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fetch.c
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fetch.c
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/*
* "git fetch"
*/
#include "cache.h"
#include "config.h"
#include "repository.h"
#include "refs.h"
#include "refspec.h"
#include "object-store.h"
#include "oidset.h"
#include "commit.h"
#include "builtin.h"
#include "string-list.h"
#include "remote.h"
#include "transport.h"
#include "run-command.h"
#include "parse-options.h"
#include "sigchain.h"
#include "submodule-config.h"
#include "submodule.h"
#include "connected.h"
#include "strvec.h"
#include "utf8.h"
#include "packfile.h"
#include "list-objects-filter-options.h"
#include "commit-reach.h"
#include "branch.h"
#include "promisor-remote.h"
#include "commit-graph.h"
#include "shallow.h"
#define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
static const char * const builtin_fetch_usage[] = {
N_("git fetch [<options>] [<repository> [<refspec>...]]"),
N_("git fetch [<options>] <group>"),
N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
N_("git fetch --all [<options>]"),
NULL
};
enum {
TAGS_UNSET = 0,
TAGS_DEFAULT = 1,
TAGS_SET = 2
};
static int fetch_prune_config = -1; /* unspecified */
static int fetch_show_forced_updates = 1;
static uint64_t forced_updates_ms = 0;
static int prune = -1; /* unspecified */
#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
static int fetch_prune_tags_config = -1; /* unspecified */
static int prune_tags = -1; /* unspecified */
#define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
static int all, append, dry_run, force, keep, multiple, update_head_ok;
static int write_fetch_head = 1;
static int verbosity, deepen_relative, set_upstream;
static int progress = -1;
static int enable_auto_gc = 1;
static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
static int max_jobs = -1, submodule_fetch_jobs_config = -1;
static int fetch_parallel_config = 1;
static enum transport_family family;
static const char *depth;
static const char *deepen_since;
static const char *upload_pack;
static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
static struct strbuf default_rla = STRBUF_INIT;
static struct transport *gtransport;
static struct transport *gsecondary;
static const char *submodule_prefix = "";
static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
static int shown_url = 0;
static struct refspec refmap = REFSPEC_INIT_FETCH;
static struct list_objects_filter_options filter_options;
static struct string_list server_options = STRING_LIST_INIT_DUP;
static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
static int fetch_write_commit_graph = -1;
static int stdin_refspecs = 0;
static int git_fetch_config(const char *k, const char *v, void *cb)
{
if (!strcmp(k, "fetch.prune")) {
fetch_prune_config = git_config_bool(k, v);
return 0;
}
if (!strcmp(k, "fetch.prunetags")) {
fetch_prune_tags_config = git_config_bool(k, v);
return 0;
}
if (!strcmp(k, "fetch.showforcedupdates")) {
fetch_show_forced_updates = git_config_bool(k, v);
return 0;
}
if (!strcmp(k, "submodule.recurse")) {
int r = git_config_bool(k, v) ?
RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
recurse_submodules = r;
}
if (!strcmp(k, "submodule.fetchjobs")) {
submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
return 0;
} else if (!strcmp(k, "fetch.recursesubmodules")) {
recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
return 0;
}
if (!strcmp(k, "fetch.parallel")) {
fetch_parallel_config = git_config_int(k, v);
if (fetch_parallel_config < 0)
die(_("fetch.parallel cannot be negative"));
return 0;
}
return git_default_config(k, v, cb);
}
static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
{
BUG_ON_OPT_NEG(unset);
/*
* "git fetch --refmap='' origin foo"
* can be used to tell the command not to store anywhere
*/
refspec_append(&refmap, arg);
return 0;
}
static struct option builtin_fetch_options[] = {
OPT__VERBOSITY(&verbosity),
OPT_BOOL(0, "all", &all,
N_("fetch from all remotes")),
OPT_BOOL(0, "set-upstream", &set_upstream,
N_("set upstream for git pull/fetch")),
OPT_BOOL('a', "append", &append,
N_("append to .git/FETCH_HEAD instead of overwriting")),
OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
N_("path to upload pack on remote end")),
OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
OPT_BOOL('m', "multiple", &multiple,
N_("fetch from multiple remotes")),
OPT_SET_INT('t', "tags", &tags,
N_("fetch all tags and associated objects"), TAGS_SET),
OPT_SET_INT('n', NULL, &tags,
N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
OPT_INTEGER('j', "jobs", &max_jobs,
N_("number of submodules fetched in parallel")),
OPT_BOOL('p', "prune", &prune,
N_("prune remote-tracking branches no longer on remote")),
OPT_BOOL('P', "prune-tags", &prune_tags,
N_("prune local tags no longer on remote and clobber changed tags")),
OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
N_("control recursive fetching of submodules"),
PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
OPT_BOOL(0, "dry-run", &dry_run,
N_("dry run")),
OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
N_("write fetched references to the FETCH_HEAD file")),
OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
OPT_BOOL('u', "update-head-ok", &update_head_ok,
N_("allow updating of HEAD ref")),
OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
OPT_STRING(0, "depth", &depth, N_("depth"),
N_("deepen history of shallow clone")),
OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
N_("deepen history of shallow repository based on time")),
OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
N_("deepen history of shallow clone, excluding rev")),
OPT_INTEGER(0, "deepen", &deepen_relative,
N_("deepen history of shallow clone")),
OPT_SET_INT_F(0, "unshallow", &unshallow,
N_("convert to a complete repository"),
1, PARSE_OPT_NONEG),
{ OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
OPT_CALLBACK_F(0, "recurse-submodules-default",
&recurse_submodules_default, N_("on-demand"),
N_("default for recursive fetching of submodules "
"(lower priority than config files)"),
PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
OPT_BOOL(0, "update-shallow", &update_shallow,
N_("accept refs that update .git/shallow")),
OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
TRANSPORT_FAMILY_IPV4),
OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
TRANSPORT_FAMILY_IPV6),
OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
N_("report that we have only objects reachable from this object")),
OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
N_("run 'maintenance --auto' after fetching")),
OPT_BOOL(0, "auto-gc", &enable_auto_gc,
N_("run 'maintenance --auto' after fetching")),
OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
N_("check for forced-updates on all updated branches")),
OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
N_("write the commit-graph after fetching")),
OPT_BOOL(0, "stdin", &stdin_refspecs,
N_("accept refspecs from stdin")),
OPT_END()
};
static void unlock_pack(void)
{
if (gtransport)
transport_unlock_pack(gtransport);
if (gsecondary)
transport_unlock_pack(gsecondary);
}
static void unlock_pack_on_signal(int signo)
{
unlock_pack();
sigchain_pop(signo);
raise(signo);
}
static void add_merge_config(struct ref **head,
const struct ref *remote_refs,
struct branch *branch,
struct ref ***tail)
{
int i;
for (i = 0; i < branch->merge_nr; i++) {
struct ref *rm, **old_tail = *tail;
struct refspec_item refspec;
for (rm = *head; rm; rm = rm->next) {
if (branch_merge_matches(branch, i, rm->name)) {
rm->fetch_head_status = FETCH_HEAD_MERGE;
break;
}
}
if (rm)
continue;
/*
* Not fetched to a remote-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.
