#include "diff.h"
#include "revision.h"
#include "quote.h"
+#include "remote.h"
+
+static int debug;
struct helper_data
{
struct child_process *helper;
FILE *out;
unsigned fetch : 1,
+ import : 1,
option : 1,
- push : 1;
+ push : 1,
+ connect : 1,
+ no_disconnect_req : 1;
+ /* These go from remote name (as in "list") to private name */
+ struct refspec *refspecs;
+ int refspec_nr;
+ /* Transport options for fetch-pack/send-pack (should one of
+ * those be invoked).
+ */
+ struct git_transport_options transport_options;
};
+static void sendline(struct helper_data *helper, struct strbuf *buffer)
+{
+ if (debug)
+ fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf);
+ if (write_in_full(helper->helper->in, buffer->buf, buffer->len)
+ != buffer->len)
+ die_errno("Full write to remote helper failed");
+}
+
+static int recvline_fh(FILE *helper, struct strbuf *buffer)
+{
+ strbuf_reset(buffer);
+ if (debug)
+ fprintf(stderr, "Debug: Remote helper: Waiting...\n");
+ if (strbuf_getline(buffer, helper, '\n') == EOF) {
+ if (debug)
+ fprintf(stderr, "Debug: Remote helper quit.\n");
+ exit(128);
+ }
+
+ if (debug)
+ fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf);
+ return 0;
+}
+
+static int recvline(struct helper_data *helper, struct strbuf *buffer)
+{
+ return recvline_fh(helper->out, buffer);
+}
+
+static void xchgline(struct helper_data *helper, struct strbuf *buffer)
+{
+ sendline(helper, buffer);
+ recvline(helper, buffer);
+}
+
+static void write_constant(int fd, const char *str)
+{
+ if (debug)
+ fprintf(stderr, "Debug: Remote helper: -> %s", str);
+ if (write_in_full(fd, str, strlen(str)) != strlen(str))
+ die_errno("Full write to remote helper failed");
+}
+
+const char *remove_ext_force(const char *url)
+{
+ if (url) {
+ const char *colon = strchr(url, ':');
+ if (colon && colon[1] == ':')
+ return colon + 2;
+ }
+ return url;
+}
+
+static void do_take_over(struct transport *transport)
+{
+ struct helper_data *data;
+ data = (struct helper_data *)transport->data;
+ transport_take_over(transport, data->helper);
+ fclose(data->out);
+ free(data);
+}
+
static struct child_process *get_helper(struct transport *transport)
{
struct helper_data *data = transport->data;
struct strbuf buf = STRBUF_INIT;
struct child_process *helper;
+ const char **refspecs = NULL;
+ int refspec_nr = 0;
+ int refspec_alloc = 0;
+ int duped;
+ int code;
if (data->helper)
return data->helper;
helper->out = -1;
helper->err = 0;
helper->argv = xcalloc(4, sizeof(*helper->argv));
- strbuf_addf(&buf, "remote-%s", data->name);
+ strbuf_addf(&buf, "git-remote-%s", data->name);
helper->argv[0] = strbuf_detach(&buf, NULL);
helper->argv[1] = transport->remote->name;
- helper->argv[2] = transport->url;
- helper->git_cmd = 1;
- if (start_command(helper))
- die("Unable to run helper: git %s", helper->argv[0]);
+ helper->argv[2] = remove_ext_force(transport->url);
+ helper->git_cmd = 0;
+ helper->silent_exec_failure = 1;
+ code = start_command(helper);
+ if (code < 0 && errno == ENOENT)
+ die("Unable to find remote helper for '%s'", data->name);
+ else if (code != 0)
+ exit(code);
+
data->helper = helper;
+ data->no_disconnect_req = 0;
+
+ /*
+ * Open the output as FILE* so strbuf_getline() can be used.
+ * Do this with duped fd because fclose() will close the fd,
+ * and stuff like taking over will require the fd to remain.
