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#ifndef TRANSPORT_H
#define TRANSPORT_H
 
#include "cache.h"
#include "remote.h"
 
struct transport {
	struct remote *remote;
	const char *url;
	void *data;
	struct ref *remote_refs;
 
	/**
	 * Returns 0 if successful, positive if the option is not
	 * recognized or is inapplicable, and negative if the option
	 * is applicable but the value is invalid.
	 **/
	int (*set_option)(struct transport *connection, const char *name,
			  const char *value);
 
	struct ref *(*get_refs_list)(const struct transport *transport);
	int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
	int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
 
	int (*disconnect)(struct transport *connection);
	char *pack_lockfile;
	unsigned verbose : 1;
};
 
#define TRANSPORT_PUSH_ALL 1
#define TRANSPORT_PUSH_FORCE 2
 
/* Returns a transport suitable for the url */
struct transport *transport_get(struct remote *, const char *);
 
/* Transport options which apply to git:// and scp-style URLs */
 
/* The program to use on the remote side to send a pack */
#define TRANS_OPT_UPLOADPACK "uploadpack"
 
/* The program to use on the remote side to receive a pack */
#define TRANS_OPT_RECEIVEPACK "receivepack"
 
/* Transfer the data as a thin pack if not null */
#define TRANS_OPT_THIN "thin"
 
/* Keep the pack that was transferred if not null */
#define TRANS_OPT_KEEP "keep"
 
/* Unpack the objects if fewer than this number of objects are fetched */
#define TRANS_OPT_UNPACKLIMIT "unpacklimit"
 
/* Limit the depth of the fetch if not null */
#define TRANS_OPT_DEPTH "depth"
 
/**
 * Returns 0 if the option was used, non-zero otherwise. Prints a
 * message to stderr if the option is not used.
 **/
int transport_set_option(struct transport *transport, const char *name,
			 const char *value);
 
int transport_push(struct transport *connection,
		   int refspec_nr, const char **refspec, int flags);
 
struct ref *transport_get_remote_refs(struct transport *transport);
 
int transport_fetch_refs(struct transport *transport, struct ref *refs);
void transport_unlock_pack(struct transport *transport);
int transport_disconnect(struct transport *transport);
 
#endif