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/*
* Copyright (c) 2006 Franck Bui-Huu
* Copyright (c) 2006 Rene Scharfe
*/
#include "cache.h"
#include "builtin.h"
#include "archive.h"
#include "transport.h"
#include "parse-options.h"
#include "pkt-line.h"
#include "sideband.h"
static void create_output_file(const char *output_file)
{
int output_fd = open(output_file, O_CREAT | O_WRONLY | O_TRUNC, 0666);
if (output_fd < 0)
die_errno("could not create archive file '%s'", output_file);
if (output_fd != 1) {
if (dup2(output_fd, 1) < 0)
die_errno("could not redirect output");
else
close(output_fd);
}
}
static int run_remote_archiver(int argc, const char **argv,
const char *remote, const char *exec)
{
char buf[LARGE_PACKET_MAX];
int fd[2], i, len, rv;
struct transport *transport;
struct remote *_remote;
_remote = remote_get(remote);
if (!_remote->url[0])
die("git archive: Remote with no URL");
transport = transport_get(_remote, _remote->url[0]);
transport_connect(transport, "git-upload-archive", exec, fd);
for (i = 1; i < argc; i++)
packet_write(fd[1], "argument %s\n", argv[i]);
packet_flush(fd[1]);
len = packet_read_line(fd[0], buf, sizeof(buf));
if (!len)
die("git archive: expected ACK/NAK, got EOF");
if (buf[len-1] == '\n')
buf[--len] = 0;
if (strcmp(buf, "ACK")) {
if (len > 5 && !prefixcmp(buf, "NACK "))
die("git archive: NACK %s", buf + 5);
die("git archive: protocol error");
}
len = packet_read_line(fd[0], buf, sizeof(buf));
if (len)
die("git archive: expected a flush");
/* Now, start reading from fd[0] and spit it out to stdout */
rv = recv_sideband("archive", fd[0], 1);
rv |= transport_disconnect(transport);
return !!rv;
}
static const char *format_from_name(const char *filename)
{
const char *ext = strrchr(filename, '.');
if (!ext)
return NULL;
ext++;
if (!strcasecmp(ext, "zip"))
return "--format=zip";
return NULL;
}
#define PARSE_OPT_KEEP_ALL ( PARSE_OPT_KEEP_DASHDASH | \
PARSE_OPT_KEEP_ARGV0 | \
PARSE_OPT_KEEP_UNKNOWN | \
PARSE_OPT_NO_INTERNAL_HELP )
int cmd_archive(int argc, const char **argv, const char *prefix)
{
const char *exec = "git-upload-archive";
const char *output = NULL;
const char *remote = NULL;
const char *format_option = NULL;
struct option local_opts[] = {
OPT_STRING('o', "output", &output, "file",
"write the archive to this file"),
OPT_STRING(0, "remote", &remote, "repo",
"retrieve the archive from remote repository <repo>"),
OPT_STRING(0, "exec", &exec, "cmd",
"path to the remote git-upload-archive command"),
OPT_END()
};
argc = parse_options(argc, argv, prefix, local_opts, NULL,
PARSE_OPT_KEEP_ALL);
if (output) {
create_output_file(output);
format_option = format_from_name(output);
}
/*
* We have enough room in argv[] to muck it in place, because
* --output must have been given on the original command line
* if we get to this point, and parse_options() must have eaten
* it, i.e. we can add back one element to the array.
*
* We add a fake --format option at the beginning, with the
* format inferred from our output filename. This way explicit
* --format options can override it, and the fake option is
* inserted before any "--" that might have been given.
*/
if (format_option) {
memmove(argv + 2, argv + 1, sizeof(*argv) * argc);
argv[1] = format_option;
argv[++argc] = NULL;
}
if (remote)
return run_remote_archiver(argc, argv, remote, exec);
setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
return write_archive(argc, argv, prefix, 1);
}