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#include "cache.h"
#include "transport.h"
#include "run-command.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
struct helper_data
{
const char *name;
struct child_process *helper;
unsigned fetch : 1;
};
static struct child_process *get_helper(struct transport *transport)
{
struct helper_data *data = transport->data;
struct strbuf buf = STRBUF_INIT;
struct child_process *helper;
FILE *file;
if (data->helper)
return data->helper;
helper = xcalloc(1, sizeof(*helper));
helper->in = -1;
helper->out = -1;
helper->err = 0;
helper->argv = xcalloc(4, sizeof(*helper->argv));
strbuf_addf(&buf, "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]);
data->helper = helper;
strbuf_addstr(&buf, "capabilities\n");
write_in_full(helper->in, buf.buf, buf.len);
strbuf_reset(&buf);
file = fdopen(helper->out, "r");
while (1) {
if (strbuf_getline(&buf, file, '\n') == EOF)
exit(128); /* child died, message supplied already */
if (!*buf.buf)
break;
if (!strcmp(buf.buf, "fetch"))
data->fetch = 1;
}
return data->helper;
}
static int disconnect_helper(struct transport *transport)
{
struct helper_data *data = transport->data;
if (data->helper) {
write_in_full(data->helper->in, "\n", 1);
close(data->helper->in);
finish_command(data->helper);
free((char *)data->helper->argv[0]);
free(data->helper->argv);
free(data->helper);
data->helper = NULL;
}
return 0;
}
static int fetch_with_fetch(struct transport *transport,
int nr_heads, const struct ref **to_fetch)
{
struct child_process *helper = get_helper(transport);
FILE *file = fdopen(helper->out, "r");
int i;
struct strbuf buf = STRBUF_INIT;
for (i = 0; i < nr_heads; i++) {
const struct ref *posn = to_fetch[i];
if (posn->status & REF_STATUS_UPTODATE)
continue;
strbuf_addf(&buf, "fetch %s %s\n",
sha1_to_hex(posn->old_sha1), posn->name);
write_in_full(helper->in, buf.buf, buf.len);
strbuf_reset(&buf);
if (strbuf_getline(&buf, file, '\n') == EOF)
exit(128); /* child died, message supplied already */
}
return 0;
}
static int fetch(struct transport *transport,
int nr_heads, const struct ref **to_fetch)
{
struct helper_data *data = transport->data;
int i, count;
count = 0;
for (i = 0; i < nr_heads; i++)
if (!(to_fetch[i]->status & REF_STATUS_UPTODATE))
count++;
if (!count)
return 0;
if (data->fetch)
return fetch_with_fetch(transport, nr_heads, to_fetch);
return -1;
}
static struct ref *get_refs_list(struct transport *transport, int for_push)
{
struct child_process *helper;
struct ref *ret = NULL;
struct ref **tail = &ret;
struct ref *posn;
struct strbuf buf = STRBUF_INIT;
FILE *file;
helper = get_helper(transport);
strbuf_addstr(&buf, "list\n");
write_in_full(helper->in, buf.buf, buf.len);
strbuf_reset(&buf);
file = fdopen(helper->out, "r");
while (1) {
char *eov, *eon;
if (strbuf_getline(&buf, file, '\n') == EOF)
exit(128); /* child died, message supplied already */
if (!*buf.buf)
break;
eov = strchr(buf.buf, ' ');
if (!eov)
die("Malformed response in ref list: %s", buf.buf);
eon = strchr(eov + 1, ' ');
*eov = '\0';
if (eon)
*eon = '\0';
*tail = alloc_ref(eov + 1);
if (buf.buf[0] == '@')
(*tail)->symref = xstrdup(buf.buf + 1);
else if (buf.buf[0] != '?')
get_sha1_hex(buf.buf, (*tail)->old_sha1);
tail = &((*tail)->next);
}
strbuf_release(&buf);
for (posn = ret; posn; posn = posn->next)
resolve_remote_symref(posn, ret);
return ret;
}
int transport_helper_init(struct transport *transport, const char *name)
{
struct helper_data *data = xcalloc(sizeof(*data), 1);
data->name = name;
transport->data = data;
transport->get_refs_list = get_refs_list;
transport->fetch = fetch;
transport->disconnect = disconnect_helper;
return 0;
}
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