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blob 6842a6c499631a26d2caa3421ac9b1d2cec212f2 991 bytes (raw)
name: builtin/unpack-file.c 	 # note: path name is non-authoritative(*)

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#include "builtin.h"
#include "config.h"
#include "hex.h"
#include "object-name.h"
#include "object-store-ll.h"
#include "wrapper.h"

static char *create_temp_file(struct object_id *oid)
{
	static char path[50];
	void *buf;
	enum object_type type;
	unsigned long size;
	int fd;

	buf = repo_read_object_file(the_repository, oid, &type, &size);
	if (!buf || type != OBJ_BLOB)
		die("unable to read blob object %s", oid_to_hex(oid));

	xsnprintf(path, sizeof(path), ".merge_file_XXXXXX");
	fd = xmkstemp(path);
	if (write_in_full(fd, buf, size) < 0)
		die_errno("unable to write temp-file");
	close(fd);
	free(buf);
	return path;
}

int cmd_unpack_file(int argc, const char **argv, const char *prefix UNUSED)
{
	struct object_id oid;

	if (argc != 2 || !strcmp(argv[1], "-h"))
		usage("git unpack-file <blob>");
	if (repo_get_oid(the_repository, argv[1], &oid))
		die("Not a valid object name %s", argv[1]);

	git_config(git_default_config, NULL);

	puts(create_temp_file(&oid));
	return 0;
}

debug log:

solving 6842a6c499 ...
found 6842a6c499 in https://80x24.org/lore/pub/scm/git/git.git/

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

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