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1 #ifndef TRANSPORT_H
2 #define TRANSPORT_H
3
4 #include "cache.h"
5 #include "run-command.h"
6 #include "remote.h"
7 #include "list-objects-filter-options.h"
8 #include "string-list.h"
9
10 struct git_transport_options {
11 unsigned thin : 1;
12 unsigned keep : 1;
13 unsigned followtags : 1;
14 unsigned check_self_contained_and_connected : 1;
15 unsigned self_contained_and_connected : 1;
16 unsigned update_shallow : 1;
17 unsigned reject_shallow : 1;
18 unsigned deepen_relative : 1;
19
20 /* see documentation of corresponding flag in fetch-pack.h */
21 unsigned from_promisor : 1;
22
23 /*
24 * If this transport supports connect or stateless-connect,
25 * the corresponding field in struct fetch_pack_args is copied
26 * here after fetching.
27 *
28 * See the definition of connectivity_checked in struct
29 * fetch_pack_args for more information.
30 */
31 unsigned connectivity_checked:1;
32
33 int depth;
34 const char *deepen_since;
35 const struct string_list *deepen_not;
36 const char *uploadpack;
37 const char *receivepack;
38 struct push_cas_option *cas;
39 struct list_objects_filter_options filter_options;
40
41 /*
42 * This is only used during fetch. See the documentation of
43 * negotiation_tips in struct fetch_pack_args.
44 *
45 * This field is only supported by transports that support connect or
46 * stateless_connect. Set this field directly instead of using
47 * transport_set_option().
48 */
49 struct oid_array *negotiation_tips;
50
51 /*
52 * If allocated, whenever transport_fetch_refs() is called, add known
53 * common commits to this oidset instead of fetching any packfiles.
54 */
55 struct oidset *acked_commits;
56 };
57
58 enum transport_family {
59 TRANSPORT_FAMILY_ALL = 0,
60 TRANSPORT_FAMILY_IPV4,
61 TRANSPORT_FAMILY_IPV6
62 };
63
64 struct transport {
65 const struct transport_vtable *vtable;
66
67 struct remote *remote;
68 const char *url;
69 void *data;
70 const struct ref *remote_refs;
71
72 /**
73 * Indicates whether we already called get_refs_list(); set by
74 * transport.c::transport_get_remote_refs().
75 */
76 unsigned got_remote_refs : 1;
77
78 /*
79 * Transports that call take-over destroys the data specific to
80 * the transport type while doing so, and cannot be reused.
81 */
82 unsigned cannot_reuse : 1;
83
84 /*
85 * A hint from caller that it will be performing a clone, not
86 * normal fetch. IOW the repository is guaranteed empty.
87 */
88 unsigned cloning : 1;
89
90 /*
91 * Indicates that the transport is connected via a half-duplex
92 * connection and should operate in stateless-rpc mode.
93 */
94 unsigned stateless_rpc : 1;
95
96 /*
97 * These strings will be passed to the {pre, post}-receive hook,
98 * on the remote side, if both sides support the push options capability.
99 */
100 const struct string_list *push_options;
101
102 /*
103 * These strings will be passed to the remote side on each command
104 * request, if both sides support the server-option capability.
105 */
106 const struct string_list *server_options;
107
108 struct string_list pack_lockfiles;
109
110 signed verbose : 3;
111 /**
112 * Transports should not set this directly, and should use this
113 * value without having to check isatty(2), -q/--quiet
114 * (transport->verbose < 0), etc. - checking has already been done
115 * in transport_set_verbosity().
116 **/
117 unsigned progress : 1;
118 /*
119 * If transport is at least potentially smart, this points to
120 * git_transport_options structure to use in case transport
121 * actually turns out to be smart.
122 */
123 struct git_transport_options *smart_options;
124
125 enum transport_family family;
126
127 const struct git_hash_algo *hash_algo;
128 };
129
130 #define TRANSPORT_PUSH_ALL (1<<0)
131 #define TRANSPORT_PUSH_FORCE (1<<1)
132 #define TRANSPORT_PUSH_DRY_RUN (1<<2)
133 #define TRANSPORT_PUSH_MIRROR (1<<3)
134 #define TRANSPORT_PUSH_PORCELAIN (1<<4)
135 #define TRANSPORT_PUSH_SET_UPSTREAM (1<<5)
136 #define TRANSPORT_RECURSE_SUBMODULES_CHECK (1<<6)
137 #define TRANSPORT_PUSH_PRUNE (1<<7)
138 #define TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND (1<<8)
139 #define TRANSPORT_PUSH_NO_HOOK (1<<9)
140 #define TRANSPORT_PUSH_FOLLOW_TAGS (1<<10)
141 #define TRANSPORT_PUSH_CERT_ALWAYS (1<<11)
142 #define TRANSPORT_PUSH_CERT_IF_ASKED (1<<12)
143 #define TRANSPORT_PUSH_ATOMIC (1<<13)
144 #define TRANSPORT_PUSH_OPTIONS (1<<14)
145 #define TRANSPORT_RECURSE_SUBMODULES_ONLY (1<<15)
146 #define TRANSPORT_PUSH_FORCE_IF_INCLUDES (1<<16)
147
148 int transport_summary_width(const struct ref *refs);
149
150 /* Returns a transport suitable for the url */
151 struct transport *transport_get(struct remote *, const char *);
152
153 /*
154 * Check whether a transport is allowed by the environment.
155 *
156 * Type should generally be the URL scheme, as described in
157 * Documentation/git.txt
158 *
159 * from_user specifies if the transport was given by the user. If unknown pass
160 * a -1 to read from the environment to determine if the transport was given by
161 * the user.
