1#!/bin/sh
2#
3USAGE='<fetch-options> <repository> <refspec>...'
5SUBDIRECTORY_OK=Yes
6. git-sh-setup
7TOP=$(git-rev-parse --show-cdup)
8if test ! -z "$TOP"
9then
10 cd "$TOP"
11fi
12. git-parse-remote
13_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
14_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
15LF='
17'
18IFS="$LF"
19rloga=fetch
21no_tags=
22tags=
23append=
24force=
25verbose=
26update_head_ok=
27exec=
28upload_pack=
29keep=
30shallow_depth=
31while case "$#" in 0) break ;; esac
32do
33 case "$1" in
34 -a|--a|--ap|--app|--appe|--appen|--append)
35 append=t
36 ;;
37 --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
38 --upload-pa|--upload-pac|--upload-pack)
39 shift
40 exec="--exec=$1"
41 upload_pack="-u $1"
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 --reflog-action=*)
64 rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`
65 ;;
66 --depth=*)
67 shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
68 ;;
69 --depth)
70 shift
71 shallow_depth="--depth=$1"
72 ;;
73 -*)
74 usage
75 ;;
76 *)
77 break
78 ;;
79 esac
80 shift
81done
82case "$#" in
840)
85 origin=$(get_default_remote)
86 test -n "$(get_remote_url ${origin})" ||
87 die "Where do you want to fetch from today?"
88 set x $origin ; shift ;;
89esac
90remote_nick="$1"
92remote=$(get_remote_url "$@")
93refs=
94rref=
95rsync_slurped_objects=
96rloga="$rloga $remote_nick"
98test "$remote_nick" = "$remote" || rloga="$rloga $remote"
99if test "" = "$append"
101then
102 : >"$GIT_DIR/FETCH_HEAD"
103fi
104# Global that is reused later
106ls_remote_result=$(git ls-remote $upload_pack "$remote") ||
107 die "Cannot get the repository state from $remote"
108append_fetch_head () {
110 head_="$1"
111 remote_="$2"
112 remote_name_="$3"
113 remote_nick_="$4"
114 local_name_="$5"
115 case "$6" in
116 t) not_for_merge_='not-for-merge' ;;
117 '') not_for_merge_= ;;
118 esac
119 # remote-nick is the URL given on the command line (or a shorthand)
121 # remote-name is the $GIT_DIR relative refs/ path we computed
122 # for this refspec.
123 # the $note_ variable will be fed to git-fmt-merge-msg for further
125 # processing.
126 case "$remote_name_" in
127 HEAD)
128 note_= ;;
129 refs/heads/*)
130 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
131 note_="branch '$note_' of " ;;
132 refs/tags/*)
133 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
134 note_="tag '$note_' of " ;;
135 refs/remotes/*)
136 note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
137 note_="remote branch '$note_' of " ;;
138 *)
139 note_="$remote_name of " ;;
140 esac
141 remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
142 remote_="$remote_1_"
143 note_="$note_$remote_"
144 # 2.6.11-tree tag would not be happy to be fed to resolve.
146 if git-cat-file commit "$head_" >/dev/null 2>&1
147 then
148 headc_=$(git-rev-parse --verify "$head_^0") || exit
149 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
150 else
151 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
152 fi
153 update_local_ref "$local_name_" "$head_" "$note_"
155}
156update_local_ref () {
158 # If we are storing the head locally make sure that it is
159 # a fast forward (aka "reverse push").
160 label_=$(git-cat-file -t $2)
162 newshort_=$(git-rev-parse --short $2)
163 if test -z "$1" ; then
164 [ "$verbose" ] && echo >&2 "* fetched $3"
165 [ "$verbose" ] && echo >&2 " $label_: $newshort_"
166 return 0
167 fi
168 oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
169 case "$1" in
171 refs/tags/*)
172 # Tags need not be pointing at commits so there
173 # is no way to guarantee "fast-forward" anyway.
174 if test -n "$oldshort_"
175 then
176 if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
177 then
178 [ "$verbose" ] && echo >&2 "* $1: same as $3"
179 [ "$verbose" ] && echo >&2 " $label_: $newshort_" ||:
180 else
181 echo >&2 "* $1: updating with $3"
182 echo >&2 " $label_: $newshort_"
183 git-update-ref -m "$rloga: updating tag" "$1" "$2"
184 fi
185 else
186 echo >&2 "* $1: storing $3"
187 echo >&2 " $label_: $newshort_"
188 git-update-ref -m "$rloga: storing tag" "$1" "$2"
189 fi
190 ;;
191 refs/heads/* | refs/remotes/*)
193 # $1 is the ref being updated.
