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3836d88ae5
git-commit-vandalism/builtin/fetch.c
Jonathan Tan 3836d88ae5 pack: move pack-closing functions 
The function close_pack_fd() needs to be temporarily made global. Its
scope will be restored to static in a subsequent commit.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-23 15:12:06 -07:00

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/*
* "git fetch"
*/
#include "cache.h"
#include "config.h"
#include "refs.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 "argv-array.h"
#include "utf8.h"
#include "packfile.h"
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 prune = -1; /* unspecified */
#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
static int progress = -1;
static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
static int max_children = 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 int refmap_alloc, refmap_nr;
static const char **refmap_array;
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, "submodule.recurse")) {
int r = git_config_bool(k, v) ?
RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
recurse_submodules = r;
}
if (!strcmp(k, "submodule.fetchjobs")) {
max_children = parse_submodule_fetchjobs(k, v);
return 0;
} else if (!strcmp(k, "fetch.recursesubmodules")) {
recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
return 0;
}
return git_default_config(k, v, cb);
}
static int gitmodules_fetch_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "submodule.fetchjobs")) {
max_children = parse_submodule_fetchjobs(var, value);
return 0;
} else if (!strcmp(var, "fetch.recursesubmodules")) {
recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
return 0;
}
return 0;
}
static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
{
ALLOC_GROW(refmap_array, refmap_nr + 1, refmap_alloc);
/*
* "git fetch --refmap='' origin foo"
* can be used to tell the command not to store anywhere
*/
if (*arg)
refmap_array[refmap_nr++] = arg;
return 0;
}
static struct option builtin_fetch_options[] = {
OPT__VERBOSITY(&verbosity),
OPT_BOOL(0, "all", &all,
N_("fetch from all remotes")),
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 branch")),
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_children,
N_("number of submodules fetched in parallel")),
OPT_BOOL('p', "prune", &prune,
N_("prune remote-tracking branches no longer on remote")),
{ OPTION_CALLBACK, 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('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")),
{ OPTION_SET_INT, 0, "unshallow", &unshallow, NULL,
N_("convert to a complete repository"),
PARSE_OPT_NONEG | PARSE_OPT_NOARG, NULL, 1 },
{ OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
{ OPTION_CALLBACK, 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")),
{ OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
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_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 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 int add_existing(const char *refname, const struct object_id *oid,
int flag, void *cbdata)
{
struct string_list *list = (struct string_list *)cbdata;
struct string_list_item *item = string_list_insert(list, refname);
struct object_id *old_oid = xmalloc(sizeof(*old_oid));
oidcpy(old_oid, oid);
item->util = old_oid;
return 0;
}
static int will_fetch(struct ref **head, const unsigned char *sha1)
{
struct ref *rm = *head;
while (rm) {
if (!hashcmp(rm->old_oid.hash, sha1))
return 1;
rm = rm->next;
}
return 0;
}
static void find_non_local_tags(struct transport *transport,
struct ref **head,
struct ref ***tail)
{
struct string_list existing_refs = STRING_LIST_INIT_DUP;
struct string_list remote_refs = STRING_LIST_INIT_NODUP;
const struct ref *ref;
struct string_list_item *item = NULL;
for_each_ref(add_existing, &existing_refs);
for (ref = transport_get_remote_refs(transport); 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,
OBJECT_INFO_QUICK) &&
!will_fetch(head, ref->old_oid.hash) &&
!has_sha1_file_with_flags(item->util,
OBJECT_INFO_QUICK) &&
!will_fetch(head, item->util))
item->util = NULL;
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_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
!will_fetch(head, item->util))
item->util = NULL;
item = NULL;
/* skip duplicates and refs that we already have */
if (string_list_has_string(&remote_refs, ref->name) ||
string_list_has_string(&existing_refs, ref->name))
continue;
item = string_list_insert(&remote_refs, ref->name);
item->util = (void *)&ref->old_oid;
}
string_list_clear(&existing_refs, 1);
/*
* We may have a final lightweight tag that needs to be
* checked to see if it needs fetching.
