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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 "commit.h"
#include "tree-walk.h"
#include "exec_cmd.h"
#include "pkt-line.h"
#include "sideband.h"
static const char archive_usage[] = \
"git-archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
static struct archiver_desc
{
const char *name;
write_archive_fn_t write_archive;
parse_extra_args_fn_t parse_extra;
} archivers[] = {
{ "tar", write_tar_archive, NULL },
{ "zip", write_zip_archive, parse_extra_zip_args },
};
static int run_remote_archiver(const char *remote, int argc,
const char **argv)
{
char *url, buf[LARGE_PACKET_MAX];
int fd[2], i, len, rv;
pid_t pid;
const char *exec = "git-upload-archive";
int exec_at = 0;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!prefixcmp(arg, "--exec=")) {
if (exec_at)
die("multiple --exec specified");
exec = arg + 7;
exec_at = i;
break;
}
}
url = xstrdup(remote);
pid = git_connect(fd, url, exec, 0);
if (pid < 0)
return pid;
for (i = 1; i < argc; i++) {
if (i == exec_at)
continue;
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, 2);
close(fd[0]);
close(fd[1]);
rv |= finish_connect(pid);
return !!rv;
}
static int init_archiver(const char *name, struct archiver *ar)
{
int rv = -1, i;
for (i = 0; i < ARRAY_SIZE(archivers); i++) {
if (!strcmp(name, archivers[i].name)) {
memset(ar, 0, sizeof(*ar));
ar->name = archivers[i].name;
ar->write_archive = archivers[i].write_archive;
ar->parse_extra = archivers[i].parse_extra;
rv = 0;
break;
}
}
return rv;
}
void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
{
ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
}
void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
const char *prefix)
{
const char *name = argv[0];
const unsigned char *commit_sha1;
time_t archive_time;
struct tree *tree;
struct commit *commit;
unsigned char sha1[20];
if (get_sha1(name, sha1))
die("Not a valid object name");
commit = lookup_commit_reference_gently(sha1, 1);
if (commit) {
commit_sha1 = commit->object.sha1;
archive_time = commit->date;
} else {
commit_sha1 = NULL;
archive_time = time(NULL);
}
tree = parse_tree_indirect(sha1);
if (tree == NULL)
die("not a tree object");
if (prefix) {
unsigned char tree_sha1[20];
unsigned int mode;
int err;
err = get_tree_entry(tree->object.sha1, prefix,
tree_sha1, &mode);
if (err || !S_ISDIR(mode))
die("current working directory is untracked");
tree = parse_tree_indirect(tree_sha1);
}
ar_args->tree = tree;
ar_args->commit_sha1 = commit_sha1;
ar_args->time = archive_time;
}
int parse_archive_args(int argc, const char **argv, struct archiver *ar)
{
const char *extra_argv[MAX_EXTRA_ARGS];
int extra_argc = 0;
const char *format = "tar";
const char *base = "";
int verbose = 0;
int i;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
for (i = 0; i < ARRAY_SIZE(archivers); i++)
printf("%s\n", archivers[i].name);
exit(0);
}
if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
verbose = 1;
continue;
}
if (!prefixcmp(arg, "--format=")) {
format = arg + 9;
continue;
}
if (!prefixcmp(arg, "--prefix=")) {
base = arg + 9;
continue;
}
if (!strcmp(arg, "--")) {
i++;
break;
}
if (arg[0] == '-') {
if (extra_argc > MAX_EXTRA_ARGS - 1)
die("Too many extra options");
extra_argv[extra_argc++] = arg;
continue;
}
break;
}
/* We need at least one parameter -- tree-ish */
if (argc - 1 < i)
usage(archive_usage);
if (init_archiver(format, ar) < 0)
die("Unknown archive format '%s'", format);
if (extra_argc) {
if (!ar->parse_extra)
die("'%s' format does not handle %s",
ar->name, extra_argv[0]);
ar->args.extra = ar->parse_extra(extra_argc, extra_argv);
}
ar->args.verbose = verbose;
ar->args.base = base;
return i;
}
static const char *extract_remote_arg(int *ac, const char **av)
{
int ix, iy, cnt = *ac;
int no_more_options = 0;
const char *remote = NULL;
for (ix = iy = 1; ix < cnt; ix++) {
const char *arg = av[ix];
if (!strcmp(arg, "--"))
no_more_options = 1;
if (!no_more_options) {
if (!prefixcmp(arg, "--remote=")) {
if (remote)
die("Multiple --remote specified");
remote = arg + 9;
continue;
}
if (arg[0] != '-')
no_more_options = 1;
}
if (ix != iy)
av[iy] = arg;
iy++;
}
if (remote) {
av[--cnt] = NULL;
*ac = cnt;
}
return remote;
}
int cmd_archive(int argc, const char **argv, const char *prefix)
{
struct archiver ar;
int tree_idx;
const char *remote = NULL;
remote = extract_remote_arg(&argc, argv);
if (remote)
return run_remote_archiver(remote, argc, argv);
setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
memset(&ar, 0, sizeof(ar));
tree_idx = parse_archive_args(argc, argv, &ar);
if (prefix == NULL)
prefix = setup_git_directory();
argv += tree_idx;
parse_treeish_arg(argv, &ar.args, prefix);
parse_pathspec_arg(argv + 1, &ar.args);
return ar.write_archive(&ar.args);
}
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