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=
27no_progress=
28test -t 1 || no_progress=--no-progress
29while case "$#" in 0) break ;; esac
30do
31 case "$1" in
32 -a|--a|--ap|--app|--appe|--appen|--append)
33 append=t
34 ;;
35 --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
36 --upload-pa|--upload-pac|--upload-pack)
37 shift
38 exec="--upload-pack=$1"
39 ;;
40 --upl=*|--uplo=*|--uploa=*|--upload=*|\
41 --upload-=*|--upload-p=*|--upload-pa=*|--upload-pac=*|--upload-pack=*)
42 exec=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)')
43 shift
44 ;;
45 -f|--f|--fo|--for|--forc|--force)
46 force=t
47 ;;
48 -t|--t|--ta|--tag|--tags)
49 tags=t
50 ;;
51 -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
52 no_tags=t
53 ;;
54 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
55 --update-he|--update-hea|--update-head|--update-head-|\
56 --update-head-o|--update-head-ok)
57 update_head_ok=t
58 ;;
59 -v|--verbose)
60 verbose=Yes
61 ;;
62 -k|--k|--ke|--kee|--keep)
63 keep='-k -k'
64 ;;
65 --depth=*)
66 shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
67 ;;
68 --depth)
69 shift
70 shallow_depth="--depth=$1"
71 ;;
72 -*)
73 usage
74 ;;
75 *)
76 break
77 ;;
78 esac
79 shift
80done
81case "$#" in
830)
84 origin=$(get_default_remote)
85 test -n "$(get_remote_url ${origin})" ||
86 die "Where do you want to fetch from today?"
87 set x $origin ; shift ;;
88esac
89if test -z "$exec"
91then
92 # No command line override and we have configuration for the remote.
93 exec="--upload-pack=$(get_uploadpack $1)"
94fi
95remote_nick="$1"
97remote=$(get_remote_url "$@")
98refs=
99rref=
100rsync_slurped_objects=
101if test "" = "$append"
103then
104 : >"$GIT_DIR/FETCH_HEAD"
105fi
106# Global that is reused later
108ls_remote_result=$(git ls-remote $exec "$remote") ||
109 die "Cannot get the repository state from $remote"
110append_fetch_head () {
112 head_="$1"
113 remote_="$2"
114 remote_name_="$3"
115 remote_nick_="$4"
116 local_name_="$5"
117 case "$6" in
118 t) not_for_merge_='not-for-merge' ;;
119 '') not_for_merge_= ;;
120 esac
121 # remote-nick is the URL given on the command line (or a shorthand)
123 # remote-name is the $GIT_DIR relative refs/ path we computed
124 # for this refspec.
125 # the $note_ variable will be fed to git-fmt-merge-msg for further
127 # processing.
128 case "$remote_name_" in
129 HEAD)
130 note_= ;;
131 refs/heads/*)
132 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
133 note_="branch '$note_' of " ;;
134 refs/tags/*)
135 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
136 note_="tag '$note_' of " ;;
137 refs/remotes/*)
138 note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
139 note_="remote branch '$note_' of " ;;
140 *)
141 note_="$remote_name of " ;;
142 esac
143 remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
144 remote_="$remote_1_"
145 note_="$note_$remote_"
146 # 2.6.11-tree tag would not be happy to be fed to resolve.
148 if git-cat-file commit "$head_" >/dev/null 2>&1
149 then
150 headc_=$(git-rev-parse --verify "$head_^0") || exit
151 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
152 else
153 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
154 fi
155 update_local_ref "$local_name_" "$head_" "$note_"
157}
158update_local_ref () {
160 # If we are storing the head locally make sure that it is
161 # a fast forward (aka "reverse push").
