Merge branch 'maint' into tj/imap-send-remove-unused

* maint: (18123 commits)
  documentation fix: git difftool uses diff tools, not merge tools.
  Git 1.7.7.4
  Makefile: add missing header file dependencies
  notes merge: eliminate OUTPUT macro
  mailmap: xcalloc mailmap_info
  name-rev --all: do not even attempt to describe non-commit object
  Git 1.7.7.3
  docs: Update install-doc-quick
  docs: don't mention --quiet or --exit-code in git-log(1)
  Git 1.7.7.2
  t7511: avoid use of reserved filename on Windows.
  clone: Quote user supplied path in a single quote pair
  read-cache.c: fix index memory allocation
  make the sample pre-commit hook script reject names with newlines, too
  Reindent closing bracket using tab instead of spaces
  Git 1.7.7.1
  RelNotes/1.7.7.1: setgid bit patch is about fixing "git init" via Makefile setting
  gitweb: fix regression when filtering out forks
  Almost ready for 1.7.7.1
  pack-objects: don't traverse objects unnecessarily
  ...

Conflicts:
	imap-send.c

1 files changed, 173 insertions, 0 deletions

diff --git a/transport.h b/transport.h
new file mode 100644
index 000000000..059b3303e
--- /dev/null
+++ b/transport.h
@@ -0,0 +1,173 @@
+#ifndef TRANSPORT_H
+#define TRANSPORT_H
+
+#include "cache.h"
+#include "remote.h"
+
+struct git_transport_options {
+	unsigned thin : 1;
+	unsigned keep : 1;
+	unsigned followtags : 1;
+	int depth;
+	const char *uploadpack;
+	const char *receivepack;
+};
+
+struct transport {
+	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;
+
+	/**
+	 * 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);
+
+	/**
+	 * Returns a list of the remote side's refs. In order to allow
+	 * the transport to try to share connections, for_push is a
+	 * hint as to whether the ultimate operation is a push or a fetch.
+	 *
+	 * If the transport is able to determine the remote hash for
+	 * the ref without a huge amount of effort, it should store it
+	 * in the ref's old_sha1 field; otherwise it should be all 0.
+	 **/
+	struct ref *(*get_refs_list)(struct transport *transport, int for_push);
+
+	/**
+	 * Fetch the objects for the given refs. Note that this gets
+	 * an array, and should ignore the list structure.
+	 *
+	 * If the transport did not get hashes for refs in
+	 * get_refs_list(), it should set the old_sha1 fields in the
+	 * provided refs now.
+	 **/
+	int (*fetch)(struct transport *transport, int refs_nr, struct ref **refs);
+
+	/**
+	 * Push the objects and refs. Send the necessary objects, and
+	 * then, for any refs where peer_ref is set and
+	 * peer_ref->new_sha1 is different from old_sha1, tell the
+	 * remote side to update each ref in the list from old_sha1 to
+	 * peer_ref->new_sha1.
+	 *
+	 * Where possible, set the status for each ref appropriately.
+	 *
+	 * The transport must modify new_sha1 in the ref to the new
+	 * value if the remote accepted the change. Note that this
+	 * could be a different value from peer_ref->new_sha1 if the
+	 * process involved generating new commits.
+	 **/
+	int (*push_refs)(struct transport *transport, struct ref *refs, int flags);
+	int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
+	int (*connect)(struct transport *connection, const char *name,
+		       const char *executable, int fd[2]);
+
+	/** get_refs_list(), fetch(), and push_refs() can keep
+	 * resources (such as a connection) reserved for futher
+	 * use. disconnect() releases these resources.
+	 **/
+	int (*disconnect)(struct transport *connection);
+	char *pack_lockfile;
+	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;
+};
+
+#define TRANSPORT_PUSH_ALL 1
+#define TRANSPORT_PUSH_FORCE 2
+#define TRANSPORT_PUSH_DRY_RUN 4
+#define TRANSPORT_PUSH_MIRROR 8
+#define TRANSPORT_PUSH_PORCELAIN 16
+#define TRANSPORT_PUSH_SET_UPSTREAM 32
+#define TRANSPORT_RECURSE_SUBMODULES_CHECK 64
+
+#define TRANSPORT_SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
+
+/* 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"
+
+/* Limit the depth of the fetch if not null */
+#define TRANS_OPT_DEPTH "depth"
+
+/* Aggressively fetch annotated tags if possible */
+#define TRANS_OPT_FOLLOWTAGS "followtags"
+
+/**
+ * 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);
+
+int transport_push(struct transport *connection,
+		   int refspec_nr, const char **refspec, int flags,
+		   int * nonfastforward);
+
+const 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);
+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_verify_remote_names(int nr_heads, const char **heads);
+
+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, int *nonfastforward);
+
+typedef void alternate_ref_fn(const struct ref *, void *);
+extern void for_each_alternate_ref(alternate_ref_fn, void *);
+
+#endif