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 die "Where do you want to fetch from today?"
74 set origin ;;
75esac
76remote_nick="$1"
78remote=$(get_remote_url "$@")
79refs=
80rref=
81rsync_slurped_objects=
82rloga="$rloga $remote_nick"
84test "$remote_nick" = "$remote" || rloga="$rloga $remote"
85if test "" = "$append"
87then
88 : >"$GIT_DIR/FETCH_HEAD"
89fi
90append_fetch_head () {
92 head_="$1"
93 remote_="$2"
94 remote_name_="$3"
95 remote_nick_="$4"
96 local_name_="$5"
97 case "$6" in
98 t) not_for_merge_='not-for-merge' ;;
99 '') not_for_merge_= ;;
100 esac
101 # remote-nick is the URL given on the command line (or a shorthand)
103 # remote-name is the $GIT_DIR relative refs/ path we computed
104 # for this refspec.
105 # the $note_ variable will be fed to git-fmt-merge-msg for further
107 # processing.
108 case "$remote_name_" in
109 HEAD)
110 note_= ;;
111 refs/heads/*)
112 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
113 note_="branch '$note_' of " ;;
114 refs/tags/*)
115 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
116 note_="tag '$note_' of " ;;
117 refs/remotes/*)
118 note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
119 note_="remote branch '$note_' of " ;;
120 *)
121 note_="$remote_name of " ;;
122 esac
123 remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
124 remote_="$remote_1_"
125 note_="$note_$remote_"
126 # 2.6.11-tree tag would not be happy to be fed to resolve.
128 if git-cat-file commit "$head_" >/dev/null 2>&1
129 then
130 headc_=$(git-rev-parse --verify "$head_^0") || exit
131 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
132 [ "$verbose" ] && echo >&2 "* committish: $head_"
133 [ "$verbose" ] && echo >&2 " $note_"
134 else
135 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
136 [ "$verbose" ] && echo >&2 "* non-commit: $head_"
137 [ "$verbose" ] && echo >&2 " $note_"
138 fi
139 if test "$local_name_" != ""
140 then
141 # We are storing the head locally. Make sure that it is
142 # a fast forward (aka "reverse push").
143 fast_forward_local "$local_name_" "$head_" "$note_"
144 fi
145}
146fast_forward_local () {
148 mkdir -p "$(dirname "$GIT_DIR/$1")"
149 case "$1" in
150 refs/tags/*)
151 # Tags need not be pointing at commits so there
152 # is no way to guarantee "fast-forward" anyway.
153 if test -f "$GIT_DIR/$1"
154 then
155 if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
156 then
157 [ "$verbose" ] && echo >&2 "* $1: same as $3" ||:
158 else
159 echo >&2 "* $1: updating with $3"
160 git-update-ref -m "$rloga: updating tag" "$1" "$2"
161 fi
162 else
163 echo >&2 "* $1: storing $3"
164 git-update-ref -m "$rloga: storing tag" "$1" "$2"
165 fi
166 ;;
167 refs/heads/* | refs/remotes/*)
169 # $1 is the ref being updated.
170 # $2 is the new value for the ref.
171 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
172 if test "$local"
173 then
174 # Require fast-forward.
175 mb=$(git-merge-base "$local" "$2") &&
176 case "$2,$mb" in
177 $local,*)
178 if test -n "$verbose"
179 then
180 echo >&2 "* $1: same as $3"
181 fi
182 ;;
183 *,$local)
184 echo >&2 "* $1: fast forward to $3"
185 echo >&2 " from $local to $2"
186 git-update-ref -m "$rloga: fast-forward" "$1" "$2" "$local"
187 ;;
188 *)
189 false
190 ;;
191 esac || {
192 echo >&2 "* $1: does not fast forward to $3;"
193 case ",$force,$single_force," in
194 *,t,*)
195 echo >&2 " forcing update."
196 git-update-ref -m "$rloga: forced-update" "$1" "$2" "$local"
197 ;;
198 *)
199 echo >&2 " not updating."
200 exit 1
201 ;;
202 esac
203 }
204 else
205 echo >&2 "* $1: storing $3"
206 git-update-ref -m "$rloga: storing head" "$1" "$2"
207 fi
208 ;;
209 esac
210}
211case "$update_head_ok" in
213'')
214 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
215 ;;
216esac
217# If --tags (and later --heads or --all) is specified, then we are
219# not talking about defaults stored in Pull: line of remotes or
220# branches file, and just fetch those and refspecs explicitly given.
221# Otherwise we do what we always did.
222reflist=$(get_remote_refs_for_fetch "$@")
224if test "$tags"
225then
226 taglist=`IFS=" " &&
227 git-ls-remote $upload_pack --tags "$remote" |
228 while read sha1 name
229 do
230 case "$name" in
231 *^*) continue ;;
232 esac
233 if git-check-ref-format "$name"
234 then
235 echo ".${name}:${name}"
236 else
237 echo >&2 "warning: tag ${name} ignored"
238 fi
239 done`
240 if test "$#" -gt 1
241 then
242 # remote URL plus explicit refspecs; we need to merge them.
243 reflist="$reflist$LF$taglist"
244 else
245 # No explicit refspecs; fetch tags only.
