#include "path-list.h"
#include "remote.h"
#include "transport.h"
+#include "run-command.h"
+#include "parse-options.h"
+
+static const char * const builtin_fetch_usage[] = {
+ "git-fetch [options] [<repository> <refspec>...]",
+ NULL
+};
+
+enum {
+ TAGS_UNSET = 0,
+ TAGS_DEFAULT = 1,
+ TAGS_SET = 2
+};
+
+static int append, force, keep, update_head_ok, verbose, quiet;
+static int tags = TAGS_DEFAULT;
+static const char *depth;
+static const char *upload_pack;
+static struct strbuf default_rla = STRBUF_INIT;
+static struct transport *transport;
+
+static struct option builtin_fetch_options[] = {
+ OPT__QUIET(&quiet),
+ OPT__VERBOSE(&verbose),
+ OPT_BOOLEAN('a', "append", &append,
+ "append to .git/FETCH_HEAD instead of overwriting"),
+ OPT_STRING(0, "upload-pack", &upload_pack, "PATH",
+ "path to upload pack on remote end"),
+ OPT_BOOLEAN('f', "force", &force,
+ "force overwrite of local branch"),
+ OPT_SET_INT('t', "tags", &tags,
+ "fetch all tags and associated objects", TAGS_SET),
+ OPT_BOOLEAN('k', "keep", &keep, "keep downloaded pack"),
+ OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
+ "allow updating of HEAD ref"),
+ OPT_STRING(0, "depth", &depth, "DEPTH",
+ "deepen history of shallow clone"),
+ OPT_END()
+};
+
+static void unlock_pack(void)
+{
+ if (transport)
+ transport_unlock_pack(transport);
+}
-static const char fetch_usage[] = "git-fetch [-a | --append] [--upload-pack <upload-pack>] [-f | --force] [--no-tags] [-t | --tags] [-k | --keep] [-u | --update-head-ok] [--depth <depth>] [-v | --verbose] [<repository> <refspec>...]";
-
-static int append, force, tags, no_tags, update_head_ok, verbose, quiet;
-
-static int unpacklimit;
-
-static char *default_rla = NULL;
+static void unlock_pack_on_signal(int signo)
+{
+ unlock_pack();
+ signal(SIGINT, SIG_DFL);
+ raise(signo);
+}
-static void find_merge_config(struct ref *ref_map, struct remote *remote)
+static void add_merge_config(struct ref **head,
+ const struct ref *remote_refs,
+ struct branch *branch,
+ struct ref ***tail)
{
- struct ref *rm = ref_map;
- struct branch *branch = branch_get(NULL);
+ int i;
- for (rm = ref_map; rm; rm = rm->next) {
- if (!branch_has_merge_config(branch)) {
- if (remote && remote->fetch &&
- !strcmp(remote->fetch[0].src, rm->name))
- rm->merge = 1;
- } else {
- if (branch_merges(branch, rm->name))
+ for (i = 0; i < branch->merge_nr; i++) {
+ struct ref *rm, **old_tail = *tail;
+ struct refspec refspec;
+
+ for (rm = *head; rm; rm = rm->next) {
+ if (branch_merge_matches(branch, i, rm->name)) {
rm->merge = 1;
+ break;
+ }
}
+ if (rm)
+ continue;
+
+ /*
+ * Not fetched to a tracking branch? We need to fetch
+ * it anyway to allow this branch's "branch.$name.merge"
+ * to be honored by git-pull, but we do not have to
+ * fail if branch.$name.merge is misconfigured to point
+ * at a nonexisting branch. If we were indeed called by
+ * git-pull, it will notice the misconfiguration because
+ * there is no entry in the resulting FETCH_HEAD marked
+ * for merging.
