summaryrefslogtreecommitdiff
path: root/transport.h
blob: c49a8edc537cf9d829aa4b8108737529acf61807 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
#ifndef TRANSPORT_H
#define TRANSPORT_H

#include "cache.h"
#include "run-command.h"
#include "remote.h"

struct string_list;

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 deepen_relative : 1;
	unsigned from_promisor : 1;
	unsigned no_dependents : 1;
	int depth;
	const char *deepen_since;
	const struct string_list *deepen_not;
	const char *uploadpack;
	const char *receivepack;
	struct push_cas_option *cas;
};

enum transport_family {
	TRANSPORT_FAMILY_ALL = 0,
	TRANSPORT_FAMILY_IPV4,
	TRANSPORT_FAMILY_IPV6
};

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;

	/*
	 * 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;

	/*
	 * 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;

	/**
	 * 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_oid is different from old_oid, tell the
	 * remote side to update each ref in the list from old_oid to
	 * peer_ref->new_oid.
	 *
	 * 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_oid 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 further
	 * 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;

	enum transport_family family;
};

#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)

extern 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"

/* 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"

/*
 * Indicate that only the objects wanted need to be fetched, not their
 * dependents
 */
#define TRANS_OPT_NO_DEPENDENTS "no-dependents"

/**
 * 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

int transport_push(struct transport *connection,
		   int refspec_nr, const char **refspec, int flags,
		   unsigned int * reject_reasons);

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, unsigned int *reject_reasons);

typedef void alternate_ref_fn(const char *refname, const struct object_id *oid, void *);
extern void for_each_alternate_ref(alternate_ref_fn, void *);
#endif