1#!/bin/sh
2#
3
4USAGE='<fetch-options> <repository> <refspec>...'
5. git-sh-setup
6. git-parse-remote
7_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
8_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
9
10LF='
11'
12IFS="$LF"
13
14rloga=fetch
15no_tags=
16tags=
17append=
18force=
19verbose=
20update_head_ok=
21exec=
22upload_pack=
23keep=
24while case "$#" in 0) break ;; esac
25do
26 case "$1" in
27 -a|--a|--ap|--app|--appe|--appen|--append)
28 append=t
29 ;;
30 --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
31 --upload-pa|--upload-pac|--upload-pack)
32 shift
33 exec="--exec=$1"
34 upload_pack="-u $1"
35 ;;
36 -f|--f|--fo|--for|--forc|--force)
37 force=t
38 ;;
39 -t|--t|--ta|--tag|--tags)
40 tags=t
41 ;;
42 -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
43 no_tags=t
44 ;;
45 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
46 --update-he|--update-hea|--update-head|--update-head-|\
47 --update-head-o|--update-head-ok)
48 update_head_ok=t
49 ;;
50 -v|--verbose)
51 verbose=Yes
52 ;;
53 -k|--k|--ke|--kee|--keep)
54 keep='-k -k'
55 ;;
56 --reflog-action=*)
57 rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`
58 ;;
59 -*)
60 usage
61 ;;
62 *)
63 break
64 ;;
65 esac
66 shift
67done
68
69case "$#" in
700)
71 origin=$(get_default_remote)
72 test -n "$(get_remote_url ${origin})" ||
73 die "Where do you want to fetch from today?"
74 set x $origin ; shift ;;
75esac
76
77remote_nick="$1"
78remote=$(get_remote_url "$@")
79refs=
80rref=
81rsync_slurped_objects=
82
83rloga="$rloga $remote_nick"
84test "$remote_nick" = "$remote" || rloga="$rloga $remote"
85
86if test "" = "$append"
87then
88 : >"$GIT_DIR/FETCH_HEAD"
89fi
90
91# Global that is reused later
92ls_remote_result=$(git ls-remote $upload_pack "$remote") ||
93 die "Cannot find the reflist at $remote"
94
95append_fetch_head () {
96 head_="$1"
97 remote_="$2"
98 remote_name_="$3"
99 remote_nick_="$4"
100 local_name_="$5"
101 case "$6" in
102 t) not_for_merge_='not-for-merge' ;;
103 '') not_for_merge_= ;;
104 esac
105
106 # remote-nick is the URL given on the command line (or a shorthand)
107 # remote-name is the $GIT_DIR relative refs/ path we computed
108 # for this refspec.
109
110 # the $note_ variable will be fed to git-fmt-merge-msg for further
111 # processing.
112 case "$remote_name_" in
113 HEAD)
114 note_= ;;
115 refs/heads/*)
116 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
117 note_="branch '$note_' of " ;;
118 refs/tags/*)
119 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
120 note_="tag '$note_' of " ;;
121 refs/remotes/*)
122 note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
123 note_="remote branch '$note_' of " ;;
124 *)
125 note_="$remote_name of " ;;
126 esac
127 remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
128 remote_="$remote_1_"
129 note_="$note_$remote_"
130
131 # 2.6.11-tree tag would not be happy to be fed to resolve.
132 if git-cat-file commit "$head_" >/dev/null 2>&1
133 then
134 headc_=$(git-rev-parse --verify "$head_^0") || exit
135 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
136 else
137 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
138 fi
139
140 update_local_ref "$local_name_" "$head_" "$note_"
141}
142
143update_local_ref () {
144 # If we are storing the head locally make sure that it is
145 # a fast forward (aka "reverse push").
146
147 label_=$(git-cat-file -t $2)
148 newshort_=$(git-rev-parse --short $2)
149 if test -z "$1" ; then
150 [ "$verbose" ] && echo >&2 "* fetched $3"
151 [ "$verbose" ] && echo >&2 " $label_: $newshort_"
152 return 0
153 fi
154 oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
155
156 case "$1" in
157 refs/tags/*)
158 # Tags need not be pointing at commits so there
159 # is no way to guarantee "fast-forward" anyway.
