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_SET_INT('n', NULL
, &tags
,
44 "do not fetch all tags (--no-tags)", TAGS_UNSET
),
45 OPT_BOOLEAN('k', "keep", &keep
, "keep downloaded pack"),
46 OPT_BOOLEAN('u', "update-head-ok", &update_head_ok
,
47 "allow updating of HEAD ref"),
48 OPT_STRING(0, "depth", &depth
, "DEPTH",
49 "deepen history of shallow clone"),
53 static void unlock_pack(void)
56 transport_unlock_pack(transport
);
59 static void unlock_pack_on_signal(int signo
)
62 signal(SIGINT
, SIG_DFL
);
66 static void add_merge_config(struct ref
**head
,
67 const struct ref
*remote_refs
,
68 struct branch
*branch
,
73 for (i
= 0; i
< branch
->merge_nr
; i
++) {
74 struct ref
*rm
, **old_tail
= *tail
;
75 struct refspec refspec
;
77 for (rm
= *head
; rm
; rm
= rm
->next
) {
78 if (branch_merge_matches(branch
, i
, rm
->name
)) {
87 * Not fetched to a tracking branch? We need to fetch
88 * it anyway to allow this branch's "branch.$name.merge"
89 * to be honored by git-pull, but we do not have to
90 * fail if branch.$name.merge is misconfigured to point
91 * at a nonexisting branch. If we were indeed called by
92 * git-pull, it will notice the misconfiguration because
93 * there is no entry in the resulting FETCH_HEAD marked
96 refspec
.src
= branch
->merge
[i
]->src
;
100 get_fetch_map(remote_refs
, &refspec
, tail
, 1);
101 for (rm
= *old_tail
; rm
; rm
= rm
->next
)
106 static void find_non_local_tags(struct transport
*transport
,
110 static struct ref
*get_ref_map(struct transport
*transport
,
111 struct refspec
*refs
, int ref_count
, int tags
,
116 struct ref
*ref_map
= NULL
;
117 struct ref
**tail
= &ref_map
;
119 const struct ref
*remote_refs
= transport_get_remote_refs(transport
);
121 if (ref_count
|| tags
== TAGS_SET
) {
122 for (i
= 0; i
< ref_count
; i
++) {
123 get_fetch_map(remote_refs
, &refs
[i
], &tail
, 0);
124 if (refs
[i
].dst
&& refs
[i
].dst
[0])
127 /* Merge everything on the command line, but not --tags */
128 for (rm
= ref_map
; rm
; rm
= rm
->next
)
130 if (tags
== TAGS_SET
) {
131 struct refspec refspec
;
132 refspec
.src
= "refs/tags/";
133 refspec
.dst
= "refs/tags/";
136 get_fetch_map(remote_refs
, &refspec
, &tail
, 0);
139 /* Use the defaults */
140 struct remote
*remote
= transport
->remote
;
141 struct branch
*branch
= branch_get(NULL
);
142 int has_merge
= branch_has_merge_config(branch
);
143 if (remote
&& (remote
->fetch_refspec_nr
|| has_merge
)) {
144 for (i
= 0; i
< remote
->fetch_refspec_nr
; i
++) {
145 get_fetch_map(remote_refs
, &remote
->fetch
[i
], &tail
, 0);
146 if (remote
->fetch
[i
].dst
&&
147 remote
->fetch
[i
].dst
[0])
149 if (!i
&& !has_merge
&& ref_map
&&
150 !remote
->fetch
[0].pattern
)
154 * if the remote we're fetching from is the same
155 * as given in branch.<name>.remote, we add the
156 * ref given in branch.<name>.merge, too.