+ */
+ refspec.src = branch->merge[i]->src;
+ refspec.dst = NULL;
+ refspec.pattern = 0;
+ refspec.force = 0;
+ get_fetch_map(remote_refs, &refspec, tail, 1);
+ for (rm = *old_tail; rm; rm = rm->next)
+ rm->merge = 1;
}
}
struct ref *ref_map = NULL;
struct ref **tail = &ref_map;
- struct ref *remote_refs = transport_get_remote_refs(transport);
+ const struct ref *remote_refs = transport_get_remote_refs(transport);
- if (ref_count || tags) {
+ if (ref_count || tags == TAGS_SET) {
for (i = 0; i < ref_count; i++) {
- get_fetch_map(remote_refs, &refs[i], &tail);
+ get_fetch_map(remote_refs, &refs[i], &tail, 0);
if (refs[i].dst && refs[i].dst[0])
*autotags = 1;
}
/* Merge everything on the command line, but not --tags */
for (rm = ref_map; rm; rm = rm->next)
rm->merge = 1;
- if (tags) {
+ if (tags == TAGS_SET) {
struct refspec refspec;
refspec.src = "refs/tags/";
refspec.dst = "refs/tags/";
refspec.pattern = 1;
refspec.force = 0;
- get_fetch_map(remote_refs, &refspec, &tail);
+ get_fetch_map(remote_refs, &refspec, &tail, 0);
}
} else {
/* Use the defaults */
struct remote *remote = transport->remote;
- if (remote->fetch_refspec_nr) {
+ struct branch *branch = branch_get(NULL);
+ int has_merge = branch_has_merge_config(branch);
+ if (remote && (remote->fetch_refspec_nr || has_merge)) {
for (i = 0; i < remote->fetch_refspec_nr; i++) {
- get_fetch_map(remote_refs, &remote->fetch[i], &tail);
+ get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
if (remote->fetch[i].dst &&
remote->fetch[i].dst[0])
*autotags = 1;
+ if (!i && !has_merge && ref_map &&
+ !remote->fetch[0].pattern)
+ ref_map->merge = 1;
}
- find_merge_config(ref_map, remote);
+ /*
+ * if the remote we're fetching from is the same
+ * as given in branch.<name>.remote, we add the
+ * ref given in branch.<name>.merge, too.
+ */
+ if (has_merge &&
+ !strcmp(branch->remote_name, remote->name))
+ add_merge_config(&ref_map, remote_refs, branch, &tail);
} else {
ref_map = get_remote_ref(remote_refs, "HEAD");
-
+ if (!ref_map)
+ die("Couldn't find remote ref HEAD");
ref_map->merge = 1;
}
}
+ ref_remove_duplicates(ref_map);
return ref_map;
}
-static void show_new(enum object_type type, unsigned char *sha1_new)
-{
- fprintf(stderr, " %s: %s\n", typename(type),
- find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
-}
-
static int s_update_ref(const char *action,
struct ref *ref,
int check_old)
static struct ref_lock *lock;
if (!rla)
- rla = default_rla;
+ rla = default_rla.buf;
snprintf(msg, sizeof(msg), "%s: %s", rla, action);
lock = lock_any_ref_for_update(ref->name,
check_old ? ref->old_sha1 : NULL, 0);
return 0;
}
+#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
+#define REFCOL_WIDTH 10
+
static int update_local_ref(struct ref *ref,
- const char *note,
- int verbose)
+ const char *remote,
+ int verbose,
+ char *display)
{
- char oldh[41], newh[41];
struct commit *current = NULL, *updated;
enum object_type type;
struct branch *current_branch = branch_get(NULL);
+ const char *pretty_ref = ref->name + (
+ !prefixcmp(ref->name, "refs/heads/") ? 11 :
+ !prefixcmp(ref->name, "refs/tags/") ? 10 :
+ !prefixcmp(ref->name, "refs/remotes/") ? 13 :
+ 0);
+ *display = 0;
type = sha1_object_info(ref->new_sha1, NULL);
if (type < 0)
die("object %s not found", sha1_to_hex(ref->new_sha1));
if (!*ref->name) {
/* Not storing */
- if (verbose) {
- fprintf(stderr, "* fetched %s\n", note);
- show_new(type, ref->new_sha1);
- }
+ if (verbose)
+ sprintf(display, "* branch %s -> FETCH_HEAD", remote);
return 0;
}
if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
- if (verbose) {
- fprintf(stderr, "* %s: same as %s\n",
- ref->name, note);
- show_new(type, ref->new_sha1);
- }
+ if (verbose)
+ sprintf(display, "= %-*s %-*s -> %s", SUMMARY_WIDTH,
+ "[up to date]", REFCOL_WIDTH, remote,
+ pretty_ref);
return 0;
}
- if (!strcmp(ref->name, current_branch->name) &&
+ if (current_branch &&
+ !strcmp(ref->name, current_branch->name) &&
!(update_head_ok || is_bare_repository()) &&
!is_null_sha1(ref->old_sha1)) {
/*
* If this is the head, and it's not okay to update
* the head, and the old value of the head isn't empty...
