git/transport.c
Nguyễn Thái Ngọc Duy cccf74e2da fetch, upload-pack: --deepen=N extends shallow boundary by N commits
In git-fetch, --depth argument is always relative with the latest
remote refs. This makes it a bit difficult to cover this use case,
where the user wants to make the shallow history, say 3 levels
deeper. It would work if remote refs have not moved yet, but nobody
can guarantee that, especially when that use case is performed a
couple months after the last clone or "git fetch --depth". Also,
modifying shallow boundary using --depth does not work well with
clones created by --since or --not.

This patch fixes that. A new argument --deepen=<N> will add <N> more (*)
parent commits to the current history regardless of where remote refs
are.

Have/Want negotiation is still respected. So if remote refs move, the
server will send two chunks: one between "have" and "want" and another
to extend shallow history. In theory, the client could send no "want"s
in order to get the second chunk only. But the protocol does not allow
that. Either you send no want lines, which means ls-remote; or you
have to send at least one want line that carries deep-relative to the
server..

The main work was done by Dongcan Jiang. I fixed it up here and there.
And of course all the bugs belong to me.

(*) We could even support --deepen=<N> where <N> is negative. In that
case we can cut some history from the shallow clone. This operation
(and --depth=<shorter depth>) does not require interaction with remote
side (and more complicated to implement as a result).

Helped-by: Duy Nguyen <pclouds@gmail.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Dongcan Jiang <dongcan.jiang@gmail.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-13 14:38:16 -07:00

1126 lines
29 KiB
C

#include "cache.h"
#include "transport.h"
#include "run-command.h"
#include "pkt-line.h"
#include "fetch-pack.h"
#include "remote.h"
#include "connect.h"
#include "send-pack.h"
#include "walker.h"
#include "bundle.h"
#include "dir.h"
#include "refs.h"
#include "branch.h"
#include "url.h"
#include "submodule.h"
#include "string-list.h"
#include "sha1-array.h"
#include "sigchain.h"
static void set_upstreams(struct transport *transport, struct ref *refs,
int pretend)
{
struct ref *ref;
for (ref = refs; ref; ref = ref->next) {
const char *localname;
const char *tmp;
const char *remotename;
unsigned char sha[20];
int flag = 0;
/*
* Check suitability for tracking. Must be successful /
* already up-to-date ref create/modify (not delete).
*/
if (ref->status != REF_STATUS_OK &&
ref->status != REF_STATUS_UPTODATE)
continue;
if (!ref->peer_ref)
continue;
if (is_null_oid(&ref->new_oid))
continue;
/* Follow symbolic refs (mainly for HEAD). */
localname = ref->peer_ref->name;
remotename = ref->name;
tmp = resolve_ref_unsafe(localname, RESOLVE_REF_READING,
sha, &flag);
if (tmp && flag & REF_ISSYMREF &&
starts_with(tmp, "refs/heads/"))
localname = tmp;
/* Both source and destination must be local branches. */
if (!localname || !starts_with(localname, "refs/heads/"))
continue;
if (!remotename || !starts_with(remotename, "refs/heads/"))
continue;
if (!pretend)
install_branch_config(BRANCH_CONFIG_VERBOSE,
localname + 11, transport->remote->name,
remotename);
else
printf("Would set upstream of '%s' to '%s' of '%s'\n",
localname + 11, remotename + 11,
transport->remote->name);
}
}
struct bundle_transport_data {
int fd;
struct bundle_header header;
};
static struct ref *get_refs_from_bundle(struct transport *transport, int for_push)
{
struct bundle_transport_data *data = transport->data;
struct ref *result = NULL;
int i;
if (for_push)
return NULL;
if (data->fd > 0)
close(data->fd);
data->fd = read_bundle_header(transport->url, &data->header);
if (data->fd < 0)