+ */
+ duped = dup(helper->out);
+ if (duped < 0)
+ die_errno("Can't dup helper output fd");
+ data->out = xfdopen(duped, "r");
- write_str_in_full(helper->in, "capabilities\n");
+ write_constant(helper->in, "capabilities\n");
- data->out = xfdopen(helper->out, "r");
while (1) {
- if (strbuf_getline(&buf, data->out, '\n') == EOF)
- exit(128); /* child died, message supplied already */
+ const char *capname;
+ int mandatory = 0;
+ recvline(data, &buf);
if (!*buf.buf)
break;
- if (!strcmp(buf.buf, "fetch"))
+
+ if (*buf.buf == '*') {
+ capname = buf.buf + 1;
+ mandatory = 1;
+ } else
+ capname = buf.buf;
+
+ if (debug)
+ fprintf(stderr, "Debug: Got cap %s\n", capname);
+ if (!strcmp(capname, "fetch"))
data->fetch = 1;
- if (!strcmp(buf.buf, "option"))
+ else if (!strcmp(capname, "option"))
data->option = 1;
- if (!strcmp(buf.buf, "push"))
+ else if (!strcmp(capname, "push"))
data->push = 1;
+ else if (!strcmp(capname, "import"))
+ data->import = 1;
+ else if (!data->refspecs && !prefixcmp(capname, "refspec ")) {
+ ALLOC_GROW(refspecs,
+ refspec_nr + 1,
+ refspec_alloc);
+ refspecs[refspec_nr++] = strdup(buf.buf + strlen("refspec "));
+ } else if (!strcmp(capname, "connect")) {
+ data->connect = 1;
+ } else if (mandatory) {
+ die("Unknown mandatory capability %s. This remote "
+ "helper probably needs newer version of Git.\n",
+ capname);
+ }
+ }
+ if (refspecs) {
+ int i;
+ data->refspec_nr = refspec_nr;
+ data->refspecs = parse_fetch_refspec(refspec_nr, refspecs);
+ for (i = 0; i < refspec_nr; i++) {
+ free((char *)refspecs[i]);
+ }
+ free(refspecs);
}
+ strbuf_release(&buf);
+ if (debug)
+ fprintf(stderr, "Debug: Capabilities complete.\n");
return data->helper;
}
static int disconnect_helper(struct transport *transport)
{
struct helper_data *data = transport->data;
+ struct strbuf buf = STRBUF_INIT;
+
if (data->helper) {
- write_str_in_full(data->helper->in, "\n");
+ if (debug)
+ fprintf(stderr, "Debug: Disconnecting.\n");
+ if (!data->no_disconnect_req) {
+ strbuf_addf(&buf, "\n");
+ sendline(data, &buf);
+ }
close(data->helper->in);
+ close(data->helper->out);
fclose(data->out);
finish_command(data->helper);
free((char *)data->helper->argv[0]);
free(data->helper);
data->helper = NULL;
}
- free(data);
return 0;
}
const char *name, const char *value)
{
struct helper_data *data = transport->data;
- struct child_process *helper = get_helper(transport);
struct strbuf buf = STRBUF_INIT;
int i, ret, is_bool = 0;
+ get_helper(transport);
+
if (!data->option)
return 1;
quote_c_style(value, &buf, NULL, 0);
strbuf_addch(&buf, '\n');
- if (write_in_full(helper->in, buf.buf, buf.len) != buf.len)
- die_errno("cannot send option to %s", data->name);
-
- strbuf_reset(&buf);
- if (strbuf_getline(&buf, data->out, '\n') == EOF)
- exit(128); /* child died, message supplied already */
+ xchgline(data, &buf);
if (!strcmp(buf.buf, "ok"))
ret = 0;
char buf[16];
int n;
int v = t->verbose;
- int no_progress = v < 0 || (!t->progress && !isatty(1));
+ int no_progress = v < 0 || (!t->progress && !isatty(2));
set_helper_option(t, "progress", !no_progress ? "true" : "false");
set_helper_option(t, "verbosity", buf);
}
+static int release_helper(struct transport *transport)
+{
+ struct helper_data *data = transport->data;
+ free_refspec(data->refspec_nr, data->refspecs);
+ data->refspecs = NULL;
+ disconnect_helper(transport);
+ free(transport->data);
+ return 0;
+}
+
static int fetch_with_fetch(struct transport *transport,
- int nr_heads, const struct ref **to_fetch)
+ int nr_heads, struct ref **to_fetch)
{
struct helper_data *data = transport->data;
int i;
}
strbuf_addch(&buf, '\n');
- if (write_in_full(data->helper->in, buf.buf, buf.len) != buf.len)
- die_errno("cannot send fetch to %s", data->name);
+ sendline(data, &buf);
while (1) {
- strbuf_reset(&buf);
- if (strbuf_getline(&buf, data->out, '\n') == EOF)
- exit(128); /* child died, message supplied already */
+ recvline(data, &buf);
if (!prefixcmp(buf.buf, "lock ")) {
