10 #include "transport.h"
11 #include "run-command.h"
12 #include "parse-options.h"
14 static const char * const builtin_fetch_usage
[] = {
15 "git-fetch [options] [<repository> <refspec>...]",
25 static int append
, force
, keep
, update_head_ok
, verbose
, quiet
;
26 static int tags
= TAGS_DEFAULT
;
27 static const char *depth
;
28 static const char *upload_pack
;
29 static struct strbuf default_rla
= STRBUF_INIT
;
30 static struct transport
*transport
;
32 static struct option builtin_fetch_options
[] = {
34 OPT__VERBOSE(&verbose
),
35 OPT_BOOLEAN('a', "append", &append
,
36 "append to .git/FETCH_HEAD instead of overwriting"),
37 OPT_STRING(0, "upload-pack", &upload_pack
, "PATH",
38 "path to upload pack on remote end"),
39 OPT_BOOLEAN('f', "force", &force
,
40 "force overwrite of local branch"),
41 OPT_SET_INT('t', "tags", &tags
,
42 "fetch all tags and associated objects", TAGS_SET
),
43 OPT_BOOLEAN('k', "keep", &keep
, "keep downloaded pack"),
44 OPT_BOOLEAN('u', "update-head-ok", &update_head_ok
,
45 "allow updating of HEAD ref"),
46 OPT_STRING(0, "depth", &depth
, "DEPTH",
47 "deepen history of shallow clone"),
51 static void unlock_pack(void)
54 transport_unlock_pack(transport
);
57 static void unlock_pack_on_signal(int signo
)
60 signal(SIGINT
, SIG_DFL
);
64 static void add_merge_config(struct ref
**head
,
65 const struct ref
*remote_refs
,
66 struct branch
*branch
,
71 for (i
= 0; i
< branch
->merge_nr
; i
++) {
72 struct ref
*rm
, **old_tail
= *tail
;
73 struct refspec refspec
;
75 for (rm
= *head
; rm
; rm
= rm
->next
) {
76 if (branch_merge_matches(branch
, i
, rm
->name
)) {
85 * Not fetched to a tracking branch? We need to fetch
86 * it anyway to allow this branch's "branch.$name.merge"
87 * to be honored by git-pull, but we do not have to
88 * fail if branch.$name.merge is misconfigured to point
89 * at a nonexisting branch. If we were indeed called by
90 * git-pull, it will notice the misconfiguration because
91 * there is no entry in the resulting FETCH_HEAD marked
94 refspec
.src
= branch
->merge
[i
]->src
;
98 get_fetch_map(remote_refs
, &refspec
, tail
, 1);
99 for (rm
= *old_tail
; rm
; rm
= rm
->next
)
104 static struct ref
*get_ref_map(struct transport
*transport
,
105 struct refspec
*refs
, int ref_count
, int tags
,
110 struct ref
*ref_map
= NULL
;
111 struct ref
**tail
= &ref_map
;
113 const struct ref
*remote_refs
= transport_get_remote_refs(transport
);
115 if (ref_count
|| tags
== TAGS_SET
) {
116 for (i
= 0; i
< ref_count
; i
++) {
117 get_fetch_map(remote_refs
, &refs
[i
], &tail
, 0);
118 if (refs
[i
].dst
&& refs
[i
].dst
[0])
121 /* Merge everything on the command line, but not --tags */
122 for (rm
= ref_map
; rm
; rm
= rm
->next
)
124 if (tags
== TAGS_SET
) {
125 struct refspec refspec
;
126 refspec
.src
= "refs/tags/";
127 refspec
.dst
= "refs/tags/";
130 get_fetch_map(remote_refs
, &refspec
, &tail
, 0);
133 /* Use the defaults */
134 struct remote
*remote
= transport
->remote
;
135 struct branch
*branch
= branch_get(NULL
);
136 int has_merge
= branch_has_merge_config(branch
);
137 if (remote
&& (remote
->fetch_refspec_nr
|| has_merge
)) {
138 for (i
= 0; i
< remote
->fetch_refspec_nr
; i
++) {
139 get_fetch_map(remote_refs
, &remote
->fetch
[i
], &tail
, 0);
140 if (remote
->fetch
[i
].dst
&&
141 remote
->fetch
[i
].dst
[0])
143 if (!i
&& !has_merge
&& ref_map
&&
144 !remote
->fetch
[0].pattern
)
148 * if the remote we're fetching from is the same
149 * as given in branch.<name>.remote, we add the
150 * ref given in branch.<name>.merge, too.