die ("Could not read bundle '%s'.", transport->url);
for (i = 0; i < data->header.references.nr; i++) {
struct ref_list_entry *e = data->header.references.list + i;
struct ref *ref = alloc_ref(e->name);
hashcpy(ref->old_oid.hash, e->sha1);
ref->next = result;
result = ref;
}
return result;
}
static int fetch_refs_from_bundle(struct transport *transport,
int nr_heads, struct ref **to_fetch)
{
struct bundle_transport_data *data = transport->data;
return unbundle(&data->header, data->fd,
transport->progress ? BUNDLE_VERBOSE : 0);
}
static int close_bundle(struct transport *transport)
{
struct bundle_transport_data *data = transport->data;
if (data->fd > 0)
close(data->fd);
free(data);
return 0;
}
struct git_transport_data {
struct git_transport_options options;
struct child_process *conn;
int fd[2];
unsigned got_remote_heads : 1;
struct sha1_array extra_have;
struct sha1_array shallow;
};
static int set_git_option(struct git_transport_options *opts,
const char *name, const char *value)
{
if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
opts->uploadpack = value;
return 0;
} else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
opts->receivepack = value;
return 0;
} else if (!strcmp(name, TRANS_OPT_THIN)) {
opts->thin = !!value;
return 0;
} else if (!strcmp(name, TRANS_OPT_FOLLOWTAGS)) {
opts->followtags = !!value;
return 0;
} else if (!strcmp(name, TRANS_OPT_KEEP)) {
opts->keep = !!value;
return 0;
} else if (!strcmp(name, TRANS_OPT_UPDATE_SHALLOW)) {
opts->update_shallow = !!value;
return 0;
} else if (!strcmp(name, TRANS_OPT_DEPTH)) {
if (!value)
opts->depth = 0;
else {
char *end;
opts->depth = strtol(value, &end, 0);
if (*end)
die("transport: invalid depth option '%s'", value);
}
return 0;
} else if (!strcmp(name, TRANS_OPT_DEEPEN_SINCE)) {
opts->deepen_since = value;
return 0;
} else if (!strcmp(name, TRANS_OPT_DEEPEN_NOT)) {
opts->deepen_not = (const struct string_list *)value;
return 0;
} else if (!strcmp(name, TRANS_OPT_DEEPEN_RELATIVE)) {
opts->deepen_relative = !!value;
return 0;
}
return 1;
}
static int connect_setup(struct transport *transport, int for_push)
{
struct git_transport_data *data = transport->data;
int flags = transport->verbose > 0 ? CONNECT_VERBOSE : 0;
if (data->conn)
return 0;
data->conn = git_connect(data->fd, transport->url,
for_push ? data->options.receivepack :
data->options.uploadpack,
flags);
return 0;
}
static struct ref *get_refs_via_connect(struct transport *transport, int for_push)
{
struct git_transport_data *data = transport->data;
struct ref *refs;
connect_setup(transport, for_push);
get_remote_heads(data->fd[0], NULL, 0, &refs,
for_push ? REF_NORMAL : 0,
&data->extra_have,
&data->shallow);
data->got_remote_heads = 1;
return refs;
}
static int fetch_refs_via_pack(struct transport *transport,
int nr_heads, struct ref **to_fetch)
{
struct git_transport_data *data = transport->data;
struct ref *refs;
char *dest = xstrdup(transport->url);
struct fetch_pack_args args;
struct ref *refs_tmp = NULL;
memset(&args, 0, sizeof(args));
args.uploadpack = data->options.uploadpack;
args.keep_pack = data->options.keep;
args.lock_pack = 1;
args.use_thin_pack = data->options.thin;
args.include_tag = data->options.followtags;
args.verbose = (transport->verbose > 1);
args.quiet = (transport->verbose < 0);
args.no_progress = !transport->progress;
args.depth = data->options.depth;
args.deepen_since = data->options.deepen_since;
args.deepen_not = data->options.deepen_not;
args.deepen_relative = data->options.deepen_relative;
args.check_self_contained_and_connected =
data->options.check_self_contained_and_connected;
args.cloning = transport->cloning;
args.update_shallow = data->options.update_shallow;
if (!data->got_remote_heads) {
connect_setup(transport, 0);
get_remote_heads(data->fd[0], NULL, 0, &refs_tmp, 0,
