170c2cb048057e58b568888ea121da18cd63c1da
1 #!/bin/sh
2 #
4 USAGE='<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"
10 LF='
11 '
12 IFS="$LF"
14 rloga=fetch
15 no_tags=
16 tags=
17 append=
18 force=
19 verbose=
20 update_head_ok=
21 exec=
22 upload_pack=
23 keep=
24 while case "$#" in 0) break ;; esac
25 do
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
67 done
69 case "$#" in
70 0)
71 origin=$(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 ;;
75 esac
77 remote_nick="$1"
78 remote=$(get_remote_url "$@")
79 refs=
80 rref=
81 rsync_slurped_objects=
83 rloga="$rloga $remote_nick"
84 test "$remote_nick" = "$remote" || rloga="$rloga $remote"
86 if test "" = "$append"
87 then
88 : >"$GIT_DIR/FETCH_HEAD"
89 fi
91 # Global that is reused later
92 ls_remote_result=$(git ls-remote $upload_pack "$remote") ||
93 die "Cannot find the reflist at $remote"
95 append_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
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.
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_"
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
140 update_local_ref "$local_name_" "$head_" "$note_"
141 }
143 update_local_ref () {
144 # If we are storing the head locally make sure that it is
145 # a fast forward (aka "reverse push").
147 label_=$(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)
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 ;;
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" "$2"
220 fi
221 ;;
222 esac
223 }
225 case "$update_head_ok" in
226 '')
227 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
228 ;;
229 esac
231 # If --tags (and later --heads or --all) is specified, then we are
232 # not talking about defaults stored in Pull: line of remotes or
233 # branches file, and just fetch those and refspecs explicitly given.
234 # Otherwise we do what we always did.
236 reflist=$(get_remote_refs_for_fetch "$@")
237 if test "$tags"
238 then
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
267 fi
269 fetch_main () {
270 reflist="$1"
271 refs=
272 rref=
274 for ref in $reflist
275 do
276 refs="$refs$LF$ref"
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[^:]*:\(.*\)')
297 rref="$rref$LF$remote_name"
299 # There are transports that can fetch only one head at a time...
300 case "$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 max_depth=5
311 depth=0
312 head="ref: $remote_name"
313 while (expr "z$head" : "zref:" && expr $depth \< $max_depth) >/dev/null
314 do
315 remote_name_quoted=$(@@PERL@@ -e '
316 my $u = $ARGV[0];
317 $u =~ s/^ref:\s*//;
318 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
319 print "$u";
320 ' "$head")
321 head=$(curl -nsfL $curl_extra_args $noepsv_opt "$remote/$remote_name_quoted")
322 depth=$( expr \( $depth + 1 \) )
323 done
324 expr "z$head" : "z$_x40\$" >/dev/null ||
325 die "Failed to fetch $remote_name from $remote"
326 echo >&2 "Fetching $remote_name from $remote using $proto"
327 git-http-fetch -v -a "$head" "$remote/" || exit
328 ;;
329 rsync://*)
330 TMP_HEAD="$GIT_DIR/TMP_HEAD"
331 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
332 head=$(git-rev-parse --verify TMP_HEAD)
333 rm -f "$TMP_HEAD"
334 test "$rsync_slurped_objects" || {
335 rsync -av --ignore-existing --exclude info \
336 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
338 # Look at objects/info/alternates for rsync -- http will
339 # support it natively and git native ones will do it on
340 # the remote end. Not having that file is not a crime.
341 rsync -q "$remote/objects/info/alternates" \
342 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
343 rm -f "$GIT_DIR/TMP_ALT"
344 if test -f "$GIT_DIR/TMP_ALT"
345 then
346 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
347 while read alt
348 do
349 case "$alt" in 'bad alternate: '*) die "$alt";; esac
350 echo >&2 "Getting alternate: $alt"
351 rsync -av --ignore-existing --exclude info \
352 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
353 done
354 rm -f "$GIT_DIR/TMP_ALT"
355 fi
356 rsync_slurped_objects=t
357 }
358 ;;
359 *)
360 # We will do git native transport with just one call later.
361 continue ;;
362 esac
364 append_fetch_head "$head" "$remote" \
365 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
367 done
369 case "$remote" in
370 http://* | https://* | ftp://* | rsync://* )
371 ;; # we are already done.
372 *)
373 ( : subshell because we muck with IFS
374 pack_lockfile=
375 IFS=" $LF"
376 (
377 git-fetch-pack --thin $exec $keep "$remote" $rref || echo failed "$remote"
378 ) |
379 while read sha1 remote_name
380 do
381 case "$sha1" in
382 failed)
383 echo >&2 "Fetch failure: $remote"
384 exit 1 ;;
385 # special line coming from index-pack with the pack name
386 pack)
387 continue ;;
388 keep)
389 pack_lockfile="$GIT_OBJECT_DIRECTORY/pack/pack-$remote_name.keep"
390 continue ;;
391 esac
392 found=
393 single_force=
394 for ref in $refs
395 do
396 case "$ref" in
397 +$remote_name:*)
398 single_force=t
399 not_for_merge=
400 found="$ref"
401 break ;;
402 .+$remote_name:*)
403 single_force=t
404 not_for_merge=t
405 found="$ref"
406 break ;;
407 .$remote_name:*)
408 not_for_merge=t
409 found="$ref"
410 break ;;
411 $remote_name:*)
412 not_for_merge=
413 found="$ref"
414 break ;;
415 esac
416 done
417 local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
418 append_fetch_head "$sha1" "$remote" \
419 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
420 done
421 if [ "$pack_lockfile" ]; then rm -f "$pack_lockfile"; fi
422 ) || exit ;;
423 esac
425 }
427 fetch_main "$reflist"
429 # automated tag following
430 case "$no_tags$tags" in
431 '')
432 case "$reflist" in
433 *:refs/*)
434 # effective only when we are following remote branch
435 # using local tracking branch.
436 taglist=$(IFS=" " &&
437 echo "$ls_remote_result" |
438 sed -n -e 's|^\('"$_x40"'\) \(refs/tags/.*\)^{}$|\1 \2|p' \
439 -e 's|^\('"$_x40"'\) \(refs/tags/.*\)$|\1 \2|p' |
440 while read sha1 name
441 do
442 git-show-ref --verify --quiet -- "$name" && continue
443 git-check-ref-format "$name" || {
444 echo >&2 "warning: tag ${name} ignored"
445 continue
446 }
447 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
448 echo >&2 "Auto-following $name"
449 echo ".${name}:${name}"
450 done)
451 esac
452 case "$taglist" in
453 '') ;;
454 ?*)
455 fetch_main "$taglist" ;;
456 esac
457 esac
459 # If the original head was empty (i.e. no "master" yet), or
460 # if we were told not to worry, we do not have to check.
461 case "$orig_head" in
462 '')
463 ;;
464 ?*)
465 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
466 if test "$curr_head" != "$orig_head"
467 then
468 git-update-ref \
469 -m "$rloga: Undoing incorrectly fetched HEAD." \
470 HEAD "$orig_head"
471 die "Cannot fetch into the current branch."
472 fi
473 ;;
474 esac