*/
memset(&refspec, 0, sizeof(refspec));
refspec.src = branch->merge[i]->src;
get_fetch_map(remote_refs, &refspec, tail, 1);
for (rm = *old_tail; rm; rm = rm->next)
rm->fetch_head_status = FETCH_HEAD_MERGE;
}
}
static void create_fetch_oidset(struct ref **head, struct oidset *out)
{
struct ref *rm = *head;
while (rm) {
oidset_insert(out, &rm->old_oid);
rm = rm->next;
}
}
struct refname_hash_entry {
struct hashmap_entry ent;
struct object_id oid;
int ignore;
char refname[FLEX_ARRAY];
};
static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
const struct hashmap_entry *eptr,
const struct hashmap_entry *entry_or_key,
const void *keydata)
{
const struct refname_hash_entry *e1, *e2;
e1 = container_of(eptr, const struct refname_hash_entry, ent);
e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
return strcmp(e1->refname, keydata ? keydata : e2->refname);
}
static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
const char *refname,
const struct object_id *oid)
{
struct refname_hash_entry *ent;
size_t len = strlen(refname);
FLEX_ALLOC_MEM(ent, refname, refname, len);
hashmap_entry_init(&ent->ent, strhash(refname));
oidcpy(&ent->oid, oid);
hashmap_add(map, &ent->ent);
return ent;
}
static int add_one_refname(const char *refname,
const struct object_id *oid,
int flag, void *cbdata)
{
struct hashmap *refname_map = cbdata;
(void) refname_hash_add(refname_map, refname, oid);
return 0;
}
static void refname_hash_init(struct hashmap *map)
{
hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
}
static int refname_hash_exists(struct hashmap *map, const char *refname)
{
return !!hashmap_get_from_hash(map, strhash(refname), refname);
}
static void clear_item(struct refname_hash_entry *item)
{
item->ignore = 1;
}
static void find_non_local_tags(const struct ref *refs,
struct ref **head,
struct ref ***tail)
{
struct hashmap existing_refs;
struct hashmap remote_refs;
struct oidset fetch_oids = OIDSET_INIT;
struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
struct string_list_item *remote_ref_item;
const struct ref *ref;
struct refname_hash_entry *item = NULL;
const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
refname_hash_init(&existing_refs);
refname_hash_init(&remote_refs);
create_fetch_oidset(head, &fetch_oids);
for_each_ref(add_one_refname, &existing_refs);
for (ref = refs; ref; ref = ref->next) {
if (!starts_with(ref->name, "refs/tags/"))
continue;
/*
* The peeled ref always follows the matching base
* ref, so if we see a peeled ref that we don't want
* to fetch then we can mark the ref entry in the list
* as one to ignore by setting util to NULL.
*/
if (ends_with(ref->name, "^{}")) {
if (item &&
!has_object_file_with_flags(&ref->old_oid, quick_flags) &&
!oidset_contains(&fetch_oids, &ref->old_oid) &&
!has_object_file_with_flags(&item->oid, quick_flags) &&
!oidset_contains(&fetch_oids, &item->oid))
clear_item(item);
item = NULL;
continue;
}
/*
* If item is non-NULL here, then we previously saw a
* ref not followed by a peeled reference, so we need
* to check if it is a lightweight tag that we want to
* fetch.
*/
if (item &&
!has_object_file_with_flags(&item->oid, quick_flags) &&
!oidset_contains(&fetch_oids, &item->oid))
clear_item(item);
item = NULL;
/* skip duplicates and refs that we already have */
if (refname_hash_exists(&remote_refs, ref->name) ||
refname_hash_exists(&existing_refs, ref->name))
continue;
item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
string_list_insert(&remote_refs_list, ref->name);
}
hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
/*
* We may have a final lightweight tag that needs to be
* checked to see if it needs fetching.