NULL, &data->shallow);
data->got_remote_heads = 1;
}
refs = fetch_pack(&args, data->fd, data->conn,
refs_tmp ? refs_tmp : transport->remote_refs,
dest, to_fetch, nr_heads, &data->shallow,
&transport->pack_lockfile);
close(data->fd[0]);
close(data->fd[1]);
if (finish_connect(data->conn)) {
free_refs(refs);
refs = NULL;
}
data->conn = NULL;
data->got_remote_heads = 0;
data->options.self_contained_and_connected =
args.self_contained_and_connected;
free_refs(refs_tmp);
free_refs(refs);
free(dest);
return (refs ? 0 : -1);
}
static int push_had_errors(struct ref *ref)
{
for (; ref; ref = ref->next) {
switch (ref->status) {
case REF_STATUS_NONE:
case REF_STATUS_UPTODATE:
case REF_STATUS_OK:
break;
default:
return 1;
}
}
return 0;
}
int transport_refs_pushed(struct ref *ref)
{
for (; ref; ref = ref->next) {
switch(ref->status) {
case REF_STATUS_NONE:
case REF_STATUS_UPTODATE:
break;
default:
return 1;
}
}
return 0;
}
void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose)
{
struct refspec rs;
if (ref->status != REF_STATUS_OK && ref->status != REF_STATUS_UPTODATE)
return;
rs.src = ref->name;
rs.dst = NULL;
if (!remote_find_tracking(remote, &rs)) {
if (verbose)
fprintf(stderr, "updating local tracking ref '%s'\n", rs.dst);
if (ref->deletion) {
delete_ref(rs.dst, NULL, 0);
} else
update_ref("update by push", rs.dst,
ref->new_oid.hash, NULL, 0, 0);
free(rs.dst);
}
}
static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg, int porcelain)
{
if (porcelain) {
if (from)
fprintf(stdout, "%c\t%s:%s\t", flag, from->name, to->name);
else
fprintf(stdout, "%c\t:%s\t", flag, to->name);
if (msg)
fprintf(stdout, "%s (%s)\n", summary, msg);
else
fprintf(stdout, "%s\n", summary);
} else {
fprintf(stderr, " %c %-*s ", flag, TRANSPORT_SUMMARY_WIDTH, summary);
if (from)
fprintf(stderr, "%s -> %s", prettify_refname(from->name), prettify_refname(to->name));
else
fputs(prettify_refname(to->name), stderr);
if (msg) {
fputs(" (", stderr);
fputs(msg, stderr);
fputc(')', stderr);
}
fputc('\n', stderr);
}
}
static const char *status_abbrev(unsigned char sha1[20])
{
return find_unique_abbrev(sha1, DEFAULT_ABBREV);
}
static void print_ok_ref_status(struct ref *ref, int porcelain)
{
if (ref->deletion)
print_ref_status('-', "[deleted]", ref, NULL, NULL, porcelain);
else if (is_null_oid(&ref->old_oid))
print_ref_status('*',
(starts_with(ref->name, "refs/tags/") ? "[new tag]" :
"[new branch]"),
ref, ref->peer_ref, NULL, porcelain);
else {
struct strbuf quickref = STRBUF_INIT;
char type;
const char *msg;
strbuf_addstr(&quickref, status_abbrev(ref->old_oid.hash));
if (ref->forced_update) {
strbuf_addstr(&quickref, "...");
type = '+';
msg = "forced update";
} else {
strbuf_addstr(&quickref, "..");
type = ' ';
msg = NULL;
}
strbuf_addstr(&quickref, status_abbrev(ref->new_oid.hash));
print_ref_status(type, quickref.buf, ref, ref->peer_ref, msg, porcelain);
strbuf_release(&quickref);
}
}
static int print_one_push_status(struct ref *ref, const char *dest, int count, int porcelain)
{
if (!count)
fprintf(porcelain ? stdout : stderr, "To %s\n", dest);
switch(ref->status) {
case REF_STATUS_NONE:
print_ref_status('X', "[no match]", ref, NULL, NULL, porcelain);
break;
case REF_STATUS_REJECT_NODELETE:
print_ref_status('!', "[rejected]", ref, NULL,
"remote does not support deleting refs", porcelain);
break;
case REF_STATUS_UPTODATE:
print_ref_status('=', "[up to date]", ref,
ref->peer_ref, NULL, porcelain);
break;
case REF_STATUS_REJECT_NONFASTFORWARD:
print_ref_status('!', "[rejected]", ref, ref->peer_ref,
"non-fast-forward", porcelain);
break;
case REF_STATUS_REJECT_ALREADY_EXISTS:
print_ref_status('!', "[rejected]", ref, ref->peer_ref,
"already exists", porcelain);
break;
case REF_STATUS_REJECT_FETCH_FIRST:
print_ref_status('!', "[rejected]", ref, ref->peer_ref,
