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/*
* Copyright (c) 2005, 2006 Rene Scharfe
*/
#include "cache.h"
#include "commit.h"
#include "tar.h"
#include "builtin.h"
#include "quote.h"
static const char builtin_get_tar_commit_id_usage[] =
"git get-tar-commit-id < <tarfile>";
/* ustar header + extended global header content */
#define RECORDSIZE (512)
#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;
if (argc != 1)
usage(builtin_get_tar_commit_id_usage);
n = read_in_full(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 = write_in_full(1, content + 11, 41);
if (n < 41)
die_errno("git get-tar-commit-id: write error");
return 0;
}
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