159 !strcmp(branch
->remote_name
, remote
->name
))
160 add_merge_config(&ref_map
, remote_refs
, branch
, &tail
);
162 ref_map
= get_remote_ref(remote_refs
, "HEAD");
164 die("Couldn't find remote ref HEAD");
166 tail
= &ref_map
->next
;
169 if (tags
== TAGS_DEFAULT
&& *autotags
)
170 find_non_local_tags(transport
, &ref_map
, &tail
);
171 ref_remove_duplicates(ref_map
);
176 static int s_update_ref(const char *action
,
181 char *rla
= getenv("GIT_REFLOG_ACTION");
182 static struct ref_lock
*lock
;
185 rla
= default_rla
.buf
;
186 snprintf(msg
, sizeof(msg
), "%s: %s", rla
, action
);
187 lock
= lock_any_ref_for_update(ref
->name
,
188 check_old
? ref
->old_sha1
: NULL
, 0);
191 if (write_ref_sha1(lock
, ref
->new_sha1
, msg
) < 0)
196 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
197 #define REFCOL_WIDTH 10
199 static int update_local_ref(struct ref
*ref
,
204 struct commit
*current
= NULL
, *updated
;
205 enum object_type type
;
206 struct branch
*current_branch
= branch_get(NULL
);
207 const char *pretty_ref
= ref
->name
+ (
208 !prefixcmp(ref
->name
, "refs/heads/") ? 11 :
209 !prefixcmp(ref
->name
, "refs/tags/") ? 10 :
210 !prefixcmp(ref
->name
, "refs/remotes/") ? 13 :
214 type
= sha1_object_info(ref
->new_sha1
, NULL
);
216 die("object %s not found", sha1_to_hex(ref
->new_sha1
));
221 sprintf(display
, "* branch %s -> FETCH_HEAD", remote
);
225 if (!hashcmp(ref
->old_sha1
, ref
->new_sha1
)) {
227 sprintf(display
, "= %-*s %-*s -> %s", SUMMARY_WIDTH
,
228 "[up to date]", REFCOL_WIDTH
, remote
,
233 if (current_branch
&&
234 !strcmp(ref
->name
, current_branch
->name
) &&
235 !(update_head_ok
|| is_bare_repository()) &&
236 !is_null_sha1(ref
->old_sha1
)) {
238 * If this is the head, and it's not okay to update
239 * the head, and the old value of the head isn't empty...
241 sprintf(display
, "! %-*s %-*s -> %s (can't fetch in current branch)",
242 SUMMARY_WIDTH
, "[rejected]", REFCOL_WIDTH
, remote
,
247 if (!is_null_sha1(ref
->old_sha1
) &&
248 !prefixcmp(ref
->name
, "refs/tags/")) {
249 sprintf(display
, "- %-*s %-*s -> %s",
250 SUMMARY_WIDTH
, "[tag update]", REFCOL_WIDTH
, remote
,
252 return s_update_ref("updating tag", ref
, 0);
255 current
= lookup_commit_reference_gently(ref
->old_sha1
, 1);
256 updated
= lookup_commit_reference_gently(ref
->new_sha1
, 1);
257 if (!current
|| !updated
) {
260 if (!strncmp(ref
->name
, "refs/tags/", 10)) {
265 msg
= "storing head";
266 what
= "[new branch]";
269 sprintf(display
, "* %-*s %-*s -> %s", SUMMARY_WIDTH
, what
,
270 REFCOL_WIDTH
, remote
, pretty_ref
);
271 return s_update_ref(msg
, ref
, 0);
274 if (in_merge_bases(current
, &updated
, 1)) {
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", SUMMARY_WIDTH
, quickref
,
280 REFCOL_WIDTH
, remote
, pretty_ref
);
281 return s_update_ref("fast forward", ref
, 1);
282 } else if (force
|| ref
->force
) {
284 strcpy(quickref
, find_unique_abbrev(current
->object
.sha1
, DEFAULT_ABBREV
));
285 strcat(quickref
, "...");
286 strcat(quickref
, find_unique_abbrev(ref
->new_sha1
, DEFAULT_ABBREV
));
287 sprintf(display
, "+ %-*s %-*s -> %s (forced update)",
288 SUMMARY_WIDTH
, quickref
, REFCOL_WIDTH
, remote
, pretty_ref
);
289 return s_update_ref("forced-update", ref
, 1);
291 sprintf(display
, "! %-*s %-*s -> %s (non fast forward)",
292 SUMMARY_WIDTH
, "[rejected]", REFCOL_WIDTH
, remote
,
298 static int store_updated_refs(const char *url
, struct ref
*ref_map
)
301 struct commit
*commit
;
302 int url_len
, i
, note_len
, shown_url
= 0;
304 const char *what
, *kind
;
306 char *filename
= git_path("FETCH_HEAD");
308 fp
= fopen(filename
, "a");
310 return error("cannot open %s: %s\n", filename
, strerror(errno
));
311 for (rm
= ref_map
; rm
; rm
= rm
->next
) {
312 struct ref
*ref
