1#!/bin/sh
2#
3USAGE='<fetch-options> <repository> <refspec>...'
5SUBDIRECTORY_OK=Yes
6. git-sh-setup
7set_reflog_action "fetch $*"
8cd_to_toplevel ;# probably unnecessary...
9. git-parse-remote
11_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
12_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
13LF='
15'
16IFS="$LF"
17no_tags=
19tags=
20append=
21force=
22verbose=
23update_head_ok=
24exec=
25keep=
26shallow_depth=
27while case "$#" in 0) break ;; esac
28do
29 case "$1" in
30 -a|--a|--ap|--app|--appe|--appen|--append)
31 append=t
32 ;;
33 --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
34 --upload-pa|--upload-pac|--upload-pack)
35 shift
36 exec="--upload-pack=$1"
37 ;;
38 --upl=*|--uplo=*|--uploa=*|--upload=*|\
39 --upload-=*|--upload-p=*|--upload-pa=*|--upload-pac=*|--upload-pack=*)
40 exec=--upload-pack=$(expr "$1" : '-[^=]*=\(.*\)')
41 shift
42 ;;
43 -f|--f|--fo|--for|--forc|--force)
44 force=t
45 ;;
46 -t|--t|--ta|--tag|--tags)
47 tags=t
48 ;;
49 -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
50 no_tags=t
51 ;;
52 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
53 --update-he|--update-hea|--update-head|--update-head-|\
54 --update-head-o|--update-head-ok)
55 update_head_ok=t
56 ;;
57 -v|--verbose)
58 verbose=Yes
59 ;;
60 -k|--k|--ke|--kee|--keep)
61 keep='-k -k'
62 ;;
63 --depth=*)
64 shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
65 ;;
66 --depth)
67 shift
68 shallow_depth="--depth=$1"
69 ;;
70 -*)
71 usage
72 ;;
73 *)
74 break
75 ;;
76 esac
77 shift
78done
79case "$#" in
810)
82 origin=$(get_default_remote)
83 test -n "$(get_remote_url ${origin})" ||
84 die "Where do you want to fetch from today?"
85 set x $origin ; shift ;;
86esac
87remote_nick="$1"
89remote=$(get_remote_url "$@")
90refs=
91rref=
92rsync_slurped_objects=
93if test "" = "$append"
95then
96 : >"$GIT_DIR/FETCH_HEAD"
97fi
98# Global that is reused later
100ls_remote_result=$(git ls-remote $exec "$remote") ||
101 die "Cannot get the repository state from $remote"
102append_fetch_head () {
104 head_="$1"
105 remote_="$2"
106 remote_name_="$3"
107 remote_nick_="$4"
108 local_name_="$5"
109 case "$6" in
110 t) not_for_merge_='not-for-merge' ;;
111 '') not_for_merge_= ;;
112 esac
113 # remote-nick is the URL given on the command line (or a shorthand)
115 # remote-name is the $GIT_DIR relative refs/ path we computed
116 # for this refspec.
117 # the $note_ variable will be fed to git-fmt-merge-msg for further
119 # processing.
120 case "$remote_name_" in
121 HEAD)
122 note_= ;;
123 refs/heads/*)
124 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
125 note_="branch '$note_' of " ;;
126 refs/tags/*)
127 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
128 note_="tag '$note_' of " ;;
129 refs/remotes/*)
130 note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
131 note_="remote branch '$note_' of " ;;
132 *)
133 note_="$remote_name of " ;;
134 esac
135 remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
136 remote_="$remote_1_"
137 note_="$note_$remote_"
138 # 2.6.11-tree tag would not be happy to be fed to resolve.
140 if git-cat-file commit "$head_" >/dev/null 2>&1
141 then
142 headc_=$(git-rev-parse --verify "$head_^0") || exit
143 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
144 else
145 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
146 fi
147 update_local_ref "$local_name_" "$head_" "$note_"
149}
150update_local_ref () {
152 # If we are storing the head locally make sure that it is
153 # a fast forward (aka "reverse push").
154 label_=$(git-cat-file -t $2)
156 newshort_=$(git-rev-parse --short $2)
157 if test -z "$1" ; then
158 [ "$verbose" ] && echo >&2 "* fetched $3"
159 [ "$verbose" ] && echo >&2 " $label_: $newshort_"
160 return 0
161 fi
162 oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
163 case "$1" in
165 refs/tags/*)
166 # Tags need not be pointing at commits so there
167 # is no way to guarantee "fast-forward" anyway.