const char *name = buf.buf + 5;
return 0;
}
+static int get_importer(struct transport *transport, struct child_process *fastimport)
+{
+ struct child_process *helper = get_helper(transport);
+ memset(fastimport, 0, sizeof(*fastimport));
+ fastimport->in = helper->out;
+ fastimport->argv = xcalloc(5, sizeof(*fastimport->argv));
+ fastimport->argv[0] = "fast-import";
+ fastimport->argv[1] = "--quiet";
+
+ fastimport->git_cmd = 1;
+ return start_command(fastimport);
+}
+
+static int fetch_with_import(struct transport *transport,
+ int nr_heads, struct ref **to_fetch)
+{
+ struct child_process fastimport;
+ struct helper_data *data = transport->data;
+ int i;
+ struct ref *posn;
+ struct strbuf buf = STRBUF_INIT;
+
+ get_helper(transport);
+
+ if (get_importer(transport, &fastimport))
+ die("Couldn't run fast-import");
+
+ for (i = 0; i < nr_heads; i++) {
+ posn = to_fetch[i];
+ if (posn->status & REF_STATUS_UPTODATE)
+ continue;
+
+ strbuf_addf(&buf, "import %s\n", posn->name);
+ sendline(data, &buf);
+ strbuf_reset(&buf);
+ }
+ disconnect_helper(transport);
+ finish_command(&fastimport);
+ free(fastimport.argv);
+ fastimport.argv = NULL;
+
+ for (i = 0; i < nr_heads; i++) {
+ char *private;
+ posn = to_fetch[i];
+ if (posn->status & REF_STATUS_UPTODATE)
+ continue;
+ if (data->refspecs)
+ private = apply_refspecs(data->refspecs, data->refspec_nr, posn->name);
+ else
+ private = strdup(posn->name);
+ read_ref(private, posn->old_sha1);
+ free(private);
+ }
+ strbuf_release(&buf);
+ return 0;
+}
+
+static int process_connect_service(struct transport *transport,
+ const char *name, const char *exec)
+{
+ struct helper_data *data = transport->data;
+ struct strbuf cmdbuf = STRBUF_INIT;
+ struct child_process *helper;
+ int r, duped, ret = 0;
+ FILE *input;
+
+ helper = get_helper(transport);
+
+ /*
+ * Yes, dup the pipe another time, as we need unbuffered version
+ * of input pipe as FILE*. fclose() closes the underlying fd and
+ * stream buffering only can be changed before first I/O operation
+ * on it.
+ */
+ duped = dup(helper->out);
+ if (duped < 0)
+ die_errno("Can't dup helper output fd");
+ input = xfdopen(duped, "r");
+ setvbuf(input, NULL, _IONBF, 0);
+
+ /*
+ * Handle --upload-pack and friends. This is fire and forget...
+ * just warn if it fails.
+ */
+ if (strcmp(name, exec)) {
+ r = set_helper_option(transport, "servpath", exec);
+ if (r > 0)
+ warning("Setting remote service path not supported by protocol.");
+ else if (r < 0)
+ warning("Invalid remote service path.");
+ }
+
+ if (data->connect)
+ strbuf_addf(&cmdbuf, "connect %s\n", name);
+ else
+ goto exit;
+
+ sendline(data, &cmdbuf);
+ recvline_fh(input, &cmdbuf);
+ if (!strcmp(cmdbuf.buf, "")) {
+ data->no_disconnect_req = 1;
+ if (debug)
+ fprintf(stderr, "Debug: Smart transport connection "
+ "ready.\n");
+ ret = 1;
+ } else if (!strcmp(cmdbuf.buf, "fallback")) {
+ if (debug)
+ fprintf(stderr, "Debug: Falling back to dumb "
+ "transport.\n");
+ } else
+ die("Unknown response to connect: %s",
+ cmdbuf.buf);
+
+exit:
+ fclose(input);
+ return ret;
+}
+
+static int process_connect(struct transport *transport,
+ int for_push)
+{
+ struct helper_data *data = transport->data;
+ const char *name;
+ const char *exec;
+
+ name = for_push ? "git-receive-pack" : "git-upload-pack";
+ if (for_push)
+ exec = data->transport_options.receivepack;
+ else
+ exec = data->transport_options.uploadpack;
+
+ return process_connect_service(transport, name, exec);
+}
+
+static int connect_helper(struct transport *transport, const char *name,
+ const char *exec, int fd[2])
+{
+ struct helper_data *data = transport->data;
+
+ /* Get_helper so connect is inited. */
+ get_helper(transport);
+ if (!data->connect)
+ die("Operation not supported by protocol.");
+
+ if (!process_connect_service(transport, name, exec))
+ die("Can't connect to subservice %s.", name);
+
+ fd[0] = data->helper->out;
+ fd[1] = data->helper->in;
+ return 0;
+}
+
static int fetch(struct transport *transport,