*/
if (item &&
!has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
!will_fetch(head, item->util))
item->util = NULL;
/*
* For all the tags in the remote_refs string list,
* add them to the list of refs to be fetched
*/
for_each_string_list_item(item, &remote_refs) {
/* Unless we have already decided to ignore this item... */
if (item->util)
{
struct ref *rm = alloc_ref(item->string);
rm->peer_ref = alloc_ref(item->string);
oidcpy(&rm->old_oid, item->util);
**tail = rm;
*tail = &rm->next;
}
}
string_list_clear(&remote_refs, 0);
}
static struct ref *get_ref_map(struct transport *transport,
struct refspec *refspecs, int refspec_count,
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;
const struct ref *remote_refs = transport_get_remote_refs(transport);
if (refspec_count) {
struct refspec *fetch_refspec;
int fetch_refspec_nr;
for (i = 0; i < refspec_count; i++) {
get_fetch_map(remote_refs, &refspecs[i], &tail, 0);
if (refspecs[i].dst && refspecs[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_array) {
fetch_refspec = parse_fetch_refspec(refmap_nr, refmap_array);
fetch_refspec_nr = refmap_nr;
} else {
fetch_refspec = transport->remote->fetch;
fetch_refspec_nr = transport->remote->fetch_refspec_nr;
}
for (i = 0; i < fetch_refspec_nr; i++)
get_fetch_map(ref_map, &fetch_refspec[i], &oref_tail, 1);
} else if (refmap_array) {
die("--refmap option is only meaningful with command-line refspec(s).");
} else {
/* Use the defaults */
struct remote *remote = transport->remote;
struct branch *branch = branch_get(NULL);
int has_merge = branch_has_merge_config(branch);
if (remote &&
(remote->fetch_refspec_nr ||
/* Note: has_merge implies non-NULL branch->remote_name */
(has_merge && !strcmp(branch->remote_name, remote->name)))) {
for (i = 0; i < remote->fetch_refspec_nr; i++) {
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->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(transport, &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;
}
return ref_remove_duplicates(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.hash,
check_old ? ref->old_oid.hash : 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 && !oidcmp(&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_const("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 = strstr(haystack->buf, needle);
int plen, nlen;
if (!p)
return 0;
if (p > haystack->buf && p[-1] != '/')
return 0;
plen = strlen(p);
nlen = strlen(needle);
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);
type = sha1_object_info(ref->new_oid.hash, NULL);
if (type < 0)
die(_("object %s not found"), oid_to_hex(&ref->new_oid));
if (!oidcmp(&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/")) {
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;
}
current = lookup_commit_reference_gently(&ref->old_oid, 1);
updated = lookup_commit_reference_gently(&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]");
}
if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
(recurse_submodules != RECURSE_SUBMODULES_ON))
check_for_new_submodule_commits(&ref->new_oid);
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 (in_merge_bases(current, updated)) {
struct strbuf quickref = STRBUF_INIT;
int r;
strbuf_add_unique_abbrev(&quickref, current->object.oid.hash, DEFAULT_ABBREV);
strbuf_addstr(&quickref, "..");
strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
(recurse_submodules != RECURSE_SUBMODULES_ON))
check_for_new_submodule_commits(&ref->new_oid);
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, current->object.oid.hash, DEFAULT_ABBREV);
strbuf_addstr(&quickref, "...");
strbuf_add_unique_abbrev(&quickref, ref->new_oid.hash, DEFAULT_ABBREV);
if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
(recurse_submodules != RECURSE_SUBMODULES_ON))
check_for_new_submodule_commits(&ref->new_oid);
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, unsigned char sha1[20])
{
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;
hashcpy(sha1, ref->old_oid.hash);