246 reflist=$taglist
247 fi
248fi
249fetch_main () {
251 reflist="$1"
252 refs=
253 for ref in $reflist
255 do
256 refs="$refs$LF$ref"
257 # These are relative path from $GIT_DIR, typically starting at refs/
259 # but may be HEAD
260 if expr "z$ref" : 'z\.' >/dev/null
261 then
262 not_for_merge=t
263 ref=$(expr "z$ref" : 'z\.\(.*\)')
264 else
265 not_for_merge=
266 fi
267 if expr "z$ref" : 'z+' >/dev/null
268 then
269 single_force=t
270 ref=$(expr "z$ref" : 'z+\(.*\)')
271 else
272 single_force=
273 fi
274 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
275 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
276 rref="$rref$LF$remote_name"
278 # There are transports that can fetch only one head at a time...
280 case "$remote" in
281 http://* | https://*)
282 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
283 curl_extra_args="-k"
284 fi
285 max_depth=5
286 depth=0
287 head="ref: $remote_name"
288 while (expr "z$head" : "zref:" && expr $depth \< $max_depth) >/dev/null
289 do
290 remote_name_quoted=$(@@PERL@@ -e '
291 my $u = $ARGV[0];
292 $u =~ s/^ref:\s*//;
293 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
294 print "$u";
295 ' "$head")
296 head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted")
297 depth=$( expr \( $depth + 1 \) )
298 done
299 expr "z$head" : "z$_x40\$" >/dev/null ||
300 die "Failed to fetch $remote_name from $remote"
301 echo >&2 Fetching "$remote_name from $remote" using http
302 git-http-fetch -v -a "$head" "$remote/" || exit
303 ;;
304 rsync://*)
305 TMP_HEAD="$GIT_DIR/TMP_HEAD"
306 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
307 head=$(git-rev-parse --verify TMP_HEAD)
308 rm -f "$TMP_HEAD"
309 test "$rsync_slurped_objects" || {
310 rsync -av --ignore-existing --exclude info \
311 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
312 # Look at objects/info/alternates for rsync -- http will
314 # support it natively and git native ones will do it on
315 # the remote end. Not having that file is not a crime.
316 rsync -q "$remote/objects/info/alternates" \
317 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
318 rm -f "$GIT_DIR/TMP_ALT"
319 if test -f "$GIT_DIR/TMP_ALT"
320 then
321 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
322 while read alt
323 do
324 case "$alt" in 'bad alternate: '*) die "$alt";; esac
325 echo >&2 "Getting alternate: $alt"
326 rsync -av --ignore-existing --exclude info \
327 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
328 done
329 rm -f "$GIT_DIR/TMP_ALT"
330 fi
331 rsync_slurped_objects=t
332 }
333 ;;
334 *)
335 # We will do git native transport with just one call later.
336 continue ;;
337 esac
338 append_fetch_head "$head" "$remote" \
340 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
341 done
343 case "$remote" in
345 http://* | https://* | rsync://* )
346 ;; # we are already done.
347 *)
348 ( : subshell because we muck with IFS
349 IFS=" $LF"
350 (
351 git-fetch-pack $exec $keep "$remote" $rref || echo failed "$remote"
352 ) |
353 while read sha1 remote_name
354 do
355 case "$sha1" in
356 failed)
357 echo >&2 "Fetch failure: $remote"
358 exit 1 ;;
359 esac
360 found=
361 single_force=
362 for ref in $refs
363 do
364 case "$ref" in
365 +$remote_name:*)
366 single_force=t
367 not_for_merge=
368 found="$ref"
369 break ;;
370 .+$remote_name:*)
371 single_force=t
372 not_for_merge=t
373 found="$ref"
374 break ;;
375 .$remote_name:*)
376 not_for_merge=t
377 found="$ref"
378 break ;;
379 $remote_name:*)
380 not_for_merge=
381 found="$ref"
382 break ;;
383 esac
384 done
385 local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
386 append_fetch_head "$sha1" "$remote" \
387 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
388 done
389 ) || exit ;;
390 esac
391}
393fetch_main "$reflist"
395# automated tag following
397case "$no_tags$tags" in
398'')
399 case "$reflist" in
400 *:refs/*)
401 # effective only when we are following remote branch
402 # using local tracking branch.
403 taglist=$(IFS=" " &&
404 git-ls-remote $upload_pack --tags "$remote" |
405 sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
406 while read sha1 name
407 do
408 test -f "$GIT_DIR/$name" && continue
409 git-check-ref-format "$name" || {
410 echo >&2 "warning: tag ${name} ignored"
411 continue
412 }
413 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
414 echo >&2 "Auto-following $name"
415 echo ".${name}:${name}"
416 done)
417 esac
418 case "$taglist" in
419 '') ;;
420 ?*)
421 fetch_main "$taglist" ;;
422 esac
423esac
424# If the original head was empty (i.e. no "master" yet), or
426# if we were told not to worry, we do not have to check.
427case ",$update_head_ok,$orig_head," in
428*,, | t,* )
429 ;;
430*)
431 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
432 if test "$curr_head" != "$orig_head"
433 then
434 git-update-ref \
435 -m "$rloga: Undoing incorrectly fetched HEAD." \
436 HEAD "$orig_head"
437 die "Cannot fetch into the current branch."
438 fi
439 ;;
440esac