"fetch first", porcelain);
break;
case REF_STATUS_REJECT_NEEDS_FORCE:
print_ref_status('!', "[rejected]", ref, ref->peer_ref,
"needs force", porcelain);
break;
case REF_STATUS_REJECT_STALE:
print_ref_status('!', "[rejected]", ref, ref->peer_ref,
"stale info", porcelain);
break;
case REF_STATUS_REJECT_SHALLOW:
print_ref_status('!', "[rejected]", ref, ref->peer_ref,
"new shallow roots not allowed", porcelain);
break;
case REF_STATUS_REMOTE_REJECT:
print_ref_status('!', "[remote rejected]", ref,
ref->deletion ? NULL : ref->peer_ref,
ref->remote_status, porcelain);
break;
case REF_STATUS_EXPECTING_REPORT:
print_ref_status('!', "[remote failure]", ref,
ref->deletion ? NULL : ref->peer_ref,
"remote failed to report status", porcelain);
break;
case REF_STATUS_ATOMIC_PUSH_FAILED:
print_ref_status('!', "[rejected]", ref, ref->peer_ref,
"atomic push failed", porcelain);
break;
case REF_STATUS_OK:
print_ok_ref_status(ref, porcelain);
break;
}
return 1;
}
void transport_print_push_status(const char *dest, struct ref *refs,
int verbose, int porcelain, unsigned int *reject_reasons)
{
struct ref *ref;
int n = 0;
unsigned char head_sha1[20];
char *head;
head = resolve_refdup("HEAD", RESOLVE_REF_READING, head_sha1, NULL);
if (verbose) {
for (ref = refs; ref; ref = ref->next)
if (ref->status == REF_STATUS_UPTODATE)
n += print_one_push_status(ref, dest, n, porcelain);
}
for (ref = refs; ref; ref = ref->next)
if (ref->status == REF_STATUS_OK)
n += print_one_push_status(ref, dest, n, porcelain);
*reject_reasons = 0;
for (ref = refs; ref; ref = ref->next) {
if (ref->status != REF_STATUS_NONE &&
ref->status != REF_STATUS_UPTODATE &&
ref->status != REF_STATUS_OK)
n += print_one_push_status(ref, dest, n, porcelain);
if (ref->status == REF_STATUS_REJECT_NONFASTFORWARD) {
if (head != NULL && !strcmp(head, ref->name))
*reject_reasons |= REJECT_NON_FF_HEAD;
else
*reject_reasons |= REJECT_NON_FF_OTHER;
} else if (ref->status == REF_STATUS_REJECT_ALREADY_EXISTS) {
*reject_reasons |= REJECT_ALREADY_EXISTS;
} else if (ref->status == REF_STATUS_REJECT_FETCH_FIRST) {
*reject_reasons |= REJECT_FETCH_FIRST;
} else if (ref->status == REF_STATUS_REJECT_NEEDS_FORCE) {
*reject_reasons |= REJECT_NEEDS_FORCE;
}
}
free(head);
}
void transport_verify_remote_names(int nr_heads, const char **heads)
{
int i;
for (i = 0; i < nr_heads; i++) {
const char *local = heads[i];
const char *remote = strrchr(heads[i], ':');
if (*local == '+')
local++;
/* A matching refspec is okay. */
if (remote == local && remote[1] == '\0')
continue;
remote = remote ? (remote + 1) : local;
if (check_refname_format(remote,
REFNAME_ALLOW_ONELEVEL|REFNAME_REFSPEC_PATTERN))
die("remote part of refspec is not a valid name in %s",
heads[i]);
}
}
static int git_transport_push(struct transport *transport, struct ref *remote_refs, int flags)
{
struct git_transport_data *data = transport->data;
struct send_pack_args args;
int ret;
if (!data->got_remote_heads) {
struct ref *tmp_refs;
connect_setup(transport, 1);
get_remote_heads(data->fd[0], NULL, 0, &tmp_refs, REF_NORMAL,
NULL, &data->shallow);
data->got_remote_heads = 1;
}
memset(&args, 0, sizeof(args));
args.send_mirror = !!(flags & TRANSPORT_PUSH_MIRROR);
args.force_update = !!(flags & TRANSPORT_PUSH_FORCE);
args.use_thin_pack = data->options.thin;
args.verbose = (transport->verbose > 0);
args.quiet = (transport->verbose < 0);
args.progress = transport->progress;
args.dry_run = !!(flags & TRANSPORT_PUSH_DRY_RUN);
args.porcelain = !!(flags & TRANSPORT_PUSH_PORCELAIN);
args.atomic = !!(flags & TRANSPORT_PUSH_ATOMIC);
args.url = transport->url;
if (flags & TRANSPORT_PUSH_CERT_ALWAYS)
args.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED)
args.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
else