*/
- fprintf(stderr,
- " * %s: Cannot fetch into the current branch.\n",
- ref->name);
+ sprintf(display, "! %-*s %-*s -> %s (can't fetch in current branch)",
+ SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
+ pretty_ref);
return 1;
}
if (!is_null_sha1(ref->old_sha1) &&
!prefixcmp(ref->name, "refs/tags/")) {
- fprintf(stderr, "* %s: updating with %s\n",
- ref->name, note);
- show_new(type, ref->new_sha1);
+ sprintf(display, "- %-*s %-*s -> %s",
+ SUMMARY_WIDTH, "[tag update]", REFCOL_WIDTH, remote,
+ pretty_ref);
return s_update_ref("updating tag", ref, 0);
}
- current = lookup_commit_reference(ref->old_sha1);
- updated = lookup_commit_reference(ref->new_sha1);
+ current = lookup_commit_reference_gently(ref->old_sha1, 1);
+ updated = lookup_commit_reference_gently(ref->new_sha1, 1);
if (!current || !updated) {
- char *msg;
- if (!strncmp(ref->name, "refs/tags/", 10))
+ const char *msg;
+ const char *what;
+ if (!strncmp(ref->name, "refs/tags/", 10)) {
msg = "storing tag";
- else
+ what = "[new tag]";
+ }
+ else {
msg = "storing head";
- fprintf(stderr, "* %s: storing %s\n",
- ref->name, note);
- show_new(type, ref->new_sha1);
+ what = "[new branch]";
+ }
+
+ sprintf(display, "* %-*s %-*s -> %s", SUMMARY_WIDTH, what,
+ REFCOL_WIDTH, remote, pretty_ref);
return s_update_ref(msg, ref, 0);
}
- strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
- strcpy(newh, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
-
if (in_merge_bases(current, &updated, 1)) {
- fprintf(stderr, "* %s: fast forward to %s\n",
- ref->name, note);
- fprintf(stderr, " old..new: %s..%s\n", oldh, newh);
+ char quickref[83];
+ strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
+ strcat(quickref, "..");
+ strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
+ sprintf(display, " %-*s %-*s -> %s", SUMMARY_WIDTH, quickref,
+ REFCOL_WIDTH, remote, pretty_ref);
return s_update_ref("fast forward", ref, 1);
- }
- if (!force && !ref->force) {
- fprintf(stderr,
- "* %s: not updating to non-fast forward %s\n",
- ref->name, note);
- fprintf(stderr,
- " old...new: %s...%s\n", oldh, newh);
+ } else if (force || ref->force) {
+ char quickref[84];
+ strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
+ strcat(quickref, "...");
+ strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
+ sprintf(display, "+ %-*s %-*s -> %s (forced update)",
+ SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote, pretty_ref);
+ return s_update_ref("forced-update", ref, 1);
+ } else {
+ sprintf(display, "! %-*s %-*s -> %s (non fast forward)",
+ SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
+ pretty_ref);
return 1;
}
- fprintf(stderr,
- "* %s: forcing update to non-fast forward %s\n",
- ref->name, note);
- fprintf(stderr, " old...new: %s...%s\n", oldh, newh);
- return s_update_ref("forced-update", ref, 1);
}
-static void store_updated_refs(const char *url, struct ref *ref_map)
+static int store_updated_refs(const char *url, struct ref *ref_map)
{
FILE *fp;
struct commit *commit;
- int url_len, i, note_len;
+ int url_len, i, note_len, shown_url = 0;
char note[1024];
const char *what, *kind;
struct ref *rm;