153 !strcmp(branch
->remote_name
, remote
->name
))
154 add_merge_config(&ref_map
, remote_refs
, branch
, &tail
);
156 ref_map
= get_remote_ref(remote_refs
, "HEAD");
158 die("Couldn't find remote ref HEAD");
160 tail
= &ref_map
->next
;
163 ref_remove_duplicates(ref_map
);
168 static int s_update_ref(const char *action
,
173 char *rla
= getenv("GIT_REFLOG_ACTION");
174 static struct ref_lock
*lock
;
177 rla
= default_rla
.buf
;
178 snprintf(msg
, sizeof(msg
), "%s: %s", rla
, action
);
179 lock
= lock_any_ref_for_update(ref
->name
,
180 check_old
? ref
->old_sha1
: NULL
, 0);
183 if (write_ref_sha1(lock
, ref
->new_sha1
, msg
) < 0)
188 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
189 #define REFCOL_WIDTH 10
191 static int update_local_ref(struct ref
*ref
,
196 struct commit
*current
= NULL
, *updated
;
197 enum object_type type
;
198 struct branch
*current_branch
= branch_get(NULL
);
199 const char *pretty_ref
= ref
->name
+ (
200 !prefixcmp(ref
->name
, "refs/heads/") ? 11 :
201 !prefixcmp(ref
->name
, "refs/tags/") ? 10 :
202 !prefixcmp(ref
->name
, "refs/remotes/") ? 13 :
206 type
= sha1_object_info(ref
->new_sha1
, NULL
);
208 die("object %s not found", sha1_to_hex(ref
->new_sha1
));
213 sprintf(display
, "* branch %s -> FETCH_HEAD", remote
);
217 if (!hashcmp(ref
->old_sha1
, ref
->new_sha1
)) {
219 sprintf(display
, "= %-*s %-*s -> %s", SUMMARY_WIDTH
,
220 "[up to date]", REFCOL_WIDTH
, remote
,
225 if (current_branch
&&
226 !strcmp(ref
->name
, current_branch
->name
) &&
227 !(update_head_ok
|| is_bare_repository()) &&
228 !is_null_sha1(ref
->old_sha1
)) {
230 * If this is the head, and it's not okay to update
231 * the head, and the old value of the head isn't empty...
233 sprintf(display
, "! %-*s %-*s -> %s (can't fetch in current branch)",
234 SUMMARY_WIDTH
, "[rejected]", REFCOL_WIDTH
, remote
,
239 if (!is_null_sha1(ref
->old_sha1
) &&
240 !prefixcmp(ref
->name
, "refs/tags/")) {
241 sprintf(display
, "- %-*s %-*s -> %s",
242 SUMMARY_WIDTH
, "[tag update]", REFCOL_WIDTH
, remote
,
244 return s_update_ref("updating tag", ref
, 0);
247 current
= lookup_commit_reference_gently(ref
->old_sha1
, 1);
248 updated
= lookup_commit_reference_gently(ref
->new_sha1
, 1);
249 if (!current
|| !updated
) {
252 if (!strncmp(ref
->name
, "refs/tags/", 10)) {
257 msg
= "storing head";
258 what
= "[new branch]";
261 sprintf(display
, "* %-*s %-*s -> %s", SUMMARY_WIDTH
, what
,
262 REFCOL_WIDTH
, remote
, pretty_ref
);
263 return s_update_ref(msg
, ref
, 0);
266 if (in_merge_bases(current
, &updated
, 1)) {
268 strcpy(quickref
, find_unique_abbrev(current
->object
.sha1
, DEFAULT_ABBREV
));
269 strcat(quickref
, "..");
270 strcat(quickref
, find_unique_abbrev(ref
->new_sha1
, DEFAULT_ABBREV
));
271 sprintf(display
, " %-*s %-*s -> %s", SUMMARY_WIDTH
, quickref
,
272 REFCOL_WIDTH
, remote
, pretty_ref
);
273 return s_update_ref("fast forward", ref
, 1);
274 } else if (force
|| ref
->force
) {
276 strcpy(quickref
, find_unique_abbrev(current
->object
.sha1
, DEFAULT_ABBREV
));
277 strcat(quickref
, "...");
278 strcat(quickref
, find_unique_abbrev(ref
->new_sha1
, DEFAULT_ABBREV
));
279 sprintf(display
, "+ %-*s %-*s -> %s (forced update)",
280 SUMMARY_WIDTH
, quickref
, REFCOL_WIDTH
, remote
, pretty_ref
);
281 return s_update_ref("forced-update", ref
, 1);
283 sprintf(display
, "! %-*s %-*s -> %s (non fast forward)",
284 SUMMARY_WIDTH
, "[rejected]", REFCOL_WIDTH
, remote
,
290 static int store_updated_refs(const char *url
, struct ref
*ref_map
)
293 struct commit
*commit
;
294 int url_len
, i
, note_len
, shown_url
= 0;
296 const char *what
, *kind
;
298 char *filename