162 *
163 */
164 int is_transport_allowed(const char *type, int from_user);
165
166 /*
167 * Check whether a transport is allowed by the environment,
168 * and die otherwise.
169 */
170 void transport_check_allowed(const char *type);
171
172 /* Transport options which apply to git:// and scp-style URLs */
173
174 /* The program to use on the remote side to send a pack */
175 #define TRANS_OPT_UPLOADPACK "uploadpack"
176
177 /* The program to use on the remote side to receive a pack */
178 #define TRANS_OPT_RECEIVEPACK "receivepack"
179
180 /* Transfer the data as a thin pack if not null */
181 #define TRANS_OPT_THIN "thin"
182
183 /* Check the current value of the remote ref */
184 #define TRANS_OPT_CAS "cas"
185
186 /* Keep the pack that was transferred if not null */
187 #define TRANS_OPT_KEEP "keep"
188
189 /* Limit the depth of the fetch if not null */
190 #define TRANS_OPT_DEPTH "depth"
191
192 /* Limit the depth of the fetch based on time if not null */
193 #define TRANS_OPT_DEEPEN_SINCE "deepen-since"
194
195 /* Limit the depth of the fetch based on revs if not null */
196 #define TRANS_OPT_DEEPEN_NOT "deepen-not"
197
198 /* Limit the deepen of the fetch if not null */
199 #define TRANS_OPT_DEEPEN_RELATIVE "deepen-relative"
200
201 /* Aggressively fetch annotated tags if possible */
202 #define TRANS_OPT_FOLLOWTAGS "followtags"
203
204 /* Reject shallow repo transport */
205 #define TRANS_OPT_REJECT_SHALLOW "rejectshallow"
206
207 /* Accept refs that may update .git/shallow without --depth */
208 #define TRANS_OPT_UPDATE_SHALLOW "updateshallow"
209
210 /* Send push certificates */
211 #define TRANS_OPT_PUSH_CERT "pushcert"
212
213 /* Indicate that these objects are being fetched by a promisor */
214 #define TRANS_OPT_FROM_PROMISOR "from-promisor"
215
216 /* Filter objects for partial clone and fetch */
217 #define TRANS_OPT_LIST_OBJECTS_FILTER "filter"
218
219 /* Request atomic (all-or-nothing) updates when pushing */
220 #define TRANS_OPT_ATOMIC "atomic"
221
222 /* Require remote changes to be integrated locally. */
223 #define TRANS_OPT_FORCE_IF_INCLUDES "force-if-includes"
224
225 /**
226 * Returns 0 if the option was used, non-zero otherwise. Prints a
227 * message to stderr if the option is not used.
228 **/
229 int transport_set_option(struct transport *transport, const char *name,
230 const char *value);
231 void transport_set_verbosity(struct transport *transport, int verbosity,
232 int force_progress);
233
234 #define REJECT_NON_FF_HEAD 0x01
235 #define REJECT_NON_FF_OTHER 0x02
236 #define REJECT_ALREADY_EXISTS 0x04
237 #define REJECT_FETCH_FIRST 0x08
238 #define REJECT_NEEDS_FORCE 0x10
239 #define REJECT_REF_NEEDS_UPDATE 0x20
240
241 int transport_push(struct repository *repo,
242 struct transport *connection,
243 struct refspec *rs, int flags,
244 unsigned int * reject_reasons);
245
246 struct transport_ls_refs_options {
247 /*
248 * Optionally, a list of ref prefixes can be provided which can be sent
249 * to the server (when communicating using protocol v2) to enable it to
250 * limit the ref advertisement. Since ref filtering is done on the
251 * server's end (and only when using protocol v2),
252 * transport_get_remote_refs() could return refs which don't match the
253 * provided ref_prefixes.
254 */
255 struct strvec ref_prefixes;
256
257 /*
258 * If unborn_head_target is not NULL, and the remote reports HEAD as
259 * pointing to an unborn branch, transport_get_remote_refs() stores the
260 * unborn branch in unborn_head_target. It should be freed by the
261 * caller.
262 */
263 char *unborn_head_target;
264 };
265 #define TRANSPORT_LS_REFS_OPTIONS_INIT { STRVEC_INIT }
266
267 /*
268 * Retrieve refs from a remote.
269 */
270 const struct ref *transport_get_remote_refs(struct transport *transport,
271 struct transport_ls_refs_options *transport_options);
272
273 /*
274 * Fetch the hash algorithm used by a remote.
275 *
276 * This can only be called after fetching the remote refs.
277 */
278 const struct git_hash_algo *transport_get_hash_algo(struct transport *transport);
279 int transport_fetch_refs(struct transport *transport, struct ref *refs);
280 void transport_unlock_pack(struct transport *transport);
281 int transport_disconnect(struct transport *transport);
282 char *transport_anonymize_url(const char *url);
283 void transport_take_over(struct transport *transport,
284 struct child_process *child);
285
286 int transport_connect(struct transport *transport, const char *name,
287 const char *exec, int fd[2]);
288
289 /* Transport methods defined outside transport.c */
290 int transport_helper_init(struct transport *transport, const char *name);
291 int bidirectional_transfer_loop(int input, int output);
292
293 /* common methods used by transport.c and builtin/send-pack.c */
294 void transport_update_tracking_ref(struct remote *remote, struct ref *ref, int verbose);
295
296 int transport_refs_pushed(struct ref *ref);
297
298 void transport_print_push_status(const char *dest, struct ref *refs,
299 int verbose, int porcelain, unsigned int *reject_reasons);
300
301 /* common method used by transport-helper.c and send-pack.c */
302 void reject_atomic_push(struct ref *refs, int mirror_mode);
303
304 #endif