args.push_cert = SEND_PACK_PUSH_CERT_NEVER;
ret = send_pack(&args, data->fd, data->conn, remote_refs,
&data->extra_have);
close(data->fd[1]);
close(data->fd[0]);
ret |= finish_connect(data->conn);
data->conn = NULL;
data->got_remote_heads = 0;
return ret;
}
static int connect_git(struct transport *transport, const char *name,
const char *executable, int fd[2])
{
struct git_transport_data *data = transport->data;
data->conn = git_connect(data->fd, transport->url,
executable, 0);
fd[0] = data->fd[0];
fd[1] = data->fd[1];
return 0;
}
static int disconnect_git(struct transport *transport)
{
struct git_transport_data *data = transport->data;
if (data->conn) {
if (data->got_remote_heads)
packet_flush(data->fd[1]);
close(data->fd[0]);
close(data->fd[1]);
finish_connect(data->conn);
}
free(data);
return 0;
}
void transport_take_over(struct transport *transport,
struct child_process *child)
{
struct git_transport_data *data;
if (!transport->smart_options)
die("Bug detected: Taking over transport requires non-NULL "
"smart_options field.");
data = xcalloc(1, sizeof(*data));
data->options = *transport->smart_options;
data->conn = child;
data->fd[0] = data->conn->out;
data->fd[1] = data->conn->in;
data->got_remote_heads = 0;
transport->data = data;
transport->set_option = NULL;
transport->get_refs_list = get_refs_via_connect;
transport->fetch = fetch_refs_via_pack;
transport->push = NULL;
transport->push_refs = git_transport_push;
transport->disconnect = disconnect_git;
transport->smart_options = &(data->options);
transport->cannot_reuse = 1;
}
static int is_file(const char *url)
{
struct stat buf;
if (stat(url, &buf))
return 0;
return S_ISREG(buf.st_mode);
}
static int external_specification_len(const char *url)
{
return strchr(url, ':') - url;
}
static const struct string_list *protocol_whitelist(void)
{
static int enabled = -1;
static struct string_list allowed = STRING_LIST_INIT_DUP;
if (enabled < 0) {
const char *v = getenv("GIT_ALLOW_PROTOCOL");
if (v) {
string_list_split(&allowed, v, ':', -1);
string_list_sort(&allowed);
enabled = 1;
} else {
enabled = 0;
}
}
return enabled ? &allowed : NULL;
}
int is_transport_allowed(const char *type)
{
const struct string_list *allowed = protocol_whitelist();
return !allowed || string_list_has_string(allowed, type);
}
void transport_check_allowed(const char *type)
{
if (!is_transport_allowed(type))
die("transport '%s' not allowed", type);
}
int transport_restrict_protocols(void)
{
return !!protocol_whitelist();
}
struct transport *transport_get(struct remote *remote, const char *url)
{
const char *helper;
struct transport *ret = xcalloc(1, sizeof(*ret));
ret->progress = isatty(2);
if (!remote)
die("No remote provided to transport_get()");
ret->got_remote_refs = 0;
ret->remote = remote;
helper = remote->foreign_vcs;
if (!url && remote->url)
url = remote->url[0];
ret->url = url;
/* maybe it is a foreign URL? */
if (url) {
const char *p = url;
while (is_urlschemechar(p == url, *p))
p++;
if (starts_with(p, "::"))
helper = xstrndup(url, p - url);
}
if (helper) {
transport_helper_init(ret, helper);
} else if (starts_with(url, "rsync:")) {
die("git-over-rsync is no longer supported");
} else if (url_is_local_not_ssh(url) && is_file(url) && is_bundle(url, 1)) {
struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
transport_check_allowed("file");
ret->data = data;
ret->get_refs_list = get_refs_from_bundle;
ret->fetch = fetch_refs_from_bundle;
ret->disconnect = close_bundle;
ret->smart_options = NULL;
} else if (!is_url(url)
|| starts_with(url, "file://")
|| starts_with(url, "git://")
|| starts_with(url, "ssh://")
|| starts_with(url, "git+ssh://")
|| starts_with(url, "ssh+git://")) {
/*
* These are builtin smart transports; "allowed" transports
* will be checked individually in git_connect.