*/
if (item &&
!has_object_file_with_flags(&item->oid, quick_flags) &&
!oidset_contains(&fetch_oids, &item->oid))
clear_item(item);
/*
* For all the tags in the remote_refs_list,
* add them to the list of refs to be fetched
*/
for_each_string_list_item(remote_ref_item, &remote_refs_list) {
const char *refname = remote_ref_item->string;
struct ref *rm;
unsigned int hash = strhash(refname);
item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
struct refname_hash_entry, ent);
if (!item)
BUG("unseen remote ref?");
/* Unless we have already decided to ignore this item... */
if (item->ignore)
continue;
rm = alloc_ref(item->refname);
rm->peer_ref = alloc_ref(item->refname);
oidcpy(&rm->old_oid, &item->oid);
**tail = rm;
*tail = &rm->next;
}
hashmap_clear_and_free(&remote_refs, struct refname_hash_entry, ent);
string_list_clear(&remote_refs_list, 0);
oidset_clear(&fetch_oids);
}
static struct ref *get_ref_map(struct remote *remote,
const struct ref *remote_refs,
struct refspec *rs,
int tags, int *autotags)
{
int i;
struct ref *rm;
struct ref *ref_map = NULL;
struct ref **tail = &ref_map;
/* opportunistically-updated references: */
struct ref *orefs = NULL, **oref_tail = &orefs;
struct hashmap existing_refs;
int existing_refs_populated = 0;
if (rs->nr) {
struct refspec *fetch_refspec;
for (i = 0; i < rs->nr; i++) {
get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
if (rs->items[i].dst && rs->items[i].dst[0])
*autotags = 1;
}
/* Merge everything on the command line (but not --tags) */
for (rm = ref_map; rm; rm = rm->next)
rm->fetch_head_status = FETCH_HEAD_MERGE;
/*
* For any refs that we happen to be fetching via
* command-line arguments, the destination ref might
* have been missing or have been different than the
* remote-tracking ref that would be derived from the
* configured refspec. In these cases, we want to
* take the opportunity to update their configured
* remote-tracking reference. However, we do not want
* to mention these entries in FETCH_HEAD at all, as
* they would simply be duplicates of existing
* entries, so we set them FETCH_HEAD_IGNORE below.
*
* We compute these entries now, based only on the
* refspecs specified on the command line. But we add
* them to the list following the refspecs resulting
* from the tags option so that one of the latter,
* which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
* by ref_remove_duplicates() in favor of one of these
* opportunistic entries with FETCH_HEAD_IGNORE.
*/
if (refmap.nr)
fetch_refspec = &refmap;
else
fetch_refspec = &remote->fetch;
for (i = 0; i < fetch_refspec->nr; i++)
get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
} else if (refmap.nr) {
die("--refmap option is only meaningful with command-line refspec(s).");
} else {
/* Use the defaults */
struct branch *branch = branch_get(NULL);
int has_merge = branch_has_merge_config(branch);
if (remote &&
(remote->fetch.nr ||
/* Note: has_merge implies non-NULL branch->remote_name */
(has_merge && !strcmp(branch->remote_name, remote->name)))) {
for (i = 0; i < remote->fetch.nr; i++) {
get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
if (remote->fetch.items[i].dst &&
remote->fetch.items[i].dst[0])
*autotags = 1;
if (!i && !has_merge && ref_map &&
!remote->fetch.items[0].pattern)
ref_map->fetch_head_status = FETCH_HEAD_MERGE;
}
/*
* 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.
*
* Note: has_merge implies non-NULL branch->remote_name
*/
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->fetch_head_status = FETCH_HEAD_MERGE;
tail = &ref_map->next;
}
}
if (tags == TAGS_SET)
/* also fetch all tags */
get_fetch_map(remote_refs, tag_refspec, &tail, 0);
else if (tags == TAGS_DEFAULT && *autotags)
find_non_local_tags(remote_refs, &ref_map, &tail);
/* Now append any refs to be updated opportunistically: */
*tail = orefs;
for (rm = orefs; rm; rm = rm->next) {
rm->fetch_head_status = FETCH_HEAD_IGNORE;
tail = &rm->next;
}
/*
* apply negative refspecs first, before we remove duplicates. This is
* necessary as negative refspecs might remove an otherwise conflicting
* duplicate.
