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/*
* Copyright (c) 2005, 2006 Rene Scharfe
*/
#include <time.h>
#include "cache.h"
#include "commit.h"
#include "tar.h"
#include "builtin.h"
#include "pkt-line.h"
#include "archive.h"
#define RECORDSIZE (512)
#define BLOCKSIZE (RECORDSIZE * 20)
static const char tar_tree_usage[] =
"git-tar-tree [--remote=<repo>] <tree-ish> [basedir]";
static int generate_tar(int argc, const char **argv, const char *prefix)
{
struct archiver_args args;
int result;
char *base = NULL;
memset(&args, 0, sizeof(args));
if (argc != 2 && argc != 3)
usage(tar_tree_usage);
if (argc == 3) {
int baselen = strlen(argv[2]);
base = xmalloc(baselen + 2);
memcpy(base, argv[2], baselen);
base[baselen] = '/';
base[baselen + 1] = '\0';
}
args.base = base;
parse_treeish_arg(argv + 1, &args, NULL);
result = write_tar_archive(&args);
free(base);
return result;
}
static const char *exec = "git-upload-tar";
static int remote_tar(int argc, const char **argv)
{
int fd[2], ret, len;
pid_t pid;
char buf[1024];
char *url;
if (argc < 3 || 4 < argc)
usage(tar_tree_usage);
/* --remote=<repo> */
url = xstrdup(argv[1]+9);
pid = git_connect(fd, url, exec);
if (pid < 0)
return 1;
packet_write(fd[1], "want %s\n", argv[2]);
if (argv[3])
packet_write(fd[1], "base %s\n", argv[3]);
packet_flush(fd[1]);
len = packet_read_line(fd[0], buf, sizeof(buf));
if (!len)
die("git-tar-tree: expected ACK/NAK, got EOF");
if (buf[len-1] == '\n')
buf[--len] = 0;
if (strcmp(buf, "ACK")) {
if (5 < len && !strncmp(buf, "NACK ", 5))
die("git-tar-tree: NACK %s", buf + 5);
die("git-tar-tree: protocol error");
}
/* expect a flush */
len = packet_read_line(fd[0], buf, sizeof(buf));
if (len)
die("git-tar-tree: expected a flush");
/* Now, start reading from fd[0] and spit it out to stdout */
ret = copy_fd(fd[0], 1);
close(fd[0]);
ret |= finish_connect(pid);
return !!ret;
}
int cmd_tar_tree(int argc, const char **argv, const char *prefix)
{
if (argc < 2)
usage(tar_tree_usage);
if (!strncmp("--remote=", argv[1], 9))
return remote_tar(argc, argv);
return generate_tar(argc, argv, prefix);
}
/* ustar header + extended global header content */
#define HEADERSIZE (2 * RECORDSIZE)
int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
{
char buffer[HEADERSIZE];
struct ustar_header *header = (struct ustar_header *)buffer;
char *content = buffer + RECORDSIZE;
ssize_t n;
n = xread(0, buffer, HEADERSIZE);
if (n < HEADERSIZE)
die("git-get-tar-commit-id: read error");
if (header->typeflag[0] != 'g')
return 1;
if (memcmp(content, "52 comment=", 11))
return 1;
n = xwrite(1, content + 11, 41);
if (n < 41)
die("git-get-tar-commit-id: write error");
return 0;
}
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