/src/git/promisor-remote.c

Source
#define USE_THE_REPOSITORY_VARIABLE

#include "git-compat-util.h"
#include "gettext.h"
#include "hex.h"
#include "odb.h"
#include "promisor-remote.h"
#include "config.h"
#include "trace2.h"
#include "transport.h"
#include "strvec.h"
#include "packfile.h"
#include "environment.h"
#include "url.h"
#include "version.h"

struct promisor_remote_config {
  struct promisor_remote *promisors;
  struct promisor_remote **promisors_tail;
};

static int fetch_objects(struct repository *repo,
       const char *remote_name,
       const struct object_id *oids,
       int oid_nr)
{
  struct child_process child = CHILD_PROCESS_INIT;
  int i;
  FILE *child_in;
  int quiet;

  if (git_env_bool(NO_LAZY_FETCH_ENVIRONMENT, 0)) {
    static int warning_shown;
    if (!warning_shown) {
      warning_shown = 1;
      warning(_("lazy fetching disabled; some objects may not be available"));
    }
    return -1;
  }

  child.git_cmd = 1;
  child.in = -1;
  if (repo != the_repository)
    prepare_other_repo_env(&child.env, repo->gitdir);
  strvec_pushl(&child.args, "-c", "fetch.negotiationAlgorithm=noop",
         "fetch", remote_name, "--no-tags",
         "--no-write-fetch-head", "--recurse-submodules=no",
         "--filter=blob:none", "--stdin", NULL);
  if (!repo_config_get_bool(the_repository, "promisor.quiet", &quiet) && quiet)
    strvec_push(&child.args, "--quiet");
  if (start_command(&child))
    die(_("promisor-remote: unable to fork off fetch subprocess"));
  child_in = xfdopen(child.in, "w");

  trace2_data_intmax("promisor", repo, "fetch_count", oid_nr);

  for (i = 0; i < oid_nr; i++) {
    if (fputs(oid_to_hex(&oids[i]), child_in) < 0)
      die_errno(_("promisor-remote: could not write to fetch subprocess"));
    if (fputc('\n', child_in) < 0)
      die_errno(_("promisor-remote: could not write to fetch subprocess"));
  }

  if (fclose(child_in) < 0)
    die_errno(_("promisor-remote: could not close stdin to fetch subprocess"));
  return finish_command(&child) ? -1 : 0;
}

static struct promisor_remote *promisor_remote_new(struct promisor_remote_config *config,
               const char *remote_name)
{
  struct promisor_remote *r;

  if (*remote_name == '/') {
    warning(_("promisor remote name cannot begin with '/': %s"),
      remote_name);
    return NULL;
  }

  FLEX_ALLOC_STR(r, name, remote_name);

  *config->promisors_tail = r;
  config->promisors_tail = &r->next;

  return r;
}

static struct promisor_remote *promisor_remote_lookup(struct promisor_remote_config *config,
                  const char *remote_name,
                  struct promisor_remote **previous)
{
  struct promisor_remote *r, *p;

  for (p = NULL, r = config->promisors; r; p = r, r = r->next)
    if (!strcmp(r->name, remote_name)) {
      if (previous)
        *previous = p;
      return r;
    }

  return NULL;
}

static void promisor_remote_move_to_tail(struct promisor_remote_config *config,
           struct promisor_remote *r,
           struct promisor_remote *previous)
{
  if (!r->next)
    return;

  if (previous)
    previous->next = r->next;
  else
    config->promisors = r->next ? r->next : r;
  r->next = NULL;
  *config->promisors_tail = r;
  config->promisors_tail = &r->next;
}

static int promisor_remote_config(const char *var, const char *value,
          const struct config_context *ctx UNUSED,
          void *data)
{
  struct promisor_remote_config *config = data;
  const char *name;
  size_t namelen;
  const char *subkey;

  if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
    return 0;

  if (!strcmp(subkey, "promisor")) {
    char *remote_name;

    if (!git_config_bool(var, value))
      return 0;

    remote_name = xmemdupz(name, namelen);

    if (!promisor_remote_lookup(config, remote_name, NULL))
      promisor_remote_new(config, remote_name);

    free(remote_name);
    return 0;
  }
  if (!strcmp(subkey, "partialclonefilter")) {
    struct promisor_remote *r;
    char *remote_name = xmemdupz(name, namelen);

    r = promisor_remote_lookup(config, remote_name, NULL);
    if (!r)
      r = promisor_remote_new(config, remote_name);

    free(remote_name);

    if (!r)
      return 0;