*/
if (rs->nr)
ref_map = apply_negative_refspecs(ref_map, rs);
else
ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
ref_map = ref_remove_duplicates(ref_map);
for (rm = ref_map; rm; rm = rm->next) {
if (rm->peer_ref) {
const char *refname = rm->peer_ref->name;
struct refname_hash_entry *peer_item;
unsigned int hash = strhash(refname);
if (!existing_refs_populated) {
refname_hash_init(&existing_refs);
for_each_ref(add_one_refname, &existing_refs);
existing_refs_populated = 1;
}
peer_item = hashmap_get_entry_from_hash(&existing_refs,
hash, refname,
struct refname_hash_entry, ent);
if (peer_item) {
struct object_id *old_oid = &peer_item->oid;
oidcpy(&rm->peer_ref->old_oid, old_oid);
}
}
}
if (existing_refs_populated)
hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
return ref_map;
}
#define STORE_REF_ERROR_OTHER 1
#define STORE_REF_ERROR_DF_CONFLICT 2
static int s_update_ref(const char *action,
struct ref *ref,
int check_old)
{
char *msg;
char *rla = getenv("GIT_REFLOG_ACTION");
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
int ret, df_conflict = 0;
if (dry_run)
return 0;
if (!rla)
rla = default_rla.buf;
msg = xstrfmt("%s: %s", rla, action);
transaction = ref_transaction_begin(&err);
if (!transaction ||
ref_transaction_update(transaction, ref->name,
&ref->new_oid,
check_old ? &ref->old_oid : NULL,
0, msg, &err))
goto fail;
ret = ref_transaction_commit(transaction, &err);
if (ret) {
df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
goto fail;
}
ref_transaction_free(transaction);
strbuf_release(&err);
free(msg);
return 0;
fail:
ref_transaction_free(transaction);
error("%s", err.buf);
strbuf_release(&err);
free(msg);
return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
: STORE_REF_ERROR_OTHER;
}
static int refcol_width = 10;
static int compact_format;
static void adjust_refcol_width(const struct ref *ref)
{
int max, rlen, llen, len;
/* uptodate lines are only shown on high verbosity level */
if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
return;
max = term_columns();
rlen = utf8_strwidth(prettify_refname(ref->name));
llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
/*
* rough estimation to see if the output line is too long and
* should not be counted (we can't do precise calculation
* anyway because we don't know if the error explanation part
* will be printed in update_local_ref)
*/
if (compact_format) {
llen = 0;
max = max * 2 / 3;
}
len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
if (len >= max)
return;
/*
* Not precise calculation for compact mode because '*' can
* appear on the left hand side of '->' and shrink the column
* back.
*/
if (refcol_width < rlen)
refcol_width = rlen;
}
static void prepare_format_display(struct ref *ref_map)
{
struct ref *rm;
const char *format = "full";
git_config_get_string_tmp("fetch.output", &format);
if (!strcasecmp(format, "full"))
compact_format = 0;
else if (!strcasecmp(format, "compact"))
compact_format = 1;
else
die(_("configuration fetch.output contains invalid value %s"),
format);
for (rm = ref_map; rm; rm = rm->next) {
if (rm->status == REF_STATUS_REJECT_SHALLOW ||
!rm->peer_ref ||
!strcmp(rm->name, "HEAD"))
continue;
adjust_refcol_width(rm);
}
}
static void print_remote_to_local(struct strbuf *display,
const char *remote, const char *local)