= NULL
;
315 ref
= xcalloc(1, sizeof(*ref
) + strlen(rm
->peer_ref
->name
) + 1);
316 strcpy(ref
->name
, rm
->peer_ref
->name
);
317 hashcpy(ref
->old_sha1
, rm
->peer_ref
->old_sha1
);
318 hashcpy(ref
->new_sha1
, rm
->old_sha1
);
319 ref
->force
= rm
->peer_ref
->force
;
322 commit
= lookup_commit_reference_gently(rm
->old_sha1
, 1);
326 if (!strcmp(rm
->name
, "HEAD")) {
330 else if (!prefixcmp(rm
->name
, "refs/heads/")) {
332 what
= rm
->name
+ 11;
334 else if (!prefixcmp(rm
->name
, "refs/tags/")) {
336 what
= rm
->name
+ 10;
338 else if (!prefixcmp(rm
->name
, "refs/remotes/")) {
339 kind
= "remote branch";
340 what
= rm
->name
+ 13;
347 url_len
= strlen(url
);
348 for (i
= url_len
- 1; url
[i
] == '/' && 0 <= i
; i
--)
351 if (4 < i
&& !strncmp(".git", url
+ i
- 3, 4))
357 note_len
+= sprintf(note
+ note_len
, "%s ",
359 note_len
+= sprintf(note
+ note_len
, "'%s' of ", what
);
361 note_len
+= sprintf(note
+ note_len
, "%.*s", url_len
, url
);
362 fprintf(fp
, "%s\t%s\t%s\n",
363 sha1_to_hex(commit
? commit
->object
.sha1
:
365 rm
->merge
? "" : "not-for-merge",
369 update_local_ref(ref
, what
, verbose
, note
);
372 fprintf(stderr
, "From %.*s\n",
376 fprintf(stderr
, " %s\n", note
);
385 * We would want to bypass the object transfer altogether if
386 * everything we are going to fetch already exists and connected
389 * The refs we are going to fetch are in to_fetch (nr_heads in
392 * $ git-rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
394 * does not error out, that means everything reachable from the
395 * refs we are going to fetch exists and is connected to some of
398 static int quickfetch(struct ref
*ref_map
)
400 struct child_process revlist
;
406 * If we are deepening a shallow clone we already have these
407 * objects reachable. Running rev-list here will return with
408 * a good (0) exit status and we'll bypass the fetch that we
409 * really need to perform. Claiming failure now will ensure
410 * we perform the network exchange to deepen our history.
415 for (i
= 0, ref
= ref_map
; ref
; ref
= ref
->next
)
420 argv
= xmalloc(sizeof(*argv
) * (i
+ 6));
422 argv
[i
++] = xstrdup("rev-list");
423 argv
[i
++] = xstrdup("--quiet");
424 argv
[i
++] = xstrdup("--objects");
425 for (ref
= ref_map
; ref
; ref
= ref
->next
)
426 argv
[i
++] = xstrdup(sha1_to_hex(ref
->old_sha1
));
427 argv
[i
++] = xstrdup("--not");
428 argv
[i
++] = xstrdup("--all");
431 memset(&revlist
, 0, sizeof(revlist
));
432 revlist
.argv
= (const char**)argv
;
434 revlist
.no_stdin
= 1;
435 revlist
.no_stdout
= 1;
436 revlist
.no_stderr
= 1;
437 err
= run_command(&revlist
);
439 for (i
= 0; argv
[i
]; i
++)
445 static int fetch_refs(struct transport
*transport
, struct ref
*ref_map
)
447 int ret
= quickfetch(ref_map
);
449 ret
= transport_fetch_refs(transport
, ref_map
);
451 ret
|= store_updated_refs(transport
->url
, ref_map
);
452 transport_unlock_pack(transport
);
456 static int add_existing(const char *refname
, const unsigned char *sha1
,
457 int flag
, void *cbdata
)
459 struct path_list
*list
= (struct path_list
*)cbdata
;
460 path_list_insert(refname
, list
);
464 static int will_fetch(struct ref
**head
, const unsigned char *sha1
)
466 struct ref
*rm
= *head
;
468 if (!hashcmp(rm
->old_sha1
, sha1
))
475 static void find_non_local_tags(struct transport
*transport
,
479 struct path_list existing_refs
= { NULL
, 0, 0, 0 };
480 struct path_list new_refs
= { NULL
, 0, 0, 1 };
483 const unsigned char *ref_sha1
;
484 const struct ref
*tag_ref
;
485 struct ref
*rm
= NULL
;
486 const struct ref
*ref
;
488 for_each_ref(add_existing
, &existing_refs
);
489 for (ref
= transport_get_remote_refs(transport
); ref
; ref
= ref
->next
) {
490 if (prefixcmp(ref
->name
, "refs/tags"))
493 ref_name
= xstrdup(ref