    FREE_AND_NULL(r->partial_clone_filter);
    return git_config_string(&r->partial_clone_filter, var, value);
  }

  return 0;
}

static void promisor_remote_init(struct repository *r)
{
  struct promisor_remote_config *config;

  if (r->promisor_remote_config)
    return;
  config = r->promisor_remote_config =
    xcalloc(1, sizeof(*r->promisor_remote_config));
  config->promisors_tail = &config->promisors;

  repo_config(r, promisor_remote_config, config);

  if (r->repository_format_partial_clone) {
    struct promisor_remote *o, *previous;

    o = promisor_remote_lookup(config,
             r->repository_format_partial_clone,
             &previous);
    if (o)
      promisor_remote_move_to_tail(config, o, previous);
    else
      promisor_remote_new(config, r->repository_format_partial_clone);
  }
}

void promisor_remote_clear(struct promisor_remote_config *config)
{
  while (config->promisors) {
    struct promisor_remote *r = config->promisors;
    free(r->partial_clone_filter);
    free(r->advertised_filter);
    config->promisors = config->promisors->next;
    free(r);
  }

  config->promisors_tail = &config->promisors;
}

void repo_promisor_remote_reinit(struct repository *r)
{
  promisor_remote_clear(r->promisor_remote_config);
  FREE_AND_NULL(r->promisor_remote_config);
  promisor_remote_init(r);
}

struct promisor_remote *repo_promisor_remote_find(struct repository *r,
              const char *remote_name)
{
  promisor_remote_init(r);

  if (!remote_name)
    return r->promisor_remote_config->promisors;

  return promisor_remote_lookup(r->promisor_remote_config, remote_name, NULL);
}

int repo_has_promisor_remote(struct repository *r)
{
  return !!repo_promisor_remote_find(r, NULL);
}

int repo_has_accepted_promisor_remote(struct repository *r)
{
  struct promisor_remote *p;

  promisor_remote_init(r);

  for (p = r->promisor_remote_config->promisors; p; p = p->next)
    if (p->accepted)
      return 1;
  return 0;
}

static int remove_fetched_oids(struct repository *repo,
             struct object_id **oids,
             int oid_nr, int to_free)
{
  int i, remaining_nr = 0;
  int *remaining = xcalloc(oid_nr, sizeof(*remaining));
  struct object_id *old_oids = *oids;
  struct object_id *new_oids;

  for (i = 0; i < oid_nr; i++)
    if (odb_read_object_info_extended(repo->objects, &old_oids[i], NULL,
              OBJECT_INFO_SKIP_FETCH_OBJECT)) {
      remaining[i] = 1;
      remaining_nr++;
    }

  if (remaining_nr) {
    int j = 0;
    CALLOC_ARRAY(new_oids, remaining_nr);
    for (i = 0; i < oid_nr; i++)
      if (remaining[i])
        oidcpy(&new_oids[j++], &old_oids[i]);
    *oids = new_oids;
    if (to_free)
      free(old_oids);
  }

  free(remaining);

  return remaining_nr;
}

void promisor_remote_get_direct(struct repository *repo,
        const struct object_id *oids,
        int oid_nr)
{
  struct promisor_remote *r;
  struct object_id *remaining_oids = (struct object_id *)oids;
  int remaining_nr = oid_nr;
  int to_free = 0;
  int i;

  if (oid_nr == 0)
    return;

  promisor_remote_init(repo);

  for (r = repo->promisor_remote_config->promisors; r; r = r->next) {
    if (fetch_objects(repo, r->name, remaining_oids, remaining_nr) < 0) {
      if (remaining_nr == 1)
        continue;
      remaining_nr = remove_fetched_oids(repo, &remaining_oids,
               remaining_nr, to_free);
      if (remaining_nr) {
        to_free = 1;
        continue;
      }
    }
    goto all_fetched;
  }

