root/builtin/unpack-file.c

DEFINITIONS

1. create_temp_file
2. cmd_unpack_file

#include "builtin.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 cmd_unpack_file(int argc, const char **argv, const char *prefix)
{
        unsigned char sha1[20];

        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]);

        git_config(git_default_config, NULL);

        puts(create_temp_file(sha1));
        return 0;
}