160 if test -n "$oldshort_"
161 then
162 if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
163 then
164 [ "$verbose" ] && echo >&2 "* $1: same as $3"
165 [ "$verbose" ] && echo >&2 " $label_: $newshort_" ||:
166 else
167 echo >&2 "* $1: updating with $3"
168 echo >&2 " $label_: $newshort_"
169 git-update-ref -m "$rloga: updating tag" "$1" "$2"
170 fi
171 else
172 echo >&2 "* $1: storing $3"
173 echo >&2 " $label_: $newshort_"
174 git-update-ref -m "$rloga: storing tag" "$1" "$2"
175 fi
176 ;;
177
178 refs/heads/* | refs/remotes/*)
179 # $1 is the ref being updated.
180 # $2 is the new value for the ref.
181 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
182 if test "$local"
183 then
184 # Require fast-forward.
185 mb=$(git-merge-base "$local" "$2") &&
186 case "$2,$mb" in
187 $local,*)
188 if test -n "$verbose"
189 then
190 echo >&2 "* $1: same as $3"
191 echo >&2 " $label_: $newshort_"
192 fi
193 ;;
194 *,$local)
195 echo >&2 "* $1: fast forward to $3"
196 echo >&2 " old..new: $oldshort_..$newshort_"
197 git-update-ref -m "$rloga: fast-forward" "$1" "$2" "$local"
198 ;;
199 *)
200 false
201 ;;
202 esac || {
203 case ",$force,$single_force," in
204 *,t,*)
205 echo >&2 "* $1: forcing update to non-fast forward $3"
206 echo >&2 " old...new: $oldshort_...$newshort_"
207 git-update-ref -m "$rloga: forced-update" "$1" "$2" "$local"
208 ;;
209 *)
210 echo >&2 "* $1: not updating to non-fast forward $3"
211 echo >&2 " old...new: $oldshort_...$newshort_"
212 exit 1
213 ;;
214 esac
215 }
216 else
217 echo >&2 "* $1: storing $3"
218 echo >&2 " $label_: $newshort_"
219 git-update-ref -m "$rloga: storing head" "$1" "$2"
220 fi
221 ;;
222 esac
223}
224
225case "$update_head_ok" in
226'')
227 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
228 ;;
229esac
230
231# If --tags (and later --heads or --all) is specified, then we are
232# not talking about defaults stored in Pull: line of remotes or
233# branches file, and just fetch those and refspecs explicitly given.
234# Otherwise we do what we always did.
235
236reflist=$(get_remote_refs_for_fetch "$@")
237if test "$tags"
238then
239 taglist=`IFS=" " &&
240 echo "$ls_remote_result" |
241 while read sha1 name
242 do
243 case "$sha1" in
244 fail)
245 exit 1
246 esac
247 case "$name" in
248 *^*) continue ;;
249 refs/tags/*) ;;
250 *) continue ;;
251 esac
252 if git-check-ref-format "$name"
253 then
254 echo ".${name}:${name}"
255 else
256 echo >&2 "warning: tag ${name} ignored"
257 fi
258 done` || exit
259 if test "$#" -gt 1
260 then
261 # remote URL plus explicit refspecs; we need to merge them.
262 reflist="$reflist$LF$taglist"
263 else
264 # No explicit refspecs; fetch tags only.
265 reflist=$taglist
266 fi
267fi
268
269fetch_main () {
270 reflist="$1"
271 refs=
272 rref=
273
274 for ref in $reflist
275 do
276 refs="$refs$LF$ref"
277
278 # These are relative path from $GIT_DIR, typically starting at refs/
279 # but may be HEAD
280 if expr "z$ref" : 'z\.' >/dev/null
281 then
282 not_for_merge=t
283 ref=$(expr "z$ref" : 'z\.\(.*\)')
284 else
285 not_for_merge=
286 fi
287 if expr "z$ref" : 'z+' >/dev/null
288 then
289 single_force=t
290 ref=$(expr "z$ref" : 'z+\(.*\)')
291 else
292 single_force=
293 fi
294 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
295 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
296
297 rref="$rref$LF$remote_name"
298
299 # There are transports that can fetch only one head at a time...
300 case "$remote" in
301 http://* | https://* | ftp://*)
302 proto=`expr "$remote" : '\([^:]*\):'`
303 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
304 curl_extra_args="-k"
305 fi
306 if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
307 "`git-repo-config --bool http.noEPSV`" = true ]; then
308 noepsv_opt="--disable-epsv"
309 fi
310
311 # Find $remote_name from ls-remote output.