return 0;
}
static int store_updated_refs(const char *raw_url, const char *remote_name,
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 = dry_run ? "/dev/null" : git_path_fetch_head();
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");
rm = ref_map;
if (check_connected(iterate_ref_map, &rm, NULL)) {
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(&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 (!strcmp(rm->name, "HEAD")) {
kind = "";
what = "";
}
else if (starts_with(rm->name, "refs/heads/")) {
kind = "branch";
what = rm->name + 11;
}
else if (starts_with(rm->name, "refs/tags/")) {
kind = "tag";
what = rm->name + 10;
}
else if (starts_with(rm->name, "refs/remotes/")) {
kind = "remote-tracking branch";
what = rm->name + 13;
}
else {
kind = "";
what = rm->name;
}
url_len = strlen(url);
for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
;
url_len = i + 1;
if (4 < i && !strncmp(".git", url + i - 3, 4))
url_len = i - 3;
strbuf_reset(&note);
if (*what) {
if (*kind)
strbuf_addf(&note, "%s ", kind);
strbuf_addf(&note, "'%s' of ", what);
}
switch (rm->fetch_head_status) {
case FETCH_HEAD_NOT_FOR_MERGE:
merge_status_marker = "not-for-merge";
/* fall-through */
case FETCH_HEAD_MERGE:
fprintf(fp, "%s\t%s\t%s",
oid_to_hex(&rm->old_oid),
merge_status_marker,
note.buf);
for (i = 0; i < url_len; ++i)
if ('\n' == url[i])
fputs("\\n", fp);
else
fputc(url[i], fp);
fputc('\n', fp);
break;
default:
/* do not write anything to FETCH_HEAD */
break;
}
strbuf_reset(&note);
if (ref) {
rc |= update_local_ref(ref, what, rm, &note,
summary_width);
free(ref);
} else
format_display(&note, '*',
*kind ? kind : "branch", NULL,
*what ? what : "HEAD",
"FETCH_HEAD", summary_width);
if (note.len) {
if (verbosity >= 0 && !shown_url) {
fprintf(stderr, _("From %.*s\n"),
url_len, url);
shown_url = 1;
}
if (verbosity >= 0)
fprintf(stderr, " %s\n", note.buf);
}
}
}
if (rc & STORE_REF_ERROR_DF_CONFLICT)
error(_("some local refs could not be updated; try running\n"
" 'git remote prune %s' to remove any old, conflicting "
"branches"), remote_name);
abort:
strbuf_release(&note);
free(url);
fclose(fp);
return rc;
}
/*
* We would want to bypass the object transfer altogether if
* everything we are going to fetch already exists and is connected
* locally.
*/
static int quickfetch(struct ref *ref_map)
{
struct ref *rm = ref_map;
struct check_connected_options opt = CHECK_CONNECTED_INIT;
/*
* 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 (deepen)
return -1;
opt.quiet = 1;
return check_connected(iterate_ref_map, &rm, &opt);
}
static int fetch_refs(struct transport *transport, struct ref *ref_map)
{
int ret = quickfetch(ref_map);
if (ret)
ret = transport_fetch_refs(transport, ref_map);
if (!ret)
ret |= store_updated_refs(transport->url,
transport->remote->name,
ref_map);
transport_unlock_pack(transport);
return ret;
}
static int prune_refs(struct refspec *refs, int ref_count, struct ref *ref_map,
const char *raw_url)
{
int url_len, i, result = 0;
struct ref *ref, *stale_refs = get_stale_heads(refs, ref_count, ref_map);
char *url;
int summary_width = transport_summary_width(stale_refs);
const char *dangling_msg = dry_run
? _(" (%s will become dangling)")
: _(" (%s has become dangling)");
if (raw_url)
url = transport_anonymize_url(raw_url);
else
url = xstrdup("foreign");
url_len = strlen(url);
for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
;
url_len = i + 1;
if (4 < i && !strncmp(".git", url + i - 3, 4))
url_len = i - 3;
if (!dry_run) {
struct string_list refnames = STRING_LIST_INIT_NODUP;
for (ref = stale_refs; ref; ref = ref->next)
string_list_append(&refnames, ref->name);
result = delete_refs("fetch: prune", &refnames, 0);
string_list_clear(&refnames, 0);
}
if (verbosity >= 0) {
for (ref = stale_refs; ref; ref = ref->next) {
struct strbuf sb = STRBUF_INIT;
if (!shown_url) {
fprintf(stderr, _("From %.*s\n"), url_len, url);
shown_url = 1;
}
format_display(&sb, '-', _("[deleted]"), NULL,