->name
);
494 ref_name_len
= strlen(ref_name
);
495 ref_sha1
= ref
->old_sha1
;
497 if (!strcmp(ref_name
+ ref_name_len
- 3, "^{}")) {
498 ref_name
[ref_name_len
- 3] = 0;
499 tag_ref
= transport_get_remote_refs(transport
);
501 if (!strcmp(tag_ref
->name
, ref_name
)) {
502 ref_sha1
= tag_ref
->old_sha1
;
505 tag_ref
= tag_ref
->next
;
509 if (!path_list_has_path(&existing_refs
, ref_name
) &&
510 !path_list_has_path(&new_refs
, ref_name
) &&
511 (has_sha1_file(ref
->old_sha1
) ||
512 will_fetch(head
, ref
->old_sha1
))) {
513 path_list_insert(ref_name
, &new_refs
);
515 rm
= alloc_ref(strlen(ref_name
) + 1);
516 strcpy(rm
->name
, ref_name
);
517 rm
->peer_ref
= alloc_ref(strlen(ref_name
) + 1);
518 strcpy(rm
->peer_ref
->name
, ref_name
);
519 hashcpy(rm
->old_sha1
, ref_sha1
);
526 path_list_clear(&existing_refs
, 0);
527 path_list_clear(&new_refs
, 0);
530 static int do_fetch(struct transport
*transport
,
531 struct refspec
*refs
, int ref_count
)
535 int autotags
= (transport
->remote
->fetch_tags
== 1);
536 if (transport
->remote
->fetch_tags
== 2 && tags
!= TAGS_UNSET
)
538 if (transport
->remote
->fetch_tags
== -1)
541 if (!transport
->get_refs_list
|| !transport
->fetch
)
542 die("Don't know how to fetch from %s", transport
->url
);
544 /* if not appending, truncate FETCH_HEAD */
546 char *filename
= git_path("FETCH_HEAD");
547 FILE *fp
= fopen(filename
, "w");
549 return error("cannot open %s: %s\n", filename
, strerror(errno
));
553 ref_map
= get_ref_map(transport
, refs
, ref_count
, tags
, &autotags
);
555 for (rm
= ref_map
; rm
; rm
= rm
->next
) {
557 read_ref(rm
->peer_ref
->name
, rm
->peer_ref
->old_sha1
);
560 if (tags
== TAGS_DEFAULT
&& autotags
)
561 transport_set_option(transport
, TRANS_OPT_FOLLOWTAGS
, "1");
562 if (fetch_refs(transport
, ref_map
)) {
568 /* if neither --no-tags nor --tags was specified, do automated tag
570 if (tags
== TAGS_DEFAULT
&& autotags
) {
571 struct ref
**tail
= &ref_map
;
573 find_non_local_tags(transport
, &ref_map
, &tail
);
575 transport_set_option(transport
, TRANS_OPT_FOLLOWTAGS
, NULL
);
576 transport_set_option(transport
, TRANS_OPT_DEPTH
, "0");
577 fetch_refs(transport
, ref_map
);
582 transport_disconnect(transport
);
587 static void set_option(const char *name
, const char *value
)
589 int r
= transport_set_option(transport
, name
, value
);
591 die("Option \"%s\" value \"%s\" is not valid for %s\n",
592 name
, value
, transport
->url
);
594 warning("Option \"%s\" is ignored for %s\n",
595 name
, transport
->url
);
598 int cmd_fetch(int argc
, const char **argv
, const char *prefix
)
600 struct remote
*remote
;
602 static const char **refs
= NULL
;
605 /* Record the command line for the reflog */
606 strbuf_addstr(&default_rla
, "fetch");
607 for (i
= 1; i
< argc
; i
++)
608 strbuf_addf(&default_rla
, " %s", argv
[i
]);
610 argc
= parse_options(argc
, argv
,
611 builtin_fetch_options
, builtin_fetch_usage
, 0);
614 remote
= remote_get(NULL
);
616 remote
= remote_get(argv
[0]);
618 transport
= transport_get(remote
, remote
->url
[0]);
620 transport
->verbose
= 1;
622 transport
->verbose
= -1;
624 set_option(TRANS_OPT_UPLOADPACK
, upload_pack
);
626 set_option(TRANS_OPT_KEEP
, "yes");
628 set_option(TRANS_OPT_DEPTH
, depth
);
631 die("Where do you want to fetch from today?");
635 refs
= xcalloc(argc
+ 1, sizeof(const char *));
636 for (i
= 1; i
< argc
; i
++) {
637 if (!strcmp(argv
[i
], "tag")) {
641 die("You need to specify a tag name.");
642 ref
= xmalloc(strlen(argv
[i
]) * 2 + 22);
643 strcpy(ref
, "refs/tags/");
644 strcat(ref
, argv
[i
]);
645 strcat(ref
, ":refs/tags/");
646 strcat(ref
, argv
[i
]);
655 signal(SIGINT
, unlock_pack_on_signal
);
657 return do_fetch(transport
,
658 parse_fetch_refspec(ref_nr
, refs
), ref_nr
);