{
strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
}
static int find_and_replace(struct strbuf *haystack,
const char *needle,
const char *placeholder)
{
const char *p = NULL;
int plen, nlen;
nlen = strlen(needle);
if (ends_with(haystack->buf, needle))
p = haystack->buf + haystack->len - nlen;
else
p = strstr(haystack->buf, needle);
if (!p)
return 0;
if (p > haystack->buf && p[-1] != '/')
return 0;
plen = strlen(p);
if (plen > nlen && p[nlen] != '/')
return 0;
strbuf_splice(haystack, p - haystack->buf, nlen,
placeholder, strlen(placeholder));
return 1;
}
static void print_compact(struct strbuf *display,
const char *remote, const char *local)
{
struct strbuf r = STRBUF_INIT;
struct strbuf l = STRBUF_INIT;
if (!strcmp(remote, local)) {
strbuf_addf(display, "%-*s -> *", refcol_width, remote);
return;
}
strbuf_addstr(&r, remote);
strbuf_addstr(&l, local);
if (!find_and_replace(&r, local, "*"))
find_and_replace(&l, remote, "*");
print_remote_to_local(display, r.buf, l.buf);
strbuf_release(&r);
strbuf_release(&l);
}
static void format_display(struct strbuf *display, char code,
const char *summary, const char *error,
const char *remote, const char *local,
int summary_width)
{
int width = (summary_width + strlen(summary) - gettext_width(summary));
strbuf_addf(display, "%c %-*s ", code, width, summary);
if (!compact_format)
print_remote_to_local(display, remote, local);
else
print_compact(display, remote, local);
if (error)
strbuf_addf(display, " (%s)", error);
}
static int update_local_ref(struct ref *ref,
const char *remote,
const struct ref *remote_ref,
struct strbuf *display,
int summary_width)
{
struct commit *current = NULL, *updated;
enum object_type type;
struct branch *current_branch = branch_get(NULL);
const char *pretty_ref = prettify_refname(ref->name);
int fast_forward = 0;
type = oid_object_info(the_repository, &ref->new_oid, NULL);
if (type < 0)
die(_("object %s not found"), oid_to_hex(&ref->new_oid));
if (oideq(&ref->old_oid, &ref->new_oid)) {
if (verbosity > 0)
format_display(display, '=', _("[up to date]"), NULL,
remote, pretty_ref, summary_width);
return 0;
}
if (current_branch &&
!strcmp(ref->name, current_branch->name) &&
!(update_head_ok || is_bare_repository()) &&
!is_null_oid(&ref->old_oid)) {
/*
* If this is the head, and it's not okay to update
* the head, and the old value of the head isn't empty...
*/
format_display(display, '!', _("[rejected]"),
_("can't fetch in current branch"),
remote, pretty_ref, summary_width);
return 1;
}
if (!is_null_oid(&ref->old_oid) &&
starts_with(ref->name, "refs/tags/")) {
if (force || ref->force) {
int r;
r = s_update_ref("updating tag", ref, 0);
format_display(display, r ? '!' : 't', _("[tag update]"),
r ? _("unable to update local ref") : NULL,
remote, pretty_ref, summary_width);
return r;
} else {
format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
remote, pretty_ref, summary_width);
return 1;
}
}
current = lookup_commit_reference_gently(the_repository,
&ref->old_oid, 1);
updated = lookup_commit_reference_gently(the_repository,
&ref->new_oid, 1);
if (!current || !updated) {
const char *msg;
const char *what;
int r;
/*
* Nicely describe the new ref we're fetching.
* Base this on the remote's ref name, as it's
* more likely to follow a standard layout.
