1 files changed, 327 insertions, 0 deletions
diff --git a/transport.h b/transport.h
new file mode 100644
index 0000000..b5bf7b3
--- /dev/null
+++ b/transport.h
@@ -0,0 +1,327 @@
+#ifndef TRANSPORT_H
+#define TRANSPORT_H
+
+#include "cache.h"
+#include "run-command.h"
+#include "remote.h"
+#include "list-objects-filter-options.h"
+#include "string-list.h"
+
+struct git_transport_options {
+	unsigned thin : 1;
+	unsigned keep : 1;
+	unsigned followtags : 1;
+	unsigned check_self_contained_and_connected : 1;
+	unsigned self_contained_and_connected : 1;
+	unsigned update_shallow : 1;
+	unsigned reject_shallow : 1;
+	unsigned deepen_relative : 1;
+	unsigned refetch : 1;
+
+	/* see documentation of corresponding flag in fetch-pack.h */
+	unsigned from_promisor : 1;
+
+	/*
+	 * If this transport supports connect or stateless-connect,
+	 * the corresponding field in struct fetch_pack_args is copied
+	 * here after fetching.
+	 *
+	 * See the definition of connectivity_checked in struct
+	 * fetch_pack_args for more information.
+	 */
+	unsigned connectivity_checked:1;
+
+	int depth;
+	const char *deepen_since;
+	const struct string_list *deepen_not;
+	const char *uploadpack;
+	const char *receivepack;
+	struct push_cas_option *cas;
+	struct list_objects_filter_options filter_options;
+
+	/*
+	 * This is only used during fetch. See the documentation of
+	 * negotiation_tips in struct fetch_pack_args.
+	 *
+	 * This field is only supported by transports that support connect or
+	 * stateless_connect. Set this field directly instead of using
+	 * transport_set_option().
+	 */
+	struct oid_array *negotiation_tips;
+
+	/*
+	 * If allocated, whenever transport_fetch_refs() is called, add known
+	 * common commits to this oidset instead of fetching any packfiles.
+	 */
+	struct oidset *acked_commits;
+};
+
+enum transport_family {
+	TRANSPORT_FAMILY_ALL = 0,
+	TRANSPORT_FAMILY_IPV4,
+	TRANSPORT_FAMILY_IPV6
+};
+
+struct transport {
+	const struct transport_vtable *vtable;
+
+	struct remote *remote;
+	const char *url;
+	void *data;
+	const struct ref *remote_refs;
+
+	/**
+	 * Indicates whether we already called get_refs_list(); set by
+	 * transport.c::transport_get_remote_refs().
+	 */
+	unsigned got_remote_refs : 1;
+
+	/*
+	 * Transports that call take-over destroys the data specific to
+	 * the transport type while doing so, and cannot be reused.
+	 */
+	unsigned cannot_reuse : 1;
+
+	/*
+	 * A hint from caller that it will be performing a clone, not
+	 * normal fetch. IOW the repository is guaranteed empty.
+	 */
+	unsigned cloning : 1;
+
+	/*
+	 * Indicates that the transport is connected via a half-duplex
+	 * connection and should operate in stateless-rpc mode.
+	 */
+	unsigned stateless_rpc : 1;
+
+	/*
+	 * These strings will be passed to the {pre, post}-receive hook,
+	 * on the remote side, if both sides support the push options capability.
+	 */
+	const struct string_list *push_options;
+
+	/*
+	 * These strings will be passed to the remote side on each command
+	 * request, if both sides support the server-option capability.
+	 */
+	const struct string_list *server_options;
+
+	struct string_list pack_lockfiles;
+
+	signed verbose : 3;
+	/**
+	 * Transports should not set this directly, and should use this
+	 * value without having to check isatty(2), -q/--quiet
+	 * (transport->verbose < 0), etc. - checking has already been done
+	 * in transport_set_verbosity().