= git_path("FETCH_HEAD");
300 fp
= fopen(filename
, "a");
302 return error("cannot open %s: %s\n", filename
, strerror(errno
));
303 for (rm
= ref_map
; rm
; rm
= rm
->next
) {
304 struct ref
*ref
= NULL
;
307 ref
= xcalloc(1, sizeof(*ref
) + strlen(rm
->peer_ref
->name
) + 1);
308 strcpy(ref
->name
, rm
->peer_ref
->name
);
309 hashcpy(ref
->old_sha1
, rm
->peer_ref
->old_sha1
);
310 hashcpy(ref
->new_sha1
, rm
->old_sha1
);
311 ref
->force
= rm
->peer_ref
->force
;
314 commit
= lookup_commit_reference_gently(rm
->old_sha1
, 1);
318 if (!strcmp(rm
->name
, "HEAD")) {
322 else if (!prefixcmp(rm
->name
, "refs/heads/")) {
324 what
= rm
->name
+ 11;
326 else if (!prefixcmp(rm
->name
, "refs/tags/")) {
328 what
= rm
->name
+ 10;
330 else if (!prefixcmp(rm
->name
, "refs/remotes/")) {
331 kind
= "remote branch";
332 what
= rm
->name
+ 13;
339 url_len
= strlen(url
);
340 for (i
= url_len
- 1; url
[i
] == '/' && 0 <= i
; i
--)
343 if (4 < i
&& !strncmp(".git", url
+ i
- 3, 4))
349 note_len
+= sprintf(note
+ note_len
, "%s ",
351 note_len
+= sprintf(note
+ note_len
, "'%s' of ", what
);
353 note_len
+= sprintf(note
+ note_len
, "%.*s", url_len
, url
);
354 fprintf(fp
, "%s\t%s\t%s\n",
355 sha1_to_hex(commit
? commit
->object
.sha1
:
357 rm
->merge
? "" : "not-for-merge",
361 update_local_ref(ref
, what
, verbose
, note
);
364 fprintf(stderr
, "From %.*s\n",
368 fprintf(stderr
, " %s\n", note
);
377 * We would want to bypass the object transfer altogether if
378 * everything we are going to fetch already exists and connected
381 * The refs we are going to fetch are in to_fetch (nr_heads in
384 * $ git-rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
386 * does not error out, that means everything reachable from the
387 * refs we are going to fetch exists and is connected to some of
390 static int quickfetch(struct ref
*ref_map
)
392 struct child_process revlist
;
398 * If we are deepening a shallow clone we already have these
399 * objects reachable. Running rev-list here will return with
400 * a good (0) exit status and we'll bypass the fetch that we
401 * really need to perform. Claiming failure now will ensure
402 * we perform the network exchange to deepen our history.
407 for (i
= 0, ref
= ref_map
; ref
; ref
= ref
->next
)
412 argv
= xmalloc(sizeof(*argv
) * (i
+ 6));
414 argv
[i
++] = xstrdup("rev-list");
415 argv
[i
++] = xstrdup("--quiet");
416 argv
[i
++] = xstrdup("--objects");
417 for (ref
= ref_map
; ref
; ref
= ref
->next
)
418 argv
[i
++] = xstrdup(sha1_to_hex(ref
->old_sha1
));
419 argv
[i
++] = xstrdup("--not");
420 argv
[i
++] = xstrdup("--all");
423 memset(&revlist
, 0, sizeof(revlist
));
424 revlist
.argv
= (const char**)argv
;
426 revlist
.no_stdin
= 1;
427 revlist
.no_stdout
= 1;
428 revlist
.no_stderr
= 1;
429 err
= run_command(&revlist
);
431 for (i
= 0; argv
[i
]; i
++)
437 static int fetch_refs(struct transport
*transport
, struct ref
*ref_map
)
439 int ret
= quickfetch(ref_map
);
441 ret
= transport_fetch_refs(transport
, ref_map
);
443 ret
|= store_updated_refs(transport
->url
, ref_map
);
444 transport_unlock_pack(transport
);
448 static int add_existing(const char *refname
, const unsigned char *sha1
,
449 int flag
, void *cbdata
)
451 struct path_list
*list
= (struct path_list
*)cbdata
;
452 path_list_insert(refname
, list
);
456 static void find_non_local_tags(struct transport
*transport
,
460 struct path_list existing_refs
= { NULL
, 0, 0, 0 };
461 struct path_list new_refs
= { NULL
, 0, 0, 1 };
464 const unsigned char *ref_sha1
;
465 const struct ref
*tag_ref
;
466 struct ref
*rm
= NULL
;
467 const struct ref
*ref
;
469 for_each_ref(add_existing
, &existing_refs