*/
struct git_transport_data *data = xcalloc(1, sizeof(*data));
ret->data = data;
ret->set_option = NULL;
ret->get_refs_list = get_refs_via_connect;
ret->fetch = fetch_refs_via_pack;
ret->push_refs = git_transport_push;
ret->connect = connect_git;
ret->disconnect = disconnect_git;
ret->smart_options = &(data->options);
data->conn = NULL;
data->got_remote_heads = 0;
} else {
/* Unknown protocol in URL. Pass to external handler. */
int len = external_specification_len(url);
char *handler = xmemdupz(url, len);
transport_helper_init(ret, handler);
}
if (ret->smart_options) {
ret->smart_options->thin = 1;
ret->smart_options->uploadpack = "git-upload-pack";
if (remote->uploadpack)
ret->smart_options->uploadpack = remote->uploadpack;
ret->smart_options->receivepack = "git-receive-pack";
if (remote->receivepack)
ret->smart_options->receivepack = remote->receivepack;
}
return ret;
}
int transport_set_option(struct transport *transport,
const char *name, const char *value)
{
int git_reports = 1, protocol_reports = 1;
if (transport->smart_options)
git_reports = set_git_option(transport->smart_options,
name, value);
if (transport->set_option)
protocol_reports = transport->set_option(transport, name,
value);
/* If either report is 0, report 0 (success). */
if (!git_reports || !protocol_reports)
return 0;
/* If either reports -1 (invalid value), report -1. */
if ((git_reports == -1) || (protocol_reports == -1))
return -1;
/* Otherwise if both report unknown, report unknown. */
return 1;
}
void transport_set_verbosity(struct transport *transport, int verbosity,
int force_progress)
{
if (verbosity >= 1)
transport->verbose = verbosity <= 3 ? verbosity : 3;
if (verbosity < 0)
transport->verbose = -1;
/**
* Rules used to determine whether to report progress (processing aborts
* when a rule is satisfied):
*
* . Report progress, if force_progress is 1 (ie. --progress).
* . Don't report progress, if force_progress is 0 (ie. --no-progress).
* . Don't report progress, if verbosity < 0 (ie. -q/--quiet ).
* . Report progress if isatty(2) is 1.
**/
if (force_progress >= 0)
transport->progress = !!force_progress;
else
transport->progress = verbosity >= 0 && isatty(2);
}
static void die_with_unpushed_submodules(struct string_list *needs_pushing)
{
int i;
fprintf(stderr, "The following submodule paths contain changes that can\n"
"not be found on any remote:\n");
for (i = 0; i < needs_pushing->nr; i++)
printf(" %s\n", needs_pushing->items[i].string);
fprintf(stderr, "\nPlease try\n\n"
" git push --recurse-submodules=on-demand\n\n"
"or cd to the path and use\n\n"
" git push\n\n"
"to push them to a remote.\n\n");
string_list_clear(needs_pushing, 0);
die("Aborting.");
}
static int run_pre_push_hook(struct transport *transport,
struct ref *remote_refs)
{
int ret = 0, x;
struct ref *r;
struct child_process proc = CHILD_PROCESS_INIT;
struct strbuf buf;
const char *argv[4];
if (!(argv[0] = find_hook("pre-push")))
return 0;
argv[1] = transport->remote->name;
argv[2] = transport->url;
argv[3] = NULL;
proc.argv = argv;
proc.in = -1;
if (start_command(&proc)) {
finish_command(&proc);
return -1;
}
sigchain_push(SIGPIPE, SIG_IGN);
strbuf_init(&buf, 256);
for (r = remote_refs; r; r = r->next) {
if (!r->peer_ref) continue;
if (r->status == REF_STATUS_REJECT_NONFASTFORWARD) continue;
if (r->status == REF_STATUS_REJECT_STALE) continue;
if (r->status == REF_STATUS_UPTODATE) continue;
strbuf_reset(&buf);
strbuf_addf( &buf, "%s %s %s %s\n",
r->peer_ref->name, oid_to_hex(&r->new_oid),
r->name, oid_to_hex(&r->old_oid));
if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
/* We do not mind if a hook does not read all refs. */
if (errno != EPIPE)
ret = -1;
break;
}
}
strbuf_release(&buf);
x = close(proc.in);
if (!ret)
ret = x;
sigchain_pop(SIGPIPE);
x = finish_command(&proc);
if (!ret)
ret = x;
return ret;
}
int transport_push(struct transport *transport,