- int nr_heads, const struct ref **to_fetch)
+ int nr_heads, struct ref **to_fetch)
{
struct helper_data *data = transport->data;
int i, count;
+ if (process_connect(transport, 0)) {
+ do_take_over(transport);
+ return transport->fetch(transport, nr_heads, to_fetch);
+ }
+
count = 0;
for (i = 0; i < nr_heads; i++)
if (!(to_fetch[i]->status & REF_STATUS_UPTODATE))
if (data->fetch)
return fetch_with_fetch(transport, nr_heads, to_fetch);
+ if (data->import)
+ return fetch_with_import(transport, nr_heads, to_fetch);
+
return -1;
}
struct child_process *helper;
struct ref *ref;
- if (!remote_refs)
+ if (process_connect(transport, 1)) {
+ do_take_over(transport);
+ return transport->push_refs(transport, remote_refs, flags);
+ }
+
+ if (!remote_refs) {
+ fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
+ "Perhaps you should specify a branch such as 'master'.\n");
return 0;
+ }
helper = get_helper(transport);
if (!data->push)
return 1;
for (ref = remote_refs; ref; ref = ref->next) {
- if (ref->peer_ref)
- hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
- else if (!mirror)
+ if (!ref->peer_ref && !mirror)
continue;
- ref->deletion = is_null_sha1(ref->new_sha1);
- if (!ref->deletion &&
- !hashcmp(ref->old_sha1, ref->new_sha1)) {
- ref->status = REF_STATUS_UPTODATE;
+ /* Check for statuses set by set_ref_status_for_push() */
+ switch (ref->status) {
+ case REF_STATUS_REJECT_NONFASTFORWARD:
+ case REF_STATUS_UPTODATE:
continue;
+ default:
+ ; /* do nothing */
}
if (force_all)
}
strbuf_addch(&buf, '\n');
- if (write_in_full(helper->in, buf.buf, buf.len) != buf.len)
- exit(128);
+ sendline(data, &buf);
ref = remote_refs;
while (1) {
char *refname, *msg;
int status;
- strbuf_reset(&buf);
- if (strbuf_getline(&buf, data->out, '\n') == EOF)
- exit(128); /* child died, message supplied already */
+ recvline(data, &buf);
if (!buf.len)
break;
continue;
}
+ if (ref->status != REF_STATUS_NONE) {
+ /*
+ * Earlier, the ref was marked not to be pushed, so ignore the ref
+ * status reported by the remote helper if the latter is 'no match'.
+ */
+ if (status == REF_STATUS_NONE)
+ continue;
+ }
+
ref->status = status;
ref->remote_status = msg;
}
return 0;
}
+static int has_attribute(const char *attrs, const char *attr) {
+ int len;
+ if (!attrs)
+ return 0;
+
+ len = strlen(attr);
+ for (;;) {
+ const char *space = strchrnul(attrs, ' ');
+ if (len == space - attrs && !strncmp(attrs, attr, len))
+ return 1;
+ if (!*space)
+ return 0;
+ attrs = space + 1;
+ }
+}
+
static struct ref *get_refs_list(struct transport *transport, int for_push)
{
struct helper_data *data = transport->data;
helper = get_helper(transport);
+ if (process_connect(transport, for_push)) {
+ do_take_over(transport);
+ return transport->get_refs_list(transport, for_push);
+ }
+
if (data->push && for_push)
write_str_in_full(helper->in, "list for-push\n");
else
while (1) {
char *eov, *eon;
- if (strbuf_getline(&buf, data->out, '\n') == EOF)
- exit(128); /* child died, message supplied already */
+ recvline(data, &buf);
if (!*buf.buf)
break;
(*tail)->symref = xstrdup(buf.buf + 1);
else if (buf.buf[0] != '?')
get_sha1_hex(buf.buf, (*tail)->old_sha1);
+ if (eon) {
+ if (has_attribute(eon + 1, "unchanged")) {
+ (*tail)->status |= REF_STATUS_UPTODATE;
+ read_ref((*tail)->name, (*tail)->old_sha1);
+ }
+ }
tail = &((*tail)->next);
}
+ if (debug)
+ fprintf(stderr, "Debug: Read ref listing.\n");
strbuf_release(&buf);
for (posn = ret; posn; posn = posn->next)
struct helper_data *data = xcalloc(sizeof(*data), 1);
data->name = name;
+ if (getenv("GIT_TRANSPORT_HELPER_DEBUG"))
+ debug = 1;
+
transport->data = data;
transport->set_option = set_helper_option;
transport->get_refs_list = get_refs_list;
transport->fetch = fetch;
transport->push_refs = push_refs;
- transport->disconnect = disconnect_helper;
+ transport->disconnect = release_helper;
+ transport->connect = connect_helper;
+ transport->smart_options = &(data->transport_options);
return 0;
}