194 # $2 is the new value for the ref.
195 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
196 if test "$local"
197 then
198 # Require fast-forward.
199 mb=$(git-merge-base "$local" "$2") &&
200 case "$2,$mb" in
201 $local,*)
202 if test -n "$verbose"
203 then
204 echo >&2 "* $1: same as $3"
205 echo >&2 " $label_: $newshort_"
206 fi
207 ;;
208 *,$local)
209 echo >&2 "* $1: fast forward to $3"
210 echo >&2 " old..new: $oldshort_..$newshort_"
211 git-update-ref -m "$rloga: fast-forward" "$1" "$2" "$local"
212 ;;
213 *)
214 false
215 ;;
216 esac || {
217 case ",$force,$single_force," in
218 *,t,*)
219 echo >&2 "* $1: forcing update to non-fast forward $3"
220 echo >&2 " old...new: $oldshort_...$newshort_"
221 git-update-ref -m "$rloga: forced-update" "$1" "$2" "$local"
222 ;;
223 *)
224 echo >&2 "* $1: not updating to non-fast forward $3"
225 echo >&2 " old...new: $oldshort_...$newshort_"
226 exit 1
227 ;;
228 esac
229 }
230 else
231 echo >&2 "* $1: storing $3"
232 echo >&2 " $label_: $newshort_"
233 git-update-ref -m "$rloga: storing head" "$1" "$2"
234 fi
235 ;;
236 esac
237}
238case "$update_head_ok" in
240'')
241 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
242 ;;
243esac
244# If --tags (and later --heads or --all) is specified, then we are
246# not talking about defaults stored in Pull: line of remotes or
247# branches file, and just fetch those and refspecs explicitly given.
248# Otherwise we do what we always did.
249reflist=$(get_remote_refs_for_fetch "$@")
251if test "$tags"
252then
253 taglist=`IFS=' ' &&
254 echo "$ls_remote_result" |
255 while read sha1 name
256 do
257 case "$sha1" in
258 fail)
259 exit 1
260 esac
261 case "$name" in
262 *^*) continue ;;
263 refs/tags/*) ;;
264 *) continue ;;
265 esac
266 if git-check-ref-format "$name"
267 then
268 echo ".${name}:${name}"
269 else
270 echo >&2 "warning: tag ${name} ignored"
271 fi
272 done` || exit
273 if test "$#" -gt 1
274 then
275 # remote URL plus explicit refspecs; we need to merge them.
276 reflist="$reflist$LF$taglist"
277 else
278 # No explicit refspecs; fetch tags only.
279 reflist=$taglist
280 fi
281fi
282fetch_main () {
284 reflist="$1"
285 refs=
286 rref=
287 for ref in $reflist
289 do
290 refs="$refs$LF$ref"
291 # These are relative path from $GIT_DIR, typically starting at refs/
293 # but may be HEAD
294 if expr "z$ref" : 'z\.' >/dev/null
295 then
296 not_for_merge=t
297 ref=$(expr "z$ref" : 'z\.\(.*\)')
298 else
299 not_for_merge=
300 fi
301 if expr "z$ref" : 'z+' >/dev/null
302 then
303 single_force=t
304 ref=$(expr "z$ref" : 'z+\(.*\)')
305 else
306 single_force=
307 fi
308 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
309 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
310 rref="$rref$LF$remote_name"
312 # There are transports that can fetch only one head at a time...
314 case "$remote" in
315 http://* | https://* | ftp://*)
316 test -n "$shallow_depth" &&
317 die "shallow clone with http not supported"
318 proto=`expr "$remote" : '\([^:]*\):'`
319 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
320 curl_extra_args="-k"
321 fi
322 if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
323 "`git-repo-config --bool http.noEPSV`" = true ]; then
324 noepsv_opt="--disable-epsv"
325 fi
326 # Find $remote_name from ls-remote output.