162 label_=$(git-cat-file -t $2)
164 newshort_=$(git-rev-parse --short $2)
165 if test -z "$1" ; then
166 [ "$verbose" ] && echo >&2 "* fetched $3"
167 [ "$verbose" ] && echo >&2 " $label_: $newshort_"
168 return 0
169 fi
170 oldshort_=$(git show-ref --hash --abbrev "$1" 2>/dev/null)
171 case "$1" in
173 refs/tags/*)
174 # Tags need not be pointing at commits so there
175 # is no way to guarantee "fast-forward" anyway.
176 if test -n "$oldshort_"
177 then
178 if now_=$(git show-ref --hash "$1") && test "$now_" = "$2"
179 then
180 [ "$verbose" ] && echo >&2 "* $1: same as $3"
181 [ "$verbose" ] && echo >&2 " $label_: $newshort_" ||:
182 else
183 echo >&2 "* $1: updating with $3"
184 echo >&2 " $label_: $newshort_"
185 git-update-ref -m "$GIT_REFLOG_ACTION: updating tag" "$1" "$2"
186 fi
187 else
188 echo >&2 "* $1: storing $3"
189 echo >&2 " $label_: $newshort_"
190 git-update-ref -m "$GIT_REFLOG_ACTION: storing tag" "$1" "$2"
191 fi
192 ;;
193 refs/heads/* | refs/remotes/*)
195 # $1 is the ref being updated.
196 # $2 is the new value for the ref.
197 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
198 if test "$local"
199 then
200 # Require fast-forward.
201 mb=$(git-merge-base "$local" "$2") &&
202 case "$2,$mb" in
203 $local,*)
204 if test -n "$verbose"
205 then
206 echo >&2 "* $1: same as $3"
207 echo >&2 " $label_: $newshort_"
208 fi
209 ;;
210 *,$local)
211 echo >&2 "* $1: fast forward to $3"
212 echo >&2 " old..new: $oldshort_..$newshort_"
213 git-update-ref -m "$GIT_REFLOG_ACTION: fast-forward" "$1" "$2" "$local"
214 ;;
215 *)
216 false
217 ;;
218 esac || {
219 case ",$force,$single_force," in
220 *,t,*)
221 echo >&2 "* $1: forcing update to non-fast forward $3"
222 echo >&2 " old...new: $oldshort_...$newshort_"
223 git-update-ref -m "$GIT_REFLOG_ACTION: forced-update" "$1" "$2" "$local"
224 ;;
225 *)
226 echo >&2 "* $1: not updating to non-fast forward $3"
227 echo >&2 " old...new: $oldshort_...$newshort_"
228 exit 1
229 ;;
230 esac
231 }
232 else
233 echo >&2 "* $1: storing $3"
234 echo >&2 " $label_: $newshort_"
235 git-update-ref -m "$GIT_REFLOG_ACTION: storing head" "$1" "$2"
236 fi
237 ;;
238 esac
239}
240# updating the current HEAD with git-fetch in a bare
242# repository is always fine.
243if test -z "$update_head_ok" && test $(is_bare_repository) = false
244then
245 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
246fi
247# If --tags (and later --heads or --all) is specified, then we are
249# not talking about defaults stored in Pull: line of remotes or
250# branches file, and just fetch those and refspecs explicitly given.
251# Otherwise we do what we always did.
252reflist=$(get_remote_refs_for_fetch "$@")
254if test "$tags"
255then
256 taglist=`IFS=' ' &&
257 echo "$ls_remote_result" |
258 git-show-ref --exclude-existing=refs/tags/ |
259 while read sha1 name
260 do
261 echo ".${name}:${name}"
262 done` || exit
263 if test "$#" -gt 1
264 then
265 # remote URL plus explicit refspecs; we need to merge them.
266 reflist="$reflist$LF$taglist"
267 else
268 # No explicit refspecs; fetch tags only.