+	 **/
+	unsigned progress : 1;
+	/*
+	 * If transport is at least potentially smart, this points to
+	 * git_transport_options structure to use in case transport
+	 * actually turns out to be smart.
+	 */
+	struct git_transport_options *smart_options;
+
+	enum transport_family family;
+
+	const struct git_hash_algo *hash_algo;
+};
+
+#define TRANSPORT_PUSH_ALL			(1<<0)
+#define TRANSPORT_PUSH_FORCE			(1<<1)
+#define TRANSPORT_PUSH_DRY_RUN			(1<<2)
+#define TRANSPORT_PUSH_MIRROR			(1<<3)
+#define TRANSPORT_PUSH_PORCELAIN		(1<<4)
+#define TRANSPORT_PUSH_SET_UPSTREAM		(1<<5)
+#define TRANSPORT_RECURSE_SUBMODULES_CHECK	(1<<6)
+#define TRANSPORT_PUSH_PRUNE			(1<<7)
+#define TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND	(1<<8)
+#define TRANSPORT_PUSH_NO_HOOK			(1<<9)
+#define TRANSPORT_PUSH_FOLLOW_TAGS		(1<<10)
+#define TRANSPORT_PUSH_CERT_ALWAYS		(1<<11)
+#define TRANSPORT_PUSH_CERT_IF_ASKED		(1<<12)
+#define TRANSPORT_PUSH_ATOMIC			(1<<13)
+#define TRANSPORT_PUSH_OPTIONS			(1<<14)
+#define TRANSPORT_RECURSE_SUBMODULES_ONLY	(1<<15)
+#define TRANSPORT_PUSH_FORCE_IF_INCLUDES	(1<<16)
+#define TRANSPORT_PUSH_AUTO_UPSTREAM		(1<<17)
+
+int transport_summary_width(const struct ref *refs);
+
+/* Returns a transport suitable for the url */
+struct transport *transport_get(struct remote *, const char *);
+
+/*
+ * Check whether a transport is allowed by the environment.
+ *
+ * Type should generally be the URL scheme, as described in
+ * Documentation/git.txt
+ *
+ * from_user specifies if the transport was given by the user.  If unknown pass
+ * a -1 to read from the environment to determine if the transport was given by
+ * the user.
+ *
+ */
+int is_transport_allowed(const char *type, int from_user);
+
+/*
+ * Check whether a transport is allowed by the environment,
+ * and die otherwise.
+ */
+void transport_check_allowed(const char *type);
+
+/* 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"
+
+/* Check the current value of the remote ref */
+#define TRANS_OPT_CAS "cas"
+
+/* Keep the pack that was transferred if not null */
+#define TRANS_OPT_KEEP "keep"
+
+/* Limit the depth of the fetch if not null */
+#define TRANS_OPT_DEPTH "depth"
+
+/* Limit the depth of the fetch based on time if not null */
+#define TRANS_OPT_DEEPEN_SINCE "deepen-since"
+
+/* Limit the depth of the fetch based on revs if not null */
+#define TRANS_OPT_DEEPEN_NOT "deepen-not"
+
+/* Limit the deepen of the fetch if not null */
+#define TRANS_OPT_DEEPEN_RELATIVE "deepen-relative"
+
+/* Aggressively fetch annotated tags if possible */
+#define TRANS_OPT_FOLLOWTAGS "followtags"
+
+/* Reject shallow repo transport */
+#define TRANS_OPT_REJECT_SHALLOW "rejectshallow"
+
+/* Accept refs that may update .git/shallow without --depth */
+#define TRANS_OPT_UPDATE_SHALLOW "updateshallow"
+
+/* Send push certificates */
+#define TRANS_OPT_PUSH_CERT "pushcert"
+
+/* Indicate that these objects are being fetched by a promisor */
+#define TRANS_OPT_FROM_PROMISOR "from-promisor"
+
+/* Filter objects for partial clone and fetch */
+#define TRANS_OPT_LIST_OBJECTS_FILTER "filter"
+
+/* Refetch all objects without negotiating */
+#define TRANS_OPT_REFETCH "refetch"
+
+/* Request atomic (all-or-nothing) updates when pushing */
+#define TRANS_OPT_ATOMIC "atomic"
+
+/* Require remote changes to be integrated locally. */