int refspec_nr, const char **refspec, int flags,
unsigned int *reject_reasons)
{
*reject_reasons = 0;
transport_verify_remote_names(refspec_nr, refspec);
if (transport->push) {
/* Maybe FIXME. But no important transport uses this case. */
if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
die("This transport does not support using --set-upstream");
return transport->push(transport, refspec_nr, refspec, flags);
} else if (transport->push_refs) {
struct ref *remote_refs;
struct ref *local_refs = get_local_heads();
int match_flags = MATCH_REFS_NONE;
int verbose = (transport->verbose > 0);
int quiet = (transport->verbose < 0);
int porcelain = flags & TRANSPORT_PUSH_PORCELAIN;
int pretend = flags & TRANSPORT_PUSH_DRY_RUN;
int push_ret, ret, err;
if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
return -1;
remote_refs = transport->get_refs_list(transport, 1);
if (flags & TRANSPORT_PUSH_ALL)
match_flags |= MATCH_REFS_ALL;
if (flags & TRANSPORT_PUSH_MIRROR)
match_flags |= MATCH_REFS_MIRROR;
if (flags & TRANSPORT_PUSH_PRUNE)
match_flags |= MATCH_REFS_PRUNE;
if (flags & TRANSPORT_PUSH_FOLLOW_TAGS)
match_flags |= MATCH_REFS_FOLLOW_TAGS;
if (match_push_refs(local_refs, &remote_refs,
refspec_nr, refspec, match_flags)) {
return -1;
}
if (transport->smart_options &&
transport->smart_options->cas &&
!is_empty_cas(transport->smart_options->cas))
apply_push_cas(transport->smart_options->cas,
transport->remote, remote_refs);
set_ref_status_for_push(remote_refs,
flags & TRANSPORT_PUSH_MIRROR,
flags & TRANSPORT_PUSH_FORCE);
if (!(flags & TRANSPORT_PUSH_NO_HOOK))
if (run_pre_push_hook(transport, remote_refs))
return -1;
if ((flags & TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND) && !is_bare_repository()) {
struct ref *ref = remote_refs;
for (; ref; ref = ref->next)
if (!is_null_oid(&ref->new_oid) &&
!push_unpushed_submodules(ref->new_oid.hash,
transport->remote->name))
die ("Failed to push all needed submodules!");
}
if ((flags & (TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND |
TRANSPORT_RECURSE_SUBMODULES_CHECK)) && !is_bare_repository()) {
struct ref *ref = remote_refs;
struct string_list needs_pushing = STRING_LIST_INIT_DUP;
for (; ref; ref = ref->next)
if (!is_null_oid(&ref->new_oid) &&
find_unpushed_submodules(ref->new_oid.hash,
transport->remote->name, &needs_pushing))
die_with_unpushed_submodules(&needs_pushing);
}
push_ret = transport->push_refs(transport, remote_refs, flags);
err = push_had_errors(remote_refs);
ret = push_ret | err;
if (!quiet || err)
transport_print_push_status(transport->url, remote_refs,
verbose | porcelain, porcelain,
reject_reasons);
if (flags & TRANSPORT_PUSH_SET_UPSTREAM)
set_upstreams(transport, remote_refs, pretend);
if (!(flags & TRANSPORT_PUSH_DRY_RUN)) {
struct ref *ref;
for (ref = remote_refs; ref; ref = ref->next)
transport_update_tracking_ref(transport->remote, ref, verbose);
}
if (porcelain && !push_ret)
puts("Done");
else if (!quiet && !ret && !transport_refs_pushed(remote_refs))
fprintf(stderr, "Everything up-to-date\n");
return ret;
}
return 1;
}
const struct ref *transport_get_remote_refs(struct transport *transport)
{
if (!transport->got_remote_refs) {
transport->remote_refs = transport->get_refs_list(transport, 0);
transport->got_remote_refs = 1;
}
return transport->remote_refs;
}
int transport_fetch_refs(struct transport *transport, struct ref *refs)
{
int rc;
int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
struct ref **heads = NULL;
struct ref *rm;
for (rm = refs; rm; rm = rm->next) {
nr_refs++;
if (rm->peer_ref &&
!is_null_oid(&rm->old_oid) &&
!oidcmp(&rm->peer_ref->old_oid, &rm->old_oid))
continue;
ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
heads[nr_heads++] = rm;
}
if (!nr_heads) {
/*
* When deepening of a shallow repository is requested,
* then local and remote refs are likely to still be equal.