312 head=$(
313 IFS=' '
314 echo "$ls_remote_result" |
315 while read sha1 name
316 do
317 test "z$name" = "z$remote_name" || continue
318 echo "$sha1"
319 break
320 done
321 )
322 expr "z$head" : "z$_x40\$" >/dev/null ||
323 die "No such ref $remote_name at $remote"
324 echo >&2 "Fetching $remote_name from $remote using $proto"
325 git-http-fetch -v -a "$head" "$remote/" || exit
326 ;;
327 rsync://*)
328 TMP_HEAD="$GIT_DIR/TMP_HEAD"
329 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
330 head=$(git-rev-parse --verify TMP_HEAD)
331 rm -f "$TMP_HEAD"
332 test "$rsync_slurped_objects" || {
333 rsync -av --ignore-existing --exclude info \
334 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
335
336 # Look at objects/info/alternates for rsync -- http will
337 # support it natively and git native ones will do it on
338 # the remote end. Not having that file is not a crime.
339 rsync -q "$remote/objects/info/alternates" \
340 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
341 rm -f "$GIT_DIR/TMP_ALT"
342 if test -f "$GIT_DIR/TMP_ALT"
343 then
344 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
345 while read alt
346 do
347 case "$alt" in 'bad alternate: '*) die "$alt";; esac
348 echo >&2 "Getting alternate: $alt"
349 rsync -av --ignore-existing --exclude info \
350 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
351 done
352 rm -f "$GIT_DIR/TMP_ALT"
353 fi
354 rsync_slurped_objects=t
355 }
356 ;;
357 *)
358 # We will do git native transport with just one call later.
359 continue ;;
360 esac
361
362 append_fetch_head "$head" "$remote" \
363 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
364
365 done
366
367 case "$remote" in
368 http://* | https://* | ftp://* | rsync://* )
369 ;; # we are already done.
370 *)
371 ( : subshell because we muck with IFS
372 pack_lockfile=
373 IFS=" $LF"
374 (
375 git-fetch-pack --thin $exec $keep "$remote" $rref || echo failed "$remote"
376 ) |
377 while read sha1 remote_name
378 do
379 case "$sha1" in
380 failed)
381 echo >&2 "Fetch failure: $remote"
382 exit 1 ;;
383 # special line coming from index-pack with the pack name
384 pack)
385 continue ;;
386 keep)
387 pack_lockfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
388 continue ;;
389 esac
390 found=
391 single_force=
392 for ref in $refs
393 do
394 case "$ref" in
395 +$remote_name:*)
396 single_force=t
397 not_for_merge=
398 found="$ref"
399 break ;;
400 .+$remote_name:*)
401 single_force=t
402 not_for_merge=t
403 found="$ref"
404 break ;;
405 .$remote_name:*)
406 not_for_merge=t
407 found="$ref"
408 break ;;
409 $remote_name:*)
410 not_for_merge=
411 found="$ref"
412 break ;;
413 esac
414 done
415 local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
416 append_fetch_head "$sha1" "$remote" \
417 "$remote_name" "$remote_nick" "$local_name" \
418 "$not_for_merge" || exit
419 done &&
420 if [ "$pack_lockfile" ]; then rm -f "$pack_lockfile"; fi
421 ) || exit ;;
422 esac
423
424}
425
426fetch_main "$reflist" || exit
427
428# automated tag following
429case "$no_tags$tags" in
430'')
431 case "$reflist" in
432 *:refs/*)
433 # effective only when we are following remote branch
434 # using local tracking branch.
435 taglist=$(IFS=" " &&
436 echo "$ls_remote_result" |
437 sed -n -e 's|^\('"$_x40"'\) \(refs/tags/.*\)^{}$|\1 \2|p' \
438 -e 's|^\('"$_x40"'\) \(refs/tags/.*\)$|\1 \2|p' |
439 while read sha1 name
440 do
441 git-show-ref --verify --quiet -- "$name" && continue
442 git-check-ref-format "$name" || {
443 echo >&2 "warning: tag ${name} ignored"
444 continue
445 }
446 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
447 echo >&2 "Auto-following $name"
448 echo ".${name}:${name}"
449 done)
450 esac
451 case "$taglist" in
452 '') ;;
453 ?*)
454 fetch_main "$taglist" || exit ;;
455 esac
456esac
457
458# If the original head was empty (i.e. no "master" yet), or
459# if we were told not to worry, we do not have to check.
460case "$orig_head" in
461'')
462 ;;
463?*)
464 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
465 if test "$curr_head" != "$orig_head"
466 then
467 git-update-ref \
468 -m "$rloga: Undoing incorrectly fetched HEAD." \
469 HEAD "$orig_head"
470 die "Cannot fetch into the current branch."
471 fi
472 ;;
473esac