  for (i = 0; i < remaining_nr; i++) {
    if (is_promisor_object(repo, &remaining_oids[i]))
      die(_("could not fetch %s from promisor remote"),
          oid_to_hex(&remaining_oids[i]));
  }

all_fetched:
  if (to_free)
    free(remaining_oids);
}

static int allow_unsanitized(char ch)
{
  if (ch == ',' || ch == ';' || ch == '%')
    return 0;
  return ch > 32 && ch < 127;
}

/*
 * All the fields used in "promisor-remote" protocol capability,
 * including the mandatory "name" and "url" ones.
 */
static const char promisor_field_name[] = "name";
static const char promisor_field_url[] = "url";
static const char promisor_field_filter[] = "partialCloneFilter";
static const char promisor_field_token[] = "token";

/*
 * List of optional field names that can be used in the
 * "promisor-remote" protocol capability (others must be
 * ignored). Each field should correspond to a configurable property
 * of a remote that can be relevant for the client.
 */
static const char *known_fields[] = {
  promisor_field_filter, /* Filter used for partial clone */
  promisor_field_token,  /* Authentication token for the remote */
  NULL
};

/*
 * Check if 'field' is in the list of the known field names for the
 * "promisor-remote" protocol capability.
 */
static int is_known_field(const char *field)
{
  const char **p;

  for (p = known_fields; *p; p++)
    if (!strcasecmp(*p, field))
      return 1;
  return 0;
}

static int is_valid_field(struct string_list_item *item, void *cb_data)
{
  const char *field = item->string;
  const char *config_key = (const char *)cb_data;

  if (!is_known_field(field)) {
    warning(_("unsupported field '%s' in '%s' config"), field, config_key);
    return 0;
  }
  return 1;
}

static char *fields_from_config(struct string_list *fields_list, const char *config_key)
{
  char *fields = NULL;

  if (!repo_config_get_string(the_repository, config_key, &fields) && *fields) {
    string_list_split_in_place_f(fields_list, fields, ",", -1,
               STRING_LIST_SPLIT_TRIM |
               STRING_LIST_SPLIT_NONEMPTY);
    filter_string_list(fields_list, 0, is_valid_field, (void *)config_key);
  }

  return fields;
}

static struct string_list *initialize_fields_list(struct string_list *fields_list, int *initialized,
              const char *config_key)
{
  if (!*initialized) {
    fields_list->cmp = strcasecmp;
    fields_from_config(fields_list, config_key);
    *initialized = 1;
  }

  return fields_list;
}

static struct string_list *fields_sent(void)
{
  static struct string_list fields_list = STRING_LIST_INIT_NODUP;
  static int initialized;

  return initialize_fields_list(&fields_list, &initialized, "promisor.sendFields");
}

static struct string_list *fields_checked(void)
{
  static struct string_list fields_list = STRING_LIST_INIT_NODUP;
  static int initialized;

  return initialize_fields_list(&fields_list, &initialized, "promisor.checkFields");
}

static struct string_list *fields_stored(void)
{
  static struct string_list fields_list = STRING_LIST_INIT_NODUP;
  static int initialized;

  return initialize_fields_list(&fields_list, &initialized, "promisor.storeFields");
}

/*
 * Struct for promisor remotes involved in the "promisor-remote"
 * protocol capability.
 *
 * Except for "name", each <member> in this struct and its <value>
 * should correspond (either on the client side or on the server side)
 * to a "remote.<name>.<member>" config variable set to <value> where
 * "<name>" is a promisor remote name.
 */
struct promisor_info {
  const char *name;
  const char *url;
  const char *filter;
  const char *token;
};

static void promisor_info_free(struct promisor_info *p)
{
  free((char *)p->name);
  free((char *)p->url);
  free((char *)p->filter);
  free((char *)p->token);
  free(p);
}