* Just feed them all to the fetch method in that case.
* This condition shouldn't be met in a non-deepening fetch
* (see builtin/fetch.c:quickfetch()).
*/
heads = xmalloc(nr_refs * sizeof(*heads));
for (rm = refs; rm; rm = rm->next)
heads[nr_heads++] = rm;
}
rc = transport->fetch(transport, nr_heads, heads);
free(heads);
return rc;
}
void transport_unlock_pack(struct transport *transport)
{
if (transport->pack_lockfile) {
unlink_or_warn(transport->pack_lockfile);
free(transport->pack_lockfile);
transport->pack_lockfile = NULL;
}
}
int transport_connect(struct transport *transport, const char *name,
const char *exec, int fd[2])
{
if (transport->connect)
return transport->connect(transport, name, exec, fd);
else
die("Operation not supported by protocol");
}
int transport_disconnect(struct transport *transport)
{
int ret = 0;
if (transport->disconnect)
ret = transport->disconnect(transport);
free(transport);
return ret;
}
/*
* Strip username (and password) from a URL and return
* it in a newly allocated string.
*/
char *transport_anonymize_url(const char *url)
{
char *anon_url, *scheme_prefix, *anon_part;
size_t anon_len, prefix_len = 0;
anon_part = strchr(url, '@');
if (url_is_local_not_ssh(url) || !anon_part)
goto literal_copy;
anon_len = strlen(++anon_part);
scheme_prefix = strstr(url, "://");
if (!scheme_prefix) {
if (!strchr(anon_part, ':'))
/* cannot be "me@there:/path/name" */
goto literal_copy;
} else {
const char *cp;
/* make sure scheme is reasonable */
for (cp = url; cp < scheme_prefix; cp++) {
switch (*cp) {
/* RFC 1738 2.1 */
case '+': case '.': case '-':
break; /* ok */
default:
if (isalnum(*cp))
break;
/* it isn't */
goto literal_copy;
}
}
/* @ past the first slash does not count */
cp = strchr(scheme_prefix + 3, '/');
if (cp && cp < anon_part)
goto literal_copy;
prefix_len = scheme_prefix - url + 3;
}
anon_url = xcalloc(1, 1 + prefix_len + anon_len);
memcpy(anon_url, url, prefix_len);
memcpy(anon_url + prefix_len, anon_part, anon_len);
return anon_url;
literal_copy:
return xstrdup(url);
}
struct alternate_refs_data {
alternate_ref_fn *fn;
void *data;
};
static int refs_from_alternate_cb(struct alternate_object_database *e,
void *data)
{
char *other;
size_t len;
struct remote *remote;
struct transport *transport;
const struct ref *extra;
struct alternate_refs_data *cb = data;
e->name[-1] = '\0';
other = xstrdup(real_path(e->base));
e->name[-1] = '/';
len = strlen(other);
while (other[len-1] == '/')
other[--len] = '\0';
if (len < 8 || memcmp(other + len - 8, "/objects", 8))
goto out;
/* Is this a git repository with refs? */
memcpy(other + len - 8, "/refs", 6);
if (!is_directory(other))
goto out;
other[len - 8] = '\0';
remote = remote_get(other);
transport = transport_get(remote, other);
for (extra = transport_get_remote_refs(transport);
extra;
extra = extra->next)
cb->fn(extra, cb->data);
transport_disconnect(transport);
out:
free(other);
return 0;
}
void for_each_alternate_ref(alternate_ref_fn fn, void *data)
{
struct alternate_refs_data cb;
cb.fn = fn;
cb.data = data;
foreach_alt_odb(refs_from_alternate_cb, &cb);
}