git/unpack-file.c
Jonathan Nieder 1507301204 Show usage string for 'git unpack-file -h'
"unpack-file -h" could be asking to save the contents of a blob
named "-h".  Strictly speaking, such a pathological ref name is
possible, but the user would have to had said something like
"tags/-h" to name such a pathological ref already.  When used in
scripts, unpack-file is typically not passed a user-supplied tag
name directly.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-11-10 11:06:57 -08:00

42 lines
867 B
C

#include "cache.h"
#include "blob.h"
#include "exec_cmd.h"
static char *create_temp_file(unsigned char *sha1)
{
static char path[50];
void *buf;
enum object_type type;
unsigned long size;
int fd;
buf = read_sha1_file(sha1, &type, &size);
if (!buf || type != OBJ_BLOB)
die("unable to read blob object %s", sha1_to_hex(sha1));
strcpy(path, ".merge_file_XXXXXX");
fd = xmkstemp(path);
if (write_in_full(fd, buf, size) != size)
die_errno("unable to write temp-file");
close(fd);
return path;
}
int main(int argc, char **argv)
{
unsigned char sha1[20];
git_extract_argv0_path(argv[0]);
if (argc != 2 || !strcmp(argv[1], "-h"))
usage("git unpack-file <sha1>");
if (get_sha1(argv[1], sha1))
die("Not a valid object name %s", argv[1]);
setup_git_directory();
git_config(git_default_config, NULL);
puts(create_temp_file(sha1));
return 0;
}