static void promisor_info_list_clear(struct string_list *list)
{
  for (size_t i = 0; i < list->nr; i++)
    promisor_info_free(list->items[i].util);
  string_list_clear(list, 0);
}

static void set_one_field(struct promisor_info *p,
        const char *field, const char *value)
{
  if (!strcasecmp(field, promisor_field_filter))
    p->filter = xstrdup(value);
  else if (!strcasecmp(field, promisor_field_token))
    p->token = xstrdup(value);
  else
    BUG("invalid field '%s'", field);
}

static void set_fields(struct promisor_info *p,
           struct string_list *field_names)
{
  struct string_list_item *item;

  for_each_string_list_item(item, field_names) {
    char *key = xstrfmt("remote.%s.%s", p->name, item->string);
    const char *val;
    if (!repo_config_get_string_tmp(the_repository, key, &val) && *val)
      set_one_field(p, item->string, val);
    free(key);
  }
}

/*
 * Populate 'list' with promisor remote information from the config.
 * The 'util' pointer of each list item will hold a 'struct
 * promisor_info'. Except "name" and "url", only members of that
 * struct specified by the 'field_names' list are set (using values
 * from the configuration).
 */
static void promisor_config_info_list(struct repository *repo,
              struct string_list *list,
              struct string_list *field_names)
{
  struct promisor_remote *r;

  promisor_remote_init(repo);

  for (r = repo->promisor_remote_config->promisors; r; r = r->next) {
    const char *url;
    char *url_key = xstrfmt("remote.%s.url", r->name);

    /* Only add remotes with a non empty URL */
    if (!repo_config_get_string_tmp(the_repository, url_key, &url) && *url) {
      struct promisor_info *new_info = xcalloc(1, sizeof(*new_info));
      struct string_list_item *item;

      new_info->name = xstrdup(r->name);
      new_info->url = xstrdup(url);

      if (field_names)
        set_fields(new_info, field_names);

      item = string_list_append(list, new_info->name);
      item->util = new_info;
    }

    free(url_key);
  }
}

char *promisor_remote_info(struct repository *repo)
{
  struct strbuf sb = STRBUF_INIT;
  int advertise_promisors = 0;
  struct string_list config_info = STRING_LIST_INIT_NODUP;
  struct string_list_item *item;

  repo_config_get_bool(the_repository, "promisor.advertise", &advertise_promisors);

  if (!advertise_promisors)
    return NULL;

  promisor_config_info_list(repo, &config_info, fields_sent());

  if (!config_info.nr)
    return NULL;

  for_each_string_list_item(item, &config_info) {
    struct promisor_info *p = item->util;

    if (item != config_info.items)
      strbuf_addch(&sb, ';');

    strbuf_addf(&sb, "%s=", promisor_field_name);
    strbuf_addstr_urlencode(&sb, p->name, allow_unsanitized);
    strbuf_addf(&sb, ",%s=", promisor_field_url);
    strbuf_addstr_urlencode(&sb, p->url, allow_unsanitized);

    if (p->filter) {
      strbuf_addf(&sb, ",%s=", promisor_field_filter);
      strbuf_addstr_urlencode(&sb, p->filter, allow_unsanitized);
    }
    if (p->token) {
      strbuf_addf(&sb, ",%s=", promisor_field_token);
      strbuf_addstr_urlencode(&sb, p->token, allow_unsanitized);
    }
  }

  promisor_info_list_clear(&config_info);

  return strbuf_detach(&sb, NULL);
}

enum accept_promisor {
  ACCEPT_NONE = 0,
  ACCEPT_KNOWN_URL,
  ACCEPT_KNOWN_NAME,
  ACCEPT_ALL
};

static int match_field_against_config(const char *field, const char *value,
              struct promisor_info *config_info)
{
  if (config_info->filter && !strcasecmp(field, promisor_field_filter))
    return !strcmp(config_info->filter, value);
  else if (config_info->token && !strcasecmp(field, promisor_field_token))
    return !strcmp(config_info->token, value);

  return 0;
}

static int all_fields_match(struct promisor_info *advertised,
          struct string_list *config_info,
          int in_list)
{
  struct string_list *fields = fields_checked();
  struct string_list_item *item_checked;

