{
+       return find_unique_abbrev(sha1, DEFAULT_ABBREV);
+}
+
+static void print_ok_ref_status(struct ref *ref, int porcelain)
+{
+       if (ref->deletion)
+               print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
+       else if (is_null_sha1(ref->old_sha1))
+               print_ref_status('*',
+                       (!prefixcmp(ref->name, "refs/tags/") ? "[new tag]" :
+                       "[new branch]"),
+                       ref, ref->peer_ref, NULL, porcelain);
+       else {
+               char quickref[84];
+               char type;
+               const char *msg;
+
+               strcpy(quickref, status_abbrev(ref->old_sha1));
+               if (ref->nonfastforward) {
+                       strcat(quickref, "...");
+                       type = '+';
+                       msg = "forced update";
+               } else {
+                       strcat(quickref, "..");
+                       type = ' ';
+                       msg = NULL;
+               }
+               strcat(quickref, status_abbrev(ref->new_sha1));
+
+               print_ref_status(type, quickref, ref, ref->peer_ref, msg, porcelain);
+       }
+}
+
+static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
+{
+       if (!count)
+               fprintf(stderr, "To %s\n", dest);
+
+       switch(ref->status) {
+       case REF_STATUS_NONE:
+               print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
+               break;
+       case REF_STATUS_REJECT_NODELETE:
+               print_ref_status('!', "[rejected]", ref, NULL,
+                                                "remote does not support deleting refs", porcelain);
+               break;
+       case REF_STATUS_UPTODATE:
+               print_ref_status('=', "[up to date]", ref,
+                                                ref->peer_ref, NULL, porcelain);
+               break;
+       case REF_STATUS_REJECT_NONFASTFORWARD:
+               print_ref_status('!', "[rejected]", ref, ref->peer_ref,
+                                                "non-fast forward", porcelain);
+               break;
+       case REF_STATUS_REMOTE_REJECT:
+               print_ref_status('!', "[remote rejected]", ref,
+                                                ref->deletion ? NULL : ref->peer_ref,
+                                                ref->remote_status, porcelain);
+               break;
+       case REF_STATUS_EXPECTING_REPORT:
+               print_ref_status('!', "[remote failure]", ref,
+                                                ref->deletion ? NULL : ref->peer_ref,
+                                                "remote failed to report status", porcelain);
+               break;
+       case REF_STATUS_OK:
+               print_ok_ref_status(ref, porcelain);
+               break;
+       }
+
+       return 1;
+}
+
+static void print_push_status(const char *dest, struct ref *refs,
+                             int verbose, int porcelain, int * nonfastforward)
+{
+       struct ref *ref;
+       int n = 0;
+
+       if (verbose) {
+               for (ref = refs; ref; ref = ref->next)
+                       if (ref->status == REF_STATUS_UPTODATE)
+                               n += print_one_push_status(ref, dest, n, porcelain);
+       }
+
+       for (ref = refs; ref; ref = ref->next)
+               if (ref->status == REF_STATUS_OK)
+                       n += print_one_push_status(ref, dest, n, porcelain);
+
+       *nonfastforward = 0;
+       for (ref = refs; ref; ref = ref->next) {
+               if (ref->status != REF_STATUS_NONE &&
+                   ref->status != REF_STATUS_UPTODATE &&
+                   ref->status != REF_STATUS_OK)
+                       n += print_one_push_status(ref, dest, n, porcelain);
+               if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD)
+                       *nonfastforward = 1;
+       }
+}
+
+static void verify_remote_names(int nr_heads, const char **heads)
+{
+       int i;
+
+       for (i = 0; i < nr_heads; i++) {
+               const char *local = heads[i];
+               const char *remote = strrchr(heads[i], ':');
+
+               if (*local == '+')
+                       local++;
+
+               /* A matching refspec is okay.  */
+               if (remote == local && remote[1] == '\0')
+                       continue;
+
+               remote = remote ? (remote + 1) : local;
+               switch (check_ref_format(remote)) {
+               case 0: /* ok */
+               case CHECK_REF_FORMAT_ONELEVEL:
+                       /* ok but a single level -- that is fine for
+                        * a match pattern.
+                        */
+               case CHECK_REF_FORMAT_WILDCARD:
+                       /* ok but ends with a pattern-match character */
+                       continue;
+               }
+               die("remote part of refspec is not a valid name in %s",
+                   heads[i]);
+       }
+}
+
+static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
 {
        struct git_transport_data *data = transport->data;
        struct send_pack_args args;
+       int ret;
+
+       if (!data->conn) {
+               struct ref *tmp_refs;
+               connect_setup(transport, 1, 0);
+
+               get_remote_heads(data->fd[0], &tmp_refs, 0, NULL, REF_NORMAL,
+                                NULL);
+       }
 
