1#!/bin/sh
2#
3USAGE='<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"
9LF='
11'
12IFS="$LF"
13rloga=fetch
15no_tags=
16tags=
17append=
18force=
19verbose=
20update_head_ok=
21exec=
22upload_pack=
23keep=--thin
24while case "$#" 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=--keep
55 ;;
56 --reflog-action=*)
57 rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`
58 ;;
59 -*)
60 usage
61 ;;
62 *)
63 break
64 ;;
65 esac
66 shift
67done
68case "$#" in
700)
71 test -f "$GIT_DIR/branches/origin" ||
72 test -f "$GIT_DIR/remotes/origin" ||
73 git-repo-config --get remote.origin.url >/dev/null ||
74 die "Where do you want to fetch from today?"
75 set origin ;;
76esac
77remote_nick="$1"
79remote=$(get_remote_url "$@")
80refs=
81rref=
82rsync_slurped_objects=
83rloga="$rloga $remote_nick"
85test "$remote_nick" = "$remote" || rloga="$rloga $remote"
86if test "" = "$append"
88then
89 : >"$GIT_DIR/FETCH_HEAD"
90fi
91append_fetch_head () {
93 head_="$1"
94 remote_="$2"
95 remote_name_="$3"
96 remote_nick_="$4"
97 local_name_="$5"
98 case "$6" in
99 t) not_for_merge_='not-for-merge' ;;
100 '') not_for_merge_= ;;
101 esac
102 # remote-nick is the URL given on the command line (or a shorthand)
104 # remote-name is the $GIT_DIR relative refs/ path we computed
105 # for this refspec.
106 # the $note_ variable will be fed to git-fmt-merge-msg for further
108 # processing.
109 case "$remote_name_" in
110 HEAD)
111 note_= ;;
112 refs/heads/*)
113 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
114 note_="branch '$note_' of " ;;
115 refs/tags/*)
116 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
117 note_="tag '$note_' of " ;;
118 refs/remotes/*)
119 note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
120 note_="remote branch '$note_' of " ;;
121 *)
122 note_="$remote_name of " ;;
123 esac
124 remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
125 remote_="$remote_1_"
126 note_="$note_$remote_"
127 # 2.6.11-tree tag would not be happy to be fed to resolve.
129 if git-cat-file commit "$head_" >/dev/null 2>&1
130 then
131 headc_=$(git-rev-parse --verify "$head_^0") || exit
132 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
133 [ "$verbose" ] && echo >&2 "* committish: $head_"
134 [ "$verbose" ] && echo >&2 " $note_"
135 else
136 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
137 [ "$verbose" ] && echo >&2 "* non-commit: $head_"
138 [ "$verbose" ] && echo >&2 " $note_"
139 fi
140 if test "$local_name_" != ""
141 then
142 # We are storing the head locally. Make sure that it is
143 # a fast forward (aka "reverse push").
144 fast_forward_local "$local_name_" "$head_" "$note_"
145 fi
146}
147fast_forward_local () {
149 mkdir -p "$(dirname "$GIT_DIR/$1")"
150 case "$1" in
151 refs/tags/*)
152 # Tags need not be pointing at commits so there
153 # is no way to guarantee "fast-forward" anyway.
154 if test -f "$GIT_DIR/$1"
155 then
156 if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
157 then
158 [ "$verbose" ] && echo >&2 "* $1: same as $3" ||:
159 else
160 echo >&2 "* $1: updating with $3"
161 git-update-ref -m "$rloga: updating tag" "$1" "$2"
162 fi
163 else
164 echo >&2 "* $1: storing $3"
165 git-update-ref -m "$rloga: storing tag" "$1" "$2"
166 fi
167 ;;
168 refs/heads/* | refs/remotes/*)
170 # $1 is the ref being updated.
171 # $2 is the new value for the ref.
172 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
173 if test "$local"
174 then
175 # Require fast-forward.
176 mb=$(git-merge-base "$local" "$2") &&
177 case "$2,$mb" in
178 $local,*)
179 if test -n "$verbose"
180 then
181 echo >&2 "* $1: same as $3"
182 fi
183 ;;
184 *,$local)
185 echo >&2 "* $1: fast forward to $3"
186 echo >&2 " from $local to $2"
187 git-update-ref -m "$rloga: fast-forward" "$1" "$2" "$local"
188 ;;
189 *)
190 false
191 ;;
192 esac || {
193 echo >&2 "* $1: does not fast forward to $3;"
194 case ",$force,$single_force," in
195 *,t,*)
196 echo >&2 " forcing update."
197 git-update-ref -m "$rloga: forced-update" "$1" "$2" "$local"
198 ;;
199 *)
200 echo >&2 " not updating."
201 exit 1
202 ;;
203 esac
204 }
205 else
206 echo >&2 "* $1: storing $3"
207 git-update-ref -m "$rloga: storing head" "$1" "$2"
208 fi
209 ;;
210 esac
211}
212case "$update_head_ok" in
214'')
215 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
216 ;;
217esac
218# If --tags (and later --heads or --all) is specified, then we are
220# not talking about defaults stored in Pull: line of remotes or
221# branches file, and just fetch those and refspecs explicitly given.
222# Otherwise we do what we always did.
223reflist=$(get_remote_refs_for_fetch "$@")
225if test "$tags"
226then
227 taglist=`IFS=" " &&
228 git-ls-remote $upload_pack --tags "$remote" |
229 while read sha1 name
230 do
231 case "$name" in
232 *^*) continue ;;
233 esac
234 if git-check-ref-format "$name"
235 then
236 echo ".${name}:${name}"
237 else
238 echo >&2 "warning: tag ${name} ignored"
239 fi
240 done`
241 if test "$#" -gt 1
242 then
243 # remote URL plus explicit refspecs; we need to merge them.