  for_each_string_list_item(item_checked, fields) {
    int match = 0;
    const char *field = item_checked->string;
    const char *value = NULL;
    struct string_list_item *item;

    if (!strcasecmp(field, promisor_field_filter))
      value = advertised->filter;
    else if (!strcasecmp(field, promisor_field_token))
      value = advertised->token;

    if (!value)
      return 0;

    if (in_list) {
      for_each_string_list_item(item, config_info) {
        struct promisor_info *p = item->util;
        if (match_field_against_config(field, value, p)) {
          match = 1;
          break;
        }
      }
    } else {
      item = string_list_lookup(config_info, advertised->name);
      if (item) {
        struct promisor_info *p = item->util;
        match = match_field_against_config(field, value, p);
      }
    }

    if (!match)
      return 0;
  }

  return 1;
}

static int should_accept_remote(enum accept_promisor accept,
        struct promisor_info *advertised,
        struct string_list *config_info)
{
  struct promisor_info *p;
  struct string_list_item *item;
  const char *remote_name = advertised->name;
  const char *remote_url = advertised->url;

  if (accept == ACCEPT_ALL)
    return all_fields_match(advertised, config_info, 1);

  /* Get config info for that promisor remote */
  item = string_list_lookup(config_info, remote_name);

  if (!item)
    /* We don't know about that remote */
    return 0;

  p = item->util;

  if (accept == ACCEPT_KNOWN_NAME)
    return all_fields_match(advertised, config_info, 0);

  if (accept != ACCEPT_KNOWN_URL)
    BUG("Unhandled 'enum accept_promisor' value '%d'", accept);

  if (!remote_url || !*remote_url) {
    warning(_("no or empty URL advertised for remote '%s'"), remote_name);
    return 0;
  }

  if (!strcmp(p->url, remote_url))
    return all_fields_match(advertised, config_info, 0);

  warning(_("known remote named '%s' but with URL '%s' instead of '%s'"),
    remote_name, p->url, remote_url);

  return 0;
}

static int skip_field_name_prefix(const char *elem, const char *field_name, const char **value)
{
  const char *p;
  if (!skip_prefix(elem, field_name, &p) || *p != '=')
    return 0;
  *value = p + 1;
  return 1;
}

static struct promisor_info *parse_one_advertised_remote(const char *remote_info)
{
  struct promisor_info *info = xcalloc(1, sizeof(*info));
  struct string_list elem_list = STRING_LIST_INIT_DUP;
  struct string_list_item *item;

  string_list_split(&elem_list, remote_info, ",", -1);

  for_each_string_list_item(item, &elem_list) {
    const char *elem = item->string;
    const char *p = strchr(elem, '=');

    if (!p) {
      warning(_("invalid element '%s' from remote info"), elem);
      continue;
    }

    if (skip_field_name_prefix(elem, promisor_field_name, &p))
      info->name = url_percent_decode(p);
    else if (skip_field_name_prefix(elem, promisor_field_url, &p))
      info->url = url_percent_decode(p);
    else if (skip_field_name_prefix(elem, promisor_field_filter, &p))
      info->filter = url_percent_decode(p);
    else if (skip_field_name_prefix(elem, promisor_field_token, &p))
      info->token = url_percent_decode(p);
  }

  string_list_clear(&elem_list, 0);

  if (!info->name || !info->url) {
    warning(_("server advertised a promisor remote without a name or URL: %s"),
      remote_info);
    promisor_info_free(info);
    return NULL;
  }

  return info;
}

static bool store_one_field(struct repository *repo, const char *remote_name,
          const char *field_name, const char *field_key,
          const char *advertised, const char *current)
{
  if (advertised && (!current || strcmp(current, advertised))) {
    char *key = xstrfmt("remote.%s.%s", remote_name, field_key);

    fprintf(stderr, _("Storing new %s from server for remote '%s'.\n"
          "    '%s' -> '%s'\n"),
      field_name, remote_name,
      current ? current : "",
      advertised);

    repo_config_set_gently(repo, key, advertised);
    free(key);