_("(none)"), prettify_refname(ref->name),
summary_width);
fprintf(stderr, " %s\n",sb.buf);
strbuf_release(&sb);
warn_dangling_symref(stderr, dangling_msg, ref->name);
}
}
free(url);
free_refs(stale_refs);
return result;
}
static void check_not_current_branch(struct ref *ref_map)
{
struct branch *current_branch = branch_get(NULL);
if (is_bare_repository() || !current_branch)
return;
for (; ref_map; ref_map = ref_map->next)
if (ref_map->peer_ref && !strcmp(current_branch->refname,
ref_map->peer_ref->name))
die(_("Refusing to fetch into current branch %s "
"of non-bare repository"), current_branch->refname);
}
static int truncate_fetch_head(void)
{
const char *filename = git_path_fetch_head();
FILE *fp = fopen_for_writing(filename);
if (!fp)
return error_errno(_("cannot open %s"), filename);
fclose(fp);
return 0;
}
static void set_option(struct transport *transport, const char *name, const char *value)
{
int r = transport_set_option(transport, name, value);
if (r < 0)
die(_("Option \"%s\" value \"%s\" is not valid for %s"),
name, value, transport->url);
if (r > 0)
warning(_("Option \"%s\" is ignored for %s\n"),
name, transport->url);
}
static struct transport *prepare_transport(struct remote *remote, int deepen)
{
struct transport *transport;
transport = transport_get(remote, NULL);
transport_set_verbosity(transport, verbosity, progress);
transport->family = family;
if (upload_pack)
set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
if (keep)
set_option(transport, TRANS_OPT_KEEP, "yes");
if (depth)
set_option(transport, TRANS_OPT_DEPTH, depth);
if (deepen && deepen_since)
set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
if (deepen && deepen_not.nr)
set_option(transport, TRANS_OPT_DEEPEN_NOT,
(const char *)&deepen_not);
if (deepen_relative)
set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
if (update_shallow)
set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
return transport;
}
static void backfill_tags(struct transport *transport, struct ref *ref_map)
{
int cannot_reuse;
/*
* Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
* when remote helper is used (setting it to an empty string
* is not unsetting). We could extend the remote helper
* protocol for that, but for now, just force a new connection
* without deepen-since. Similar story for deepen-not.
*/
cannot_reuse = transport->cannot_reuse ||
deepen_since || deepen_not.nr;
if (cannot_reuse) {
gsecondary = prepare_transport(transport->remote, 0);
transport = gsecondary;
}
transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
transport_set_option(transport, TRANS_OPT_DEPTH, "0");
transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
fetch_refs(transport, ref_map);
if (gsecondary) {
transport_disconnect(gsecondary);
gsecondary = NULL;
}
}
static int do_fetch(struct transport *transport,
struct refspec *refs, int ref_count)
{
struct string_list existing_refs = STRING_LIST_INIT_DUP;
struct ref *ref_map;
struct ref *rm;
int autotags = (transport->remote->fetch_tags == 1);
int retcode = 0;
for_each_ref(add_existing, &existing_refs);
if (tags == TAGS_DEFAULT) {
if (transport->remote->fetch_tags == 2)
tags = TAGS_SET;
if (transport->remote->fetch_tags == -1)
tags = TAGS_UNSET;
}
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 && !dry_run) {
retcode = truncate_fetch_head();
if (retcode)
goto cleanup;
}
ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
if (!update_head_ok)
check_not_current_branch(ref_map);
for (rm = ref_map; rm; rm = rm->next) {
if (rm->peer_ref) {
struct string_list_item *peer_item =
string_list_lookup(&existing_refs,
rm->peer_ref->name);
if (peer_item) {
struct object_id *old_oid = peer_item->util;
oidcpy(&rm->peer_ref->old_oid, old_oid);
}
}
}
if (tags == TAGS_DEFAULT && autotags)
transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
if (prune) {
/*
* We only prune based on refspecs specified
* explicitly (via command line or configuration); we
* don't care whether --tags was specified.