+ char *filename = git_path("FETCH_HEAD");
- fp = fopen(git_path("FETCH_HEAD"), "a");
+ fp = fopen(filename, "a");
+ if (!fp)
+ return error("cannot open %s: %s\n", filename, strerror(errno));
for (rm = ref_map; rm; rm = rm->next) {
struct ref *ref = NULL;
strcpy(ref->name, rm->peer_ref->name);
hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
hashcpy(ref->new_sha1, rm->old_sha1);
- ref->force = rm->force;
+ ref->force = rm->peer_ref->force;
}
- commit = lookup_commit_reference(rm->old_sha1);
+ commit = lookup_commit_reference_gently(rm->old_sha1, 1);
if (!commit)
rm->merge = 0;
rm->merge ? "" : "not-for-merge",
note);
- if (ref)
- update_local_ref(ref, note, verbose);
+ if (ref) {
+ update_local_ref(ref, what, verbose, note);
+ if (*note) {
+ if (!shown_url) {
+ fprintf(stderr, "From %.*s\n",
+ url_len, url);
+ shown_url = 1;
+ }
+ fprintf(stderr, " %s\n", note);
+ }
+ }
}
fclose(fp);
+ return 0;
+}
+
+/*
+ * We would want to bypass the object transfer altogether if
+ * everything we are going to fetch already exists and connected
+ * locally.
+ *
+ * The refs we are going to fetch are in to_fetch (nr_heads in
+ * total). If running
+ *
+ * $ git-rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
+ *
+ * does not error out, that means everything reachable from the
+ * refs we are going to fetch exists and is connected to some of
+ * our existing refs.
+ */
+static int quickfetch(struct ref *ref_map)
+{
+ struct child_process revlist;
+ struct ref *ref;
+ char **argv;
+ int i, err;
+
+ /*
+ * If we are deepening a shallow clone we already have these
+ * objects reachable. Running rev-list here will return with
+ * a good (0) exit status and we'll bypass the fetch that we
+ * really need to perform. Claiming failure now will ensure
+ * we perform the network exchange to deepen our history.
+ */
+ if (depth)
+ return -1;
+
+ for (i = 0, ref = ref_map; ref; ref = ref->next)
+ i++;
+ if (!i)
+ return 0;
+
+ argv = xmalloc(sizeof(*argv) * (i + 6));
+ i = 0;
+ argv[i++] = xstrdup("rev-list");
+ argv[i++] = xstrdup("--quiet");
+ argv[i++] = xstrdup("--objects");
+ for (ref = ref_map; ref; ref = ref->next)
+ argv[i++] = xstrdup(sha1_to_hex(ref->old_sha1));
+ argv[i++] = xstrdup("--not");
+ argv[i++] = xstrdup("--all");
+ argv[i++] = NULL;
+
+ memset(&revlist, 0, sizeof(revlist));
+ revlist.argv = (const char**)argv;
+ revlist.git_cmd = 1;
+ revlist.no_stdin = 1;
+ revlist.no_stdout = 1;
+ revlist.no_stderr = 1;
+ err = run_command(&revlist);
+
+ for (i = 0; argv[i]; i++)
+ free(argv[i]);
+ free(argv);
+ return err;
}
static int fetch_refs(struct transport *transport, struct ref *ref_map)
{
- int ret = transport_fetch_refs(transport, ref_map);
+ int ret = quickfetch(ref_map);
+ if (ret)
+ ret = transport_fetch_refs(transport, ref_map);
if (!ret)
- store_updated_refs(transport->url, ref_map);
+ ret |= store_updated_refs(transport->url, ref_map);
+ transport_unlock_pack(transport);
return ret;
}
struct path_list new_refs = { NULL, 0, 0, 1 };
char *ref_name;
int ref_name_len;
- unsigned char *ref_sha1;
- struct ref *tag_ref;
+ const unsigned char *ref_sha1;
+ const struct ref *tag_ref;