269 reflist=$taglist
270 fi
271fi
272fetch_main () {
274 reflist="$1"
275 refs=
276 rref=
277 for ref in $reflist
279 do
280 refs="$refs$LF$ref"
281 # These are relative path from $GIT_DIR, typically starting at refs/
283 # but may be HEAD
284 if expr "z$ref" : 'z\.' >/dev/null
285 then
286 not_for_merge=t
287 ref=$(expr "z$ref" : 'z\.\(.*\)')
288 else
289 not_for_merge=
290 fi
291 if expr "z$ref" : 'z+' >/dev/null
292 then
293 single_force=t
294 ref=$(expr "z$ref" : 'z+\(.*\)')
295 else
296 single_force=
297 fi
298 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
299 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
300 rref="$rref$LF$remote_name"
302 # There are transports that can fetch only one head at a time...
304 case "$remote" in
305 http://* | https://* | ftp://*)
306 test -n "$shallow_depth" &&
307 die "shallow clone with http not supported"
308 proto=`expr "$remote" : '\([^:]*\):'`
309 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
310 curl_extra_args="-k"
311 fi
312 if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
313 "`git-config --bool http.noEPSV`" = true ]; then
314 noepsv_opt="--disable-epsv"
315 fi
316 # Find $remote_name from ls-remote output.
318 head=$(
319 IFS=' '
320 echo "$ls_remote_result" |
321 while read sha1 name
322 do
323 test "z$name" = "z$remote_name" || continue
324 echo "$sha1"
325 break
326 done
327 )
328 expr "z$head" : "z$_x40\$" >/dev/null ||
329 die "No such ref $remote_name at $remote"
330 echo >&2 "Fetching $remote_name from $remote using $proto"
331 git-http-fetch -v -a "$head" "$remote/" || exit
332 ;;
333 rsync://*)
334 test -n "$shallow_depth" &&
335 die "shallow clone with rsync not supported"
336 TMP_HEAD="$GIT_DIR/TMP_HEAD"
337 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
338 head=$(git-rev-parse --verify TMP_HEAD)
339 rm -f "$TMP_HEAD"
340 test "$rsync_slurped_objects" || {
341 rsync -av --ignore-existing --exclude info \
342 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
343 # Look at objects/info/alternates for rsync -- http will
345 # support it natively and git native ones will do it on
346 # the remote end. Not having that file is not a crime.
347 rsync -q "$remote/objects/info/alternates" \
348 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
349 rm -f "$GIT_DIR/TMP_ALT"
350 if test -f "$GIT_DIR/TMP_ALT"
351 then
352 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
353 while read alt
354 do
355 case "$alt" in 'bad alternate: '*) die "$alt";; esac
356 echo >&2 "Getting alternate: $alt"
357 rsync -av --ignore-existing --exclude info \
358 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
359 done
360 rm -f "$GIT_DIR/TMP_ALT"
361 fi
362 rsync_slurped_objects=t
363 }
364 ;;
365 *)
366 # We will do git native transport with just one call later.
367 continue ;;
368 esac
369 append_fetch_head "$head" "$remote" \
371 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
372 done
374 case "$remote" in
376 http://* | https://* | ftp://* | rsync://* )
377 ;; # we are already done.
378 *)
379 ( : subshell because we muck with IFS
380 IFS=" $LF"
381 (
382 git-fetch-pack --thin $exec $keep $shallow_depth $no_progress \
383 "$remote" $rref ||
384 echo failed "$remote"
385 ) |
386 (
387 trap '
388 if test -n "$keepfile" && test -f "$keepfile"
389 then
390 rm -f "$keepfile"
391 fi
392 ' 0
393 keepfile=
395 while read sha1 remote_name
396 do
397 case "$sha1" in
398 failed)
399 echo >&2 "Fetch failure: $remote"
400 exit 1 ;;
401 # special line coming from index-pack with the pack name
402 pack)
403 continue ;;
404 keep)
405 keepfile="$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 )
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" != "$orig_head"
480 then
481 git-update-ref \
482 -m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
483 HEAD "$orig_head"
484 die "Cannot fetch into the current branch."
485 fi
486 ;;
487esac