328 head=$(
329 IFS=' '
330 echo "$ls_remote_result" |
331 while read sha1 name
332 do
333 test "z$name" = "z$remote_name" || continue
334 echo "$sha1"
335 break
336 done
337 )
338 expr "z$head" : "z$_x40\$" >/dev/null ||
339 die "No such ref $remote_name at $remote"
340 echo >&2 "Fetching $remote_name from $remote using $proto"
341 git-http-fetch -v -a "$head" "$remote/" || exit
342 ;;
343 rsync://*)
344 test -n "$shallow_depth" &&
345 die "shallow clone with rsync not supported"
346 TMP_HEAD="$GIT_DIR/TMP_HEAD"
347 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
348 head=$(git-rev-parse --verify TMP_HEAD)
349 rm -f "$TMP_HEAD"
350 test "$rsync_slurped_objects" || {
351 rsync -av --ignore-existing --exclude info \
352 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
353 # Look at objects/info/alternates for rsync -- http will
355 # support it natively and git native ones will do it on
356 # the remote end. Not having that file is not a crime.
357 rsync -q "$remote/objects/info/alternates" \
358 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
359 rm -f "$GIT_DIR/TMP_ALT"
360 if test -f "$GIT_DIR/TMP_ALT"
361 then
362 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
363 while read alt
364 do
365 case "$alt" in 'bad alternate: '*) die "$alt";; esac
366 echo >&2 "Getting alternate: $alt"
367 rsync -av --ignore-existing --exclude info \
368 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
369 done
370 rm -f "$GIT_DIR/TMP_ALT"
371 fi
372 rsync_slurped_objects=t
373 }
374 ;;
375 *)
376 # We will do git native transport with just one call later.
377 continue ;;
378 esac
379 append_fetch_head "$head" "$remote" \
381 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
382 done
384 case "$remote" in
386 http://* | https://* | ftp://* | rsync://* )
387 ;; # we are already done.
388 *)
389 ( : subshell because we muck with IFS
390 pack_lockfile=
391 IFS=" $LF"
392 (
393 git-fetch-pack --thin $exec $keep $shallow_depth "$remote" $rref || echo failed "$remote"
394 ) |
395 while read sha1 remote_name
396 do
397 case "$sha1" in
398 failed)
399 echo >&2 "Fetch failure: $remote"
400 exit 1 ;;
401 # special line coming from index-pack with the pack name
402 pack)
403 continue ;;
404 keep)
405 pack_lockfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
406 continue ;;
407 esac
408 found=
409 single_force=
410 for ref in $refs
411 do
412 case "$ref" in
413 +$remote_name:*)
414 single_force=t
415 not_for_merge=
416 found="$ref"
417 break ;;
418 .+$remote_name:*)
419 single_force=t
420 not_for_merge=t
421 found="$ref"
422 break ;;
423 .$remote_name:*)
424 not_for_merge=t
425 found="$ref"
426 break ;;
427 $remote_name:*)
428 not_for_merge=
429 found="$ref"
430 break ;;
431 esac
432 done
433 local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
434 append_fetch_head "$sha1" "$remote" \
435 "$remote_name" "$remote_nick" "$local_name" \
436 "$not_for_merge" || exit
437 done &&
438 if [ "$pack_lockfile" ]; then rm -f "$pack_lockfile"; fi
439 ) || exit ;;
440 esac
441}
443fetch_main "$reflist" || exit
445# automated tag following
447case "$no_tags$tags" in
448'')
449 case "$reflist" in
450 *:refs/*)
451 # effective only when we are following remote branch
452 # using local tracking branch.
453 taglist=$(IFS=' ' &&
454 echo "$ls_remote_result" |
455 git-show-ref --exclude-existing=refs/tags/ |
456 while read sha1 name
457 do
458 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
459 echo >&2 "Auto-following $name"
460 echo ".${name}:${name}"
461 done)
462 esac
463 case "$taglist" in
464 '') ;;
465 ?*)
466 # do not deepen a shallow tree when following tags
467 shallow_depth=
468 fetch_main "$taglist" || exit ;;
469 esac
470esac
471# If the original head was empty (i.e. no "master" yet), or
473# if we were told not to worry, we do not have to check.
474case "$orig_head" in
475'')
476 ;;
477?*)
478 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
479 if test "$curr_head" != "$orig_head"
480 then
481 git-update-ref \
482 -m "$rloga: Undoing incorrectly fetched HEAD." \
483 HEAD "$orig_head"
484 die "Cannot fetch into the current branch."
485 fi
486 ;;
487esac