struct ref *rm = NULL;
struct ref *ref_map = NULL;
struct ref **tail = &ref_map;
- struct ref *ref;
+ const struct ref *ref;
for_each_ref(add_existing, &existing_refs);
for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
if (!path_list_has_path(&existing_refs, ref_name) &&
!path_list_has_path(&new_refs, ref_name) &&
- lookup_object(ref->old_sha1)) {
- fprintf(stderr, "Auto-following %s\n",
- ref_name);
-
+ has_sha1_file(ref->old_sha1)) {
path_list_insert(ref_name, &new_refs);
rm = alloc_ref(strlen(ref_name) + 1);
struct ref *ref_map, *fetch_map;
struct ref *rm;
int autotags = (transport->remote->fetch_tags == 1);
- if (transport->remote->fetch_tags == 2 && !no_tags)
- tags = 1;
+ if (transport->remote->fetch_tags == 2 && tags != TAGS_UNSET)
+ tags = TAGS_SET;
if (transport->remote->fetch_tags == -1)
- no_tags = 1;
+ tags = TAGS_UNSET;
- if (!transport->ops || !transport->ops->get_refs_list ||
- !(transport->ops->fetch_refs || transport->ops->fetch_objs))
+ if (!transport->get_refs_list || !transport->fetch)
die("Don't know how to fetch from %s", transport->url);
/* if not appending, truncate FETCH_HEAD */
- if (!append)
- fclose(fopen(git_path("FETCH_HEAD"), "w"));
+ if (!append) {
+ char *filename = git_path("FETCH_HEAD");
+ FILE *fp = fopen(filename, "w");
+ if (!fp)
+ return error("cannot open %s: %s\n", filename, strerror(errno));
+ fclose(fp);
+ }
ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
for (rm = ref_map; rm; rm = rm->next) {
if (rm->peer_ref)
read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
-
- printf("%s : %s\n", rm->name, rm->peer_ref ? rm->peer_ref->name : NULL);
- printf(" < %s\n", sha1_to_hex(rm->old_sha1));
- if (rm->peer_ref)
- printf(" > %s\n", sha1_to_hex(rm->peer_ref->old_sha1));
- if (!rm->peer_ref ||
- hashcmp(rm->old_sha1, rm->peer_ref->old_sha1)) {
- printf("%s needs update.\n", rm->name);
- }
}
if (fetch_refs(transport, ref_map)) {
/* if neither --no-tags nor --tags was specified, do automated tag
* following ... */
- if (!(tags || no_tags) && autotags) {
+ if (tags == TAGS_DEFAULT && autotags) {
ref_map = find_non_local_tags(transport, fetch_map);
if (ref_map) {
transport_set_option(transport, TRANS_OPT_DEPTH, "0");
free_refs(fetch_map);
+ transport_disconnect(transport);
+
return 0;
}
-static int fetch_config(const char *var, const char *value)
+static void set_option(const char *name, const char *value)
{
- if (strcmp(var, "fetch.unpacklimit") == 0) {
- unpacklimit = git_config_int(var, value);
- return 0;
- }
-
- if (strcmp(var, "transfer.unpacklimit") == 0) {
- unpacklimit = git_config_int(var, value);
- return 0;
- }
-
- return git_default_config(var, value);
+ int r = transport_set_option(transport, name, value);
+ if (r < 0)
+ die("Option \"%s\" value \"%s\" is not valid for %s\n",
+ name, value, transport->url);
+ if (r > 0)
+ warning("Option \"%s\" is ignored for %s\n",
+ name, transport->url);
}
int cmd_fetch(int argc, const char **argv, const char *prefix)
{
struct remote *remote;
- struct transport *transport;
- int i, j, rla_offset;
+ int i;
static const char **refs = NULL;
int ref_nr = 0;
- int cmd_len = 0;