    return true;
  }

  return false;
}

/* Check that a filter is valid by parsing it */
static bool valid_filter(const char *filter, const char *remote_name)
{
  struct list_objects_filter_options filter_opts = LIST_OBJECTS_FILTER_INIT;
  struct strbuf err = STRBUF_INIT;
  int res = gently_parse_list_objects_filter(&filter_opts, filter, &err);

  if (res)
    warning(_("invalid filter '%s' for remote '%s' "
        "will not be stored: %s"),
      filter, remote_name, err.buf);

  list_objects_filter_release(&filter_opts);
  strbuf_release(&err);

  return !res;
}

/* Check that a token doesn't contain any control character */
static bool valid_token(const char *token, const char *remote_name)
{
  const char *c = token;

  for (; *c; c++)
    if (iscntrl(*c)) {
      warning(_("invalid token '%s' for remote '%s' "
          "will not be stored"),
        token, remote_name);
      return false;
    }

  return true;
}

struct store_info {
  struct repository *repo;
  struct string_list config_info;
  bool store_filter;
  bool store_token;
};

static struct store_info *store_info_new(struct repository *repo)
{
  struct string_list *fields_to_store = fields_stored();
  struct store_info *s = xmalloc(sizeof(*s));

  s->repo = repo;

  string_list_init_nodup(&s->config_info);
  promisor_config_info_list(repo, &s->config_info, fields_to_store);
  string_list_sort(&s->config_info);

  s->store_filter = !!string_list_lookup(fields_to_store, promisor_field_filter);
  s->store_token = !!string_list_lookup(fields_to_store, promisor_field_token);

  return s;
}

static void store_info_free(struct store_info *s)
{
  if (s) {
    promisor_info_list_clear(&s->config_info);
    free(s);
  }
}

static bool promisor_store_advertised_fields(struct promisor_info *advertised,
               struct store_info *store_info)
{
  struct promisor_info *p;
  struct string_list_item *item;
  const char *remote_name = advertised->name;
  bool reload_config = false;

  if (!(store_info->store_filter || store_info->store_token))
    return false;

  /*
   * Get existing config info for the advertised promisor
   * remote. This ensures the remote is already configured on
   * the client side.
   */
  item = string_list_lookup(&store_info->config_info, remote_name);

  if (!item)
    return false;

  p = item->util;

  if (store_info->store_filter && advertised->filter &&
      valid_filter(advertised->filter, remote_name))
    reload_config |= store_one_field(store_info->repo, remote_name,
             "filter", promisor_field_filter,
             advertised->filter, p->filter);

  if (store_info->store_token && advertised->token &&
      valid_token(advertised->token, remote_name))
    reload_config |= store_one_field(store_info->repo, remote_name,
             "token", promisor_field_token,
             advertised->token, p->token);

  return reload_config;
}

static void filter_promisor_remote(struct repository *repo,
           struct strvec *accepted,
           const char *info)
{
  const char *accept_str;
  enum accept_promisor accept = ACCEPT_NONE;
  struct string_list config_info = STRING_LIST_INIT_NODUP;
  struct string_list remote_info = STRING_LIST_INIT_DUP;
  struct store_info *store_info = NULL;
  struct string_list_item *item;
  bool reload_config = false;
  struct string_list accepted_filters = STRING_LIST_INIT_DUP;

  if (!repo_config_get_string_tmp(the_repository, "promisor.acceptfromserver", &accept_str)) {
    if (!*accept_str || !strcasecmp("None", accept_str))
      accept = ACCEPT_NONE;
    else if (!strcasecmp("KnownUrl", accept_str))
      accept = ACCEPT_KNOWN_URL;
    else if (!strcasecmp("KnownName", accept_str))
      accept = ACCEPT_KNOWN_NAME;
    else if (!strcasecmp("All", accept_str))
      accept = ACCEPT_ALL;
    else
      warning(_("unknown '%s' value for '%s' config option"),
        accept_str, "promisor.acceptfromserver");
  }

  if (accept == ACCEPT_NONE)
    return;