*/
if (ref_count) {
prune_refs(refs, ref_count, ref_map, transport->url);
} else {
prune_refs(transport->remote->fetch,
transport->remote->fetch_refspec_nr,
ref_map,
transport->url);
}
}
if (fetch_refs(transport, ref_map)) {
free_refs(ref_map);
retcode = 1;
goto cleanup;
}
free_refs(ref_map);
/* if neither --no-tags nor --tags was specified, do automated tag
* following ... */
if (tags == TAGS_DEFAULT && autotags) {
struct ref **tail = &ref_map;
ref_map = NULL;
find_non_local_tags(transport, &ref_map, &tail);
if (ref_map)
backfill_tags(transport, ref_map);
free_refs(ref_map);
}
cleanup:
string_list_clear(&existing_refs, 1);
return retcode;
}
static int get_one_remote_for_fetch(struct remote *remote, void *priv)
{
struct string_list *list = priv;
if (!remote->skip_default_update)
string_list_append(list, remote->name);
return 0;
}
struct remote_group_data {
const char *name;
struct string_list *list;
};
static int get_remote_group(const char *key, const char *value, void *priv)
{
struct remote_group_data *g = priv;
if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
/* split list by white space */
while (*value) {
size_t wordlen = strcspn(value, " \t\n");
if (wordlen >= 1)
string_list_append_nodup(g->list,
xstrndup(value, wordlen));
value += wordlen + (value[wordlen] != '\0');
}
}
return 0;
}
static int add_remote_or_group(const char *name, struct string_list *list)
{
int prev_nr = list->nr;
struct remote_group_data g;
g.name = name; g.list = list;
git_config(get_remote_group, &g);
if (list->nr == prev_nr) {
struct remote *remote = remote_get(name);
if (!remote_is_configured(remote, 0))
return 0;
string_list_append(list, remote->name);
}
return 1;
}
static void add_options_to_argv(struct argv_array *argv)
{
if (dry_run)
argv_array_push(argv, "--dry-run");
if (prune != -1)
argv_array_push(argv, prune ? "--prune" : "--no-prune");
if (update_head_ok)
argv_array_push(argv, "--update-head-ok");
if (force)
argv_array_push(argv, "--force");
if (keep)
argv_array_push(argv, "--keep");
if (recurse_submodules == RECURSE_SUBMODULES_ON)
argv_array_push(argv, "--recurse-submodules");
else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
argv_array_push(argv, "--recurse-submodules=on-demand");
if (tags == TAGS_SET)
argv_array_push(argv, "--tags");
else if (tags == TAGS_UNSET)
argv_array_push(argv, "--no-tags");
if (verbosity >= 2)
argv_array_push(argv, "-v");
if (verbosity >= 1)
argv_array_push(argv, "-v");
else if (verbosity < 0)
argv_array_push(argv, "-q");
}
static int fetch_multiple(struct string_list *list)
{
int i, result = 0;
struct argv_array argv = ARGV_ARRAY_INIT;
if (!append && !dry_run) {
int errcode = truncate_fetch_head();
if (errcode)
return errcode;
}
argv_array_pushl(&argv, "fetch", "--append", NULL);
add_options_to_argv(&argv);
for (i = 0; i < list->nr; i++) {
const char *name = list->items[i].string;
argv_array_push(&argv, name);
if (verbosity >= 0)
printf(_("Fetching %s\n"), name);
if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
error(_("Could not fetch %s"), name);
result = 1;
}
argv_array_pop(&argv);
}
argv_array_clear(&argv);
return result;
}
static int fetch_one(struct remote *remote, int argc, const char **argv)
{
static const char **refs = NULL;
struct refspec *refspec;
int ref_nr = 0;
int exit_code;
if (!remote)
die(_("No remote repository specified. Please, specify either a URL or a\n"
"remote name from which new revisions should be fetched."));
gtransport = prepare_transport(remote, 1);
if (prune < 0) {
/* no command line request */
if (0 <= gtransport->remote->prune)
prune = gtransport->remote->prune;