-       args.receivepack = data->receivepack;
-       args.send_all = !!(flags & TRANSPORT_PUSH_ALL);
        args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
        args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
        args.use_thin_pack = data->thin;
        args.verbose = !!(flags & TRANSPORT_PUSH_VERBOSE);
+       args.quiet = !!(flags & TRANSPORT_PUSH_QUIET);
        args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
 
-       return send_pack(&args, transport->url, transport->remote, refspec_nr, refspec);
+       ret = send_pack(&args, data->fd, data->conn, remote_refs,
+                       &data->extra_have);
+
+       close(data->fd[1]);
+       close(data->fd[0]);
+       ret |= finish_connect(data->conn);
+       data->conn = NULL;
+
+       return ret;
 }
 
 static int disconnect_git(struct transport *transport)
@@ -738,14 +823,12 @@ struct transport *transport_get(struct remote *remote, const char *url)
        } else if (!prefixcmp(url, "http://")
                || !prefixcmp(url, "https://")
                || !prefixcmp(url, "ftp://")) {
+               transport_helper_init(ret, "curl");
 #ifdef NO_CURL
                error("git was compiled without libcurl support.");
 #else
-               ret->get_refs_list = get_refs_via_curl;
-               ret->fetch = fetch_objs_via_curl;
                ret->push = curl_transport_push;
 #endif
-               ret->disconnect = disconnect_walker;
 
        } else if (is_local(url) && is_file(url)) {
                struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
@@ -760,7 +843,7 @@ struct transport *transport_get(struct remote *remote, const char *url)
                ret->set_option = set_git_option;
                ret->get_refs_list = get_refs_via_connect;
                ret->fetch = fetch_refs_via_pack;
-               ret->push = git_transport_push;
+               ret->push_refs = git_transport_push;
                ret->disconnect = disconnect_git;
 
                data->thin = 1;
@@ -785,28 +868,69 @@ int transport_set_option(struct transport *transport,
 }
 
 int transport_push(struct transport *transport,
-                  int refspec_nr, const char **refspec, int flags)
-{
-       if (!transport->push)
-               return 1;
-       return transport->push(transport, refspec_nr, refspec, flags);
+                  int refspec_nr, const char **refspec, int flags,
+                  int * nonfastforward)
+{
+       verify_remote_names(refspec_nr, refspec);
+
+       if (transport->push)
+               return transport->push(transport, refspec_nr, refspec, flags);
+       if (transport->push_refs) {
+               struct ref *remote_refs =
+                       transport->get_refs_list(transport, 1);
+               struct ref *local_refs = get_local_heads();
+               int match_flags = MATCH_REFS_NONE;
+               int verbose = flags & TRANSPORT_PUSH_VERBOSE;
+               int quiet = flags & TRANSPORT_PUSH_QUIET;
+               int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
+               int ret;
+
+               if (flags & TRANSPORT_PUSH_ALL)
+                       match_flags |= MATCH_REFS_ALL;
+               if (flags & TRANSPORT_PUSH_MIRROR)
+                       match_flags |= MATCH_REFS_MIRROR;
+
+               if (match_refs(local_refs, &remote_refs,
+                              refspec_nr, refspec, match_flags)) {
+                       return -1;
+               }
+
+               ret = transport->push_refs(transport, remote_refs, flags);
+
+               if (!quiet || push_had_errors(remote_refs))
+                       print_push_status(transport->url, remote_refs,
+                                       verbose | porcelain, porcelain,
+                                       nonfastforward);
+
+               if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
+                       struct ref *ref;
+                       for (ref = remote_refs; ref; ref = ref->next)
+                               update_tracking_ref(transport->remote, ref, verbose);
+               }
+
+               if (!quiet && !ret && !refs_pushed(remote_refs))
+                       fprintf(stderr, "Everything up-to-date\n");
+               return ret;
+       }
+       return 1;
 }
 