  /* Parse remote info received */

  string_list_split(&remote_info, info, ";", -1);

  for_each_string_list_item(item, &remote_info) {
    struct promisor_info *advertised;

    advertised = parse_one_advertised_remote(item->string);

    if (!advertised)
      continue;

    if (!config_info.nr) {
      promisor_config_info_list(repo, &config_info, fields_checked());
      string_list_sort(&config_info);
    }

    if (should_accept_remote(accept, advertised, &config_info)) {
      if (!store_info)
        store_info = store_info_new(repo);
      if (promisor_store_advertised_fields(advertised, store_info))
        reload_config = true;

      strvec_push(accepted, advertised->name);

      /* Capture advertised filters for accepted remotes */
      if (advertised->filter) {
        struct string_list_item *i;
        i = string_list_append(&accepted_filters, advertised->name);
        i->util = xstrdup(advertised->filter);
      }
    }

    promisor_info_free(advertised);
  }

  promisor_info_list_clear(&config_info);
  string_list_clear(&remote_info, 0);
  store_info_free(store_info);

  if (reload_config)
    repo_promisor_remote_reinit(repo);

  /* Apply accepted remote filters to the stable repo state */
  for_each_string_list_item(item, &accepted_filters) {
    struct promisor_remote *r = repo_promisor_remote_find(repo, item->string);
    if (r) {
      free(r->advertised_filter);
      r->advertised_filter = item->util;
      item->util = NULL;
    }
  }

  string_list_clear(&accepted_filters, 1);

  /* Mark the remotes as accepted in the repository state */
  for (size_t i = 0; i < accepted->nr; i++) {
    struct promisor_remote *r = repo_promisor_remote_find(repo, accepted->v[i]);
    if (r)
      r->accepted = 1;
  }
}

void promisor_remote_reply(const char *info, char **accepted_out)
{
  struct strvec accepted = STRVEC_INIT;

  filter_promisor_remote(the_repository, &accepted, info);

  if (accepted_out) {
    if (accepted.nr) {
      struct strbuf reply = STRBUF_INIT;
      for (size_t i = 0; i < accepted.nr; i++) {
        if (i)
          strbuf_addch(&reply, ';');
        strbuf_addstr_urlencode(&reply, accepted.v[i], allow_unsanitized);
      }
      *accepted_out = strbuf_detach(&reply, NULL);
    } else {
      *accepted_out = NULL;
    }
  }

  strvec_clear(&accepted);
}

void mark_promisor_remotes_as_accepted(struct repository *r, const char *remotes)
{
  struct string_list accepted_remotes = STRING_LIST_INIT_DUP;
  struct string_list_item *item;

  string_list_split(&accepted_remotes, remotes, ";", -1);

  for_each_string_list_item(item, &accepted_remotes) {
    char *decoded_remote = url_percent_decode(item->string);
    struct promisor_remote *p = repo_promisor_remote_find(r, decoded_remote);

    if (p)
      p->accepted = 1;
    else
      warning(_("accepted promisor remote '%s' not found"),
        decoded_remote);

    free(decoded_remote);
  }

  string_list_clear(&accepted_remotes, 0);
}

char *promisor_remote_construct_filter(struct repository *repo)
{
  struct promisor_remote *r;
  struct list_objects_filter_options filter_options = LIST_OBJECTS_FILTER_INIT;
  struct strbuf err = STRBUF_INIT;
  char *result = NULL;

  promisor_remote_init(repo);

  for (r = repo->promisor_remote_config->promisors; r; r = r->next) {
    if (r->accepted && r->advertised_filter)
      if (gently_parse_list_objects_filter(&filter_options,
                   r->advertised_filter,
                   &err)) {
        warning(_("promisor remote '%s' advertised invalid filter '%s': %s"),
          r->name, r->advertised_filter, err.buf);
        strbuf_reset(&err);
        continue;
      }
  }

  if (filter_options.choice)
    result = xstrdup(expand_list_objects_filter_spec(&filter_options));

  list_objects_filter_release(&filter_options);
  strbuf_release(&err);

  return result;
}

Coverage Report

Created: 2026-03-31 06:24