+#define TRANS_OPT_FORCE_IF_INCLUDES "force-if-includes"
+
+/**
+ * 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);
+void transport_set_verbosity(struct transport *transport, int verbosity,
+	int force_progress);
+
+#define REJECT_NON_FF_HEAD      0x01
+#define REJECT_NON_FF_OTHER     0x02
+#define REJECT_ALREADY_EXISTS   0x04
+#define REJECT_FETCH_FIRST      0x08
+#define REJECT_NEEDS_FORCE      0x10
+#define REJECT_REF_NEEDS_UPDATE 0x20
+
+int transport_push(struct repository *repo,
+		   struct transport *connection,
+		   struct refspec *rs, int flags,
+		   unsigned int * reject_reasons);
+
+struct transport_ls_refs_options {
+	/*
+	 * Optionally, a list of ref prefixes can be provided which can be sent
+	 * to the server (when communicating using protocol v2) to enable it to
+	 * limit the ref advertisement.  Since ref filtering is done on the
+	 * server's end (and only when using protocol v2),
+	 * transport_get_remote_refs() could return refs which don't match the
+	 * provided ref_prefixes.
+	 */
+	struct strvec ref_prefixes;
+
+	/*
+	 * If unborn_head_target is not NULL, and the remote reports HEAD as
+	 * pointing to an unborn branch, transport_get_remote_refs() stores the
+	 * unborn branch in unborn_head_target.
+	 */
+	const char *unborn_head_target;
+};
+#define TRANSPORT_LS_REFS_OPTIONS_INIT { \
+	.ref_prefixes = STRVEC_INIT, \
+}
+
+/**
+ * Release the "struct transport_ls_refs_options".
+ */
+void transport_ls_refs_options_release(struct transport_ls_refs_options *opts);
+
+/*
+ * Retrieve refs from a remote.
+ */
+const struct ref *transport_get_remote_refs(struct transport *transport,
+					    struct transport_ls_refs_options *transport_options);
+
+/*
+ * Fetch the hash algorithm used by a remote.
+ *
+ * This can only be called after fetching the remote refs.
+ */
+const struct git_hash_algo *transport_get_hash_algo(struct transport *transport);
+int transport_fetch_refs(struct transport *transport, struct ref *refs);
+
+/*
+ * If this flag is set, unlocking will avoid to call non-async-signal-safe
+ * functions. This will necessarily leave behind some data structures which
+ * cannot be cleaned up.
+ */
+#define TRANSPORT_UNLOCK_PACK_IN_SIGNAL_HANDLER (1 << 0)
+
+/*
+ * Unlock all packfiles locked by the transport.
+ */
+void transport_unlock_pack(struct transport *transport, unsigned int flags);
+
+int transport_disconnect(struct transport *transport);
+char *transport_anonymize_url(const char *url);
+void transport_take_over(struct transport *transport,
+			 struct child_process *child);
+
+int transport_connect(struct transport *transport, const char *name,
+		      const char *exec, int fd[2]);
+
+/* Transport methods defined outside transport.c */
+int transport_helper_init(struct transport *transport, const char *name);
+int bidirectional_transfer_loop(int input, int output);
+
+/* common methods used by transport.c and builtin/send-pack.c */
+void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose);
+
+int transport_refs_pushed(struct ref *ref);
+
+void transport_print_push_status(const char *dest, struct ref *refs,
+		  int verbose, int porcelain, unsigned int *reject_reasons);
+
+/* common method used by transport-helper.c and send-pack.c */
+void reject_atomic_push(struct ref *refs, int mirror_mode);
+
+#endif