168 if test -n "$oldshort_"
169 then
170 if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
171 then
172 [ "$verbose" ] && echo >&2 "* $1: same as $3"
173 [ "$verbose" ] && echo >&2 " $label_: $newshort_" ||:
174 else
175 echo >&2 "* $1: updating with $3"
176 echo >&2 " $label_: $newshort_"
177 git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
178 fi
179 else
180 echo >&2 "* $1: storing $3"
181 echo >&2 " $label_: $newshort_"
182 git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
183 fi
184 ;;
185 refs/heads/* | refs/remotes/*)
187 # $1 is the ref being updated.
188 # $2 is the new value for the ref.
189 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
190 if test "$local"
191 then
192 # Require fast-forward.
193 mb=$(git-merge-base "$local" "$2") &&
194 case "$2,$mb" in
195 $local,*)
196 if test -n "$verbose"
197 then
198 echo >&2 "* $1: same as $3"
199 echo >&2 " $label_: $newshort_"
200 fi
201 ;;
202 *,$local)
203 echo >&2 "* $1: fast forward to $3"
204 echo >&2 " old..new: $oldshort_..$newshort_"
205 git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
206 ;;
207 *)
208 false
209 ;;
210 esac || {
211 case ",$force,$single_force," in
212 *,t,*)
213 echo >&2 "* $1: forcing update to non-fast forward $3"
214 echo >&2 " old...new: $oldshort_...$newshort_"
215 git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
216 ;;
217 *)
218 echo >&2 "* $1: not updating to non-fast forward $3"
219 echo >&2 " old...new: $oldshort_...$newshort_"
220 exit 1
221 ;;
222 esac
223 }
224 else
225 echo >&2 "* $1: storing $3"
226 echo >&2 " $label_: $newshort_"
227 git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
228 fi
229 ;;
230 esac
231}
232# updating the current HEAD with git-fetch in a bare
234# repository is always fine.
235if test -z "$update_head_ok" && test $(is_bare_repository) = false
236then
237 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
238fi
239# If --tags (and later --heads or --all) is specified, then we are
241# not talking about defaults stored in Pull: line of remotes or
242# branches file, and just fetch those and refspecs explicitly given.
243# Otherwise we do what we always did.
244reflist=$(get_remote_refs_for_fetch "$@")
246if test "$tags"
247then
248 taglist=`IFS=' ' &&
249 echo "$ls_remote_result" |
250 while read sha1 name
251 do
252 case "$sha1" in
253 fail)
254 exit 1
255 esac
256 case "$name" in
257 *^*) continue ;;
258 refs/tags/*) ;;
259 *) continue ;;
260 esac
261 if git-check-ref-format "$name"
262 then
263 echo ".${name}:${name}"
264 else
265 echo >&2 "warning: tag ${name} ignored"
266 fi
267 done` || exit
268 if test "$#" -gt 1
269 then
270 # remote URL plus explicit refspecs; we need to merge them.
271 reflist="$reflist$LF$taglist"
272 else
273 # No explicit refspecs; fetch tags only.
274 reflist=$taglist
275 fi
276fi
277fetch_main () {
279 reflist="$1"
280 refs=
281 rref=
282 for ref in $reflist
284 do
285 refs="$refs$LF$ref"
286 # These are relative path from $GIT_DIR, typically starting at refs/
288 # but may be HEAD
289 if expr "z$ref" : 'z\.' >/dev/null
290 then
291 not_for_merge=t
292 ref=$(expr "z$ref" : 'z\.\(.*\)')
293 else
294 not_for_merge=
295 fi
296 if expr "z$ref" : 'z+' >/dev/null
297 then
298 single_force=t
299 ref=$(expr "z$ref" : 'z+\(.*\)')
300 else
301 single_force=
302 fi
303 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
304 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
305 rref="$rref$LF$remote_name"
307 # There are transports that can fetch only one head at a time...
309 case "$remote" in
310 http://* | https://* | ftp://*)
311 test -n "$shallow_depth" &&
312 die "shallow clone with http not supported"
313 proto=`expr "$remote" : '\([^:]*\):'`
314 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
315 curl_extra_args="-k"
316 fi
317 if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
318 "`git-repo-config --bool http.noEPSV`" = true ]; then
319 noepsv_opt="--disable-epsv"
320 fi
321 # Find $remote_name from ls-remote output.