- const char *depth = NULL, *upload_pack = NULL;
- int keep = 0;
- git_config(fetch_config);
+ /* Record the command line for the reflog */
+ strbuf_addstr(&default_rla, "fetch");
+ for (i = 1; i < argc; i++)
+ strbuf_addf(&default_rla, " %s", argv[i]);
- for (i = 1; i < argc; i++) {
- const char *arg = argv[i];
- cmd_len += strlen(arg);
-
- if (arg[0] != '-')
- break;
- if (!strcmp(arg, "--append") || !strcmp(arg, "-a")) {
- append = 1;
- continue;
- }
- if (!prefixcmp(arg, "--upload-pack=")) {
- upload_pack = arg + 14;
- continue;
- }
- if (!strcmp(arg, "--upload-pack")) {
- i++;
- if (i == argc)
- usage(fetch_usage);
- upload_pack = argv[i];
- continue;
- }
- if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
- force = 1;
- continue;
- }
- if (!strcmp(arg, "--no-tags")) {
- no_tags = 1;
- continue;
- }
- if (!strcmp(arg, "--tags") || !strcmp(arg, "-t")) {
- tags = 1;
- continue;
- }
- if (!strcmp(arg, "--keep") || !strcmp(arg, "-k")) {
- keep = 1;
- continue;
- }
- if (!strcmp(arg, "--update-head-ok") || !strcmp(arg, "-u")) {
- update_head_ok = 1;
- continue;
- }
- if (!prefixcmp(arg, "--depth=")) {
- depth = arg + 8;
- continue;
- }
- if (!strcmp(arg, "--depth")) {
- i++;
- if (i == argc)
- usage(fetch_usage);
- depth = argv[i];
- continue;
- }
- if (!strcmp(arg, "--quiet")) {
- quiet = 1;
- continue;
- }
- if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
- verbose++;
- continue;
- }
- usage(fetch_usage);
- }
-
- for (j = i; j < argc; j++)
- cmd_len += strlen(argv[j]);
-
- default_rla = xmalloc(cmd_len + 5 + argc + 1);
- sprintf(default_rla, "fetch");
- rla_offset = strlen(default_rla);
- for (j = 1; j < argc; j++) {
- sprintf(default_rla + rla_offset, " %s", argv[j]);
- rla_offset += strlen(argv[j]);
- }
+ argc = parse_options(argc, argv,
+ builtin_fetch_options, builtin_fetch_usage, 0);
- if (i == argc)
+ if (argc == 0)
remote = remote_get(NULL);
else
- remote = remote_get(argv[i++]);
+ remote = remote_get(argv[0]);
- transport = transport_get(remote, remote->uri[0], 1);
+ transport = transport_get(remote, remote->url[0]);
if (verbose >= 2)
transport->verbose = 1;
if (quiet)
- transport->verbose = 0;
+ transport->verbose = -1;
if (upload_pack)
- transport_set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
+ set_option(TRANS_OPT_UPLOADPACK, upload_pack);
if (keep)
- transport_set_option(transport, TRANS_OPT_KEEP, "yes");
- transport_set_option(transport, TRANS_OPT_DEPTH, depth);
+ set_option(TRANS_OPT_KEEP, "yes");
+ if (depth)
+ set_option(TRANS_OPT_DEPTH, depth);
if (!transport->url)
die("Where do you want to fetch from today?");
- if (i < argc) {
+ if (argc > 1) {
int j = 0;
- refs = xcalloc(argc - i + 1, sizeof(const char *));
- while (i < argc) {
+ refs = xcalloc(argc + 1, sizeof(const char *));
+ for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "tag")) {
char *ref;
i++;
refs[j++] = ref;
} else
refs[j++] = argv[i];
- i++;
}
refs[j] = NULL;
ref_nr = j;
- for (j = 0; refs[j]; j++)
- printf("ref: %s\n", refs[j]);
}
+ signal(SIGINT, unlock_pack_on_signal);
+ atexit(unlock_pack);
return do_fetch(transport, parse_ref_spec(ref_nr, refs), ref_nr);
}