 const struct ref *transport_get_remote_refs(struct transport *transport)
 {
        if (!transport->remote_refs)
-               transport->remote_refs = transport->get_refs_list(transport);
+               transport->remote_refs = transport->get_refs_list(transport, 0);
        return transport->remote_refs;
 }
 
 int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 {
        int rc;
-       int nr_heads = 0, nr_alloc = 0;
+       int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
        const struct ref **heads = NULL;
        const struct ref *rm;
 
        for (rm = refs; rm; rm = rm->next) {
+               nr_refs++;
                if (rm->peer_ref &&
                    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
                        continue;
@@ -814,6 +938,19 @@ int transport_fetch_refs(struct transport *transport, const struct ref *refs)
                heads[nr_heads++] = rm;
        }
 
+       if (!nr_heads) {
+               /*
+                * When deepening of a shallow repository is requested,
+                * then local and remote refs are likely to still be equal.
+                * Just feed them all to the fetch method in that case.
+                * This condition shouldn't be met in a non-deepening fetch
+                * (see builtin-fetch.c:quickfetch()).
+                */
+               heads = xmalloc(nr_refs * sizeof(*heads));
+               for (rm = refs; rm; rm = rm->next)
+                       heads[nr_heads++] = rm;
+       }
+
        rc = transport->fetch(transport, nr_heads, heads);
        free(heads);
        return rc;
@@ -822,7 +959,7 @@ int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 void transport_unlock_pack(struct transport *transport)
 {
        if (transport->pack_lockfile) {
-               unlink(transport->pack_lockfile);
+               unlink_or_warn(transport->pack_lockfile);
                free(transport->pack_lockfile);
                transport->pack_lockfile = NULL;
        }
@@ -836,3 +973,51 @@ int transport_disconnect(struct transport *transport)
        free(transport);
        return ret;
 }
+
+/*
+ * Strip username (and password) from an url and return
+ * it in a newly allocated string.
+ */
+char *transport_anonymize_url(const char *url)
+{
+       char *anon_url, *scheme_prefix, *anon_part;
+       size_t anon_len, prefix_len = 0;
+
+       anon_part = strchr(url, '@');
+       if (is_local(url) || !anon_part)
+               goto literal_copy;
+
+       anon_len = strlen(++anon_part);
+       scheme_prefix = strstr(url, "://");
+       if (!scheme_prefix) {
+               if (!strchr(anon_part, ':'))
+                       /* cannot be "me@there:/path/name" */
+                       goto literal_copy;
+       } else {
+               const char *cp;
+               /* make sure scheme is reasonable */
+               for (cp = url; cp < scheme_prefix; cp++) {
+                       switch (*cp) {
+                               /* RFC 1738 2.1 */
+                       case '+': case '.': case '-':
+                               break; /* ok */
+                       default:
+                               if (isalnum(*cp))
+                                       break;
+                               /* it isn't */
+                               goto literal_copy;
+                       }
+               }
+               /* @ past the first slash does not count */
+               cp = strchr(scheme_prefix + 3, '/');
+               if (cp && cp < anon_part)
+                       goto literal_copy;
+               prefix_len = scheme_prefix - url + 3;
+       }
+       anon_url = xcalloc(1, 1 + prefix_len + anon_len);
+       memcpy(anon_url, url, prefix_len);
+       memcpy(anon_url + prefix_len, anon_part, anon_len);
+       return anon_url;
+literal_copy:
+       return xstrdup(url);
+}