323 head=$(
324 IFS=' '
325 echo "$ls_remote_result" |
326 while read sha1 name
327 do
328 test "z$name" = "z$remote_name" || continue
329 echo "$sha1"
330 break
331 done
332 )
333 expr "z$head" : "z$_x40\$" >/dev/null ||
334 die "No such ref $remote_name at $remote"
335 echo >&2 "Fetching $remote_name from $remote using $proto"
336 git-http-fetch -v -a "$head" "$remote/" || exit
337 ;;
338 rsync://*)
339 test -n "$shallow_depth" &&
340 die "shallow clone with rsync not supported"
341 TMP_HEAD="$GIT_DIR/TMP_HEAD"
342 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
343 head=$(git-rev-parse --verify TMP_HEAD)
344 rm -f "$TMP_HEAD"
345 test "$rsync_slurped_objects" || {
346 rsync -av --ignore-existing --exclude info \
347 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
348 # Look at objects/info/alternates for rsync -- http will
350 # support it natively and git native ones will do it on
351 # the remote end. Not having that file is not a crime.
352 rsync -q "$remote/objects/info/alternates" \
353 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
354 rm -f "$GIT_DIR/TMP_ALT"
355 if test -f "$GIT_DIR/TMP_ALT"
356 then
357 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
358 while read alt
359 do
360 case "$alt" in 'bad alternate: '*) die "$alt";; esac
361 echo >&2 "Getting alternate: $alt"
362 rsync -av --ignore-existing --exclude info \
363 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
364 done
365 rm -f "$GIT_DIR/TMP_ALT"
366 fi
367 rsync_slurped_objects=t
368 }
369 ;;
370 *)
371 # We will do git native transport with just one call later.
372 continue ;;
373 esac
374 append_fetch_head "$head" "$remote" \
376 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
377 done
379 case "$remote" in
381 http://* | https://* | ftp://* | rsync://* )
382 ;; # we are already done.
383 *)
384 ( : subshell because we muck with IFS
385 IFS=" $LF"
386 (
387 git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref ||
388 echo failed "$remote"
389 ) |
390 (
391 trap '
392 if test -n "$keepfile" && test -f "$keepfile"
393 then
394 rm -f "$keepfile"
395 fi
396 ' 0
397 keepfile=
399 while read sha1 remote_name
400 do
401 case "$sha1" in
402 failed)
403 echo >&2 "Fetch failure: $remote"
404 exit 1 ;;
405 # special line coming from index-pack with the pack name
406 pack)
407 continue ;;
408 keep)
409 keepfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
410 continue ;;
411 esac
412 found=
413 single_force=
414 for ref in $refs
415 do
416 case "$ref" in
417 +$remote_name:*)
418 single_force=t
419 not_for_merge=
420 found="$ref"
421 break ;;
422 .+$remote_name:*)
423 single_force=t
424 not_for_merge=t
425 found="$ref"
426 break ;;
427 .$remote_name:*)
428 not_for_merge=t
429 found="$ref"
430 break ;;
431 $remote_name:*)
432 not_for_merge=
433 found="$ref"
434 break ;;
435 esac
436 done
437 local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
438 append_fetch_head "$sha1" "$remote" \
439 "$remote_name" "$remote_nick" "$local_name" \
440 "$not_for_merge" || exit
441 done
442 )
443 ) || exit ;;
444 esac
445}
447fetch_main "$reflist" || exit
449# automated tag following
451case "$no_tags$tags" in
452'')
453 case "$reflist" in
454 *:refs/*)
455 # effective only when we are following remote branch
456 # using local tracking branch.
457 taglist=$(IFS=' ' &&
458 echo "$ls_remote_result" |
459 git-show-ref --exclude-existing=refs/tags/ |
460 while read sha1 name
461 do
462 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
463 echo >&2 "Auto-following $name"
464 echo ".${name}:${name}"
465 done)
466 esac
467 case "$taglist" in
468 '') ;;
469 ?*)
470 # do not deepen a shallow tree when following tags
471 shallow_depth=
472 fetch_main "$taglist" || exit ;;
473 esac
474esac
475# If the original head was empty (i.e. no "master" yet), or
477# if we were told not to worry, we do not have to check.
478case "$orig_head" in
479'')
480 ;;
481?*)
482 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
483 if test "$curr_head" != "$orig_head"
484 then
485 git-update-ref \
486 -m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
487 HEAD "$orig_head"
488 die "Cannot fetch into the current branch."
489 fi
490 ;;
491esac