else if (0 <= fetch_prune_config)
prune = fetch_prune_config;
else
prune = PRUNE_BY_DEFAULT;
}
if (argc > 0) {
int j = 0;
int i;
refs = xcalloc(st_add(argc, 1), sizeof(const char *));
for (i = 0; i < argc; i++) {
if (!strcmp(argv[i], "tag")) {
i++;
if (i >= argc)
die(_("You need to specify a tag name."));
refs[j++] = xstrfmt("refs/tags/%s:refs/tags/%s",
argv[i], argv[i]);
} else
refs[j++] = argv[i];
}
refs[j] = NULL;
ref_nr = j;
}
sigchain_push_common(unlock_pack_on_signal);
atexit(unlock_pack);
refspec = parse_fetch_refspec(ref_nr, refs);
exit_code = do_fetch(gtransport, refspec, ref_nr);
free_refspec(ref_nr, refspec);
transport_disconnect(gtransport);
gtransport = NULL;
return exit_code;
}
int cmd_fetch(int argc, const char **argv, const char *prefix)
{
int i;
struct string_list list = STRING_LIST_INIT_DUP;
struct remote *remote;
int result = 0;
struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
packet_trace_identity("fetch");
/* 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]);
config_from_gitmodules(gitmodules_fetch_config, NULL);
git_config(git_fetch_config, NULL);
argc = parse_options(argc, argv, prefix,
builtin_fetch_options, builtin_fetch_usage, 0);
if (deepen_relative) {
if (deepen_relative < 0)
die(_("Negative depth in --deepen is not supported"));
if (depth)
die(_("--deepen and --depth are mutually exclusive"));
depth = xstrfmt("%d", deepen_relative);
}
if (unshallow) {
if (depth)
die(_("--depth and --unshallow cannot be used together"));
else if (!is_repository_shallow())
die(_("--unshallow on a complete repository does not make sense"));
else
depth = xstrfmt("%d", INFINITE_DEPTH);
}
/* no need to be strict, transport_set_option() will validate it again */
if (depth && atoi(depth) < 1)
die(_("depth %s is not a positive number"), depth);
if (depth || deepen_since || deepen_not.nr)
deepen = 1;
if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
gitmodules_config();
git_config(submodule_config, NULL);
}
if (all) {
if (argc == 1)
die(_("fetch --all does not take a repository argument"));
else if (argc > 1)
die(_("fetch --all does not make sense with refspecs"));
(void) for_each_remote(get_one_remote_for_fetch, &list);
result = fetch_multiple(&list);
} else if (argc == 0) {
/* No arguments -- use default remote */
remote = remote_get(NULL);
result = fetch_one(remote, argc, argv);
} else if (multiple) {
/* All arguments are assumed to be remotes or groups */
for (i = 0; i < argc; i++)
if (!add_remote_or_group(argv[i], &list))
die(_("No such remote or remote group: %s"), argv[i]);
result = fetch_multiple(&list);
} else {
/* Single remote or group */
(void) add_remote_or_group(argv[0], &list);
if (list.nr > 1) {
/* More than one remote */
if (argc > 1)
die(_("Fetching a group and specifying refspecs does not make sense"));
result = fetch_multiple(&list);
} else {
/* Zero or one remotes */
remote = remote_get(argv[0]);
result = fetch_one(remote, argc-1, argv+1);
}
}
if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
struct argv_array options = ARGV_ARRAY_INIT;
add_options_to_argv(&options);
result = fetch_populated_submodules(&options,
submodule_prefix,
recurse_submodules,
recurse_submodules_default,
verbosity < 0,
max_children);
argv_array_clear(&options);
}
string_list_clear(&list, 0);
close_all_packs();
argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
if (verbosity < 0)
argv_array_push(&argv_gc_auto, "--quiet");
run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
argv_array_clear(&argv_gc_auto);
return result;
}
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