244 reflist="$reflist$LF$taglist"
245 else
246 # No explicit refspecs; fetch tags only.
247 reflist=$taglist
248 fi
249fi
250fetch_main () {
252 reflist="$1"
253 refs=
254 for ref in $reflist
256 do
257 refs="$refs$LF$ref"
258 # These are relative path from $GIT_DIR, typically starting at refs/
260 # but may be HEAD
261 if expr "z$ref" : 'z\.' >/dev/null
262 then
263 not_for_merge=t
264 ref=$(expr "z$ref" : 'z\.\(.*\)')
265 else
266 not_for_merge=
267 fi
268 if expr "z$ref" : 'z+' >/dev/null
269 then
270 single_force=t
271 ref=$(expr "z$ref" : 'z+\(.*\)')
272 else
273 single_force=
274 fi
275 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
276 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
277 rref="$rref$LF$remote_name"
279 # There are transports that can fetch only one head at a time...
281 case "$remote" in
282 http://* | https://*)
283 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
284 curl_extra_args="-k"
285 fi
286 max_depth=5
287 depth=0
288 head="ref: $remote_name"
289 while (expr "z$head" : "zref:" && expr $depth \< $max_depth) >/dev/null
290 do
291 remote_name_quoted=$(@@PERL@@ -e '
292 my $u = $ARGV[0];
293 $u =~ s/^ref:\s*//;
294 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
295 print "$u";
296 ' "$head")
297 head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted")
298 depth=$( expr \( $depth + 1 \) )
299 done
300 expr "z$head" : "z$_x40\$" >/dev/null ||
301 die "Failed to fetch $remote_name from $remote"
302 echo >&2 Fetching "$remote_name from $remote" using http
303 git-http-fetch -v -a "$head" "$remote/" || exit
304 ;;
305 rsync://*)
306 TMP_HEAD="$GIT_DIR/TMP_HEAD"
307 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
308 head=$(git-rev-parse --verify TMP_HEAD)
309 rm -f "$TMP_HEAD"
310 test "$rsync_slurped_objects" || {
311 rsync -av --ignore-existing --exclude info \
312 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
313 # Look at objects/info/alternates for rsync -- http will
315 # support it natively and git native ones will do it on
316 # the remote end. Not having that file is not a crime.
317 rsync -q "$remote/objects/info/alternates" \
318 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
319 rm -f "$GIT_DIR/TMP_ALT"
320 if test -f "$GIT_DIR/TMP_ALT"
321 then
322 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
323 while read alt
324 do
325 case "$alt" in 'bad alternate: '*) die "$alt";; esac
326 echo >&2 "Getting alternate: $alt"
327 rsync -av --ignore-existing --exclude info \
328 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
329 done
330 rm -f "$GIT_DIR/TMP_ALT"
331 fi
332 rsync_slurped_objects=t
333 }
334 ;;
335 *)
336 # We will do git native transport with just one call later.
337 continue ;;
338 esac
339 append_fetch_head "$head" "$remote" \
341 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
342 done
344 case "$remote" in
346 http://* | https://* | rsync://* )
347 ;; # we are already done.
348 *)
349 ( : subshell because we muck with IFS
350 IFS=" $LF"
351 (
352 git-fetch-pack $exec $keep "$remote" $rref || echo failed "$remote"
353 ) |
354 while read sha1 remote_name
355 do
356 case "$sha1" in
357 failed)
358 echo >&2 "Fetch failure: $remote"
359 exit 1 ;;
360 esac
361 found=
362 single_force=
363 for ref in $refs
364 do
365 case "$ref" in
366 +$remote_name:*)
367 single_force=t
368 not_for_merge=
369 found="$ref"
370 break ;;
371 .+$remote_name:*)
372 single_force=t
373 not_for_merge=t
374 found="$ref"
375 break ;;
376 .$remote_name:*)
377 not_for_merge=t
378 found="$ref"
379 break ;;
380 $remote_name:*)
381 not_for_merge=
382 found="$ref"
383 break ;;
384 esac
385 done
386 local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
387 append_fetch_head "$sha1" "$remote" \
388 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
389 done
390 ) || exit ;;
391 esac
392}
394fetch_main "$reflist"
396# automated tag following
398case "$no_tags$tags" in
399'')
400 case "$reflist" in
401 *:refs/*)
402 # effective only when we are following remote branch
403 # using local tracking branch.
404 taglist=$(IFS=" " &&
405 git-ls-remote $upload_pack --tags "$remote" |
406 sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
407 while read sha1 name
408 do
409 test -f "$GIT_DIR/$name" && continue
410 git-check-ref-format "$name" || {
411 echo >&2 "warning: tag ${name} ignored"
412 continue
413 }
414 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
415 echo >&2 "Auto-following $name"
416 echo ".${name}:${name}"
417 done)
418 esac
419 case "$taglist" in
420 '') ;;
421 ?*)
422 fetch_main "$taglist" ;;
423 esac
424esac
425# If the original head was empty (i.e. no "master" yet), or
427# if we were told not to worry, we do not have to check.
428case ",$update_head_ok,$orig_head," in
429*,, | t,* )
430 ;;
431*)
432 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
433 if test "$curr_head" != "$orig_head"
434 then
435 git-update-ref \
436 -m "$rloga: Undoing incorrectly fetched HEAD." \
437 HEAD "$orig_head"
438 die "Cannot fetch into the current branch."
439 fi
440 ;;
441esac