*/
const char *name = remote_ref ? remote_ref->name : "";
if (starts_with(name, "refs/tags/")) {
msg = "storing tag";
what = _("[new tag]");
} else if (starts_with(name, "refs/heads/")) {
msg = "storing head";
what = _("[new branch]");
} else {
msg = "storing ref";
what = _("[new ref]");
}
r = s_update_ref(msg, ref, 0);
format_display(display, r ? '!' : '*', what,
r ? _("unable to update local ref") : NULL,
remote, pretty_ref, summary_width);
return r;
}
if (fetch_show_forced_updates) {
uint64_t t_before = getnanotime();
fast_forward = in_merge_bases(current, updated);
forced_updates_ms += (getnanotime() - t_before) / 1000000;
} else {
fast_forward = 1;
}
if (fast_forward) {
struct strbuf quickref = STRBUF_INIT;
int r;
strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV);
strbuf_addstr(&quickref, "..");
strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
r = s_update_ref("fast-forward", ref, 1);
format_display(display, r ? '!' : ' ', quickref.buf,
r ? _("unable to update local ref") : NULL,
remote, pretty_ref, summary_width);
strbuf_release(&quickref);
return r;
} else if (force || ref->force) {
struct strbuf quickref = STRBUF_INIT;
int r;
strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV);
strbuf_addstr(&quickref, "...");
strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
r = s_update_ref("forced-update", ref, 1);
format_display(display, r ? '!' : '+', quickref.buf,
r ? _("unable to update local ref") : _("forced update"),
remote, pretty_ref, summary_width);
strbuf_release(&quickref);
return r;
} else {
format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
remote, pretty_ref, summary_width);
return 1;
}
}
static int iterate_ref_map(void *cb_data, struct object_id *oid)
{
struct ref **rm = cb_data;
struct ref *ref = *rm;
while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
ref = ref->next;
if (!ref)
return -1; /* end of the list */
*rm = ref->next;
oidcpy(oid, &ref->old_oid);
return 0;
}
static const char warn_show_forced_updates[] =
N_("Fetch normally indicates which branches had a forced update,\n"
"but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
"flag or run 'git config fetch.showForcedUpdates true'.");
static const char warn_time_show_forced_updates[] =
N_("It took %.2f seconds to check forced updates. You can use\n"
"'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
" to avoid this check.\n");
static int store_updated_refs(const char *raw_url, const char *remote_name,
int connectivity_checked, struct ref *ref_map)
{
FILE *fp;
struct commit *commit;
int url_len, i, rc = 0;
struct strbuf note = STRBUF_INIT;
const char *what, *kind;
struct ref *rm;
char *url;
const char *filename = (!write_fetch_head
? "/dev/null"
: git_path_fetch_head(the_repository));
int want_status;
int summary_width = transport_summary_width(ref_map);
fp = fopen(filename, "a");
if (!fp)
return error_errno(_("cannot open %s"), filename);
if (raw_url)
url = transport_anonymize_url(raw_url);
else
url = xstrdup("foreign");
if (!connectivity_checked) {
struct check_connected_options opt = CHECK_CONNECTED_INIT;
rm = ref_map;
if (check_connected(iterate_ref_map, &rm, &opt)) {
rc = error(_("%s did not send all necessary objects\n"), url);
goto abort;
}
}
prepare_format_display(ref_map);
/*
* We do a pass for each fetch_head_status type in their enum order, so
* merged entries are written before not-for-merge. That lets readers
* use FETCH_HEAD as a refname to refer to the ref to be merged.
*/
for (want_status = FETCH_HEAD_MERGE;
want_status <= FETCH_HEAD_IGNORE;
want_status++) {
for (rm = ref_map; rm; rm = rm->next) {
struct ref *ref = NULL;
const char *merge_status_marker = "";
if (rm->status == REF_STATUS_REJECT_SHALLOW) {
if (want_status == FETCH_HEAD_MERGE)
warning(_("reject %s because shallow roots are not allowed to be updated"),
rm->peer_ref ? rm->peer_ref->name : rm->name);
continue;
}
commit = lookup_commit_reference_gently(the_repository,
&rm->old_oid,
1);
if (!commit)
rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
if (rm->fetch_head_status != want_status)
continue;
if (rm->peer_ref) {
ref = alloc_ref(rm->peer_ref->name);
oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
oidcpy(&ref->new_oid, &rm->old_oid);
ref->force = rm->peer_ref->force;
}
if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
(!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
check_for_new_submodule_commits(&rm->old_oid);
}
if (!strcmp(rm->name, "HEAD")) {
kind = "";
what = "";
}
else if (skip_prefix(rm->name, "refs/heads/", &what))
kind = "branch";
else if (skip_prefix(rm->name, "refs/tags/", &what))
kind = "tag";
else if (skip_prefix(rm->name, "refs/remotes/", &what))
kind = "remote-tracking branch";
else {
kind = "";
what = rm->name;
}