);
470 for (ref
= transport_get_remote_refs(transport
); ref
; ref
= ref
->next
) {
471 if (prefixcmp(ref
->name
, "refs/tags"))
474 ref_name
= xstrdup(ref
->name
);
475 ref_name_len
= strlen(ref_name
);
476 ref_sha1
= ref
->old_sha1
;
478 if (!strcmp(ref_name
+ ref_name_len
- 3, "^{}")) {
479 ref_name
[ref_name_len
- 3] = 0;
480 tag_ref
= transport_get_remote_refs(transport
);
482 if (!strcmp(tag_ref
->name
, ref_name
)) {
483 ref_sha1
= tag_ref
->old_sha1
;
486 tag_ref
= tag_ref
->next
;
490 if (!path_list_has_path(&existing_refs
, ref_name
) &&
491 !path_list_has_path(&new_refs
, ref_name
) &&
492 has_sha1_file(ref
->old_sha1
)) {
493 path_list_insert(ref_name
, &new_refs
);
495 rm
= alloc_ref(strlen(ref_name
) + 1);
496 strcpy(rm
->name
, ref_name
);
497 rm
->peer_ref
= alloc_ref(strlen(ref_name
) + 1);
498 strcpy(rm
->peer_ref
->name
, ref_name
);
499 hashcpy(rm
->old_sha1
, ref_sha1
);
506 path_list_clear(&existing_refs
, 0);
507 path_list_clear(&new_refs
, 0);
510 static int do_fetch(struct transport
*transport
,
511 struct refspec
*refs
, int ref_count
)
515 int autotags
= (transport
->remote
->fetch_tags
== 1);
516 if (transport
->remote
->fetch_tags
== 2 && tags
!= TAGS_UNSET
)
518 if (transport
->remote
->fetch_tags
== -1)
521 if (!transport
->get_refs_list
|| !transport
->fetch
)
522 die("Don't know how to fetch from %s", transport
->url
);
524 /* if not appending, truncate FETCH_HEAD */
526 char *filename
= git_path("FETCH_HEAD");
527 FILE *fp
= fopen(filename
, "w");
529 return error("cannot open %s: %s\n", filename
, strerror(errno
));
533 ref_map
= get_ref_map(transport
, refs
, ref_count
, tags
, &autotags
);
535 for (rm
= ref_map
; rm
; rm
= rm
->next
) {
537 read_ref(rm
->peer_ref
->name
, rm
->peer_ref
->old_sha1
);
540 if (fetch_refs(transport
, ref_map
)) {
546 /* if neither --no-tags nor --tags was specified, do automated tag
548 if (tags
== TAGS_DEFAULT
&& autotags
) {
549 struct ref
**tail
= &ref_map
;
551 find_non_local_tags(transport
, &ref_map
, &tail
);
553 transport_set_option(transport
, TRANS_OPT_DEPTH
, "0");
554 fetch_refs(transport
, ref_map
);
559 transport_disconnect(transport
);
564 static void set_option(const char *name
, const char *value
)
566 int r
= transport_set_option(transport
, name
, value
);
568 die("Option \"%s\" value \"%s\" is not valid for %s\n",
569 name
, value
, transport
->url
);
571 warning("Option \"%s\" is ignored for %s\n",
572 name
, transport
->url
);
575 int cmd_fetch(int argc
, const char **argv
, const char *prefix
)
577 struct remote
*remote
;
579 static const char **refs
= NULL
;
582 /* Record the command line for the reflog */
583 strbuf_addstr(&default_rla
, "fetch");
584 for (i
= 1; i
< argc
; i
++)
585 strbuf_addf(&default_rla
, " %s", argv
[i
]);
587 argc
= parse_options(argc
, argv
,
588 builtin_fetch_options
, builtin_fetch_usage
, 0);
591 remote
= remote_get(NULL
);
593 remote
= remote_get(argv
[0]);
595 transport
= transport_get(remote
, remote
->url
[0]);
597 transport
->verbose
= 1;
599 transport
->verbose
= -1;
601 set_option(TRANS_OPT_UPLOADPACK
, upload_pack
);
603 set_option(TRANS_OPT_KEEP
, "yes");
605 set_option(TRANS_OPT_DEPTH
, depth
);
608 die("Where do you want to fetch from today?");
612 refs
= xcalloc(argc
+ 1, sizeof(const char *));
613 for (i
= 1; i
< argc
; i
++) {
614 if (!strcmp(argv
[i
], "tag")) {
617 ref
= xmalloc(strlen(argv
[i
]) * 2 + 22);
618 strcpy(ref
, "refs/tags/");
619 strcat(ref
, argv
[i
]);
620 strcat(ref
, ":refs/tags/");
621 strcat(ref
, argv
[i
]);
630 signal(SIGINT
, unlock_pack_on_signal
);
632 return do_fetch(transport
, parse_ref_spec(ref_nr
, refs
), ref_nr
);